class_name P1HomeScreen
extends Control
## P1: home con i due tendoni/percorsi.

signal juggle_requested(focal: Control)
signal gym_requested(focal: Control)
signal exit_requested
signal sign_drop_started
signal sign_landed
signal sign_bounced

const HOME_BG := preload("res://menus/assets/common/1_sfondo.png")
const CLOUDS := preload("res://menus/assets/common/1_nuvole.png")
const BLUE_TENT := preload("res://menus/assets/p1/1_tendone_1.png")
const RED_TENT := preload("res://menus/assets/p1/1_tendone_2.png")
const BACK_BUTTON := preload("res://menus/assets/common/pulsante_indietro.png")
const SETTINGS_BUTTON := preload("res://menus/assets/common/pulsante_rotellina.png")
const CIRCUS_SIGN_PANEL := preload("res://menus/assets/p1/upendi_circus_sign_panel.png")
const CIRCUS_SIGN_ROPES := preload("res://menus/assets/p1/upendi_circus_sign_ropes.png")


func _ready() -> void:
	set_anchors_and_offsets_preset(Control.PRESET_FULL_RECT)
	_build()


func _build() -> void:
	MenuUI.add_full_texture(self, HOME_BG)
	MenuUI.add_full_texture(self, CLOUDS, MenuUI.ambient_material(1.0, 0.16))
	_add_sign()

	var blue := _add_tent_button(BLUE_TENT, Vector2(0.29, 0.46))
	blue.pressed.connect(func(): juggle_requested.emit(blue))
	var red := _add_tent_button(RED_TENT, Vector2(0.71, 0.46))
	red.pressed.connect(func(): gym_requested.emit(red))

	_add_bottom_bar()
	MenuUI.add_image(self, SETTINGS_BUTTON, Vector2(0.91, 0.13), Vector2(0.09, 0.14))
	if not OS.has_feature("web"):
		var exit_button := MenuUI.add_image_button(self, BACK_BUTTON, Vector2(0.075, 0.13), Vector2(0.09, 0.14))
		exit_button.pressed.connect(func(): exit_requested.emit())


func _add_tent_button(texture: Texture2D, center: Vector2) -> TextureButton:
	var button := MenuUI.add_image_button(self, texture, center, Vector2(0.36, 0.59))
	var star_material := MenuUI.tent_star_material()
	button.material = star_material
	button.tooltip_text = "Apri questo percorso"
	# L'hover non altera più geometria e hitbox del tendone: mette in risalto
	# esclusivamente la stella, tramite il parametro dello shader.
	button.mouse_entered.connect(func(): star_material.set_shader_parameter("hover_strength", 1.0))
	button.mouse_exited.connect(func(): star_material.set_shader_parameter("hover_strength", 0.0))
	return button


func _add_bottom_bar() -> void:
	var bar := ColorRect.new()
	bar.color = Color("#f1dfbd")
	bar.mouse_filter = Control.MOUSE_FILTER_IGNORE
	add_child(bar)
	MenuUI.set_normalized_rect(bar, Vector2(0.50, 0.885), Vector2(1.0, 0.23))

	for item in [[0.774, 3.0], [0.787, 2.0]]:
		var rule := ColorRect.new()
		rule.color = Color("#28201c")
		rule.mouse_filter = Control.MOUSE_FILTER_IGNORE
		add_child(rule)
		MenuUI.set_normalized_rect(rule, Vector2(0.50, item[0]), Vector2(1.0, item[1] / 720.0))

	MenuUI.add_label(self, "Tocca un tendone e scopri il gioco!", Vector2(0.38, 0.89), Vector2(0.66, 0.10), 24)


func _add_sign() -> void:
	# Il pannello si muove, mentre le funi restano ancorate al bordo superiore.
	# Separare i due livelli conserva la texture disegnata originale senza lasciare
	# un vuoto quando il pannello supera verso il basso il punto di riposo.
	var rig := Control.new()
	rig.mouse_filter = Control.MOUSE_FILTER_IGNORE
	add_child(rig)
	MenuUI.set_normalized_rect(rig, Vector2(0.50, 0.17), Vector2(0.43, 0.34))

	_add_sign_layer(rig, CIRCUS_SIGN_ROPES)
	var panel := _add_sign_layer(rig, CIRCUS_SIGN_PANEL)
	var final_y := panel.position.y
	panel.position.y = final_y - panel.size.y * 1.15

	var tween := create_tween()
	# Il menu viene messo in pausa dalla shell: l'ingresso deve continuare comunque.
	tween.set_pause_mode(Tween.TWEEN_PAUSE_PROCESS)
	# Discesa rapida, atterraggio evidente e rimbalzo elastico.
	call_deferred("_emit_sign_drop_started")
	tween.tween_property(panel, "position:y", final_y + panel.size.y * 0.11, 1.10).set_trans(Tween.TRANS_QUAD).set_ease(Tween.EASE_IN)
	# L'impatto è sincronizzato con la massima estensione, prima del ritorno elastico.
	tween.tween_callback(func(): sign_landed.emit())
	tween.tween_property(panel, "position:y", final_y, 0.50).set_trans(Tween.TRANS_BOUNCE).set_ease(Tween.EASE_OUT)
	tween.tween_callback(func(): sign_bounced.emit())


func _add_sign_layer(parent: Control, texture: Texture2D) -> TextureRect:
	var layer := TextureRect.new()
	layer.texture = texture
	layer.expand_mode = TextureRect.EXPAND_IGNORE_SIZE
	layer.stretch_mode = TextureRect.STRETCH_KEEP_ASPECT_CENTERED
	layer.mouse_filter = Control.MOUSE_FILTER_IGNORE
	parent.add_child(layer)
	layer.set_anchors_and_offsets_preset(Control.PRESET_FULL_RECT)
	return layer


func _emit_sign_drop_started() -> void:
	if is_inside_tree():
		sign_drop_started.emit()