extends Control

signal back_pressed

const YAML_SOURCES: Array[String] = [
	"res://assets/sources.yaml",
	# Future sources:
	# "res://assets/audio/audio-sources.yaml",
	# "res://assets/sprites/sprite-sources.yaml",
]

@onready
var scroll_container: ScrollContainer = $MarginContainer/VBoxContainer/ScrollContainer
@onready
var credits_text: RichTextLabel = $MarginContainer/VBoxContainer/ScrollContainer/CreditsText
@onready var back_button: Button = $MarginContainer/VBoxContainer/BackButton


func _ready() -> void:
	DebugManager.log_info("Credits scene ready", "Credits")
	_load_and_display_credits()
	back_button.grab_focus()
	DebugManager.log_info("Back button focused for gamepad support", "Credits")


func _load_and_display_credits() -> void:
	"""Load credits from multiple YAML files and display formatted output"""
	var all_credits_data: Dictionary = {}

	# Load all YAML source files
	for yaml_path in YAML_SOURCES:
		var yaml_data: Dictionary = _load_yaml_file(yaml_path)
		if not yaml_data.is_empty():
			_merge_credits_data(all_credits_data, yaml_data)

	# Generate and display formatted credits
	_display_formatted_credits(all_credits_data)


func _load_yaml_file(yaml_path: String) -> Dictionary:
	"""Load and parse a YAML file into a dictionary structure"""
	var file := FileAccess.open(yaml_path, FileAccess.READ)

	if not file:
		DebugManager.log_warn(
			"Could not open YAML file: %s" % yaml_path, "Credits"
		)
		return {}

	var content: String = file.get_as_text()
	file.close()

	DebugManager.log_info("Loaded YAML file: %s" % yaml_path, "Credits")
	return _parse_yaml_content(content)


func _parse_yaml_content(yaml_content: String) -> Dictionary:
	"""Parse YAML content into structured dictionary"""
	var result: Dictionary = {}
	var lines: Array = yaml_content.split("\n")
	var current_section: String = ""
	var current_subsection: String = ""
	var current_asset: String = ""
	var current_asset_data: Dictionary = {}

	for line in lines:
		var trimmed: String = line.strip_edges()

		# Skip comments and empty lines
		if trimmed.is_empty() or trimmed.begins_with("#"):
			continue

		# Top-level section (audio, sprites, textures, etc.)
		if (
			not line.begins_with(" ")
			and not line.begins_with("\t")
			and trimmed.ends_with(":")
		):
			if current_asset and not current_asset_data.is_empty():
				_store_asset_data(
					result,
					current_section,
					current_subsection,
					current_asset,
					current_asset_data
				)
			current_section = trimmed.trim_suffix(":")
			current_subsection = ""
			current_asset = ""
			current_asset_data = {}
			if not result.has(current_section):
				result[current_section] = {}

		# Subsection (music, sfx, characters, etc.)
		elif (
			line.begins_with("  ")
			and not line.begins_with("    ")
			and trimmed.ends_with(":")
		):
			if current_asset and not current_asset_data.is_empty():
				_store_asset_data(
					result,
					current_section,
					current_subsection,
					current_asset,
					current_asset_data
				)
			current_subsection = trimmed.trim_suffix(":")
			current_asset = ""
			current_asset_data = {}
			if (
				current_section
				and not result[current_section].has(current_subsection)
			):
				result[current_section][current_subsection] = {}

		# Asset name
		elif trimmed.begins_with('"') and trimmed.contains('":'):
			if current_asset and not current_asset_data.is_empty():
				_store_asset_data(
					result,
					current_section,
					current_subsection,
					current_asset,
					current_asset_data
				)
			var parts: Array = trimmed.split('"')
			current_asset = parts[1] if parts.size() > 1 else ""
			current_asset_data = {}

		# Asset properties
		elif ":" in trimmed:
			var parts: Array = trimmed.split(":", false, 1)
			if parts.size() == 2:
				var key: String = parts[0].strip_edges()
				var value: String = (
					parts[1].strip_edges().trim_prefix('"').trim_suffix('"')
				)
				if value and value != '""':
					current_asset_data[key] = value

	# Store last asset
	if current_asset and not current_asset_data.is_empty():
		_store_asset_data(
			result,
			current_section,
			current_subsection,
			current_asset,
			current_asset_data
		)

	return result


func _store_asset_data(
	result: Dictionary,
	section: String,
	subsection: String,
	asset: String,
	data: Dictionary
) -> void:
	"""Store parsed asset data into result dictionary"""
	if not section or not asset:
		return

	if subsection:
		if not result[section].has(subsection):
			result[section][subsection] = {}
		result[section][subsection][asset] = data
	else:
		result[section][asset] = data


func _merge_credits_data(target: Dictionary, source: Dictionary) -> void:
	"""Merge source credits data into target dictionary"""
	for section in source:
		if not target.has(section):
			target[section] = {}
		for subsection in source[section]:
			if source[section][subsection] is Dictionary:
				if not target[section].has(subsection):
					target[section][subsection] = {}
				for asset in source[section][subsection]:
					target[section][subsection][asset] = source[section][subsection][asset]


func _display_formatted_credits(credits_data: Dictionary) -> void:
	"""Generate BBCode formatted credits from parsed data"""
	if not credits_text:
		DebugManager.log_error(
			"Credits text node is null, cannot display credits", "Credits"
		)
		return

	var credits_bbcode: String = "[center][b][font_size=32]CREDITS[/font_size][/b][/center]\n\n"

	# Audio section
	if credits_data.has("audio"):
		credits_bbcode += "[b][font_size=24]AUDIO[/font_size][/b]\n\n"
		credits_bbcode += _format_section(credits_data["audio"])

	# Sprites section
	if credits_data.has("sprites"):
		credits_bbcode += "[b][font_size=24]GRAPHICS[/font_size][/b]\n\n"
		credits_bbcode += _format_section(credits_data["sprites"])

	# Textures section
	if credits_data.has("textures"):
		if not credits_data.has("sprites"):
			credits_bbcode += "[b][font_size=24]GRAPHICS[/font_size][/b]\n\n"
		credits_bbcode += _format_section(credits_data["textures"])

	# Game development credits
	credits_bbcode += "[b][font_size=24]GAME DEVELOPMENT[/font_size][/b]\n\n"
	credits_bbcode += "[i]Developed with Godot Engine 4.4[/i]\n"
	credits_bbcode += "[url=https://godotengine.org]https://godotengine.org[/url]\n\n"

	credits_text.bbcode_enabled = true
	credits_text.text = credits_bbcode
	DebugManager.log_info("Credits displayed successfully", "Credits")


func _format_section(section_data: Dictionary) -> String:
	"""Format a credits section with subsections and assets"""
	var result: String = ""

	for subsection in section_data:
		if section_data[subsection] is Dictionary:
			# Add subsection header
			var subsection_title: String = subsection.capitalize()
			result += "[i]" + subsection_title + "[/i]\n"

			# Add assets in this subsection
			for asset in section_data[subsection]:
				var asset_data: Dictionary = section_data[subsection][asset]
				result += _format_asset(asset_data)

			result += "\n"

	return result


func _format_asset(asset_data: Dictionary) -> String:
	"""Format a single asset's credit information"""
	var result: String = ""

	if asset_data.has("attribution") and asset_data["attribution"]:
		result += "[b]" + asset_data["attribution"] + "[/b]\n"

	if asset_data.has("license") and asset_data["license"]:
		result += "License: " + asset_data["license"] + "\n"

	if asset_data.has("source") and asset_data["source"]:
		result += "[url=" + asset_data["source"] + "]Source[/url]\n"

	if result:
		result += "\n"

	return result


func _on_back_button_pressed() -> void:
	AudioManager.play_ui_click()
	DebugManager.log_info("Back button pressed", "Credits")
	GameManager.exit_to_main_menu()


func _input(event: InputEvent) -> void:
	if (
		event.is_action_pressed("ui_back")
		or event.is_action_pressed("action_east")
	):
		_on_back_button_pressed()
	elif event.is_action_pressed("move_up") or event.is_action_pressed("ui_up"):
		_scroll_credits(-50.0)
	elif (
		event.is_action_pressed("move_down")
		or event.is_action_pressed("ui_down")
	):
		_scroll_credits(50.0)


func _scroll_credits(amount: float) -> void:
	"""Scroll the credits by the specified amount"""
	var current_scroll: float = scroll_container.scroll_vertical
	scroll_container.scroll_vertical = int(current_scroll + amount)
	DebugManager.log_debug(
		"Scrolled credits to: %d" % scroll_container.scroll_vertical, "Credits"
	)