package subsonic

import (
	"encoding/json"

	"git.noroutes.net/NoRoutes/vibetunes/internal/database"
)

func init() {
	register("getPlayQueue", handleGetPlayQueue)
	register("savePlayQueue", handleSavePlayQueue)
}

func handleGetPlayQueue(rc *Context) *apiError {
	db := rc.Server.DB
	q, err := database.GetPlayQueue(db, rc.User.ID)
	if err == database.ErrNotFound {
		rc.Response = newResponse()
		return nil
	}
	if err != nil {
		return newError(ErrGeneric, err.Error())
	}

	var ids []string
	if uerr := json.Unmarshal([]byte(q.SongIDsJSON), &ids); uerr != nil {
		return newError(ErrGeneric, "corrupt saved play queue")
	}

	out := &PlayQueue{
		Position:  int64(q.PositionMs),
		Username:  rc.User.Username,
		Changed:   isoTime(q.UpdatedAt),
		ChangedBy: q.Client,
	}
	for i, id := range ids {
		song, serr := database.GetSong(db, id)
		if serr != nil {
			continue
		}
		mf, merr := database.GetMediaFile(db, song.MediaFileID)
		if merr != nil {
			continue
		}
		out.Entry = append(out.Entry, childFromSong(db, song, mf, albumOfSong(db, song), rc.User.ID))
		if i == q.CurrentIndex {
			out.Current = song.ID
		}
	}

	rc.Response = newResponse()
	rc.Response.PlayQueue = out
	return nil
}

func handleSavePlayQueue(rc *Context) *apiError {
	ids := rc.Params.GetAll("id")
	current := rc.Params.Get("current")
	position := rc.Params.Int("position", 0)
	client := rc.Params.Get("c")

	currentIndex := 0
	for i, id := range ids {
		if id == current {
			currentIndex = i
			break
		}
	}

	encoded, err := json.Marshal(ids)
	if err != nil {
		return newError(ErrGeneric, err.Error())
	}
	if err := database.SavePlayQueue(rc.Server.DB, rc.User.ID, string(encoded), currentIndex, position, client); err != nil {
		return newError(ErrGeneric, err.Error())
	}
	rc.Response = newResponse()
	return nil
}