extends Panel

# Pulse movement
var pulse_speed := 120.0
var pulse_speed_increase := 15.0
var pulse_x := 0.0
var pulse_active := false
var pulse_gap := 1.0
var pulse_gap_decrease := 0.05
var pulse_gap_min := 0.3

# Block zone (shrinks per floor, not per block)
var block_zone_shrink := 3.0
var block_zone_min := 12.0

# Visual
var base_color: Color

# State
var active := false
var pulses_blocked := 0

signal pulse_blocked
signal doors_closing

func _ready():
	# Block zone on right side of screen
	var bz = $TargetZone
	bz.size = Vector2(50, size.y - 40)
	bz.position = Vector2(size.x - bz.size.x - 10, 20)

	# Pulse line (hidden until first pulse)
	var sl = $SweepLine
	sl.size = Vector2(4, size.y - 40)
	sl.position = Vector2(0, 20)
	sl.visible = false

	# AI face
	var face = $AIFace
	face.position = Vector2(0, 0)
	face.size = Vector2(size.x, 30)
	face.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	face.text = ">:)"

	# Duplicate the StyleBoxFlat so flash tweens don't bleed into other panels
	var style = get_theme_stylebox("panel") as StyleBoxFlat
	if style:
		style = style.duplicate()
		add_theme_stylebox_override("panel", style)
		base_color = style.bg_color

# --- Per-floor lifecycle ---

func start():
	active = true
	pulses_blocked = 0
	pulse_speed = 120.0
	pulse_gap = 1.0
	$AIFace.text = ">:)"
	$TargetZone.visible = true

func stop():
	active = false
	pulse_active = false
	$SweepLine.visible = false

func shrink_block_zone():
	var bz = $TargetZone
	var new_width = max(bz.size.x - block_zone_shrink, block_zone_min)
	bz.size.x = new_width
	bz.position.x = size.x - new_width - 10

# --- Pulse logic ---

# Called by elevator_panel when a survivor reaches the door.
func launch_pulse():
	if not active:
		return
	pulse_x = 0.0
	pulse_active = true
	$SweepLine.visible = true
	$SweepLine.position.x = 0
	$AIFace.text = ">:)"

func get_pulse_gap() -> float:
	return pulse_gap

func _process(delta):
	if not active or not pulse_active:
		return

	pulse_x += pulse_speed * delta
	$SweepLine.position.x = pulse_x

	# Pulse reached the far side unblocked: AI wins, doors close
	if pulse_x >= size.x:
		pulse_active = false
		$SweepLine.visible = false
		$AIFace.text = ":D"
		flash(Color.RED)
		active = false
		doors_closing.emit()

# Called by elevator_panel when player presses BLOCK.
func attempt_block() -> bool:
	if not pulse_active:
		return false  # no pulse on screen, button does nothing

	var bz = $TargetZone
	var bz_left = bz.position.x
	var bz_right = bz.position.x + bz.size.x

	if pulse_x >= bz_left and pulse_x <= bz_right:
		# Blocked: doors stay open, this survivor gets in
		pulse_active = false
		pulses_blocked += 1
		pulse_speed += pulse_speed_increase
		pulse_gap = max(pulse_gap - pulse_gap_decrease, pulse_gap_min)
		$SweepLine.visible = false
		$AIFace.text = ">:("
		flash(Color.GREEN)
		pulse_blocked.emit()
		return true
	else:
		# Mistimed: same result as letting it through
		pulse_active = false
		$SweepLine.visible = false
		$AIFace.text = ":D"
		flash(Color.RED)
		active = false
		doors_closing.emit()
		return false

# --- Display helpers ---

func flash(color: Color):
	var style = get_theme_stylebox("panel") as StyleBoxFlat
	if not style:
		return
	style.bg_color = color
	var tween = create_tween()
	tween.tween_property(style, "bg_color", base_color, 0.3)

func show_countdown():
	stop()
	$AIFace.text = "3"
	var tween = create_tween()
	tween.tween_interval(0.6)
	tween.tween_callback(func(): $AIFace.text = "2")
	tween.tween_interval(0.6)
	tween.tween_callback(func(): $AIFace.text = "1")
	tween.tween_interval(0.6)
	tween.tween_callback(func(): $AIFace.text = "CLOSED")

func show_win():
	stop()
	$TargetZone.visible = false
	$AIFace.text = "ESCAPED"
	flash(Color.GREEN)

func show_loss(message: String):
	stop()
	$TargetZone.visible = false
	$AIFace.text = message
	flash(Color.RED)