settled-reach/client/ui/main_menu.gd

extends Control
## #258: Main menu — New Game / Continue / Load Game / Quit.
## New Game: shows character select panel (D-085 save dir created after archetype chosen).
## Continue: loads most recent save directory.
## Load Game: shows sorted save list for manual selection (#257).
## #588: Character archetype selection — panel shown between New Game click and game load.

const GAME_SCENE := "res://scenes/main.tscn"
const CHARACTER_SELECT_SCENE := "res://scenes/character_select.tscn"

const BG_COLOR := Color(0.05, 0.05, 0.08, 1.0)
const TITLE_COLOR := Color("#c8d0e0")
const SUBTITLE_COLOR := Color("#8890a0")
const BTN_NORMAL_COLOR := Color("#e8c547")
const BTN_DISABLED_COLOR := Color("#4a5060")
const FONT_SIZE_TITLE := 36
const FONT_SIZE_SUBTITLE := 14
const FONT_SIZE_BTN := 15

@onready var _new_game_btn: Button = $VBox/NewGameBtn
@onready var _continue_btn: Button = $VBox/ContinueBtn
@onready var _load_game_btn: Button = $VBox/LoadGameBtn
@onready var _quit_btn: Button = $VBox/QuitBtn
@onready var _load_panel: Control = $LoadGamePanel
@onready var _saves_list: VBoxContainer = $LoadGamePanel/VBox/SavesScroll/SavesList
@onready var _load_back_btn: Button = $LoadGamePanel/VBox/BackBtn

var _char_select: Control = null  # Instantiated on demand


func _ready() -> void:
	_new_game_btn.pressed.connect(_on_new_game)
	_continue_btn.pressed.connect(_on_continue)
	_load_game_btn.pressed.connect(_on_load_game_browse)
	_quit_btn.pressed.connect(_on_quit)
	_load_back_btn.pressed.connect(_on_load_back)
	_load_panel.visible = false
	_refresh_continue_state()


func _refresh_continue_state() -> void:
	var saves := SessionManager.list_game_dirs()
	_continue_btn.disabled = saves.is_empty()
	_load_game_btn.disabled = saves.is_empty()


func _on_new_game() -> void:
	# #588: Show character select before creating the save directory.
	# ESC on character select cancels with no directory created.
	GameState.pending_load_path = ""
	_show_character_select()


func _show_character_select() -> void:
	if _char_select != null and is_instance_valid(_char_select):
		_char_select.queue_free()
	var scene := load(CHARACTER_SELECT_SCENE) as PackedScene
	if scene == null:
		push_error("MainMenu: failed to load character_select.tscn")
		return
	_char_select = scene.instantiate()
	add_child(_char_select)
	_char_select.archetype_confirmed.connect(_on_archetype_confirmed)
	_char_select.archetype_cancelled.connect(_on_archetype_cancelled)


func _on_archetype_confirmed(archetype: String) -> void:
	if _char_select != null and is_instance_valid(_char_select):
		_char_select.queue_free()
		_char_select = null
	# Set archetype before new_game() so SessionManager can persist it.
	GameState.character_archetype = archetype
	var game_id := SessionManager.new_game()
	if game_id.is_empty():
		push_error("MainMenu: new_game() failed to create save directory — cannot start")
		return
	SessionManager.save_character_archetype(game_id, archetype)
	get_tree().change_scene_to_file(GAME_SCENE)


func _on_archetype_cancelled() -> void:
	if _char_select != null and is_instance_valid(_char_select):
		_char_select.queue_free()
		_char_select = null


func _on_continue() -> void:
	GameState.pending_load_path = ""  # clear stale load path from previous Load selection
	var saves := SessionManager.list_game_dirs()
	if saves.is_empty():
		return
	SessionManager.resume_game(saves[0].game_id)
	get_tree().change_scene_to_file(GAME_SCENE)


var _list_built: bool = false  # guard against queue_free() race on rapid reopen


func _on_load_game_browse() -> void:
	if not _list_built:
		_build_saves_list()
		_list_built = true
	_load_panel.visible = true


func _on_load_back() -> void:
	_load_panel.visible = false
	_list_built = false  # allow rebuild on next open


func _on_quit() -> void:
	get_tree().quit()


## Build the saves list panel from existing save directories, sorted by date (newest first).
func _build_saves_list() -> void:
	for child in _saves_list.get_children():
		child.queue_free()

	var saves := SessionManager.list_game_dirs()
	if saves.is_empty():
		var lbl := Label.new()
		lbl.text = UIStrings.get_text("menu.load_game_empty")
		lbl.add_theme_color_override("font_color", Color(BTN_DISABLED_COLOR))
		lbl.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
		_saves_list.add_child(lbl)
		return

	for save in saves:
		var btn := Button.new()
		btn.text = _format_save_entry(save)
		btn.add_theme_font_size_override("font_size", FONT_SIZE_BTN)
		var has_save_file: bool = not save.get("newest_save", "").is_empty()
		if has_save_file:
			btn.add_theme_color_override("font_color", BTN_NORMAL_COLOR)
			btn.pressed.connect(_on_save_selected.bind(save))
		else:
			btn.add_theme_color_override("font_color", BTN_DISABLED_COLOR)
			btn.disabled = true
		_saves_list.add_child(btn)


func _on_save_selected(save: Dictionary) -> void:
	var game_id: String = save.get("game_id", "")
	var save_file: String = save.get("newest_save", "")
	if save_file.is_empty():
		push_error("MainMenu: save entry '%s' has no newest_save — load cancelled" % game_id)
		return
	SessionManager.resume_game(game_id)
	GameState.pending_load_path = "user://saves/" + game_id + "/" + save_file
	get_tree().change_scene_to_file(GAME_SCENE)


## Format a save entry for display. game_id format: YYYYMMDD-HHMMSS-hex6.
static func _format_save_entry(save: Dictionary) -> String:
	var game_id: String = save.get("game_id", "")
	var parts := game_id.split("-")
	if parts.size() >= 2 and parts[0].length() == 8 and parts[1].length() == 6:
		var d := parts[0]
		var t := parts[1]
		return "%s-%s-%s  %s:%s:%s" % [
			d.substr(0, 4), d.substr(4, 2), d.substr(6, 2),
			t.substr(0, 2), t.substr(2, 2), t.substr(4, 2),
		]
	return game_id