package go4k_test

import (
	"encoding/json"
	"reflect"
	"testing"

	"github.com/vsariola/sointu/go4k"
)

const expectedMarshaled = `{"BPM":100,"Patterns":["QABEACAAAABLAE4AAAAAAA=="],"Tracks":[{"NumVoices":1,"Sequence":"AA=="}],"Patch":{"Instruments":[{"NumVoices":1,"Units":[{"Type":"envelope","Parameters":{"attack":32,"decay":32,"gain":128,"release":64,"stereo":0,"sustain":64}},{"Type":"oscillator","Parameters":{"color":96,"detune":64,"flags":64,"gain":128,"phase":0,"shape":64,"stereo":0,"transpose":64}},{"Type":"mulp","Parameters":{"stereo":0}},{"Type":"envelope","Parameters":{"attack":32,"decay":32,"gain":128,"release":64,"stereo":0,"sustain":64}},{"Type":"oscillator","Parameters":{"color":64,"detune":64,"flags":64,"gain":128,"phase":64,"shape":96,"stereo":0,"transpose":72}},{"Type":"mulp","Parameters":{"stereo":0}},{"Type":"out","Parameters":{"gain":128,"stereo":1}}]}],"DelayTimes":[],"SampleOffsets":[]},"Output16Bit":false}`

var testSong = go4k.Song{
	BPM:      100,
	Patterns: [][]byte{{64, 0, 68, 0, 32, 0, 0, 0, 75, 0, 78, 0, 0, 0, 0, 0}},
	Tracks: []go4k.Track{
		{NumVoices: 1, Sequence: []byte{0}},
	},
	Patch: go4k.Patch{
		Instruments: []go4k.Instrument{{NumVoices: 1, Units: []go4k.Unit{
			{"envelope", map[string]int{"stereo": 0, "attack": 32, "decay": 32, "sustain": 64, "release": 64, "gain": 128}},
			{"oscillator", map[string]int{"stereo": 0, "transpose": 64, "detune": 64, "phase": 0, "color": 96, "shape": 64, "gain": 128, "flags": 0x40}},
			{"mulp", map[string]int{"stereo": 0}},
			{"envelope", map[string]int{"stereo": 0, "attack": 32, "decay": 32, "sustain": 64, "release": 64, "gain": 128}},
			{"oscillator", map[string]int{"stereo": 0, "transpose": 72, "detune": 64, "phase": 64, "color": 64, "shape": 96, "gain": 128, "flags": 0x40}},
			{"mulp", map[string]int{"stereo": 0}},
			{"out", map[string]int{"stereo": 1, "gain": 128}},
		}}},
		DelayTimes:    []int{},
		SampleOffsets: []go4k.SampleOffset{},
	},
}

func TestSongMarshalJSON(t *testing.T) {
	songbytes, err := json.Marshal(testSong)
	if err != nil {
		t.Fatalf("cannot marshal song: %v", err)
	}
	if string(songbytes) != expectedMarshaled {
		t.Fatalf("expectedMarshaled song to unexpected result, got %v, expected %v", string(songbytes), expectedMarshaled)
	}
}

func TestSongUnmarshalJSON(t *testing.T) {
	var song go4k.Song
	err := json.Unmarshal([]byte(expectedMarshaled), &song)
	if err != nil {
		t.Fatalf("cannot unmarshal song: %v", err)
	}
	if !reflect.DeepEqual(song, testSong) {
		t.Fatalf("unmarshaled song to unexpected result, got %#v, expected  %#v", song, testSong)
	}
}