extends PanelContainer
class_name AbilityButton
## Individual ability/action button for the action bar
## Shows icon, keybind, cooldown overlay, and tooltip

signal pressed()
signal hovered()

# References
@onready var icon: TextureRect = $MarginContainer/VBoxContainer/Icon
@onready var keybind_label: Label = $MarginContainer/VBoxContainer/KeybindLabel
@onready var cooldown_overlay: ColorRect = $MarginContainer/VBoxContainer/Icon/CooldownOverlay
@onready var cooldown_label: Label = $MarginContainer/VBoxContainer/Icon/CooldownLabel

# Data
var ability_icon: Texture2D = null
var keybind_text: String = ""
var ability_name: String = ""
var ability_description: String = ""

# Cooldown tracking
var is_on_cooldown: bool = false
var cooldown_remaining: float = 0.0
var cooldown_total: float = 0.0

# Colors
const COOLDOWN_COLOR = Color(0.0, 0.0, 0.0, 0.7)  # Dark overlay during cooldown
const EMPTY_SLOT_COLOR = Color(0.3, 0.3, 0.3, 0.5)  # Gray for empty slots

func _ready():
	# Setup default appearance
	cooldown_overlay.visible = false
	cooldown_label.visible = false

	# Connect mouse events for tooltip
	mouse_entered.connect(_on_mouse_entered)
	mouse_exited.connect(_on_mouse_exited)

	_update_appearance()

func _process(delta):
	if is_on_cooldown:
		cooldown_remaining -= delta
		if cooldown_remaining <= 0:
			cooldown_remaining = 0
			is_on_cooldown = false
			_update_cooldown_display()
		else:
			_update_cooldown_display()

## Set the ability data
func set_ability(ability_texture: Texture2D, keybind: String, name: String = "", description: String = ""):
	ability_icon = ability_texture
	keybind_text = keybind
	ability_name = name
	ability_description = description
	_update_appearance()

## Clear the ability (make slot empty)
func clear_ability():
	ability_icon = null
	ability_name = ""
	ability_description = ""
	_update_appearance()

## Set only the keybind (for empty slots)
func set_keybind(keybind: String):
	keybind_text = keybind
	_update_appearance()

## Start a cooldown animation
func start_cooldown(remaining: float, total: float = -1):
	# If total is provided, use it; otherwise use remaining as both
	if total > 0:
		cooldown_total = total
	else:
		# Only set cooldown_total if we're starting a new cooldown
		if not is_on_cooldown:
			cooldown_total = remaining

	is_on_cooldown = true
	cooldown_remaining = remaining
	_update_cooldown_display()

## Update visual appearance based on current state
func _update_appearance():
	if not is_node_ready():
		return

	# Update icon
	if ability_icon:
		icon.texture = ability_icon
		icon.modulate = Color.WHITE
	else:
		icon.texture = null
		icon.modulate = EMPTY_SLOT_COLOR

	# Update keybind label
	if keybind_label:
		keybind_label.text = keybind_text

## Update cooldown overlay and label
func _update_cooldown_display():
	if not is_node_ready():
		return

	if is_on_cooldown:
		cooldown_overlay.visible = true
		cooldown_overlay.color = COOLDOWN_COLOR

		# Show timer for cooldowns > 1 second
		if cooldown_total > 1.0:
			cooldown_label.visible = true
			cooldown_label.text = str(ceil(cooldown_remaining))
		else:
			cooldown_label.visible = false

		# Animate overlay height based on remaining cooldown
		var percent_remaining = cooldown_remaining / cooldown_total
		cooldown_overlay.size.y = icon.size.y * percent_remaining
	else:
		cooldown_overlay.visible = false
		cooldown_label.visible = false

## Mouse hover handlers for tooltip
func _on_mouse_entered():
	hovered.emit()
	# Tooltip will be implemented later

func _on_mouse_exited():
	# Hide tooltip
	pass

## Handle button press
func _gui_input(event):
	if event is InputEventMouseButton:
		if event.pressed and event.button_index == MOUSE_BUTTON_LEFT:
			if not is_on_cooldown and ability_icon != null:
				pressed.emit()