## HUD.gd
## In-game heads-up display: minerals, gas, wave counter, Security System HP.
extends CanvasLayer

@onready var minerals_label: Label = $MineralsLabel
@onready var gas_label: Label = $GasLabel
@onready var wave_label: Label = $WaveLabel
@onready var ss_bar: ProgressBar = $SSBar
@onready var phase_label: Label = $PhaseLabel
@onready var next_wave_btn: Button = $NextWaveButton

const PLAYER_ID = 0  # local player

func _ready() -> void:
	EventBus.minerals_changed.connect(_on_minerals_changed)
	EventBus.gas_changed.connect(_on_gas_changed)
	EventBus.wave_started.connect(_on_wave_started)
	EventBus.security_system_damaged.connect(_on_ss_damaged)
	EventBus.phase_changed.connect(_on_phase_changed)
	next_wave_btn.pressed.connect(_on_next_wave_pressed)

func _on_minerals_changed(player_id: int, amount: int) -> void:
	if player_id == PLAYER_ID:
		minerals_label.text = "Minerals: %d" % amount

func _on_gas_changed(player_id: int, amount: int) -> void:
	if player_id == PLAYER_ID:
		gas_label.text = "Gas: %d" % amount

func _on_wave_started(wave_number: int) -> void:
	wave_label.text = "Wave %d / 31" % wave_number
	next_wave_btn.disabled = true

func _on_ss_damaged(_damage: int, hp_remaining: int) -> void:
	ss_bar.value = hp_remaining

func _on_phase_changed(new_phase: GameState.Phase) -> void:
	match new_phase:
		GameState.Phase.BUILD:
			phase_label.text = "BUILD PHASE"
			next_wave_btn.disabled = false
		GameState.Phase.COMBAT:
			phase_label.text = "COMBAT"
			next_wave_btn.disabled = true
		GameState.Phase.INCOME:
			phase_label.text = "INCOME"
		GameState.Phase.GAME_OVER:
			phase_label.text = "GAME OVER"
			next_wave_btn.disabled = true

func _on_next_wave_pressed() -> void:
	EventBus.emit_signal("next_wave_requested")