local db = require("lapis.db")
local to_json = require("lapis.util").to_json
local autoload = require("lapis.util").autoload
local preload = require("lapis.db.model").preload

local models = autoload("models")


local function Artisthandler(self)
  local artist_id = self.params.artist

  local artist = models.Artists:find({ id = artist_id })
  if not artist then
    self:write({"Not Found", status = 404})
    return
  end

  local hidden_fields = {
      "unique_name",
      "created_at",
      "updated_at"
    }

  for i, field in ipairs(hidden_fields) do
    artist[field] = nil
  end

  local tracks = db.query([[
    SELECT track.name AS track_name, track.id
    FROM track_artists
    INNER JOIN
        tracks AS track ON (track_artists.track = track.id)
    WHERE track_artists.artist = ?
  ]], artist["id"])

  artist["tracks"] = tracks

  for i, track in ipairs(tracks) do
    local airtimes = db.query([[
      SELECT airtime, station AS station_id
      FROM airtimes
      WHERE track = ?
    ]], track["id"])

    artist["tracks"][i]["airtimes"] = {}
    for j, airtime in ipairs(airtimes) do
        table.insert(artist["tracks"][i]["airtimes"], airtime)
    end

    local releases = db.query([[
      SELECT release.id AS release_id, release.name AS release_name
      FROM track_releases
      INNER JOIN
        releases AS release ON (track_releases.release = release.id)
      WHERE track = ?
    ]], track["id"])

    artist["tracks"][i]["releases"] = {}
    for k, release in ipairs(releases) do
      print(to_json(release))
      table.insert(artist["tracks"][i]["releases"], release)
    end

  end

  return { json = artist }

end

return Artisthandler