package config

import (
	"io/ioutil"
	"strings"

	"github.com/burmilla/os/config/cmdline"
	"github.com/burmilla/os/pkg/util"
	yaml "github.com/cloudfoundry-incubator/candiedyaml"
)

const Banner = `
    ____                       _ _ _        ____   _____
   |  _ \\                     (_) | |      / __ \\ / ____|
   | |_) |_   _ _ __ _ __ ___  _| | | __ _| |  | | (___
   |  _ <| | | | '__| '_ ' _ \\| | | |/ _' | |  | |\\___ \\
   | |_) | |_| | |  | | | | | | | | | (_| | |__| |____) |
   |____/ \\__,_|_|  |_| |_| |_|_|_|_|\\__,_|\\____/|_____/

         BurmillaOS \v \n \l
         `

func Merge(bytes []byte) error {
	data, err := readConfigs(bytes, false, true)
	if err != nil {
		return err
	}
	existing, err := readConfigs(nil, false, true, CloudConfigFile)
	if err != nil {
		return err
	}
	return WriteToFile(util.Merge(existing, data), CloudConfigFile)
}

func Export(private, full bool) (string, error) {
	rawCfg := loadRawConfig("", full)
	rawCfg = filterAdditional(rawCfg)
	if !private {
		rawCfg = filterPrivateKeys(rawCfg)
	}

	bytes, err := yaml.Marshal(rawCfg)
	return string(bytes), err
}
func filterPrivateKeys(data map[interface{}]interface{}) map[interface{}]interface{} {
	for _, privateKey := range PrivateKeys {
		_, data = filterKey(data, strings.Split(privateKey, "."))
	}

	return data
}

func filterAdditional(data map[interface{}]interface{}) map[interface{}]interface{} {
	for _, additional := range Additional {
		_, data = filterKey(data, strings.Split(additional, "."))
	}

	return data
}

func Get(key string) (interface{}, error) {
	cfg := LoadConfig()

	data := map[interface{}]interface{}{}
	if err := util.ConvertIgnoreOmitEmpty(cfg, &data); err != nil {
		return nil, err
	}

	v, _ := cmdline.GetOrSetVal(key, data, nil)
	return v, nil
}

func Set(key string, value interface{}) error {
	existing, err := readConfigs(nil, false, true, CloudConfigFile)
	if err != nil {
		return err
	}

	_, modified := cmdline.GetOrSetVal(key, existing, value)

	c := &CloudConfig{}
	if err = util.Convert(modified, c); err != nil {
		return err
	}

	return WriteToFile(modified, CloudConfigFile)
}

func GetKernelVersion() string {
	b, err := ioutil.ReadFile("/proc/version")
	if err != nil {
		return ""
	}
	elem := strings.Split(string(b), " ")
	return elem[2]
}