extends CanvasLayer

@onready var debug_toggle: Button = $HUDRoot/DebugToggle
@onready var debug_info: Label = $HUDRoot/DebugInfo
@onready var player: CharacterBody2D = get_parent().get_node("PlayerShip")
@onready var inventory_button: Button = $HUDRoot/ShipEquipmentPanel/Contents/InventoryButton
@onready var inventory_panel: Control = $HUDRoot/ShipInventoryPanel

var _debug_expanded := true
var _ability_buttons: Dictionary = {}
var _ability_bar: HBoxContainer
var _ability_ready_style: StyleBoxFlat
var _ability_blocked_style: StyleBoxFlat
var _inventory_clip: Control
var _sidebar: PanelContainer
var _sidebar_toggle: Button
var _sidebar_open := false
var _sidebar_tween: Tween
const SIDEBAR_WIDTH := 344.0

func _ready() -> void:
	var energy_indicator := Node2D.new()
	energy_indicator.name = "EnergyIndicator"
	energy_indicator.set_script(preload("res://scripts/game/ship_energy_indicator.gd"))
	energy_indicator.set("player", player)
	player.add_child(energy_indicator)
	var feedback := Control.new()
	feedback.name = "CombatFeedback"
	feedback.set_script(preload("res://scripts/ui/combat_feedback.gd"))
	feedback.set("player", player)
	$HUDRoot.add_child(feedback)
	debug_info.add_theme_font_size_override("font_size", 9)
	_create_sidebar()
	_inventory_clip = Control.new()
	_inventory_clip.name = "InventoryDrawer"
	_inventory_clip.clip_contents = true
	_inventory_clip.mouse_filter = Control.MOUSE_FILTER_IGNORE
	$HUDRoot.add_child(_inventory_clip)
	inventory_panel.reparent(_inventory_clip, false)
	inventory_panel.set("layout_mode", 0)
	inventory_panel.set_anchors_and_offsets_preset(Control.PRESET_TOP_LEFT)
	inventory_panel.size = Vector2(780, inventory_panel.get_combined_minimum_size().y)
	$HUDRoot.resized.connect(func() -> void: _layout_sidebar.call_deferred())
	_create_ability_bar()
	debug_toggle.pressed.connect(_toggle_debug)
	inventory_button.pressed.connect(_toggle_inventory)
	_update_debug_toggle()
	_layout_sidebar.call_deferred()

func _create_sidebar() -> void:
	_sidebar = PanelContainer.new()
	_sidebar.name = "CaptainShipDrawer"
	var style := StyleBoxFlat.new()
	style.bg_color = Color(0.018, 0.028, 0.043, 0.97)
	style.border_color = Color("52677e")
	style.set_border_width_all(1)
	style.set_content_margin_all(8)
	_sidebar.add_theme_stylebox_override("panel", style)
	$HUDRoot.add_child(_sidebar)
	var scroll := ScrollContainer.new()
	scroll.name = "Scroll"
	scroll.horizontal_scroll_mode = ScrollContainer.SCROLL_MODE_DISABLED
	_sidebar.add_child(scroll)
	var contents := VBoxContainer.new()
	contents.name = "Contents"
	contents.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	contents.add_theme_constant_override("separation", 8)
	scroll.add_child(contents)
	var captain := $HUDRoot/CaptainPanel as PanelContainer
	var equipment := $HUDRoot/ShipEquipmentPanel as PanelContainer
	for panel in [captain, equipment]:
		panel.set_anchors_and_offsets_preset(Control.PRESET_TOP_LEFT)
		panel.reparent(contents, false)
		panel.size_flags_horizontal = Control.SIZE_EXPAND_FILL
		panel.add_theme_stylebox_override("panel", StyleBoxEmpty.new())
		if panel == captain:
			contents.add_child(HSeparator.new())
	_sidebar_toggle = Button.new()
	_sidebar_toggle.name = "CaptainShipToggle"
	_sidebar_toggle.text = "KAPITAN / STATEK ◀"
	_sidebar_toggle.add_theme_font_size_override("font_size", 12)
	_sidebar_toggle.focus_mode = Control.FOCUS_NONE
	$HUDRoot.add_child(_sidebar_toggle)
	_sidebar_toggle.set_anchors_and_offsets_preset(Control.PRESET_TOP_RIGHT)
	_sidebar_toggle.offset_left = -210
	_sidebar_toggle.offset_right = -8
	_sidebar_toggle.offset_top = 8
	_sidebar_toggle.offset_bottom = 38
	_sidebar_toggle.pressed.connect(_toggle_sidebar)
	_sidebar.hide()

func _toggle_sidebar() -> void:
	_sidebar_open = not _sidebar_open
	if _sidebar_tween != null and _sidebar_tween.is_running():
		_sidebar_tween.kill()
	_sidebar_toggle.text = "ZAMKNIJ ▶" if _sidebar_open else "KAPITAN / STATEK ◀"
	if _sidebar_open:
		_sidebar.show()
	else:
		close_inventory()
	_sidebar_tween = create_tween()
	_sidebar_tween.tween_property(_sidebar, "position:x", $HUDRoot.size.x - SIDEBAR_WIDTH - 8 if _sidebar_open else $HUDRoot.size.x, 0.25).set_trans(Tween.TRANS_CUBIC).set_ease(Tween.EASE_OUT if _sidebar_open else Tween.EASE_IN)
	if not _sidebar_open:
		_sidebar_tween.tween_callback(_sidebar.hide)

func _layout_sidebar() -> void:
	if _sidebar_tween != null and _sidebar_tween.is_running():
		_sidebar_tween.kill()
	_sidebar.size = Vector2(SIDEBAR_WIDTH, maxf(100.0, $HUDRoot.size.y - 52.0))
	_sidebar.position = Vector2($HUDRoot.size.x - SIDEBAR_WIDTH - 8 if _sidebar_open else $HUDRoot.size.x, 44)
	_sidebar.visible = _sidebar_open
	_inventory_clip.size = inventory_panel.size
	_layout_inventory()

func _layout_inventory() -> void:
	if _inventory_clip == null:
		return
	var equipment := _sidebar.get_node("Scroll/Contents/ShipEquipmentPanel") as Control
	_inventory_clip.position = Vector2(_sidebar.position.x - _inventory_clip.size.x - 8, minf(equipment.global_position.y, maxf(8.0, $HUDRoot.size.y - inventory_panel.size.y - 8)))

func _process(_delta: float) -> void:
	_layout_inventory()
	_update_ability_bar()
	if not _debug_expanded:
		return
	var game := get_parent()
	debug_info.text = """POZIOM UKŁADU: %d
WROGOWIE: %d
PRĘDKOŚĆ: %.1f px/s

AKTUALNA REGENERACJA
Energia: %.1f pkt/s
Tarcze: %.1f pkt/s

%s""" % [
		GameState.system_level,
		int(game.call("get_remaining_enemies")),
		player.velocity.length(),
		float(player.get("energy_regeneration")) + float(player.call("get_solar_regeneration")),
		float(player.get("shield_regeneration")),
		_get_bonus_summary(),
	]

func _toggle_debug() -> void:
	_debug_expanded = not _debug_expanded
	debug_info.visible = _debug_expanded
	_update_debug_toggle()

func _update_debug_toggle() -> void:
	debug_toggle.text = "DEBUG [−]" if _debug_expanded else "DEBUG [+]"

func _toggle_inventory() -> void:
	if not _sidebar_open:
		_toggle_sidebar()
	inventory_panel.call("toggle_drawer")

func close_inventory() -> void:
	inventory_panel.call("close_drawer", true)

func _get_bonus_summary() -> String:
	var cooldown_bonus := 0.0
	var inventory := player.get_node("ShipInventory") as ShipInventory
	for item in inventory.weapon_slots + inventory.module_slots:
		if item != null:
			cooldown_bonus += item.get_stat_total("missile_cooldown_reduction")
	return """BONUSY (ADDONY + KAPITAN)
Obrażenia broni: %+.1f%%
Szansa na krytyk: %+.1f%%
Obrażenia krytyczne: %+.1f%%
Szansa na unik: %+.1f%%
Redukcja obrażeń: %+.1f%%
Odzysk tarcz z obrażeń: %.1f%%
Regeneracja energii: %+.1f pkt/s
Regeneracja tarcz: %+.1f pkt/s
Kadłub: %+.1f pkt
Tarcze: %+.1f pkt
Energia: %+.1f pkt
Prędkość maks.: %+.1f%%
Skrócenie cooldownu rakiet: %.2f s
Doświadczenie: %+.1f%%
Kredyty: %+.1f%%""" % [
		(float(player.call("get_weapon_damage_multiplier")) - 1.0) * 100.0,
		float(player.call("get_critical_chance")) * 100.0,
		float(player.get("critical_damage_bonus")) * 100.0,
		float(player.call("get_evasion_chance")) * 100.0,
		float(player.call("get_damage_reduction")) * 100.0,
		float(player.get("shield_on_damage_percent")),
		float(player.get("energy_regeneration")) - float(player.get("base_energy_regeneration")),
		float(player.get("shield_regeneration")) - float(player.get("base_shield_regeneration")),
		float(player.get("max_hull")) - float(player.get("base_max_hull")),
		float(player.get("max_shields")) - float(player.get("base_max_shields")),
		float(player.get("max_energy")) - float(player.get("base_max_energy")),
		(float(player.get("max_speed")) / float(player.get("base_max_speed")) - 1.0) * 100.0,
		cooldown_bonus,
		(float(player.get("experience_multiplier")) - 1.0) * 100.0,
		(float(player.get("credits_multiplier")) - 1.0) * 100.0,
	]

func _create_ability_bar() -> void:
	_ability_ready_style = _make_ability_style(true)
	_ability_blocked_style = _make_ability_style(false)
	var panel := PanelContainer.new()
	panel.name = "ActiveAbilities"
	$HUDRoot.add_child(panel)
	panel.set_anchors_and_offsets_preset(Control.PRESET_BOTTOM_LEFT)
	panel.offset_left = 12.0
	panel.offset_right = 12.0
	panel.offset_top = -54.0
	panel.offset_bottom = -12.0
	_ability_bar = HBoxContainer.new()
	_ability_bar.add_theme_constant_override("separation", 4)
	panel.add_child(_ability_bar)
	for index in 6:
		var button := Button.new()
		button.name = "Ability%d" % (index + 1)
		button.custom_minimum_size = Vector2(120, 40)
		button.add_theme_font_size_override("font_size", 11)
		button.pressed.connect(func() -> void: player.call("activate_ability", index))
		_ability_bar.add_child(button)
		_ability_buttons[index] = button
	_update_ability_bar()

func _update_ability_bar() -> void:
	var any_equipped := false
	for index in _ability_buttons:
		var button: Button = _ability_buttons[index]
		var ability: ActiveAbility = player.call("get_active_ability", index)
		button.visible = ability != null
		if ability == null:
			continue
		any_equipped = true
		var reason: String = player.call("ability_unavailable_reason", index)
		button.disabled = not reason.is_empty()
		button.text = "[%d] %s\n%s" % [index + 1, ability.display_name, "GOTOWE" if reason.is_empty() else reason]
		var style := _ability_ready_style if reason.is_empty() else _ability_blocked_style
		button.add_theme_stylebox_override("normal", style)
		button.add_theme_stylebox_override("disabled", style)
		button.add_theme_stylebox_override("hover", style)
		button.add_theme_color_override("font_color", Color("a5ffda"))
		button.add_theme_color_override("font_disabled_color", Color("a3aebb"))
		button.tooltip_text = ability.description + ("\n" + reason if not reason.is_empty() else "\nGotowe")
	_ability_bar.get_parent().visible = any_equipped

func _make_ability_style(ready: bool) -> StyleBoxFlat:
	var style := StyleBoxFlat.new()
	style.bg_color = Color("174237") if ready else Color("202731")
	style.border_color = Color("77e8bc") if ready else Color("526071")
	style.set_border_width_all(2 if ready else 1)
	style.set_content_margin_all(6)
	return style