import { isSignupAllowed, isSignupAllowedForCurrentIP } from '@server/helpers/signup'
import { getServerCommit } from '@server/helpers/utils'
import { CONFIG, isEmailEnabled } from '@server/initializers/config'
import { CONSTRAINTS_FIELDS, DEFAULT_THEME_NAME, PEERTUBE_VERSION } from '@server/initializers/constants'
import { HTMLServerConfig, RegisteredExternalAuthConfig, RegisteredIdAndPassAuthConfig, ServerConfig } from '@shared/models'
import { Hooks } from './plugins/hooks'
import { PluginManager } from './plugins/plugin-manager'
import { getThemeOrDefault } from './plugins/theme-utils'
import { VideoTranscodingProfilesManager } from './transcoding/video-transcoding-profiles'

async function getServerConfig (ip?: string): Promise<ServerConfig> {
  const { allowed } = await Hooks.wrapPromiseFun(
    isSignupAllowed,
    {
      ip
    },
    'filter:api.user.signup.allowed.result'
  )

  const allowedForCurrentIP = isSignupAllowedForCurrentIP(ip)

  const signup = {
    allowed,
    allowedForCurrentIP,
    requiresEmailVerification: CONFIG.SIGNUP.REQUIRES_EMAIL_VERIFICATION
  }

  const htmlConfig = await getHTMLServerConfig()

  return { ...htmlConfig, signup }
}

// Config injected in HTML
let serverCommit: string
async function getHTMLServerConfig (): Promise<HTMLServerConfig> {
  if (serverCommit === undefined) serverCommit = await getServerCommit()

  const defaultTheme = getThemeOrDefault(CONFIG.THEME.DEFAULT, DEFAULT_THEME_NAME)

  return {
    instance: {
      name: CONFIG.INSTANCE.NAME,
      shortDescription: CONFIG.INSTANCE.SHORT_DESCRIPTION,
      isNSFW: CONFIG.INSTANCE.IS_NSFW,
      defaultNSFWPolicy: CONFIG.INSTANCE.DEFAULT_NSFW_POLICY,
      defaultClientRoute: CONFIG.INSTANCE.DEFAULT_CLIENT_ROUTE,
      customizations: {
        javascript: CONFIG.INSTANCE.CUSTOMIZATIONS.JAVASCRIPT,
        css: CONFIG.INSTANCE.CUSTOMIZATIONS.CSS
      }
    },
    search: {
      remoteUri: {
        users: CONFIG.SEARCH.REMOTE_URI.USERS,
        anonymous: CONFIG.SEARCH.REMOTE_URI.ANONYMOUS
      },
      searchIndex: {
        enabled: CONFIG.SEARCH.SEARCH_INDEX.ENABLED,
        url: CONFIG.SEARCH.SEARCH_INDEX.URL,
        disableLocalSearch: CONFIG.SEARCH.SEARCH_INDEX.DISABLE_LOCAL_SEARCH,
        isDefaultSearch: CONFIG.SEARCH.SEARCH_INDEX.IS_DEFAULT_SEARCH
      }
    },
    plugin: {
      registered: getRegisteredPlugins(),
      registeredExternalAuths: getExternalAuthsPlugins(),
      registeredIdAndPassAuths: getIdAndPassAuthPlugins()
    },
    theme: {
      registered: getRegisteredThemes(),
      default: defaultTheme
    },
    email: {
      enabled: isEmailEnabled()
    },
    contactForm: {
      enabled: CONFIG.CONTACT_FORM.ENABLED
    },
    serverVersion: PEERTUBE_VERSION,
    serverCommit,
    transcoding: {
      hls: {
        enabled: CONFIG.TRANSCODING.HLS.ENABLED
      },
      webtorrent: {
        enabled: CONFIG.TRANSCODING.WEBTORRENT.ENABLED
      },
      enabledResolutions: getEnabledResolutions('vod'),
      profile: CONFIG.TRANSCODING.PROFILE,
      availableProfiles: VideoTranscodingProfilesManager.Instance.getAvailableProfiles('vod')
    },
    live: {
      enabled: CONFIG.LIVE.ENABLED,

      allowReplay: CONFIG.LIVE.ALLOW_REPLAY,
      maxDuration: CONFIG.LIVE.MAX_DURATION,
      maxInstanceLives: CONFIG.LIVE.MAX_INSTANCE_LIVES,
      maxUserLives: CONFIG.LIVE.MAX_USER_LIVES,

      transcoding: {
        enabled: CONFIG.LIVE.TRANSCODING.ENABLED,
        enabledResolutions: getEnabledResolutions('live'),
        profile: CONFIG.LIVE.TRANSCODING.PROFILE,
        availableProfiles: VideoTranscodingProfilesManager.Instance.getAvailableProfiles('live')
      },

      rtmp: {
        port: CONFIG.LIVE.RTMP.PORT
      }
    },
    import: {
      videos: {
        http: {
          enabled: CONFIG.IMPORT.VIDEOS.HTTP.ENABLED
        },
        torrent: {
          enabled: CONFIG.IMPORT.VIDEOS.TORRENT.ENABLED
        }
      }
    },
    autoBlacklist: {
      videos: {
        ofUsers: {
          enabled: CONFIG.AUTO_BLACKLIST.VIDEOS.OF_USERS.ENABLED
        }
      }
    },
    avatar: {
      file: {
        size: {
          max: CONSTRAINTS_FIELDS.ACTORS.IMAGE.FILE_SIZE.max
        },
        extensions: CONSTRAINTS_FIELDS.ACTORS.IMAGE.EXTNAME
      }
    },
    banner: {
      file: {
        size: {
          max: CONSTRAINTS_FIELDS.ACTORS.IMAGE.FILE_SIZE.max
        },
        extensions: CONSTRAINTS_FIELDS.ACTORS.IMAGE.EXTNAME
      }
    },
    video: {
      image: {
        extensions: CONSTRAINTS_FIELDS.VIDEOS.IMAGE.EXTNAME,
        size: {
          max: CONSTRAINTS_FIELDS.VIDEOS.IMAGE.FILE_SIZE.max
        }
      },
      file: {
        extensions: CONSTRAINTS_FIELDS.VIDEOS.EXTNAME
      }
    },
    videoCaption: {
      file: {
        size: {
          max: CONSTRAINTS_FIELDS.VIDEO_CAPTIONS.CAPTION_FILE.FILE_SIZE.max
        },
        extensions: CONSTRAINTS_FIELDS.VIDEO_CAPTIONS.CAPTION_FILE.EXTNAME
      }
    },
    user: {
      videoQuota: CONFIG.USER.VIDEO_QUOTA,
      videoQuotaDaily: CONFIG.USER.VIDEO_QUOTA_DAILY
    },
    trending: {
      videos: {
        intervalDays: CONFIG.TRENDING.VIDEOS.INTERVAL_DAYS,
        algorithms: {
          enabled: CONFIG.TRENDING.VIDEOS.ALGORITHMS.ENABLED,
          default: CONFIG.TRENDING.VIDEOS.ALGORITHMS.DEFAULT
        }
      }
    },
    tracker: {
      enabled: CONFIG.TRACKER.ENABLED
    },

    followings: {
      instance: {
        autoFollowIndex: {
          indexUrl: CONFIG.FOLLOWINGS.INSTANCE.AUTO_FOLLOW_INDEX.INDEX_URL
        }
      }
    },

    broadcastMessage: {
      enabled: CONFIG.BROADCAST_MESSAGE.ENABLED,
      message: CONFIG.BROADCAST_MESSAGE.MESSAGE,
      level: CONFIG.BROADCAST_MESSAGE.LEVEL,
      dismissable: CONFIG.BROADCAST_MESSAGE.DISMISSABLE
    }
  }
}

function getRegisteredThemes () {
  return PluginManager.Instance.getRegisteredThemes()
                      .map(t => ({
                        name: t.name,
                        version: t.version,
                        description: t.description,
                        css: t.css,
                        clientScripts: t.clientScripts
                      }))
}

function getRegisteredPlugins () {
  return PluginManager.Instance.getRegisteredPlugins()
                      .map(p => ({
                        name: p.name,
                        version: p.version,
                        description: p.description,
                        clientScripts: p.clientScripts
                      }))
}

function getEnabledResolutions (type: 'vod' | 'live') {
  const transcoding = type === 'vod'
    ? CONFIG.TRANSCODING
    : CONFIG.LIVE.TRANSCODING

  return Object.keys(transcoding.RESOLUTIONS)
               .filter(key => transcoding.ENABLED && transcoding.RESOLUTIONS[key] === true)
               .map(r => parseInt(r, 10))
}

// ---------------------------------------------------------------------------

export {
  getServerConfig,
  getRegisteredThemes,
  getEnabledResolutions,
  getRegisteredPlugins,
  getHTMLServerConfig
}

// ---------------------------------------------------------------------------

function getIdAndPassAuthPlugins () {
  const result: RegisteredIdAndPassAuthConfig[] = []

  for (const p of PluginManager.Instance.getIdAndPassAuths()) {
    for (const auth of p.idAndPassAuths) {
      result.push({
        npmName: p.npmName,
        name: p.name,
        version: p.version,
        authName: auth.authName,
        weight: auth.getWeight()
      })
    }
  }

  return result
}

function getExternalAuthsPlugins () {
  const result: RegisteredExternalAuthConfig[] = []

  for (const p of PluginManager.Instance.getExternalAuths()) {
    for (const auth of p.externalAuths) {
      result.push({
        npmName: p.npmName,
        name: p.name,
        version: p.version,
        authName: auth.authName,
        authDisplayName: auth.authDisplayName()
      })
    }
  }

  return result
}