# encoding: utf-8
import settings
import os
import stat
import simplejson as json
import re
import sys
import urllib2
from urllib import quote
from django.core.urlresolvers import reverse
from django.core.mail import send_mail
from django.contrib import messages
from django.contrib.sites.models import Site, RequestSite
from django.db import IntegrityError
from django.http import HttpResponse, HttpResponseRedirect, Http404
from django.shortcuts import render_to_response, redirect
from django.template import Context, loader, RequestContext
from django.views.decorators.csrf import csrf_protect

from django.core.cache import cache
from django.http import HttpResponse, HttpResponseServerError 

from auth.decorators import login_required
from auth.forms import AuthenticationForm, PasswordResetForm, SetPasswordForm, \
    PasswordChangeForm
from auth.tokens import default_token_generator
from seaserv import ccnet_rpc, ccnet_threaded_rpc, get_groups, get_users, get_repos, \
    get_repo, get_commits, get_branches, \
    seafserv_threaded_rpc, seafserv_rpc, get_binding_peerids, get_ccnetuser, \
    get_group_repoids, check_group_staff
from pysearpc import SearpcError

from seahub.base.accounts import CcnetUser
from seahub.contacts.models import Contact
from seahub.notifications.models import UserNotification
from forms import AddUserForm
from utils import go_permission_error, go_error, list_to_string, \
    get_httpserver_root, get_ccnetapplet_root, gen_token, \
    calculate_repo_last_modify, valid_previewed_file, \
    check_filename_with_rename, get_accessible_repos, EMPTY_SHA1
from seahub.profile.models import Profile
from settings import FILE_PREVIEW_MAX_SIZE

@login_required
def root(request):
    return HttpResponseRedirect(reverse(myhome))

def peers(request):
    peer_type = request.REQUEST.get('type', 'all')
    peer_ids = ccnet_rpc.list_peers()
    peers = []
    for peer_id in peer_ids.split("\n"):
        # too handle the ending '\n'
        if peer_id == '':
            continue
        peer = ccnet_rpc.get_peer(peer_id)
        if peer_type == 'all':
            peers.append(peer)
        if peer_type == 'mypeer':
            if peer.props.role_list.find('MyPeer') != -1:
                peers.append(peer)

    users = get_users()
    return render_to_response('peers.html', { 
            'peers': peers,
            'users': users,
            }, context_instance=RequestContext(request))

def validate_owner(request, repo_id):
    """
    Check whether email in the request own the repo
    
    """
    return seafserv_threaded_rpc.is_repo_owner(request.user.username, repo_id)

def validate_emailuser(emailuser):
    """
    check whether emailuser is in the database

    """
    try:
        user = ccnet_threaded_rpc.get_emailuser(emailuser)
    except:
        user = None
        
    if user:
        return True
    else:
        return False

def check_shared_repo(request, repo_id):
    """
    Check whether user has been shared this repo or
    the repo share to the groups user join or
    got token if user is not logged in
    
    """
    if not request.user.is_authenticated():
        token = request.COOKIES.get('anontoken', None)
        if token:
            return True
        else:
            return False

    repos = seafserv_threaded_rpc.list_share_repos(request.user.username, 'to_email', -1, -1)
    for repo in repos:
        if repo.props.id == repo_id:
            return True

    groups = ccnet_threaded_rpc.get_groups(request.user.username)
    # for every group that user joined...    
    for group in groups:
        # ...get repo ids in that group, and check whether repo ids contains that repo id 
        repo_ids = get_group_repoids(group.props.id)
        if repo_id in repo_ids:
            return True

    return False

def access_to_repo(request, repo_id, repo_ap):
    """
    Check whether user in the request can access to repo, which means user can
    view directory entries on repo page.

    """
    if repo_ap == 'own' and not validate_owner(request, repo_id) \
            and not check_shared_repo(request, repo_id) and not request.user.is_staff:
        return False
    else:
        return True

def gen_path_link(path, repo_name):
    """
    Generate navigate paths and links in repo page.
    Note: `path` must be end with '/'.
    
    """
    paths = []
    links = []
    if path and path != '/':
        paths = path[1:-1].split('/')
        i=1
        for name in paths:
            link = '/' + '/'.join(paths[:i])
            i = i + 1
            links.append(link)
    paths.insert(0, repo_name)
    links.insert(0, '/')
        
    zipped = zip(paths, links)
    
    return zipped
    
def render_repo(request, repo_id, error=''):
    # get repo web access property, if no repo access property in db, then
    # assume repo ap is 'own'
    repo_ap = seafserv_threaded_rpc.repo_query_access_property(repo_id)
    if not repo_ap:
        repo_ap = 'own'

    # check whether user can view repo
    if access_to_repo(request, repo_id, repo_ap):
        can_access = True
    else:
        can_access = False

    # check whether use is repo owner
    if validate_owner(request, repo_id):
        is_owner = True
    else:
        is_owner = False
    
    repo = get_repo(repo_id)
    if not repo:
        return go_error(request, u'该同步目录不存在')

    # query whether set password if repo is encrypted
    password_set = False
    if repo.props.encrypted:
        try:
            ret = seafserv_rpc.is_passwd_set(repo_id, request.user.username)
            if ret == 1:
                password_set = True
        except SearpcError, e:
            return go_error(request, e.msg)

    # view newest worktree or history worktree
    commit_id = request.GET.get('commit_id', '')
    view_history = True if commit_id else False
    current_commit = seafserv_rpc.get_commit(commit_id)
    if not current_commit:
        current_commit = get_commits(repo_id, 0, 1)[0]
    
    # query repo infomation
    repo_size = seafserv_threaded_rpc.server_repo_size(repo_id)
#    latest_commit = get_commits(repo_id, 0, 1)[0]

    # get repo dirents
    dirs = []
    path = ''
    zipped = []
    dir_list = []
    file_list = []
    if not repo.props.encrypted or password_set:
        path = request.GET.get('p', '/')
        if path[-1] != '/':
            path = path + '/'
        
        if current_commit.root_id == EMPTY_SHA1:
            dirs = []
        else:
            try:
                dirs = seafserv_rpc.list_dir_by_path(current_commit.id,
                                                     path.encode('utf-8'))
            except SearpcError, e:
                return go_error(request, e.msg)
            for dirent in dirs:
                if stat.S_ISDIR(dirent.props.mode):
                    dir_list.append(dirent)
                else:
                    file_list.append(dirent)
                    try:
                        dirent.file_size = seafserv_rpc.get_file_size(dirent.obj_id)
                    except:
                        dirent.file_size = 0
            dir_list.sort(lambda x, y : cmp(x.obj_name.lower(),
                                            y.obj_name.lower()))
            file_list.sort(lambda x, y : cmp(x.obj_name.lower(),
                                             y.obj_name.lower()))

    if request.user.is_authenticated() and not view_history:
        try:
            accessible_repos = get_accessible_repos(request, repo)
        except SearpcError, e:
            error_msg = e.msg
            return go_error(request, error_msg)
    else:
         accessible_repos = []   

    # generate path and link
    zipped = gen_path_link(path, repo.name)

    return render_to_response('repo.html', {
            "repo": repo,
            "can_access": can_access,
            "current_commit": current_commit,
            "view_history": view_history,
            "is_owner": is_owner,
            "password_set": password_set,
            "repo_ap": repo_ap,
            "repo_size": repo_size,
            "dir_list": dir_list,
            "file_list": file_list,
            "path" : path,
            "zipped" : zipped,
            "error" : error,
            "accessible_repos" : accessible_repos,
            }, context_instance=RequestContext(request))

@login_required    
def repo_upload_file(request, repo_id):
    repo = get_repo(repo_id)
    total_space = pow(2,30)
    used_space = seafserv_threaded_rpc.get_user_quota_usage(request.user.username)
    ############ GET ############
    if request.method == 'GET':
        parent_dir = request.GET.get('p', '/')
        zipped = gen_path_link (parent_dir, repo.name)
        # TODO: per user quota
        return render_to_response ('repo_upload_file.html', {
            "repo": repo,
            "parent_dir": parent_dir,
            "used_space": used_space,
            "total_space": total_space,
            "zipped": zipped,
            "max_upload_file_size": settings.MAX_UPLOAD_FILE_SIZE,
            }, context_instance=RequestContext(request))
        
    ############ POST ############
    parent_dir = request.POST.get('parent_dir', '/')
    def render_upload_error(error_msg):
        zipped = gen_path_link (parent_dir, repo.name)
        return render_to_response ('repo_upload_file.html', {
            "error_msg": error_msg,
            "repo": repo,
            "used_space": used_space,
            "total_space": total_space,
            "zipped": zipped,
            "parent_dir": parent_dir,
            "max_upload_file_size": settings.MAX_UPLOAD_FILE_SIZE,
            }, context_instance=RequestContext(request))
        
    try:
        tmp_file = request.FILES['file']
    except:
        error_msg = u'请选择一个文件'
        return render_upload_error(error_msg)

    tmp_file_path = tmp_file.temporary_file_path()
    if not os.access(tmp_file_path, os.F_OK):
        error_msg = u'上传文件失败'
        return render_upload_error(error_msg)

    def remove_tmp_file():
        try:
            os.remove(tmp_file.temporary_file_path())
        except:
            pass

    # rename the file if there is name conflicts
    filename = check_filename_with_rename(repo_id, parent_dir, tmp_file.name)
    if len(filename) > settings.MAX_UPLOAD_FILE_NAME_LEN:
        remove_tmp_file()
        error_msg = u"您上传的文件名称太长"
        return go_error(request, error_msg)

    if tmp_file.size > settings.MAX_UPLOAD_FILE_SIZE:
        error_msg = u"您上传的文件太大"
        remove_tmp_file()
        return go_error(request, error_msg)

    try:
        seafserv_threaded_rpc.put_file (repo_id, tmp_file_path, parent_dir,
                                        filename, request.user.username);
    except SearpcError, e:
        remove_tmp_file()
        error_msg = e.msg
        return render_upload_error(error_msg)
    else:
        remove_tmp_file()
        url = reverse('repo', args=[repo_id]) + ('?p=%s' % parent_dir)
        return HttpResponseRedirect(url)
    
def get_subdir(request):
    repo_id = request.GET.get('repo_id', '')
    path = request.GET.get('path', '')

    if not (repo_id and path):
        return go_error(request)

    latest_commit = get_commits(repo_id, 0, 1)[0]
    try:
        dirents = seafserv_rpc.list_dir_by_path(latest_commit.id, path.encode('utf-8'))
    except SearpcError, e:
        return go_error(request, e.msg)

    subdirs = []
    for dirent in dirents:
        if not stat.S_ISDIR(dirent.props.mode):
            continue

        dirent.has_subdir = False
        path_ = os.path.join (path, dirent.obj_name)
        try:
            dirs_ = seafserv_rpc.list_dir_by_path(latest_commit.id, path_.encode('utf-8'))
        except SearpcError, e:
            return go_error(request, e.msg)

        for dirent_ in dirs_:
            if stat.S_ISDIR(dirent_.props.mode):
                dirent.has_subdir = True
                break

        if dirent.has_subdir:
            subdir = {
                'data': dirent.obj_name,
                'attr': {'repo_id': repo_id },
                'state': 'closed'
                    }
            subdirs.append(subdir)
        else:
            subdirs.append(dirent.obj_name)

    content_type = 'application/json; charset=utf-8'
    return HttpResponse(json.dumps(subdirs),
                            content_type=content_type)
 
def repo(request, repo_id):
    if request.method == 'GET':
        return render_repo(request, repo_id)
    elif request.method == 'POST':
        password = request.POST.get('password', '')
        if not password:
            return render_repo(request, repo_id, u'密码不能为空')

        try:
            seafserv_threaded_rpc.set_passwd(repo_id, request.user.username, password)
        except SearpcError, e:
            if e.msg == 'Bad arguments':
                return go_error(request, u'url 格式不正确')
            elif e.msg == 'Repo is not encrypted':
                return render_repo(request, repo_id)
            elif e.msg == 'Incorrect password':
                return render_repo(request, repo_id, u'密码不正确，请重新输入')
            elif e.msg == 'Internal server error':
                return go_error(request, u'服务器内部故障')
            else:
                return go_error(request, u'未知错误')

        return render_repo(request, repo_id)

@login_required
def repo_history(request, repo_id):
    """
    View repo history
    """
    repo_ap = seafserv_threaded_rpc.repo_query_access_property(repo_id)
    if not repo_ap:
        repo_ap = 'own'
        
    if not access_to_repo(request, repo_id, repo_ap):
        return go_permission_error(request, u'无法浏览该同步目录修改历史')
    
    repo = get_repo(repo_id)

    password_set = False
    if repo.props.encrypted:
        try:
            ret = seafserv_rpc.is_passwd_set(repo_id, request.user.username)
            if ret == 1:
                password_set = True
        except SearpcError, e:
            return go_error(request, e.msg)

    if repo.props.encrypted and not password_set:
        return HttpResponseRedirect(reverse('repo', args=[repo_id]))

    try:
        current_page = int(request.GET.get('page', '1'))
        per_page= int(request.GET.get('per_page', '25'))
    except ValueError:
        current_page = 1
        per_page = 25

    commits_all = get_commits(repo_id, per_page * (current_page -1),
                              per_page + 1)
    commits = commits_all[:per_page]

    if len(commits_all) == per_page + 1:
        page_next = True
    else:
        page_next = False

    is_owner = False
    if request.user.is_authenticated():
        if validate_owner(request, repo_id):
            is_owner = True

    return render_to_response('repo_history.html', {
            "repo": repo,
            "commits": commits,
            'current_page': current_page,
            'prev_page': current_page-1,
            'next_page': current_page+1,
            'per_page': per_page,
            'page_next': page_next,
            'is_owner': is_owner,
            }, context_instance=RequestContext(request))

def repo_history_revert(request, repo_id):
    """
    Only repo owner can revert repo.
    """
    if not validate_owner(request, repo_id):
        return go_permission_error(request, u'只有同步目录拥有者有权还原目录')
    
    repo = get_repo(repo_id)
    if not repo:
        raise Http404

    password_set = False
    if repo.props.encrypted:
        try:
            ret = seafserv_rpc.is_passwd_set(repo_id, request.user.username)
            if ret == 1:
                password_set = True
        except SearpcError, e:
            return go_error(request, e.msg)

    if repo.props.encrypted and not password_set:
        return HttpResponseRedirect(reverse('repo', args=[repo_id]))

    commit_id = request.GET.get('commit_id', '')
    if not commit_id:
        return go_error(request, u'请指定历史记录 ID')

    res = request.user.username.split('@')
    user_name = res[0]

    try:
        seafserv_threaded_rpc.revert_on_server(repo_id, commit_id, user_name)
    except SearpcError, e:
        if e.msg == 'Bad arguments':
            return go_error(request, u'非法参数')
        elif e.msg == 'No such repo':
            return go_error(request, u'同步目录不存在')
        elif e.msg == "Commit doesn't exist":
            return go_error(request, u'指定的历史记录不存在')
        else:
            return go_error(request, u'未知错误')

    return HttpResponseRedirect(reverse(repo_history, args=[repo_id]))

def get_diff(repo_id, arg1, arg2):
    lists = {'new' : [], 'removed' : [], 'renamed' : [], 'modified' : []}

    diff_result = seafserv_threaded_rpc.get_diff(repo_id, arg1, arg2)
    if not diff_result:
        return lists

    for d in diff_result:
        if d.status == "add":
            lists['new'].append(d.name)
        elif d.status == "del":
            lists['removed'].append(d.name)
        elif d.status == "mov":
            lists['renamed'].append(d.name + " ==> " + d.new_name)
        elif d.status == "mod":
            lists['modified'].append(d.name)

    return lists

def repo_history_changes(request, repo_id):
    changes = {}
    content_type = 'application/json; charset=utf-8'

    repo_ap = seafserv_threaded_rpc.repo_query_access_property(repo_id)
    if repo_ap == None:
        repo_ap = 'own'
        
    if not access_to_repo(request, repo_id, repo_ap):
        return HttpResponse(json.dumps(changes),
                            content_type=content_type)

    repo = get_repo(repo_id)
    if not repo:
        return HttpResponse(json.dumps(changes),
                            content_type=content_type)

    password_set = False
    if repo.props.encrypted:
        try:
            ret = seafserv_rpc.is_passwd_set(repo_id, request.user.username)
            if ret == 1:
                password_set = True
        except:
            return HttpResponse(json.dumps(changes),
                                content_type=content_type)

    if repo.props.encrypted and not password_set:
        return HttpResponse(json.dumps(changes),
                            content_type=content_type)

    commit_id = request.GET.get('commit_id', '')
    if not commit_id:
        return HttpResponse(json.dumps(changes),
                            content_type=content_type)

    changes = get_diff(repo_id, '', commit_id)

    return HttpResponse(json.dumps(changes),
                        content_type=content_type)
    
@login_required
def modify_token(request, repo_id):
    if not validate_owner(request, repo_id):
        return HttpResponseRedirect(reverse('repo', args=[repo_id]))

    token = request.POST.get('token', '')
    if token:
        seafserv_threaded_rpc.set_repo_token(repo_id, token)

    return HttpResponseRedirect(reverse('repo', args=[repo_id]))

@login_required
def remove_repo(request, repo_id):
    if not validate_owner(request, repo_id) and not request.user.is_staff:
        return go_permission_error(request, u'删除同步目录失败')
    
    seafserv_threaded_rpc.remove_repo(repo_id)
    next = request.GET.get('next', '/')
    return HttpResponseRedirect(next)
    
#@login_required
#def remove_fetched_repo(request, user_id, repo_id):
#    if user_id and repo_id:
#        seafserv_threaded_rpc.remove_fetched_repo (user_id, repo_id)
#        
#    return HttpResponseRedirect(request.META['HTTP_REFERER'])

@login_required
def myhome(request):
    owned_repos = []
    quota_usage = 0
    output_msg = {}

    email = request.user.username
    quota_usage = seafserv_threaded_rpc.get_user_quota_usage(email)

    # Repos that I own
    owned_repos = seafserv_threaded_rpc.list_owned_repos(email)
    calculate_repo_last_modify(owned_repos)
    owned_repos.sort(lambda x, y: cmp(y.latest_modify, x.latest_modify))
    
    # Repos that are share to me
    in_repos = seafserv_threaded_rpc.list_share_repos(email,
                                                      'to_email', -1, -1)
    calculate_repo_last_modify(in_repos)
    in_repos.sort(lambda x, y: cmp(y.latest_modify, x.latest_modify))

    # my contacts
    contacts = Contact.objects.filter(user_email=email)

    # user notifications
    grpmsg_list = []
    grpmsg_reply_list = []
    notes = UserNotification.objects.filter(to_user=request.user.username)
    for n in notes:
        if n.msg_type == 'group_msg':
            grpmsg_list.append(n.detail)
        elif n.msg_type == 'grpmsg_reply':
            grpmsg_reply_list.append(n.detail)

    # my groups
    groups = ccnet_threaded_rpc.get_groups(email)
    groups_manage = []
    groups_join = []
    for group in groups:
        if str(group.id) in grpmsg_list:
            group.new_msg = True
        else:
            group.new_msg = False
        if group.props.creator_name == request.user.username:
            groups_manage.append(group)
        else:
            groups_join.append(group)
    
    # get nickname
    if not Profile.objects.filter(user=request.user.username):
        nickname = ''
    else:
        profile = Profile.objects.filter(user=request.user.username)[0]
        nickname = profile.nickname

    return render_to_response('myhome.html', {
            "myname": email,
            "nickname": nickname,
            "owned_repos": owned_repos,
            "quota_usage": quota_usage,
            "in_repos": in_repos,
            "contacts": contacts,
            "groups": groups,
            "grpmsg_reply_list": grpmsg_reply_list,
            "groups_manage": groups_manage,
            "groups_join": groups_join,
            }, context_instance=RequestContext(request))

@login_required
def ownerhome(request, owner_name):
    owned_repos = []
    quota_usage = 0

    owned_repos = seafserv_threaded_rpc.list_owned_repos(owner_name)
    quota_usage = seafserv_threaded_rpc.get_user_quota_usage(owner_name)

    user_dict = user_info(request, owner_name)
    
    return render_to_response('ownerhome.html', {
            "owned_repos": owned_repos,
            "quota_usage": quota_usage,
            "owner": owner_name,
            "user_dict": user_dict,
            }, context_instance=RequestContext(request))

@login_required
def repo_set_access_property(request, repo_id):
    ap = request.GET.get('ap', '')
    seafserv_threaded_rpc.repo_set_access_property(repo_id, ap)
        
    return HttpResponseRedirect(reverse('repo', args=[repo_id]))

@login_required    
def repo_del_file(request, repo_id):
    parent_dir = request.GET.get("p", "/")
    file_name = request.GET.get("file_name")
    user = request.user.username
    try:
        seafserv_threaded_rpc.del_file(repo_id, parent_dir,file_name, user)
    except Exception, e:
        pass

    url = reverse('repo', args=[repo_id]) + ('?p=%s' % parent_dir)
    return HttpResponseRedirect(url)

def repo_view_file(request, repo_id, obj_id):
    http_server_root = get_httpserver_root()
    filename = urllib2.quote(request.GET.get('file_name', '').encode('utf-8'))
    commit_id = request.GET.get('commit_id', '')
    view_history = True if commit_id else False
    current_commit = seafserv_rpc.get_commit(commit_id)
    if not current_commit:
        current_commit = get_commits(repo_id, 0, 1)[0]

    if request.is_ajax():
        content_type = 'application/json; charset=utf-8'
        token = request.GET.get('t')
        tmp_str = '%s/access?repo_id=%s&id=%s&filename=%s&op=%s&t=%s&u=%s'
        redirect_url = tmp_str % (http_server_root,
                                  repo_id, obj_id,
                                  filename, 'view', 
                                  token,
                                  request.user.username)
        try:
            proxied_request = urllib2.urlopen(redirect_url)
            if long(proxied_request.headers['Content-Length']) > FILE_PREVIEW_MAX_SIZE:
                data = json.dumps([{'error': '文件超过10M，无法在线查看。'}])
                return HttpResponse(data, status=400, content_type=content_type)
            else:
                content = proxied_request.read()
        except urllib2.HTTPError, e:
            err = 'HTTPError: 无法在线打开该文件'
            data = json.dumps([{'error': err}])
            return HttpResponse(data, status=400, content_type=content_type)
        except urllib2.URLError as e:
            err = 'URLError: 无法在线打开该文件'
            data = json.dumps([{'error': err}])
            return HttpResponse(data, status=400, content_type=content_type)
        else:
            l, d = [], {}
            try:
                # XXX: file in windows is encoded in gbk
                u_content = content.decode('gbk')                
            except:
                u_content = content.decode('utf-8')
            from django.utils.html import escape
            d['content'] = re.sub("\r\n|\n", "<br />", escape(u_content))
            l.append(d)
            data = json.dumps(l)
            return HttpResponse(data, status=200, content_type=content_type)
    
    repo = get_repo(repo_id)
    if not repo:
        raise Http404

    # if a repo doesn't have access property in db, then assume it's 'own'
    repo_ap = seafserv_threaded_rpc.repo_query_access_property(repo_id)
    if not repo_ap:
        repo_ap = 'own'

    # if a repo is shared to me, then I can view and download file no mater whether
    # repo's access property is 'own' or 'public'
    if check_shared_repo(request, repo_id):
        share_to_me = True
    else:
        share_to_me = False
            
    token = ''        
    if repo_ap == 'own':
        # people who is owner or this repo is shared to him, can visit the repo;
        # others, just go to 404 page           
        if validate_owner(request, repo_id) or share_to_me:
            # owner should get a token to visit repo                
            token = gen_token()
            # put token into memory in seaf-server
            seafserv_rpc.web_save_access_token(token, obj_id)
        else:
            raise Http404

    # query commit info
    commit_id = request.GET.get('commit_id', None)
    current_commit = seafserv_rpc.get_commit(commit_id)
    if not current_commit:
        current_commit = get_commits(repo.id, 0, 1)[0]
        
    # generate path and link
    path = request.GET.get('p', '/')
    if path[-1] != '/':
        path = path + '/'
    zipped = gen_path_link(path, repo.name)

    # filename
    can_preview, filetype = valid_previewed_file(filename)

    # raw path
    tmp_str = '%s/access?repo_id=%s&id=%s&filename=%s&op=%s&t=%s&u=%s'
    raw_path = tmp_str % (http_server_root,
                          repo_id, obj_id,
                          filename, 'view', 
                          token,
                          request.user.username)
    
    return render_to_response('repo_view_file.html', {
            'repo': repo,
            'obj_id': obj_id,
            'file_name': filename,
            'zipped': zipped,
            'view_history': view_history,
            'current_commit': current_commit,
            'token': token,
            'can_preview': can_preview,
            'filetype': filetype,
            'raw_path': raw_path,
            }, context_instance=RequestContext(request))
 
def repo_access_file(request, repo_id, obj_id):
    if repo_id:
        repo = get_repo(repo_id)
        if not repo:
            raise Http404

        password_set = False
        if repo.props.encrypted:
            try:
                ret = seafserv_rpc.is_passwd_set(repo_id, request.user.username)
                if ret == 1:
                    password_set = True
            except SearpcError, e:
                return go_error(request, e.msg)

        if repo.props.encrypted and not password_set:
            return HttpResponseRedirect(reverse('repo', args=[repo_id]))

        op = request.GET.get('op', 'view')
        file_name = request.GET.get('file_name', '')

        if op == 'del':
            return repo_del_file(request, repo_id)

        # if a repo doesn't have access property in db, then assume it's 'own'
        repo_ap = seafserv_threaded_rpc.repo_query_access_property(repo_id)
        if not repo_ap:
            repo_ap = 'own'

        # if a repo is shared to me, then I can view and download file no mater whether
        # repo's access property is 'own' or 'public'
        if check_shared_repo(request, repo_id):
            share_to_me = True
        else:
            share_to_me = False
            
        token = ''        
        if repo_ap == 'own':
            # people who is owner or this repo is shared to him, can visit the repo;
            # others, just go to 404 page           
            if validate_owner(request, repo_id) or share_to_me:
                # owner should get a token to visit repo                
                token = gen_token()
                # put token into memory in seaf-server
                seafserv_rpc.web_save_access_token(token, obj_id)
            else:
                raise Http404

        http_server_root = get_httpserver_root()

        redirect_url = '%s/access?repo_id=%s&id=%s&filename=%s&op=%s&t=%s&u=%s' % (http_server_root,
                                                                             repo_id, obj_id,
                                                                             file_name, op, 
                                                                             token,
                                                                             request.user.username)
        return HttpResponseRedirect(redirect_url)
 
@login_required
def repo_download(request):
    repo_id = request.GET.get('repo_id', '')

    repo = seafserv_threaded_rpc.get_repo(repo_id)    
    repo_name = repo.props.name
    quote_repo_name = quote(repo_name.encode('utf-8'))
    encrypted = repo.props.encrypted
    if encrypted:
        enc = '1'
    else:
        enc = ''
    relay_id = ccnet_rpc.get_session_info().id
    if not relay_id:
        return render_to_response('error.html', {
                "error_msg": u"下载失败：无法取得中继"
                }, context_instance=RequestContext(request))

    ccnet_applet_root = get_ccnetapplet_root()
    redirect_url = "%s/repo/download/?repo_id=%s&relay_id=%s&repo_name=%s&encrypted=%s" % (
        ccnet_applet_root, repo_id, relay_id, quote_repo_name, enc)

    return HttpResponseRedirect(redirect_url)

@login_required    
def file_move(request):
    src_repo_id = request.POST.get('src_repo')
    src_path    = request.POST.get('src_path')
    dst_repo_id = request.POST.get('dst_repo')
    dst_path    = request.POST.get('dst_path')
    obj_name    = request.POST.get('obj_name')
    obj_type    = request.POST.get('obj_type') # dir or file
    op          = request.POST.get('operation')

    if not (src_repo_id and src_path and dst_repo_id \
            and dst_path and obj_name and obj_type and op):
        return go_error(request)

    # do nothing when dst is the same as src
    if src_repo_id == dst_repo_id and src_path == dst_path:
        url = reverse('repo', args=[src_repo_id]) + ('?p=%s' % src_path)
        return HttpResponseRedirect(url)

    # Error when moving/copying a dir to its subdir
    if obj_type == 'dir':
        src_dir = os.path.join(src_path, obj_name)
        if dst_path.startswith(src_dir):
            error_msg = u"不能把目录 %s %s到它的子目录 %s" \
                        % (src_dir, u"复制" if op == 'cp' else u"移动", dst_path)
            return go_error(request, error_msg)

    new_obj_name = check_filename_with_rename(dst_repo_id, dst_path, obj_name)

    try:
        if op == 'cp':
            seafserv_threaded_rpc.copy_file (src_repo_id, src_path, obj_name,
                                             dst_repo_id, dst_path, new_obj_name,
                                             request.user.username)
        elif op == 'mv':
            seafserv_threaded_rpc.move_file (src_repo_id, src_path, obj_name,
                                             dst_repo_id, dst_path, new_obj_name,
                                             request.user.username)
    except Exception, e:
        return go_error(request, str(e))

    url = reverse('repo', args=[src_repo_id]) + ('?p=%s' % src_path)

    return HttpResponseRedirect(url)

        

def seafile_access_check(request):
    repo_id = request.GET.get('repo_id', '')
    applet_root = get_ccnetapplet_root()
    
    return render_to_response(
        'seafile_access_check.html', {
            'repo_id': repo_id,
            'applet_root': applet_root,
        },
        context_instance=RequestContext(request))

@login_required
def repo_remove_share(request):
    """
    If repo is shared from one person to another person, only these two peson
    can remove share.
    If repo is shared from one person to a group, then only the one share the
    repo and group staff can remove share.
    """
    repo_id = request.GET.get('repo_id', '')
    group_id = request.GET.get('gid')
    from_email = request.GET.get('from', '')
    
    # if request params don't have 'gid', then remove repos that share to
    # to other person; else, remove repos that share to groups
    if not group_id:
        to_email = request.GET.get('to', '')
        if request.user.username != from_email and \
                request.user.username != to_email:
            return go_permission_error(request, u'取消共享失败')
        seafserv_threaded_rpc.remove_share(repo_id, from_email, to_email)
    else:
        try:
            group_id_int = int(group_id)
        except:
            return go_error(request, u'group id 不是有效参数')

        if not check_group_staff(group_id_int, request.user) \
                and request.user.username != from_email: 
            return go_permission_error(request, u'取消共享失败')        
        from seahub.group.views import group_unshare_repo
        group_unshare_repo(request, repo_id, group_id_int, from_email)

    referer = request.META.get('HTTP_REFERER', None)
    if not referer:
        referer = 'share_admin'
        return HttpResponseRedirect(reverse(referer))
    else:
        return HttpResponseRedirect(referer)
    
@login_required
def mypeers(request):
    cid = get_user_cid(request.user)

@login_required
def sys_seafadmin(request):
    if not request.user.is_staff:
        raise Http404

    # Make sure page request is an int. If not, deliver first page.
    try:
        current_page = int(request.GET.get('page', '1'))
        per_page= int(request.GET.get('per_page', '25'))
    except ValueError:
        current_page = 1
        per_page = 25

    repos_all = seafserv_threaded_rpc.get_repo_list(per_page *
                                                    (current_page -1),
                                                    per_page + 1)
        
    repos = repos_all[:per_page]

    if len(repos_all) == per_page + 1:
        page_next = True
    else:
        page_next = False

    for repo in repos:
        try:
            repo.owner = seafserv_threaded_rpc.get_repo_owner(repo.props.id)
        except:
            repo.owner = None
            
    return render_to_response(
        'sys_seafadmin.html', {
            'repos': repos,
            'current_page': current_page,
            'prev_page': current_page-1,
            'next_page': current_page+1,
            'per_page': per_page,
            'page_next': page_next,
        },
        context_instance=RequestContext(request))

@login_required
def org_seafadmin(request):
    if not request.user.org:
        raise Http404

    # Make sure page request is an int. If not, deliver first page.
    try:
        current_page = int(request.GET.get('page', '1'))
        per_page= int(request.GET.get('per_page', '25'))
    except ValueError:
        current_page = 1
        per_page = 25

    repos_all = seafserv_threaded_rpc.get_org_repo_list(request.user.org.org_id,
                                                        per_page * (current_page -1),
                                                        per_page + 1)
        
    repos = repos_all[:per_page]

    if len(repos_all) == per_page + 1:
        page_next = True
    else:
        page_next = False

    for repo in repos:
        try:
            repo.owner = seafserv_threaded_rpc.get_repo_owner(repo.props.id)
        except:
            repo.owner = None
            
    return render_to_response(
        'org_seafadmin.html', {
            'repos': repos,
            'current_page': current_page,
            'prev_page': current_page-1,
            'next_page': current_page+1,
            'per_page': per_page,
            'page_next': page_next,
        },
        context_instance=RequestContext(request))

@login_required
def sys_useradmin(request):
    if not request.user.is_staff:
        raise Http404

    users = ccnet_threaded_rpc.get_emailusers(-1,-1)
        
    for user in users:
        if user.props.id == request.user.id:
            user.is_self = True
        # TODO: may add new is_org_user rpc
        user.is_org_user = True if ccnet_threaded_rpc.get_org_by_user(user.email) else False
            
    return render_to_response(
        'sys_useradmin.html', {
            'users': users,
        },
        context_instance=RequestContext(request))

@login_required
def org_useradmin(request):
    if not request.user.org.is_staff:
        raise Http404

    users = ccnet_threaded_rpc.get_org_emailusers(request.user.org.url_prefix,
                                         0, sys.maxint)
        
    for user in users:
        if user.props.id == request.user.id:
            user.is_self = True
            user.is_org_user = True
            
    return render_to_response(
        'org_useradmin.html', {
            'users': users,
        },
        context_instance=RequestContext(request))

@login_required
def user_info(request, email):
    if request.user.username == email:
        return HttpResponseRedirect(reverse(myhome))
    
    if not request.user.is_staff and not request.user.org.is_staff:
        return go_permission_error(request, u'权限不足：无法查看该用户信息')

#    user_dict = {}
    owned_repos = []
    quota_usage = 0

    owned_repos = seafserv_threaded_rpc.list_owned_repos(email)
    quota_usage = seafserv_threaded_rpc.get_user_quota_usage(email)

#    try:
#        peers = ccnet_threaded_rpc.get_peers_by_email(email)
#        for peer in peers:
#            if not peer:
#                continue
#            peername = peer.props.name
#            roles = peer.props.role_list
#            user_dict[peername] = roles
#    except:
#        pass

    # Repos that are share to user
    in_repos = seafserv_threaded_rpc.list_share_repos(email, 'to_email', -1, -1)

    return render_to_response(
        'userinfo.html', {
            'owned_repos': owned_repos,
            'quota_usage': quota_usage,
            "in_repos": in_repos,
#            'user_dict': user_dict,
            'email': email
            },
        context_instance=RequestContext(request))

#@login_required
#def role_add(request, user_id):
#    if not request.user.is_staff:
#        raise Http404
# 
#    if request.method == 'POST':
#        role = request.POST.get('role', '')
#        if role and len(role) <= 16:
#            ccnet_rpc.add_role(user_id, role)
# 
#    return HttpResponseRedirect(request.META['HTTP_REFERER'])

#@login_required
#def role_remove(request, user_id):
#    if not request.user.is_staff:
#        raise Http404
# 
#    role = request.REQUEST.get('role', '')
#    if role and len(role) <= 16:
#        ccnet_rpc.remove_role(user_id, role)
# 
#    return HttpResponseRedirect(request.META['HTTP_REFERER'])

@login_required
def user_remove(request, user_id):
    """The user id is emailuser id."""
    
    if not request.user.is_staff and not request.user.org.is_staff:
        raise Http404

    ccnetuser = get_ccnetuser(userid=int(user_id))
    if ccnetuser.org:
        ccnet_threaded_rpc.remove_org_user(ccnetuser.org.org_id, ccnetuser.username)
    ccnetuser.delete()

    if request.user.is_staff:
        return HttpResponseRedirect(reverse('sys_useradmin'))
    else:
        return HttpResponseRedirect(reverse('org_useradmin'))

@login_required
def activate_user(request, user_id):
    """The user id is emailuser id."""

    if not request.user.is_staff:
        raise Http404

    ccnetuser = get_ccnetuser(userid=int(user_id))
    ccnetuser.is_active = True
    ccnetuser.save()

    return HttpResponseRedirect(reverse('useradmin'))

def send_user_add_mail(request, email, password):
    """ Send email when add new user """
    
    use_https = request.is_secure()
    domain = RequestSite(request).domain
    
    t = loader.get_template('user_add_email.html')
    c = {
        'user': request.user.username,
        'org': request.user.org,
        'email': email,
        'password': password,
        'domain': domain,
        'protocol': use_https and 'https' or 'http',
        }
    try:
        send_mail(u'SeaCloud注册信息', t.render(Context(c)),
                  None, [email], fail_silently=False)
        messages.add_message(request, messages.INFO, email)
    except:
        messages.add_message(request, messages.ERROR, email)

@login_required
def user_add(request):
    """Add a user"""

    if not request.user.is_staff and not request.user.org.is_staff:
        raise Http404

    base_template = 'org_admin_base.html' if request.user.org else 'admin_base.html'
    
    if request.method == 'POST':
        form = AddUserForm(request.POST)
        if form.is_valid():
            email = form.cleaned_data['email']
            password = form.cleaned_data['password1']

            ccnetuser = CcnetUser(username=email, raw_password=password)
            ccnetuser.is_active = True
            ccnetuser.save()
            
            if request.user.org:
                org_id = request.user.org.org_id
                ccnet_threaded_rpc.add_org_user(org_id, email, 0)
                if hasattr(settings, 'EMAIL_HOST'):
                    send_user_add_mail(request, email, password)
                    
                return HttpResponseRedirect(reverse('org_useradmin'))
            else:
                if hasattr(settings, 'EMAIL_HOST'):
                    send_user_add_mail(request, email, password)
                
                return HttpResponseRedirect(reverse('sys_useradmin', args=[]))
    else:
        form = AddUserForm()
    
    return render_to_response("add_user_form.html",  {
            'form': form,
            'base_template': base_template,
            }, context_instance=RequestContext(request))

def back_local(request):
    ccnet_applt_root = get_ccnetapplet_root()

    redirect_url = '%s/home/' % ccnet_applt_root

    return HttpResponseRedirect(redirect_url)

def sys_group_admin(request):
    if not request.user.is_staff:
        raise Http404

    # Make sure page request is an int. If not, deliver first page.
    try:
        current_page = int(request.GET.get('page', '1'))
        per_page= int(request.GET.get('per_page', '25'))
    except ValueError:
        current_page = 1
        per_page = 25

    groups_plus_one = ccnet_threaded_rpc.get_all_groups(per_page * (current_page -1),
                                               per_page +1)
        
    groups = groups_plus_one[:per_page]

    if len(groups_plus_one) == per_page + 1:
        page_next = True
    else:
        page_next = False

    return render_to_response('sys_group_admin.html', {
            'groups': groups,
            'current_page': current_page,
            'prev_page': current_page-1,
            'next_page': current_page+1,
            'per_page': per_page,
            'page_next': page_next,
            }, context_instance=RequestContext(request))

def sys_org_admin(request):
    if not request.user.is_staff:
        raise Http404

    orgs = ccnet_threaded_rpc.get_all_orgs(0, sys.maxint)

    return render_to_response('sys_org_admin.html', {
            'orgs': orgs,
            }, context_instance=RequestContext(request))
    
def org_group_admin(request):
    if not request.user.is_staff and not request.user.org.is_staff:
        raise Http404

    # Make sure page request is an int. If not, deliver first page.
    try:
        current_page = int(request.GET.get('page', '1'))
        per_page= int(request.GET.get('per_page', '25'))
    except ValueError:
        current_page = 1
        per_page = 25

    groups_plus_one = ccnet_threaded_rpc.get_org_groups (request.user.org.org_id,
                                                per_page * (current_page -1),
                                                per_page +1)
        
    groups = groups_plus_one[:per_page]

    if len(groups_plus_one) == per_page + 1:
        page_next = True
    else:
        page_next = False

    return render_to_response('org_group_admin.html', {
            'groups': groups,
            'current_page': current_page,
            'prev_page': current_page-1,
            'next_page': current_page+1,
            'per_page': per_page,
            'page_next': page_next,
            }, context_instance=RequestContext(request))

def org_remove(request, org_id):
    if not request.user.is_staff:
        raise Http404

    try:
        org_id_int = int(org_id)
    except ValueError:
        return HttpResponseRedirect(reverse('sys_org_admin'))

    # Remove repos in that org
    seafserv_threaded_rpc.remove_org_repo_by_org_id(org_id_int)
    
    # TODO: Remove repos in org's groups
    
    ccnet_threaded_rpc.remove_org(org_id_int)
    
    return HttpResponseRedirect(reverse('sys_org_admin'))

@login_required
def org_info(request):
    if not request.user.org:
        raise Http404

    org = request.user.org
    
    org_members = ccnet_threaded_rpc.get_org_emailusers(org.url_prefix, 0, sys.maxint)
    for member in org_members:
        member.short_username = member.email.split('@')[0]

    groups = ccnet_threaded_rpc.get_org_groups(org.org_id, 0, sys.maxint)
    
    return render_to_response('org_info.html', {
            'org': org,
            'org_users': org_members,
            'groups': groups,
            }, context_instance=RequestContext(request))

@login_required    
def file_upload_progress(request):
    """
    Return JSON object with information about the progress of an upload.
    """
    progress_id = None
    if 'X-Progress-ID' in request.GET:
        progress_id = request.GET['X-Progress-ID']
    elif 'X-Progress-ID' in request.META:
        progress_id = request.META['X-Progress-ID']

    if progress_id:
        cache_key = "%s_%s" % (request.user.username, progress_id)
        data = cache.get(cache_key)
        return HttpResponse(json.dumps(data))
    else:
        return HttpResponseServerError('Server Error: You must provide X-Progress-ID header or query param.')

@login_required
def file_upload_progress_page(request):
    '''
    As iframe in repo_upload_file.html, for solving problem in chrome.

    '''
    uuid = request.GET.get('uuid', '')

    return render_to_response('file_upload_progress_page.html', {
        'uuid': uuid,
            }, context_instance=RequestContext(request))

@login_required        
def repo_new_dir(request):        
    repo_id         = request.POST.get("repo_id")
    parent_dir      = request.POST.get("parent_dir")
    new_dir_name    = request.POST.get("new_dir_name")
    user            = request.user.username

    if not new_dir_name:
        error_msg = u"请输入新目录名"
        return go_error(request, error_msg)

    if not (repo_id and parent_dir and user):
        return go_error(request)

    if len(new_dir_name) > settings.MAX_UPLOAD_FILE_NAME_LEN:
        error_msg = u"您输入的目录名称过长"
        return go_error (request, error_msg)

    try:
        if not seafserv_threaded_rpc.is_valid_filename(repo_id, new_dir_name):
            error_msg = (u"您输入的目录名称 %s 包含非法字符" % new_dir_name)
            return go_error (request, error_msg)
    except SearpcError,e:
            return go_error (request, e.msg)

    new_dir_name = check_filename_with_rename(repo_id, parent_dir, new_dir_name)

    try:
        seafserv_threaded_rpc.put_dir(repo_id, parent_dir, new_dir_name, user)
    except Exception, e:
        return go_error(request, str(e))
        
    url = reverse('repo', args=[repo_id]) + ('?p=%s' % parent_dir)
    return HttpResponseRedirect(url)

@login_required    
def repo_rename_file(request):
    repo_id         = request.POST.get("repo_id")
    parent_dir      = request.POST.get("parent_dir")
    oldname         = request.POST.get("oldname")
    newname         = request.POST.get("newname")
    user            = request.user.username

    # print repo_id, parent_dir, oldname, newname, user

    if not newname:
        error_msg = u"新文件名不能为空"
        return go_error(request, error_msg)

    if len(newname) > settings.MAX_UPLOAD_FILE_NAME_LEN:
        error_msg = u"新文件名太长"
        return go_error(request, error_msg)

    if not (repo_id and parent_dir and oldname):
        return go_error(request)

    try:
        seafserv_threaded_rpc.rename_file (repo_id, parent_dir,
                                           oldname, newname, user)
    except Exception, e:
        return go_error(request, str(e))

    url = reverse('repo', args=[repo_id]) + ('?p=%s' % parent_dir)
    return HttpResponseRedirect(url)

@login_required    
def validate_filename(request):
    repo_id     = request.GET.get('repo_id')
    filename    = request.GET.get('filename')

    if not (repo_id and filename):
        return go_error(request)

    result = {'ret':'yes'}

    try:
        ret = seafserv_threaded_rpc.is_valid_filename (repo_id, filename);
    except SearpcError:
        result['ret'] = 'error'
    else:
        result['ret'] = 'yes' if ret == 1 else 'no'

    content_type = 'application/json; charset=utf-8'
    return HttpResponse(json.dumps(result), content_type=content_type)