package assetstore

import (
	"log"
	"os"

	"github.com/hajimehoshi/ebiten/v2/audio"
	"github.com/hajimehoshi/ebiten/v2/audio/vorbis"
)

type Sound struct {
	Name string

	filename string
}

func (a *AssetStore) Sound(name string) (*Sound, error) {
	name = canonical(name)

	if sound, ok := a.sounds[name]; ok {
		return sound, nil
	}

	// TODO: Data/Sounds.dat + Sounds/wh40k.ds seem to operate together to allow
	// attributes and a .wav file to be attached to event names, which could be
	// what we use here instead. For now, we're just using the .wav files!
	log.Printf("Loading sound %v", name)

	// FIXME: a preprocessing script is used to create these files from the
	// original ADPCM .wav files. Instead, use the original .wav files.
	filename, err := a.lookup(name, "wav.ogg", "Wav")
	if err != nil {
		return nil, err
	}

	sound := &Sound{
		Name:     name,
		filename: filename,
	}

	a.sounds[name] = sound
	return sound, nil
}

func (s *Sound) Player() (*audio.Player, error) {
	decoder, err := s.decoder()
	if err != nil {
		return nil, err
	}

	return audio.NewPlayer(audio.CurrentContext(), decoder)
}

func (s *Sound) InfinitePlayer() (*audio.Player, error) {
	decoder, err := s.decoder()
	if err != nil {
		return nil, err
	}

	infinite := audio.NewInfiniteLoop(decoder, decoder.Length())

	return audio.NewPlayer(audio.CurrentContext(), infinite)
}

func (s *Sound) decoder() (*vorbis.Stream, error) {
	f, err := os.Open(s.filename)
	if err != nil {
		return nil, err
	}

	decoder, err := vorbis.Decode(audio.CurrentContext(), f)
	if err != nil {
		_ = f.Close()
		return nil, err
	}

	return decoder, nil
}