extends Node

var base_resolution: Vector2 = Vector2(ProjectSettings.get_setting('display/window/size/width'), ProjectSettings.get_setting('display/window/size/height'))  # Vector2(640, 360)
var shrink_timer := Timer.new()

static func load_json(filename: String) -> Dictionary:
	var file := File.new()
	var error := file.open(filename, File.READ)
	if error == OK:
		var result = JSON.parse(file.get_as_text())
		if result.error == OK:
			return result.result
		else:
			print_debug(result.error_string)
			print_debug(result.error_line)
	return {}

static func load_tsv(filename: String, delimiter: String = '\t') -> Dictionary:
	var file := File.new()
	var error := file.open(filename, File.READ)
	if error == OK:
		var headers := file.get_csv_line(delimiter)
		var n := headers.size()
		var output = {}
		while file.get_position() < file.get_len():
			var line := file.get_csv_line(delimiter)
			var entry := {}
			for i in range(1, n):
				if line.size() > i:
					var token := line[i]
					entry[headers[i]] = token
					if token.begins_with('0x'):
						var hex := token.hex_to_int()
						if hex > 0:
							entry[headers[i]] = hex
			output[line[0]] = entry
		return output
	print_debug(error)
	return {}

var SNES_PSX_addresses := load_tsv('res://data/SNES_PSX_addresses.tsv')

func shrink_to_integer():
	var size := OS.get_window_size()
	var scale_vec := size / base_resolution
	var scale_f := max(min(scale_vec.x, scale_vec.y), 1)
	var scale := int(scale_f)
	var new_window_size := base_resolution*scale
	if OS.get_window_size() != new_window_size:  # avoid retriggering this event forever
		OS.set_window_size(new_window_size)
	print('resized to scale %d %s' % [scale, new_window_size])

func update_window_scale():
	if OS.window_size < base_resolution*2:
		OS.window_size = base_resolution*2
	var size := OS.get_window_size()
	var scale_vec := size / base_resolution
	var scale_f := max(min(scale_vec.x, scale_vec.y), 1)
	var scale := int(scale_f)
	if ProjectSettings.get_setting('display/window/size/snap_to_integer'):
		# OS.window_size = base_resolution*scale
		shrink_timer.paused = false
		shrink_timer.start(1)
	get_tree().set_screen_stretch(SceneTree.STRETCH_MODE_DISABLED, SceneTree.STRETCH_ASPECT_KEEP, base_resolution*scale, scale)

func _ready():
	shrink_timer.connect('timeout', self, 'shrink_to_integer')
	shrink_timer.one_shot = true
	add_child(shrink_timer)
	get_tree().connect('screen_resized', self, 'update_window_scale')
	OS.set_min_window_size(base_resolution*2)