class_name P91SessionPresenter
extends RefCounted

var host: Control

func _init(runtime_host: Control) -> void:
	host = runtime_host

func render(snapshot: Dictionary, actions: Dictionary = {}) -> void:
	if snapshot.is_empty() or not snapshot.has("screen"):
		host.render_binding_error()
		return
	_reset_legacy_references()
	clear_root(host.display_root)
	var page: int = host.page
	var background_texture: Texture2D = host.FIELD_BACKGROUND if page in host.BATTLE_PRESENTATION_PAGES else host.YARD_BACKGROUND
	host.add_background(background_texture)
	if host.portrait_layout():
		host.render_portrait_notice()
	else:
		_dispatch_legacy_page(page)
	if host.restart_confirmation:
		host.render_restart_confirmation()

func _reset_legacy_references() -> void:
	host.render_pending = false
	host.front_sprite = null
	host.rear_sprite = null
	host.added_rear_sprite = null
	host.enemy_sprite = null
	host.battle_feedback_label = null
	host.battle_feedback_vfx = null
	host.victory_front_sprite = null
	host.victory_rear_sprite = null
	host.victory_enemy_sprite = null
	host.projectile = null

func _dispatch_legacy_page(page: int) -> void:
	match page:
		host.AppPage.BOOT: host.render_boot()
		host.AppPage.TITLE: host.render_title()
		host.AppPage.MAIN_MENU: host.render_main_menu()
		host.AppPage.GAME_INTRO: host.render_game_intro()
		host.AppPage.SETTINGS: host.render_settings()
		host.AppPage.FIRST_MISSION: host.render_first_mission()
		host.AppPage.RECRUIT_SELECTION: host.render_recruit_selection()
		host.AppPage.FRONT_SELECTION: host.render_role_selection(true)
		host.AppPage.REAR_SELECTION: host.render_role_selection(false)
		host.AppPage.FORMATION_REVIEW: host.render_formation_review()
		host.AppPage.YARD: host.render_yard()
		host.AppPage.BATTLE, host.AppPage.SECOND_BATTLE, host.AppPage.THIRD_BATTLE, host.AppPage.FOURTH_BATTLE, host.AppPage.FIFTH_BATTLE: host.render_battle()
		host.AppPage.VICTORY: host.render_victory()
		host.AppPage.ADAPTATION: host.render_adaptation()
		host.AppPage.SECOND_RESULT: host.render_second_result()
		host.AppPage.GUILD_RETURN: host.render_guild_return()
		host.AppPage.SESSION_RESULT: host.render_session_result()
		host.AppPage.ROUTE_BOARD: host.render_route_board()
		host.AppPage.ROUTE_REVIEW: host.render_route_review()
		host.AppPage.SECOND_CYCLE_RESULT: host.render_second_cycle_result()
		host.AppPage.TRAINING: host.render_training()
		host.AppPage.TRAINING_REVIEW: host.render_training_review()
		host.AppPage.THIRD_CYCLE_RESULT: host.render_third_cycle_result()

func clear_root(root: Control) -> void:
	for child in root.get_children():
		root.remove_child(child)
		child.queue_free()

func add_background(texture: Texture2D) -> void:
	var background := TextureRect.new()
	background.name = "WorldBackground"
	background.texture = texture
	background.expand_mode = TextureRect.EXPAND_IGNORE_SIZE
	background.stretch_mode = TextureRect.STRETCH_KEEP_ASPECT_COVERED
	background.texture_filter = CanvasItem.TEXTURE_FILTER_LINEAR_WITH_MIPMAPS
	background.set_anchors_and_offsets_preset(Control.PRESET_FULL_RECT)
	background.mouse_filter = Control.MOUSE_FILTER_IGNORE
	host.display_root.add_child(background)