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, release.name AS release_name
        FROM track_artists
        INNER JOIN
            tracks AS track ON (track_artists.track = track.id)
            INNER JOIN
                track_releases AS track_release ON (track_release.track = track.id)
                INNER JOIN
                    releases AS release ON (track_release.release = release.id)
        WHERE track_artists.artist = ?
  ]], artist["id"])

artist["tracks"] = tracks

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

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

  return { json = artist }

end

return Artisthandler