const api = require('../../../api-action')
const DB = require('../../../database')

async function run (fn = null, txt, source) {
  if (!fn || typeof fn !== 'function') return null
  let res = null
  let db = null
  try {
    db = await DB.connect()
    res = await fn(txt, source, db)
  } catch (err) {
    console.log(err)
  }
  if (db !== null && 'release' in db) db.release()
  return res
}
/**
 * add group to database
 * @param {string} txt command body format => groupName notifyEnable(0,1)
 * @param {object} source
 * @param {object} db
 */
const addGroup = async (txt, source = {}, db) => {
  if (!db) return null
  if (!('type' in source) || !('groupId' in source) || !('userId' in source)) return null
  let {groupId, userId} = source
  let arr = txt.split(' ')
  if (arr.length < 2 || !isFinite(arr[1])) return null
  let name = arr[0]
  let notify = arr[1]
  if (typeof notify === 'string') notify = parseInt(notify)
  if (notify !== 0 && notify !== 1) return null
  let text = `select "id" from "public"."line_group" where "id" = $1`
  let values = [groupId]
  let result = await db.query({
    text,
    values
  })
  if (result.rowCount > 0) {
    let reply = 'group exists'
    return { reply }
  }
  text = `insert into "public"."line_group" ("id", "name", "notify", "owner", "ctime", "mtime") values ($1, $2, $3, $4, now(), now())`
  values = [groupId, name, (notify === 1), userId]
  await db.query({
    text,
    values
  })
  let reply = 'add success'
  return { reply }
}

/**
 * add facebook page notify to group
 * @param {string} txt command body format => pageid tmpl
 * @param {object} source
 * @param {object} db
 */
const addPage = async (txt, source = {}, db) => {
  if (!db) return null
  if (!('type' in source) || !('groupId' in source) || !('userId' in source)) return null
  let {groupId, userId} = source
  let arr = txt.split(' ')
  if (arr.length < 2) return null
  let page = arr[0]
  let tmpl = arr.slice(1).join(' ')
  let text = `select "id","owner" from "public"."line_group" where "id" = $1`
  let values = [groupId]
  let result = await db.query({
    text,
    values
  })
  if (result.rowCount === 0) {
    let reply = 'group not register'
    return { reply }
  }
  if (result.rows[0].owner !== userId) {
    let reply = 'not owner'
    return { reply }
  }
  // check page exists
  text = `select "id" from "public"."facebook_page" where "id"=$1`
  values = [page]
  let fb = await db.query({
    text,
    values
  })
  // if no page data insert page data and insert rt
  if (fb.rowCount === 0) {
    text = `insert into "public"."facebook_page" ("id", "lastpost", "ctime", "mtime") values 
      ($1, '', now(), now())`
    values = [page]
    await db.query({
      text,
      values
    })
    text = `insert into "public"."line_fb_rt" ("line", "facebook", "tmpl") values ($1, $2, $3)`
    values = [groupId, page, tmpl]
    await db.query({
      text,
      values
    })
  } else {
    // check rt exists
    text = `select rt.* from "public"."line_fb_rt" rt 
      left join "public"."line_group" line
      on line."id" = rt."line"
      left join "public"."facebook_page" fb
      on fb."id" = rt."facebook"
      where 
      fb."id" = $1
      and line."id" = $2`
    values = [page, groupId]
    let rt = await db.query({
      text,
      values
    })
    if (rt.rowCount === 0) {
      text = `insert into "public"."line_fb_rt" ("line", "facebook", "tmpl") values ($1, $2, $3)`
      values = [groupId, page, tmpl]
      await db.query({
        text,
        values
      })
    }
  }

  let reply = 'add page success'
  return { reply }
}

/**
 * del facebook page notify from group
 * @param {string} txt command body format => pageid tmpl
 * @param {object} source
 * @param {object} db
 */
const delPage = async (txt = '', source = {}, db) => {
  if (!db) return null
  if (!('type' in source) || !('groupId' in source) || !('userId' in source)) return null
  let {groupId, userId} = source
  let arr = txt.split(' ')
  if (arr.length < 1) return null
  let page = arr[0]
  let text = `select "id","owner" from "public"."line_group" where "id" = $1`
  let values = [groupId]
  let result = await db.query({
    text,
    values
  })
  if (result.rowCount === 0) {
    let reply = 'group not register'
    return { reply }
  }
  if (result.rows[0].owner !== userId) {
    let reply = 'not owner'
    return { reply }
  }

  text = `select count(rt.*) as c from "public"."line_fb_rt" rt
    left join "public"."facebook_page" fb
    on fb."id" = rt."facebook"
    where 
    fb."id" = $1`
  values = [page]
  let count = await db.query({
    text,
    values
  })
  if (count.rowCount === 0 || count.rows[0].c === 0) return null

  text = `select rt.* from "public"."line_fb_rt" rt
  left join "public"."facebook_page" fb
  on fb."id" = rt."facebook"
  where 
  fb."id" = $1
  and rt."line" = $2`
  values = [page, groupId]
  let rt = await db.query({
    text,
    values
  })
  if (rt.rowCount === 0) return null
  if (rt.rowCount == 1 && count.rows[0].c == 1) { // eslint-disable-line
    let text = `delete from "public"."facebook_page" where "id" = $1`
    let values = [page]
    await db.query({
      text,
      values
    })
  } else {
    let text = `delete from "public"."line_fb_rt" where "line" = $1 and "facebook" = $2`
    let values = [groupId, page]
    await db.query({
      text,
      values
    })
  }

  return {
    reply: 'delete page notify success'
  }
}

/**
 * add twitch channel notify to group
 * @param {string} txt command body format => twitch_user type tmpl
 * @param {object} source
 * @param {object} db
 */
const addTwitch = async (txt = '', source = {}, db) => {
  if (!db) return null
  if (!('type' in source) || !('groupId' in source) || !('userId' in source)) return null
  let {groupId, userId} = source
  let arr = txt.split(' ')
  if (arr.length < 3) return null
  let name = arr[0]
  let type = arr[1]
  let tmpl = arr.slice(2).join(' ')

  if (['live'].indexOf(type) < 0) return null

  let text = `select "id","owner" from "public"."line_group" where "id" = $1`
  let values = [groupId]
  let result = await db.query({
    text,
    values
  })
  if (result.rowCount === 0) {
    let reply = 'group not register'
    return { reply }
  }
  if (result.rows[0].owner !== userId) {
    let reply = 'not owner'
    return { reply }
  }

  let twitchUser = await api.twitch.getUserIDByName(name)
  if (twitchUser === null) return null

  // check channel count
  text = `select "id" from "public"."twitch_channel" where "id" = $1`
  values = [twitchUser.id]
  let twch = await db.query({
    text,
    values
  })

  if (twch.rowCount === 0) {
    let text = `insert into "public"."twitch_channel" ("id", "name", "ctime", "mtime") values 
      ($1, $2, now(), now())`
    let values = [twitchUser.id, twitchUser.login]
    await db.query({
      text,
      values
    })
    text = `insert into "public"."line_twitch_rt" ("line", "twitch", "tmpl", "type") values
      ($1, $2, $3, $4)`
    values = [groupId, twitchUser.id, tmpl, type]
    await db.query({
      text,
      values
    })
  } else {
    let text = `select rt.* from "public"."line_twitch_rt" rt
      left join "public"."twitch_channel" twitch
      on twitch."id" = rt."twitch"
      left join "public"."line_group" line
      on line."id" = rt."line"
      where
      line."id" = $1
      and twitch."id" = $2
      and rt."type" = $3`
    let values = [groupId, twitchUser.id, type]
    let rt = await db.query({
      text,
      values
    })
    if (rt.rowCount === 0) {
      let text = `insert into "public"."line_twitch_rt" ("line", "twitch", "tmpl", "type") values
        ($1, $2, $3, $4)`
      let values = [groupId, twitchUser.id, tmpl, type]
      await db.query({
        text,
        values
      })
    }
  }

  // api.twitch.registerWebHook(twitchUser.id, type)
  return {
    reply: 'add channel success'
  }
}

/**
 * del twitch channel notify from group
 * @param {string} txt command body format => twitch_user type
 * @param {object} source
 * @param {object} db
 */
const delTwitch = async (txt = '', source = {}, db) => {
  if (!db) return null
  if (!('type' in source) || !('groupId' in source) || !('userId' in source)) return null
  let {groupId, userId} = source
  let arr = txt.split(' ')
  if (arr.length < 2) return null
  let twitch = arr[0]
  let type = arr[1]
  let text = `select "id","owner" from "public"."line_group" where "id" = $1`
  let values = [groupId]
  let result = await db.query({
    text,
    values
  })
  if (result.rowCount === 0) {
    let reply = 'group not register'
    return { reply }
  }
  if (result.rows[0].owner !== userId) {
    let reply = 'not owner'
    return { reply }
  }

  text = `select count(rt.*) as c from "public"."line_twitch_rt" rt
    left join "public"."twitch_channel" twitch
    on twitch."id" = rt."twitch"
    where 
    twitch."name" = $1`
  values = [twitch]
  let count = await db.query({
    text,
    values
  })
  if (count.rowCount === 0 || count.rows[0].c === 0) return null

  text = `select rt.* from "public"."line_twitch_rt" rt
  left join "public"."twitch_channel" twitch
  on twitch."id" = rt."twitch"
  where 
  twitch."name" = $1
  and rt."line" = $2`
  values = [twitch, groupId]
  let rt = await db.query({
    text,
    values
  })
  if (rt.rowCount === 0) return null
  if (rt.rowCount == 1 && count.rows[0].c == 1) { // eslint-disable-line
    let text = `delete from "public"."twitch_channel" where "name" = $1`
    let values = [twitch]
    await db.query({
      text,
      values
    })
  } else {
    let text = `select "id" from "public"."twitch_channel" where "name" = $1`
    let values = [twitch]
    let tc = await db.query({
      text,
      values
    })
    if (tc.rowCount > 0) {
      let text = `delete from "public"."line_twitch_rt" where "line" = $1 and "type" = $2 and "twitch" = $3`
      let values = [groupId, type, tc.rows[0].id]
      await db.query({
        text,
        values
      })
    }
  }

  return {
    reply: 'delete twitch notify success'
  }
}

module.exports = {
  addgroup: run.bind(null, addGroup),
  addpage: run.bind(null, addPage),
  delpage: run.bind(null, delPage),
  addtwitch: run.bind(null, addTwitch),
  deltwitch: run.bind(null, delTwitch)
}