class_name OverheadHealthBar
extends Node2D

@export var health_component_path: NodePath = ^"../HealthComponent"
@export var bar_size := Vector2(58.0, 7.0)
@export var border_width := 1.0
@export var background_color := Color(0.05, 0.04, 0.045, 0.82)
@export var fill_color := Color(0.95, 0.16, 0.13, 0.95)
@export var low_health_color := Color(1.0, 0.62, 0.15, 0.98)
@export var border_color := Color(0.96, 0.9, 0.78, 0.88)
@export var hide_when_depleted := true

var _current := 1
var _maximum := 1

@onready var _health_component: Node = get_node_or_null(health_component_path)


func _ready() -> void:
	z_index = max(z_index, 30)
	if _health_component != null:
		if _health_component.has_signal("health_changed") and not _health_component.is_connected("health_changed", _on_health_changed):
			_health_component.connect("health_changed", _on_health_changed)
		_on_health_changed(int(_health_component.get("current")), int(_health_component.get("maximum")))
	else:
		queue_redraw()


func health_ratio() -> float:
	return clampf(float(_current) / float(maxi(1, _maximum)), 0.0, 1.0)


func _on_health_changed(current: int, maximum: int) -> void:
	_current = clampi(current, 0, maxi(1, maximum))
	_maximum = maxi(1, maximum)
	visible = _current > 0 or not hide_when_depleted
	queue_redraw()


func _draw() -> void:
	if hide_when_depleted and _current <= 0:
		return
	var rect := Rect2(-bar_size * 0.5, bar_size)
	draw_rect(rect, background_color, true)
	var ratio := health_ratio()
	var fill_rect := Rect2(rect.position + Vector2(border_width, border_width), Vector2(maxf(0.0, (bar_size.x - border_width * 2.0) * ratio), maxf(0.0, bar_size.y - border_width * 2.0)))
	draw_rect(fill_rect, low_health_color if ratio <= 0.32 else fill_color, true)
	draw_rect(rect, border_color, false, border_width)