import { Logger, Storage, Collection, Dictionary } from '@freearhey/core'
import { PlaylistParser } from '../../core'
import { Channel, Stream, Blocked, Feed } from '../../models'
import { program } from 'commander'
import chalk from 'chalk'
import { uniqueId } from 'lodash'
import { DATA_DIR, STREAMS_DIR } from '../../constants'

program.argument('[filepath]', 'Path to file to validate').parse(process.argv)

type LogItem = {
  type: string
  line: number
  message: string
}

async function main() {
  const logger = new Logger()

  logger.info('loading data from api...')
  const dataStorage = new Storage(DATA_DIR)
  const channelsData = await dataStorage.json('channels.json')
  const channels = new Collection(channelsData).map(data => new Channel(data))
  const channelsGroupedById = channels.keyBy((channel: Channel) => channel.id)
  const feedsData = await dataStorage.json('feeds.json')
  const feeds = new Collection(feedsData).map(data =>
    new Feed(data).withChannel(channelsGroupedById)
  )
  const feedsGroupedByChannelId = feeds.groupBy((feed: Feed) =>
    feed.channel ? feed.channel.id : uniqueId()
  )
  const blocklistContent = await dataStorage.json('blocklist.json')
  const blocklist = new Collection(blocklistContent).map(data => new Blocked(data))
  const blocklistGroupedByChannelId = blocklist.keyBy((blocked: Blocked) => blocked.channelId)

  logger.info('loading streams...')
  const streamsStorage = new Storage(STREAMS_DIR)
  const parser = new PlaylistParser({
    storage: streamsStorage,
    channelsGroupedById,
    feedsGroupedByChannelId
  })
  const files = program.args.length ? program.args : await streamsStorage.list('**/*.m3u')
  const streams = await parser.parse(files)
  logger.info(`found ${streams.count()} streams`)

  let errors = new Collection()
  let warnings = new Collection()
  let streamsGroupedByFilepath = streams.groupBy((stream: Stream) => stream.getFilepath())
  for (const filepath of streamsGroupedByFilepath.keys()) {
    const streams = streamsGroupedByFilepath.get(filepath)
    if (!streams) continue

    const log = new Collection()
    const buffer = new Dictionary()
    streams.forEach((stream: Stream) => {
      if (stream.channelId) {
        const channel = channelsGroupedById.get(stream.channelId)
        if (!channel) {
          log.add({
            type: 'warning',
            line: stream.line,
            message: `"${stream.id}" is not in the database`
          })
        }
      }

      const duplicate = stream.url && buffer.has(stream.url)
      if (duplicate) {
        log.add({
          type: 'warning',
          line: stream.line,
          message: `"${stream.url}" is already on the playlist`
        })
      } else {
        buffer.set(stream.url, true)
      }

      const blocked = stream.channel ? blocklistGroupedByChannelId.get(stream.channel.id) : false
      if (blocked) {
        if (blocked.reason === 'dmca') {
          log.add({
            type: 'error',
            line: stream.line,
            message: `"${blocked.channelId}" is on the blocklist due to claims of copyright holders (${blocked.ref})`
          })
        } else if (blocked.reason === 'nsfw') {
          log.add({
            type: 'error',
            line: stream.line,
            message: `"${blocked.channelId}" is on the blocklist due to NSFW content (${blocked.ref})`
          })
        }
      }
    })

    if (log.notEmpty()) {
      logger.info(`\n${chalk.underline(filepath)}`)

      log.forEach((logItem: LogItem) => {
        const position = logItem.line.toString().padEnd(6, ' ')
        const type = logItem.type.padEnd(9, ' ')
        const status = logItem.type === 'error' ? chalk.red(type) : chalk.yellow(type)

        logger.info(` ${chalk.gray(position)}${status}${logItem.message}`)
      })

      errors = errors.concat(log.filter((logItem: LogItem) => logItem.type === 'error'))
      warnings = warnings.concat(log.filter((logItem: LogItem) => logItem.type === 'warning'))
    }
  }

  logger.error(
    chalk.red(
      `\n${
        errors.count() + warnings.count()
      } problems (${errors.count()} errors, ${warnings.count()} warnings)`
    )
  )

  if (errors.count()) {
    process.exit(1)
  }
}

main()