extends Control

const ApiClientScript := preload("res://scripts/services/api_client.gd")

const AUTO_USERNAME := "13800000001"
const AUTO_PASSWORD := "123456"
const DESIGN_SIZE := Vector2(640.0, 960.0)
const LOADING_BG_PATH := "res://assets/replacement/loading/loading_bg.jpg"
const LOADING_BAR_BG_PATH := "res://assets/replacement/loading/loading_bar_bg.png"
const LOADING_BAR_FILL_PATH := "res://assets/replacement/loading/loading_bar_fill.png"
const LOADING_BAR_SOURCE_SIZE := Vector2(1117.0, 223.0)
const LOADING_BAR_TARGET_WIDTH := 500.0
const LOADING_BAR_SIZE := Vector2(
	LOADING_BAR_TARGET_WIDTH,
	LOADING_BAR_TARGET_WIDTH * LOADING_BAR_SOURCE_SIZE.y / LOADING_BAR_SOURCE_SIZE.x
)
const LOADING_BAR_POSITION := Vector2((DESIGN_SIZE.x - LOADING_BAR_SIZE.x) * 0.5, 792.0)
const STARTUP_ASSET_PATHS := [
	"res://scenes/ui/game_scene.tscn",
	"res://assets/egret/common/common.png",
	"res://assets/egret/assets/common.png",
	"res://assets/egret/assets/game/menu2/menu3.png",
	"res://assets/egret/assets/game/friend/friend.png",
	"res://assets/egret/assets/game/rank/rank.png",
	"res://assets/egret/assets/game/building/building.png",
	"res://assets/egret/assets/game/landup/landup.png",
	"res://assets/egret/assets/game/sign/sign.png",
	"res://assets/egret/assets/game/roleinfo/roleinfo.png",
	"res://assets/egret/assets/game/createrole/createrole.png",
	"res://assets/egret/assets/common2.png",
	"res://assets/egret/assets/game/gift/onLineGift.png",
	"res://assets/egret/assets/game/lottery/lottery.png",
	"res://assets/egret/assets/game/mofahecheng/mofahecheng.png",
	"res://assets/egret/assets/game/battlePet/battle_pet.png",
	"res://assets/egret/assets/game/pay/pay_com.png",
	"res://assets/egret/assets/game/pay/pay_bg.png",
	"res://assets/egret/land/land0.png",
	"res://assets/egret/land/land1.png",
	"res://assets/egret/land/land-1.png",
	"res://assets/egret/assets/icon/land/land2.png",
	"res://assets/egret/assets/icon/land/land3.png",
	"res://assets/egret/common/land_light_png.tres",
	"res://assets/egret/common/bag_bg_png.tres",
	"res://assets/egret/common/bag_line_png.tres",
	"res://assets/egret/common/log_itembg_png.tres",
	"res://assets/egret/common/m_phase_clock_png.tres",
	"res://assets/egret/common/m_phase_pro_bar_png.tres",
	"res://assets/egret/common/m_phase_pro_bg_png.tres",
	"res://assets/egret/menu/menu_p_plant.png",
	"res://assets/egret/menu/menu_p_gain.png",
	"res://assets/egret/menu/menu_p_uproot.png",
	"res://assets/egret/menu/menu_p_manure.png",
	"res://assets/egret/assets/game/menu/menu_p_put_water.png",
	"res://assets/egret/menu/menu_p_die_bug.png",
	"res://assets/egret/menu/menu_p_die_grass.png",
	"res://assets/egret/assets/game/menu/menu_p_steal.png",
	"res://assets/egret/assets/game/menu/menu_p_put_bug.png",
	"res://assets/egret/assets/game/menu/menu_p_put_grass.png",
	"res://assets/egret/menu/plant_state1.png",
	"res://assets/egret/menu/plant_state2.png",
	"res://assets/egret/menu/plant_state3.png",
	"res://assets/replacement/menu2/market.png",
	"res://assets/replacement/panels/panel_content.png",
	"res://assets/replacement/panels/panel_shell.png",
]

@export var main_scene: PackedScene

var _current_scene: Node
var _api_client: ApiClient
var _loading_layer: Control
var _loading_fill_clip: Control
var _loading_percent_label: Label
var _preloaded_resources: Array[Resource] = []


func _ready() -> void:
	_build_loading_ui()
	_set_loading_progress(0.0)
	_api_client = ApiClientScript.new()
	add_child(_api_client)
	await get_tree().process_frame
	await _preload_startup_assets()
	var player_data := await _auto_login()
	if player_data.is_empty():
		_set_loading_text("登录失败")
		return
	_set_loading_progress(1.0)
	await get_tree().process_frame
	_show_main_scene(player_data)


func _auto_login() -> Dictionary:
	_set_loading_progress(0.86)
	var login_path := str(ProjectSettings.get_setting("farm_game/api/login_path", "user/login"))
	var result := await _api_client.post_json(login_path, {
		"username": AUTO_USERNAME,
		"password": AUTO_PASSWORD
	})
	if not result.get("ok", false):
		push_error("Auto login failed. HTTP %s, game status %s" % [
			result.get("status", 0),
			result.get("game_status", "unknown")
		])
		return {}
	_set_loading_progress(0.94)

	var body = result.get("body", {})
	var player_data: Dictionary = {}
	if body is Dictionary and body.get("data", {}) is Dictionary:
		player_data = body["data"]
	return player_data


func _show_main_scene(player_data: Dictionary) -> void:
	if main_scene == null:
		push_error("Missing main scene.")
		return

	var main := main_scene.instantiate()
	if main.has_method("setup"):
		main.setup(player_data)
	_show_scene(main)
	_hide_loading_ui()
	_preloaded_resources.clear()


func _show_scene(scene: Node) -> void:
	if _current_scene != null:
		_current_scene.queue_free()
	_current_scene = scene
	add_child(_current_scene)


func _build_loading_ui() -> void:
	if _loading_layer != null and is_instance_valid(_loading_layer):
		return
	_loading_layer = Control.new()
	_loading_layer.name = "LoadingLayer"
	_loading_layer.size = DESIGN_SIZE
	_loading_layer.mouse_filter = Control.MOUSE_FILTER_STOP
	add_child(_loading_layer)

	var background := TextureRect.new()
	background.name = "Background"
	var background_texture := load(LOADING_BG_PATH) as Texture2D
	background.texture = background_texture
	var background_size := _fit_cover_size(background_texture.get_size(), DESIGN_SIZE)
	background.expand_mode = TextureRect.EXPAND_IGNORE_SIZE
	background.stretch_mode = TextureRect.STRETCH_SCALE
	background.position = (DESIGN_SIZE - background_size) * 0.5
	background.size = background_size
	background.mouse_filter = Control.MOUSE_FILTER_IGNORE
	_loading_layer.add_child(background)

	var bar_group := Control.new()
	bar_group.name = "ProgressBar"
	bar_group.position = LOADING_BAR_POSITION
	bar_group.size = LOADING_BAR_SIZE
	bar_group.mouse_filter = Control.MOUSE_FILTER_IGNORE
	_loading_layer.add_child(bar_group)

	var bar_bg := TextureRect.new()
	bar_bg.name = "Bg"
	bar_bg.texture = load(LOADING_BAR_BG_PATH) as Texture2D
	bar_bg.expand_mode = TextureRect.EXPAND_IGNORE_SIZE
	bar_bg.stretch_mode = TextureRect.STRETCH_SCALE
	bar_bg.size = LOADING_BAR_SIZE
	bar_bg.mouse_filter = Control.MOUSE_FILTER_IGNORE
	bar_group.add_child(bar_bg)

	var fill_texture := load(LOADING_BAR_FILL_PATH) as Texture2D
	_loading_fill_clip = Control.new()
	_loading_fill_clip.name = "FillClip"
	_loading_fill_clip.position = Vector2.ZERO
	_loading_fill_clip.size = Vector2.ZERO
	_loading_fill_clip.clip_contents = true
	_loading_fill_clip.mouse_filter = Control.MOUSE_FILTER_IGNORE
	bar_group.add_child(_loading_fill_clip)

	var fill := TextureRect.new()
	fill.name = "Fill"
	fill.texture = fill_texture
	fill.expand_mode = TextureRect.EXPAND_IGNORE_SIZE
	fill.stretch_mode = TextureRect.STRETCH_SCALE
	fill.size = LOADING_BAR_SIZE
	fill.mouse_filter = Control.MOUSE_FILTER_IGNORE
	_loading_fill_clip.add_child(fill)

	_loading_percent_label = Label.new()
	_loading_percent_label.name = "Percent"
	_loading_percent_label.position = Vector2.ZERO
	_loading_percent_label.size = LOADING_BAR_SIZE
	_loading_percent_label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	_loading_percent_label.vertical_alignment = VERTICAL_ALIGNMENT_CENTER
	_loading_percent_label.mouse_filter = Control.MOUSE_FILTER_IGNORE
	_loading_percent_label.add_theme_font_size_override("font_size", 30)
	_loading_percent_label.add_theme_color_override("font_color", Color.WHITE)
	_loading_percent_label.add_theme_color_override("font_outline_color", Color.html("#5b2a0e"))
	_loading_percent_label.add_theme_constant_override("outline_size", 4)
	bar_group.add_child(_loading_percent_label)


func _fit_cover_size(source_size: Vector2, target_size: Vector2) -> Vector2:
	if source_size.x <= 0.0 or source_size.y <= 0.0:
		return target_size
	var scale := maxf(target_size.x / source_size.x, target_size.y / source_size.y)
	return source_size * scale


func _preload_startup_assets() -> void:
	var total := maxi(STARTUP_ASSET_PATHS.size(), 1)
	for index in range(STARTUP_ASSET_PATHS.size()):
		var path := str(STARTUP_ASSET_PATHS[index])
		await _preload_asset(path, index, total)
	_set_loading_progress(0.84)


func _preload_asset(path: String, index: int, total: int) -> void:
	if not ResourceLoader.exists(path):
		push_warning("Startup asset missing: %s" % path)
		_set_loading_progress(_asset_progress(index + 1.0, total))
		return
	var request_error := ResourceLoader.load_threaded_request(path)
	if request_error != OK:
		var resource := load(path) as Resource
		if resource != null:
			_preloaded_resources.append(resource)
		_set_loading_progress(_asset_progress(index + 1.0, total))
		await get_tree().process_frame
		return
	var progress: Array = []
	while true:
		progress.clear()
		var status := ResourceLoader.load_threaded_get_status(path, progress)
		var item_progress := 0.0
		if not progress.is_empty():
			item_progress = clampf(float(progress[0]), 0.0, 1.0)
		_set_loading_progress(_asset_progress(float(index) + item_progress, total))
		if status == ResourceLoader.THREAD_LOAD_LOADED:
			var loaded_resource := ResourceLoader.load_threaded_get(path)
			if loaded_resource is Resource:
				_preloaded_resources.append(loaded_resource)
			_set_loading_progress(_asset_progress(index + 1.0, total))
			return
		if status == ResourceLoader.THREAD_LOAD_FAILED or status == ResourceLoader.THREAD_LOAD_INVALID_RESOURCE:
			push_warning("Startup asset failed to load: %s" % path)
			_set_loading_progress(_asset_progress(index + 1.0, total))
			return
		await get_tree().process_frame


func _asset_progress(value: float, total: int) -> float:
	return 0.05 + clampf(value / maxf(float(total), 1.0), 0.0, 1.0) * 0.79


func _set_loading_progress(progress: float) -> void:
	var normalized := clampf(progress, 0.0, 1.0)
	if _loading_fill_clip != null and is_instance_valid(_loading_fill_clip):
		_loading_fill_clip.size = Vector2(LOADING_BAR_SIZE.x * normalized, LOADING_BAR_SIZE.y)
	if _loading_percent_label != null and is_instance_valid(_loading_percent_label):
		_loading_percent_label.text = "%d%%" % roundi(normalized * 100.0)


func _set_loading_text(text: String) -> void:
	if _loading_percent_label != null and is_instance_valid(_loading_percent_label):
		_loading_percent_label.text = text


func _hide_loading_ui() -> void:
	if _loading_layer == null or not is_instance_valid(_loading_layer):
		return
	_loading_layer.queue_free()
	_loading_layer = null
	_loading_fill_clip = null
	_loading_percent_label = null