extends Node

const STRUCT := preload('res://scripts/struct.gd')
const STRUCT_SNES := preload('res://scripts/loaders/snes/structs.gd')
var structdefs := {}
const loader_cd_image := preload('res://scripts/loaders/cd/image.gd')
var psx_productcode_regex := RegEx.new()
const psx_ff5_productcodes = [
	'SLUS_008.79',  # US Anthology, both 1.0 and 1.1
	'SCES_138.40',  # EU/Aus Anthology
	'SLPM_860.81',  # JP
	'SCPS_452.14',  # JP original, untested
]

var ROM_filename := 'FF5_SCC_WepTweaks_Inus_Dash.sfc'  # 'Final Fantasy V (Japan).sfc'
var GBA_filename := '2564 - Final Fantasy V Advance (U)(Independent).gba'

var rom_snes := File.new()
var snes_data := {}
var thread := Thread.new()

func load_snes_rom(filename: String):
	var error := rom_snes.open(filename, File.READ)
	if error == OK:
		# Copy entire SNES ROM to a buffer for StreamPeerBuffer usage.
		# Unfortunately, the File API is different and slightly worse than the StreamPeer API.
		var bytes := rom_snes.get_buffer(rom_snes.get_len())
		var buffer = StreamPeerBuffer.new()
		buffer.data_array = bytes
		# SpriteLoader.load_snes_rom(rom_snes)
		# MapLoader.load_snes_rom(rom_snes)
		StringLoader.load_snes_rom(rom_snes, true)
		# Don't do this concurrently, avoid file pointer conflicts
		#var _thread_error = thread.start(SoundLoader, 'parse_rom', rom_snes)
		# Can concurrently work with the preloaded StreamPeerBuffer though
		for key in Common.SNES_PSX_addresses:
			var d = Common.SNES_PSX_addresses[key]
			if d.format:
				var s: STRUCT.StructType
				if d.format in structdefs:
					s = structdefs[d.format]
				else:
					s = STRUCT.get_structarraytype(d.format, structdefs)
					structdefs[d.format] = s
				if not s:
					assert(false, 'Invalid StructType: "%s"' % d.format)
				buffer.seek(d.SNES)
				if '.' in key:
					var keysplit: PoolStringArray = key.split('.', 1)
					var k0 := keysplit[0]
					var k1 = keysplit[1]
					if k1.is_valid_integer():
						k1 = int(k1)
					if not (k0 in snes_data):
						snes_data[k0] = {k1: s.get_value(buffer, [0, 0])}
					else:
						snes_data[k0][k1] = s.get_value(buffer, [0, 0])
				else:
					snes_data[key] = s.get_value(buffer, [0, 0])
		snes_data['job_levels'] = []
		for job_id in 21:
			var ability_list_ptr: int = snes_data.ptrs_job_ability_lists[job_id]
			var num_abilities: int = snes_data.job_ability_counts[job_id]
			var ability_list := []
			buffer.seek(0x110000 + ability_list_ptr)
			for i in num_abilities:
				var abp_requirement: int = buffer.get_u16()
				var ability_learned: int = buffer.get_u8()
				ability_list.append({'ABP': abp_requirement, 'ability': ability_learned})
			snes_data.job_levels.append(ability_list)
		#print(snes_data.job_levels)
		SpriteLoader.load_from_structs(snes_data)
		SpriteLoader.load_enemy_battle_sprites(snes_data, buffer)
		SpriteLoader.load_battle_bgs(snes_data, buffer)
		MapLoader.load_snes_rom(rom_snes)

func load_psx_folder(_dirname: String):
	pass

func load_psx_image(filename: String):
	# While it would technically be possible to load everything with no temporary files,
	# It is more convenient to unpack the small files we care about to the user:// directory
	var rom_psx := File.new()
	var error := rom_psx.open(filename, File.READ)
	if error == OK:
		var cd := loader_cd_image.new(rom_psx)
		for key in cd.directory:
			var s = key.trim_prefix('./')
			var re_match := psx_productcode_regex.search(s)
			if re_match:
				print(re_match.get_string(0))
		print(cd.directory)


func _ready():
	structdefs.merge(STRUCT.get_base_structarraytypes())
	structdefs.merge(STRUCT_SNES.get_structtypes())
	STRUCT.parse_struct_definitions_from_tsv_filename('res://data/SNES_save.tsv', structdefs)
	STRUCT.parse_struct_definitions_from_tsv_filename('res://data/SNES_other.tsv', structdefs)
	var _error := psx_productcode_regex.compile('(S[A-Z]{3}_\\d{3}\\.\\d{2});(\\d)')
	load_snes_rom(ROM_filename)
	# Debugging breakpoint
	pass

func _exit_tree() -> void:
	thread.wait_to_finish()