class_name MainUI
extends Control

@onready var pause_ui: PauseUI = $CanvasLayer/PauseUI
@onready var player_ui: PlayerUI = $CanvasLayer/PlayerUI
@onready var debug_ui: DebugUI = $CanvasLayer/DebugUI
@onready var level_up_ui: LevelUpUI = $CanvasLayer/LevelUpUI
@onready var low_hp_indicator: ColorRect = $CanvasLayer/LowHPIndicator

var elapsed_time: float


func _ready() -> void:
	pause_ui.visible = false
	player_ui.visible = true
	level_up_ui.visible = false
	low_hp_indicator.visible = false
	GlobalConst.sig_on_player_hp_change.connect(_on_player_hp_change)
	GlobalConst.sig_toggle_low_hp_shader.connect(_on_toggle_low_hp_shader)


func _process(delta: float) -> void:
	elapsed_time += delta
	if low_hp_indicator.visible:
		low_hp_indicator.material.set_shader_parameter("time", elapsed_time)


func _on_player_hp_change(hp: float, max_hp: float):
	var percent_hp = hp / max_hp * 100
	if percent_hp < 40:
		low_hp_indicator.visible = true
		low_hp_indicator.material.set_shader_parameter("damage_amount", 1 - (percent_hp / 100))
	else:
		low_hp_indicator.visible = false


func _on_toggle_low_hp_shader(toggled_on: bool):
	low_hp_indicator.visible = !low_hp_indicator.visible