extends Node2D
#warning-ignore-all:return_value_discarded
signal exit
const MusicPlayer := preload('res://scripts/MusicPlayer.gd')
const MusicRenderer := preload('res://scripts/MusicRenderer.gd')
var MusicLoader := preload('res://scripts/loaders/snes/music_ff5.gd').new()
onready var bgm_titles := Common.load_glyph_table('res://data/5/bgm_titles.txt')
onready var audio_renderer: Node = SoundLoader.audio_renderer
var inst_buttons = []
var sfx_buttons = []

const NUM_CHANNELS := 8
var music_player = null
var inst_sample_map := {}

func _create_sfx_buttons():
	var disable_btn := !SoundLoader.has_loaded_audio_samples
	var btn_width := 48
	var btn_height := 22
	var btns_per_row := 8
	var inst_pos_offset: Vector2 = $inst_buttons.rect_position
	for i in SoundLoader.INST_NUM:
		var btn = Button.new()
		btn.text = 'Inst #%02d' % i
		btn.align = Button.ALIGN_CENTER
		btn.set_position(Vector2((i%btns_per_row)*btn_width, (i/btns_per_row)*btn_height) + inst_pos_offset)
		btn.rect_min_size.x = btn_width
		add_child(btn)
		btn.connect('pressed', SoundLoader, 'play_sample', [i])
		inst_buttons.append(btn)
		btn.disabled = disable_btn
	btns_per_row = int($sfx_buttons.rect_size.x/btn_width)
	var sfx_pos_offset: Vector2 = $sfx_buttons.rect_position
	for i in SoundLoader.SFX_NUM:
		var btn = Button.new()
		btn.text = 'SFX #%02d' % i
		btn.align = Button.ALIGN_CENTER
		btn.set_position(Vector2((i%btns_per_row)*btn_width, (i/btns_per_row)*btn_height) + sfx_pos_offset)
		btn.rect_min_size.x = btn_width
		add_child(btn)
		btn.connect('pressed', SoundLoader, 'play_sfx', [i])
		sfx_buttons.append(btn)
		btn.disabled = disable_btn
	if disable_btn:
		SoundLoader.connect('audio_samples_loaded', self, '_enable_sfx_buttons')
		SoundLoader.connect('audio_inst_sample_loaded', self, '_enable_inst_button')
		SoundLoader.connect('audio_sfx_sample_loaded', self, '_enable_sfx_button')

func _enable_sfx_buttons():
	for btn in sfx_buttons:
		btn.disabled = false
	for btn in inst_buttons:
		btn.disabled = false

func _enable_sfx_button(id: int):
	# NB: This assumes sequential loading (may change, probably won't)
	for i in id+1:
		sfx_buttons[i].disabled = false

func _enable_inst_button(id: int):
	# NB: This assumes sequential loading (may change, probably won't)
	for i in id+1:
		inst_buttons[i].disabled = false


func play_bgm(id: int, live: bool) -> void:
	self._stop_all()
	if live:
		print('@%dms - Playing BGM%02d' % [get_ms(), id])
		var inst_indices = RomLoader.snes_data.bgm_instrument_indices[id]
		for i in 16:
			var inst_idx: int = inst_indices[i]-1
			if inst_idx < 0:
				self.inst_sample_map[i + 0x20] = null
			else:
				self.inst_sample_map[i + 0x20] = SoundLoader.instrument_samples_HACK_EXTENDED_LOOPS[inst_idx]
		if self.music_player:
			remove_child(music_player)
		self.music_player = MusicPlayer.new(MusicManager.bgm_tracksets[id], self.inst_sample_map)
		add_child(self.music_player)
		self.music_player.is_playing = true
	else:
		# Play prerendered
		var tempo_thou = $slider_tempo.value * 10
		var key = 'BGM%02d-%04d' % [id, tempo_thou]
		MusicManager.play_bgm(key)

func _play_bgm_live() -> void:
	self.play_bgm($sb_bgm.value, true)

func _play_bgm_prerendered() -> void:
	self.play_bgm($sb_bgm.value, false)


func _create_bgm_playback() -> void:
	$sb_bgm.max_value = SoundLoader.BGM_NUM
	$sb_bgm.connect('value_changed', self, '_update_bgm_label')
	self._update_bgm_label()
	$btn_bgm_live.connect('pressed', self, '_play_bgm_live')
	$btn_bgm_prerendered.connect('pressed', self, '_play_bgm_prerendered')
	$btn_render.connect('pressed', MusicManager, 'render_all_bgm')
	for i in SoundLoader.SFX_NUM:
		self.inst_sample_map[i] = SoundLoader.sfx_samples[i]


func _stop_all() -> void:
	if self.music_player:
		self.music_player.queue_free()
		self.music_player = null
	SoundLoader.player.stop()
	MusicManager.stop()


func _update_bgm_label(id = 0) -> void:
	if id < len(bgm_titles):
		$lbl_bgm_title.text = bgm_titles[id]
	else:
		$lbl_bgm_title.text = ''


func _update_tempo(tempo := 100) -> void:
	$lbl_tempo.text = 'Tempo scale: %d' % tempo
	var tempo_thou = tempo * 10
	MusicManager.update_tempo(tempo_thou)

func _reset_tempo() -> void:
	self._update_tempo()
	$slider_tempo.value = 100


func _exit() -> void:
	self.emit_signal('exit')

func _ready() -> void:
	self._create_sfx_buttons()
	self._create_bgm_playback()
	$btn_stop.connect('pressed', self, '_stop_all')
	$slider_tempo.connect('value_changed', self, '_update_tempo')
	$btn_reset_tempo.connect('pressed', self, '_reset_tempo')
	$btn_exit.connect('pressed', self, '_exit')


var load_start_tick: int
func get_ms(restart: bool = false) -> int:
	if restart or not self.load_start_tick:
		self.load_start_tick = Time.get_ticks_msec()
		return 0
	return Time.get_ticks_msec() - self.load_start_tick


func get_shader_test_pattern() -> PoolByteArray:
	var midi_events_bytes := StreamPeerBuffer.new()
	var midi_events_bytes2 := StreamPeerBuffer.new()
	var midi_events_bytes3 := StreamPeerBuffer.new()
	var midi_events_bytes4 := StreamPeerBuffer.new()
	for i in 2048:
		var t = i * 2.0
		midi_events_bytes.put_32(t*32000)  # t_start
		midi_events_bytes2.put_32((t+1.75)*32000)  # t_end
		midi_events_bytes3.put_u8(i%35)  # instrument
		midi_events_bytes3.put_u8(71)  # pitch_idx
		# midi_events_bytes.put_float((35 + (i%40)))  # pitch_idx
		midi_events_bytes3.put_u8(255)  # velocity
		midi_events_bytes3.put_u8(0)  # pan
		# midi_events_bytes3.put_u8(i%256)  # pan
		midi_events_bytes4.put_32(0)  # ADSR
	return midi_events_bytes.data_array + midi_events_bytes2.data_array + midi_events_bytes3.data_array + midi_events_bytes4.data_array