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")


function Trackhandler(self)
  local track_id = self.params.track

  local track = models.Tracks:find({ id = track_id })
  if not track then
    self:write({"Not Found", status = 404})
  end

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

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

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


  track["artist"] = artists[1]["artist_name"]

  local airtimes = db.query([[
      SELECT airtime
      FROM airtimes
      WHERE track = ?
  ]], track["id"])

  track["airtimes"] = {}
  for i, airtime in ipairs(airtimes) do
    track["airtimes"][i] = airtime.airtime
  end

  return { json = track }

end

return Trackhandler