extends Control

@export var min_zoom: float = 0.3
@export var max_zoom: float = 3.0

@onready var content: Node2D = $MapContent
@onready var open_button: IconButton = get_node("../MapButton")
@onready var recenter_button: IconButton = $RecenterButton
@onready var close_button: IconButton = $CloseButton
@onready var fleet: Node2D = get_node("../../Fleet")

var touches: Dictionary = {}
var pinch_active: bool = false
var pinch_start_distance: float = 0.0
var pinch_start_zoom: float = 1.0


func _ready() -> void:
	open_button.pressed.connect(open_map)
	recenter_button.pressed.connect(recenter_view)
	close_button.pressed.connect(close_map)


func open_map() -> void:
	visible = true
	open_button.visible = false
	recenter_view()


func close_map() -> void:
	visible = false
	open_button.visible = true
	touches.clear()
	pinch_active = false


func recenter_view() -> void:
	var fleet_local: Vector2 = fleet.get_centroid() * content.WORLD_TO_LOCAL
	var viewport_center: Vector2 = get_viewport_rect().size / 2.0
	content.position = viewport_center - fleet_local * content.scale.x


func _input(event: InputEvent) -> void:
	if not visible:
		return

	if event is InputEventScreenTouch:
		_handle_touch(event)
		get_viewport().set_input_as_handled()
	elif event is InputEventScreenDrag:
		_handle_drag(event)
		get_viewport().set_input_as_handled()
	elif event is InputEventMagnifyGesture:
		_handle_magnify(event)
		get_viewport().set_input_as_handled()


func _handle_touch(event: InputEventScreenTouch) -> void:
	if event.pressed:
		touches[event.index] = event.position
		if touches.size() == 2:
			pinch_active = true
			var positions: Array = touches.values()
			pinch_start_distance = positions[0].distance_to(positions[1])
			pinch_start_zoom = content.scale.x
	else:
		touches.erase(event.index)
		if touches.size() < 2:
			pinch_active = false


func _handle_drag(event: InputEventScreenDrag) -> void:
	if not touches.has(event.index):
		return
	var previous_pos: Vector2 = touches[event.index]
	touches[event.index] = event.position

	if pinch_active and touches.size() == 2 and pinch_start_distance > 0.0:
		var positions: Array = touches.values()
		var current_distance: float = positions[0].distance_to(positions[1])
		var new_zoom: float = pinch_start_zoom * (current_distance / max(pinch_start_distance, 1.0))
		_set_zoom(new_zoom)
	elif touches.size() == 1:
		content.position += event.position - previous_pos


func _handle_magnify(event: InputEventMagnifyGesture) -> void:
	_set_zoom(content.scale.x * event.factor)


func _set_zoom(z: float) -> void:
	var clamped: float = clamp(z, min_zoom, max_zoom)
	content.scale = Vector2(clamped, clamped)