import React, { Fragment } from 'react';
import PropTypes from 'prop-types';
import cookie from 'react-cookies';
import { gettext, username, canAddRepo } from '../../utils/constants';
import { seafileAPI } from '../../utils/seafile-api';
import { Utils } from '../../utils/utils';
import Loading from '../../components/loading';
import EmptyTip from '../../components/empty-tip';
import ModalPortal from '../../components/modal-portal';
import Group from '../../models/group';
import Repo from '../../models/repo';
import toaster from '../../components/toast';
import CreateRepoDialog from '../../components/dialog/create-repo-dialog';
import GroupMembersDialog from '../../components/dialog/group-members-dialog';
import DismissGroupDialog from '../../components/dialog/dismiss-group-dialog';
import RenameGroupDialog from '../../components/dialog/rename-group-dialog';
import TransferGroupDialog from '../../components/dialog/transfer-group-dialog';
import ImportMembersDialog from '../../components/dialog/import-members-dialog';
import ManageMembersDialog from '../../components/dialog/manage-members-dialog';
import LeaveGroupDialog from '../../components/dialog/leave-group-dialog';
import SharedRepoListView from '../../components/shared-repo-list-view/shared-repo-list-view';
import SortOptionsDialog from '../../components/dialog/sort-options';
import SingleDropdownToolbar from '../../components/toolbar/single-dropdown-toolbar';

import '../../css/group-view.css';

const propTypes = {
  onGroupChanged: PropTypes.func.isRequired,
  groupID: PropTypes.string,
};

class GroupView extends React.Component {

  constructor(props) {
    super(props);
    this.state = {
      isLoading: true, // first loading
      isLoadingMore: false,
      errMessage: '',
      emptyTip: null,
      currentGroup: null,
      currentRepo: null,
      isStaff: false,
      isOwner: false,
      sortBy: cookie.load('seafile-repo-dir-sort-by') || 'name', // 'name' or 'time' or 'size'
      sortOrder: cookie.load('seafile-repo-dir-sort-order') || 'asc', // 'asc' or 'desc'
      isSortOptionsDialogOpen: false,
      repoList: [],
      currentPage: 1,
      perPage: 300,
      hasNextPage: false,
      libraryType: 'group',
      isCreateRepoDialogShow: false,
      isDepartmentGroup: false,
      showGroupDropdown: false,
      showGroupMembersPopover: false,
      showRenameGroupDialog: false,
      showDismissGroupDialog: false,
      showTransferGroupDialog: false,
      showImportMembersDialog: false,
      showManageMembersDialog: false,
      groupMembers: [],
      isLeaveGroupDialogOpen: false,
      isMembersDialogOpen: false
    };
  }

  componentDidMount() {
    let groupID = this.props.groupID;
    this.loadGroup(groupID);
  }

  UNSAFE_componentWillReceiveProps(nextProps) {
    if (nextProps.groupID !== this.props.groupID) {
      this.loadGroup(nextProps.groupID);
    }
  }

  loadGroup = (groupID) => {
    seafileAPI.getGroup(groupID).then((res) => {
      let currentGroup = new Group(res.data);
      let emptyTip = this.getEmptyTip(currentGroup);
      let isStaff = currentGroup.admins.indexOf(username) > -1; // for item operations
      let isOwner = currentGroup.owner === username ? true : false;
      let isDepartmentGroup = currentGroup.parent_group_id !== 0;
      this.setState({
        emptyTip: emptyTip,
        currentGroup: currentGroup,
        isStaff: isStaff,
        isDepartmentGroup: isDepartmentGroup,
        isOwner: isOwner,
        currentPage: 1,
        repoList: [] // empty it for the current group
      }, () => {
        this.loadRepos(this.state.currentPage);
        this.listGroupMembers();
      });
    }).catch((error) => {
      this.setState({
        isLoading: false,
        errMessage: Utils.getErrorMsg(error, true) // true: show login tip if 403
      });
    });
  };

  loadRepos = (page) => {
    const { perPage } = this.state;
    seafileAPI.listGroupRepos(this.props.groupID, page, perPage).then((res) => {
      let hasNextPage = true;
      if (res.data.length < perPage) {
        hasNextPage = false;
      }
      let repoList = this.state.repoList;
      let newRepoList = res.data.map(item => {
        let repo = new Repo(item);
        return repo;
      });
      if (newRepoList.length) {
        repoList = repoList.concat(newRepoList);
      }
      this.setState({
        isLoading: false,
        isLoadingMore: false,
        currentPage: page,
        hasNextPage: hasNextPage,
        repoList: Utils.sortRepos(repoList, this.state.sortBy, this.state.sortOrder)
      });
    }).catch((error) => {
      this.setState({
        isLoading: false,
        isLoadingMore: false,
        errMessage: Utils.getErrorMsg(error, true) // true: show login tip if 403
      });
    });
  };

  getEmptyTip = (currentGroup) => {
    let emptyTip = null;
    if (currentGroup) {
      if (currentGroup.parent_group_id === 0) {
        emptyTip = (
          <EmptyTip>
            <h2>{gettext('No libraries shared with this group')}</h2>
            <p>{gettext('No libraries have been shared with this group yet. A library shared with a group can be accessed by all group members. You can share a library with a group in "My Libraries". You can also create a new library to be shared with this group by clicking the "New Library" button in the menu bar.')}</p>
          </EmptyTip>
        );
      } else {
        if (currentGroup.admins.indexOf(username) == -1) { // is a member of this group
          emptyTip = (
            <EmptyTip>
              <h2>{gettext('No libraries')}</h2>
            </EmptyTip>
          );
        } else {
          emptyTip = (
            <EmptyTip>
              <h2>{gettext('No libraries')}</h2>
              <p>{gettext('You can create libraries by clicking the "New Library" button above.')}</p>
            </EmptyTip>
          );
        }
      }
    }
    return emptyTip;
  };

  onCreateRepoToggle = () => {
    this.setState({ isCreateRepoDialogShow: !this.state.isCreateRepoDialogShow });
  };

  onCreateRepo = (repo, groupOwnerType) => {
    let groupId = this.props.groupID;
    if (groupOwnerType && groupOwnerType === 'department') {
      seafileAPI.createGroupOwnedLibrary(groupId, repo).then(res => { // need modify endpoint api
        let object = {
          repo_id: res.data.id,
          repo_name: res.data.name,
          owner_name: res.data.group_name,
          owner_email: res.data.owner,
          permission: res.data.permission,
          mtime: res.data.mtime,
          size: res.data.size,
          encrypted: res.data.encrypted,
        };
        let repo = new Repo(object);
        let repoList = this.addRepoItem(repo);
        this.setState({ repoList: repoList });
      }).catch(error => {
        let errMessage = Utils.getErrorMsg(error);
        toaster.danger(errMessage);
      });

    } else {
      seafileAPI.createGroupRepo(groupId, repo).then(res => {
        let repo = new Repo(res.data);
        let repoList = this.addRepoItem(repo);
        this.setState({ repoList: repoList });
      }).catch(error => {
        let errMessage = Utils.getErrorMsg(error);
        toaster.danger(errMessage);
      });
    }
    this.onCreateRepoToggle();
  };

  onItemDelete = (repo) => {
    let groupID = this.props.groupID;
    let repoList = this.state.repoList.filter(item => {
      return item.repo_id !== repo.repo_id;
    });
    this.setState({ repoList: repoList });
    this.loadGroup(groupID);
  };

  addRepoItem = (repo) => {
    let newRepoList = this.state.repoList.map(item => {return item;});
    newRepoList.unshift(repo);
    return newRepoList;
  };

  onItemUnshare = (repo) => {
    let group = this.state.currentGroup;
    seafileAPI.unshareRepoToGroup(repo.repo_id, group.id).then(() => {
      let repoList = this.state.repoList.filter(item => {
        return item.repo_id !== repo.repo_id;
      });
      this.setState({ repoList: repoList });
      this.loadGroup(group.id);
    }).catch(error => {
      let errMessage = Utils.getErrorMsg(error);
      toaster.danger(errMessage);
    });
  };

  onItemRename = (repo, newName) => {
    seafileAPI.renameGroupOwnedLibrary(this.props.groupID, repo.repo_id, newName).then(res => {
      let repoList = this.state.repoList.map(item => {
        if (item.repo_id === repo.repo_id) {
          item.repo_name = newName;
        }
        return item;
      });
      this.setState({ repoList: repoList });
    }).catch(error => {
      let errMessage = Utils.getErrorMsg(error);
      toaster.danger(errMessage);
    });
  };

  onMonitorRepo = (repo, monitored) => {
    let repoList = this.state.repoList.map(item => {
      if (item.repo_id === repo.repo_id) {
        item.monitored = monitored;
      }
      return item;
    });
    this.setState({ repoList: repoList });
  };

  toggleDismissGroupDialog = () => {
    this.setState({
      showDismissGroupDialog: !this.state.showDismissGroupDialog,
      showGroupDropdown: false,
    });
  };

  toggleRenameGroupDialog = () => {
    this.setState({
      showRenameGroupDialog: !this.state.showRenameGroupDialog,
      showGroupDropdown: false,
    });
  };

  toggleTransferGroupDialog = () => {
    this.setState({
      showTransferGroupDialog: !this.state.showTransferGroupDialog,
      showGroupDropdown: false,
    });
  };

  toggleImportMembersDialog = () => {
    this.setState({
      showImportMembersDialog: !this.state.showImportMembersDialog
    });
  };

  importMembersInBatch = (file) => {
    toaster.notify(gettext('It may take some time, please wait.'));
    seafileAPI.importGroupMembersViaFile(this.state.currentGroup.id, file).then((res) => {
      res.data.failed.forEach(item => {
        const msg = `${item.email}: ${item.error_msg}`;
        toaster.danger(msg);
      });
    }).catch((error) => {
      let errMsg = Utils.getErrorMsg(error);
      toaster.danger(errMsg);
    });
  };

  toggleManageMembersDialog = () => {
    this.setState({
      showManageMembersDialog: !this.state.showManageMembersDialog,
      showGroupDropdown: false,
    });
  };

  toggleLeaveGroupDialog = () => {
    this.setState({
      isLeaveGroupDialogOpen: !this.state.isLeaveGroupDialogOpen,
      showGroupDropdown: false,
    });
  };

  listGroupMembers = () => {
    seafileAPI.listGroupMembers(this.props.groupID).then((res) => {
      this.setState({
        groupMembers: res.data
      });
    }).catch(error => {
      let errMessage = Utils.getErrorMsg(error);
      toaster.danger(errMessage);
    });
  };

  toggleGroupMembersPopover = (state) => {
    if (state === 'open') {
      this.listGroupMembers();
      this.setState({
        showGroupMembersPopover: true
      });
    } else {
      this.setState({
        showGroupMembersPopover: false
      });
    }
  };

  sortItems = (sortBy, sortOrder) => {
    cookie.save('seafile-repo-dir-sort-by', sortBy);
    cookie.save('seafile-repo-dir-sort-order', sortOrder);
    this.setState({
      sortBy: sortBy,
      sortOrder: sortOrder,
      repoList: Utils.sortRepos(this.state.repoList, sortBy, sortOrder)
    });
  };

  translateRole = (role) => {
    if (role === 'Admin') {
      return gettext('Admin');
    }
    else if (role === 'Member') {
      return gettext('Member');
    }
    else if (role === 'Owner') {
      return gettext('Owner');
    }
  };

  toggleSortOptionsDialog = () => {
    this.setState({
      isSortOptionsDialogOpen: !this.state.isSortOptionsDialogOpen
    });
  };

  handleScroll = (event) => {
    // isLoadingMore: to avoid repeated request
    const { currentPage, hasNextPage, isLoadingMore } = this.state;
    if (hasNextPage && !isLoadingMore) {
      const clientHeight = event.target.clientHeight;
      const scrollHeight = event.target.scrollHeight;
      const scrollTop = event.target.scrollTop;
      const isBottom = (clientHeight + scrollTop + 1 >= scrollHeight);
      if (isBottom) { // scroll to the bottom
        this.setState({ isLoadingMore: true }, () => {
          this.loadRepos(currentPage + 1);
        });
      }
    }
  };

  toggleMembersDialog = () => {
    this.setState({
      isMembersDialogOpen: !this.state.isMembersDialogOpen
    });
  };

  getOpList = () => {
    const { currentGroup, isDepartmentGroup, isStaff, isOwner } = this.state;
    const opList = [];
    if ((!isDepartmentGroup && canAddRepo) ||
      (isDepartmentGroup && isStaff)) {
      opList.push({ 'text': gettext('New Library'), 'onClick': this.onCreateRepoToggle });
    }
    opList.push({ 'text': gettext('Members'), 'onClick': this.toggleMembersDialog });
    if (currentGroup) {
      if (isStaff || isOwner) {
        opList.push({ 'text': gettext('Rename'), 'onClick': this.toggleRenameGroupDialog });
        if (isOwner) {
          opList.push({ 'text': gettext('Transfer'), 'onClick': this.toggleTransferGroupDialog });
        }
        opList.push({ 'text': gettext('Import members'), 'onClick': this.toggleImportMembersDialog });
        opList.push({ 'text': gettext('Manage members'), 'onClick': this.toggleManageMembersDialog });
        if (isOwner) {
          opList.push({ 'text': gettext('Delete group'), 'onClick': this.toggleDismissGroupDialog });
        }
      }

      if (!isOwner && !isDepartmentGroup) {
        opList.push({ 'text': gettext('Leave group'), 'onClick': this.toggleLeaveGroupDialog });
      }
    }

    return opList;
  };

  render() {
    const { errMessage, emptyTip, currentGroup, isDepartmentGroup,
      groupMembers, isMembersDialogOpen
    } = this.state;

    let useRate = 0;
    if (isDepartmentGroup && currentGroup.group_quota) {
      useRate = currentGroup.group_quota_usage / currentGroup.group_quota * 100 + '%';
    }

    const opList = this.getOpList();
    return (
      <Fragment>
        <div className="main-panel-center flex-row">
          <div className="cur-view-container">
            <div className="cur-view-path">
              {currentGroup && (
                <Fragment>
                  <div className="sf-heading d-flex align-items-center">
                    {isDepartmentGroup &&
                    <span className="sf3-font-department sf3-font nav-icon" title={gettext('This is a special group representing a department.')}></span>
                    }
                    <span>{currentGroup.name}</span>
                    <SingleDropdownToolbar opList={opList} />
                  </div>
                  <div className="path-tool">
                    {isDepartmentGroup && (
                      <>
                        {currentGroup.group_quota > 0 &&
                          <div className="department-usage-container">
                            <div className="department-usage">
                              <span id="quota-bar" className="department-quota-bar"><span id="quota-usage" className="usage" style={{ width: useRate }}></span></span>
                              <span className="department-quota-info">{Utils.bytesToSize(currentGroup.group_quota_usage)} / {Utils.bytesToSize(currentGroup.group_quota)}</span>
                            </div>
                          </div>
                        }
                      </>
                    )}
                    {(!Utils.isDesktop() && this.state.repoList.length > 0) && <span className="sf3-font sf3-font-sort action-icon" onClick={this.toggleSortOptionsDialog}></span>}
                    {this.state.isSortOptionsDialogOpen &&
                    <SortOptionsDialog
                      toggleDialog={this.toggleSortOptionsDialog}
                      sortBy={this.state.sortBy}
                      sortOrder={this.state.sortOrder}
                      sortItems={this.sortItems}
                    />
                    }
                  </div>
                </Fragment>
              )}
            </div>
            <div className="cur-view-content d-block" onScroll={this.handleScroll}>
              {this.state.isLoading && <Loading />}
              {(!this.state.isLoading && errMessage) && <div className="error text-center mt-2">{errMessage}</div>}
              {(!this.state.isLoading && this.state.repoList.length === 0) && emptyTip}
              {(!this.state.isLoading && this.state.repoList.length > 0) &&
                <SharedRepoListView
                  repoList={this.state.repoList}
                  hasNextPage={this.state.hasNextPage}
                  currentGroup={this.state.currentGroup}
                  sortBy={this.state.sortBy}
                  sortOrder={this.state.sortOrder}
                  sortItems={this.sortItems}
                  onItemUnshare={this.onItemUnshare}
                  onItemDelete={this.onItemDelete}
                  onItemRename={this.onItemRename}
                  onMonitorRepo={this.onMonitorRepo}
                />
              }
            </div>
          </div>
        </div>
        {this.state.isCreateRepoDialogShow && !this.state.isDepartmentGroup && (
          <ModalPortal>
            <CreateRepoDialog
              libraryType={this.state.libraryType}
              onCreateToggle={this.onCreateRepoToggle}
              onCreateRepo={this.onCreateRepo}
            />
          </ModalPortal>
        )}
        {this.state.isCreateRepoDialogShow && this.state.isDepartmentGroup &&
          <CreateRepoDialog
            onCreateToggle={this.onCreateRepoToggle}
            onCreateRepo={this.onCreateRepo}
            libraryType='department'
          />
        }
        {isMembersDialogOpen &&
        <GroupMembersDialog
          members={groupMembers}
          toggleDialog={this.toggleMembersDialog}
        />
        }
        {this.state.showRenameGroupDialog &&
          <RenameGroupDialog
            showRenameGroupDialog={this.state.showRenameGroupDialog}
            toggleRenameGroupDialog={this.toggleRenameGroupDialog}
            loadGroup={this.loadGroup}
            groupID={this.props.groupID}
            onGroupChanged={this.props.onGroupChanged}
            currentGroupName={currentGroup.name}
          />
        }
        {this.state.showDismissGroupDialog &&
          <DismissGroupDialog
            showDismissGroupDialog={this.state.showDismissGroupDialog}
            toggleDismissGroupDialog={this.toggleDismissGroupDialog}
            loadGroup={this.loadGroup}
            groupID={this.props.groupID}
            onGroupChanged={this.props.onGroupChanged}
          />
        }
        {this.state.showTransferGroupDialog &&
          <TransferGroupDialog
            toggleTransferGroupDialog={this.toggleTransferGroupDialog}
            groupID={this.props.groupID}
            onGroupChanged={this.props.onGroupChanged}
          />
        }
        { this.state.showImportMembersDialog &&
          <ImportMembersDialog
            toggleImportMembersDialog={this.toggleImportMembersDialog}
            importMembersInBatch={this.importMembersInBatch}
          />
        }
        {this.state.showManageMembersDialog &&
          <ManageMembersDialog
            toggleManageMembersDialog={this.toggleManageMembersDialog}
            groupID={this.props.groupID}
            onGroupChanged={this.props.onGroupChanged}
            isOwner={this.state.isOwner}
          />
        }
        {this.state.isLeaveGroupDialogOpen &&
          <LeaveGroupDialog
            toggleLeaveGroupDialog={this.toggleLeaveGroupDialog}
            groupID={this.props.groupID}
            onGroupChanged={this.props.onGroupChanged}
          />
        }
      </Fragment>
    );
  }
}

GroupView.propTypes = propTypes;

export default GroupView;