// Copyright 2018 The Ebiten Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package audio_test

import (
	"errors"
	"os"
	"runtime"
	"testing"
	"time"

	"github.com/hajimehoshi/ebiten"
	. "github.com/hajimehoshi/ebiten/audio"
	"github.com/hajimehoshi/ebiten/internal/testflock"
)

func TestMain(m *testing.M) {
	testflock.Lock()
	defer testflock.Unlock()

	code := 0
	// Run an Ebiten process so that audio is available.
	regularTermination := errors.New("regular termination")
	f := func(screen *ebiten.Image) error {
		code = m.Run()
		return regularTermination
	}
	if err := ebiten.Run(f, 320, 240, 1, "Test"); err != nil && err != regularTermination {
		panic(err)
	}
	os.Exit(code)
}

var context *Context

func init() {
	var err error
	context, err = NewContext(44100)
	if err != nil {
		panic(err)
	}
}

// Issue #746
func TestGC(t *testing.T) {
	p, _ := NewPlayer(context, BytesReadSeekCloser(make([]byte, 4)))
	got := PlayersNumForTesting()
	if want := 0; got != want {
		t.Errorf("PlayersNum(): got: %d, want: %d", got, want)
	}

	p.Play()
	got = PlayersNumForTesting()
	if want := 1; got != want {
		t.Errorf("PlayersNum() after Play: got: %d, want: %d", got, want)
	}

	runtime.KeepAlive(p)
	p = nil
	runtime.GC()

	ch := make(chan struct{})
	go func() {
		defer close(ch)
		for i := 0; i < 10; i++ {
			got = PlayersNumForTesting()
			if want := 0; got == want {
				return
			}
			// 100[ms] should be enough all the bytes are consumed.
			// TODO: This is a darty hack. Would it be possible to use virtual time?
			time.Sleep(100 * time.Millisecond)
		}
		t.Errorf("time out")
	}()

	<-ch
}