@tool
extends CharacterBody3D
class_name PlayerController
## Third-person controller + focus highlight / attack feedback.
## @tool: only applies billboard look in the editor (no input/camera capture).

@export var move_speed: float = 6.0
@export var attack_range: float = 2.75 ## Longer than enemy melee so you can poke before they hit
@export var interact_range: float = 2.8
@export var attack_damage: int = 1
@export var mouse_sensitivity: float = 0.0025
@export var min_pitch_deg: float = -35.0
@export var max_pitch_deg: float = 55.0
@export var spring_length: float = 6.0
@export var camera_height: float = 1.62

signal interacted
signal attacked
signal focus_changed(target: Node, prompt: String)

@onready var _billboard: BillboardSprite = $BillboardSprite
@onready var _yaw_pivot: Node3D = $CameraYaw
@onready var _spring: SpringArm3D = $CameraYaw/SpringArm3D
@onready var _camera: Camera3D = $CameraYaw/SpringArm3D/Camera3D

var _locked: bool = false
var _pitch: float = deg_to_rad(-18.0)
var _focus: Node = null
var _attack_focus: Node = null
var _melee_vfx: MeleeVfx

func _ready() -> void:
	_apply_editor_billboard()
	if Engine.is_editor_hint():
		set_physics_process(false)
		set_process(false)
		set_process_unhandled_input(false)
		return
	add_to_group("player")
	camera_height = SpriteFit.WORLD_CAMERA_EYE
	if _spring:
		_spring.spring_length = spring_length
		_spring.collision_mask = 1
		_spring.position = Vector3(0.0, camera_height, 0.0)
	if _camera:
		_camera.current = true
		_camera.fov = 70.0
	_apply_pitch()
	# Scene load may already have opened a blocking VN (pause + visible mouse).
	# Capturing here would steal the cursor from Weiter / dialog UI.
	var ui0 := get_node_or_null("/root/UIRoot")
	if ui0 and ui0.has_method("is_dialog_open") and ui0.is_dialog_open():
		_set_mouse_captured(false)
	else:
		_set_mouse_captured(true)
	_apply_editor_billboard()
	_melee_vfx = MeleeVfx.new()
	_melee_vfx.name = "MeleeVfx"
	add_child(_melee_vfx)
	_melee_vfx.set_ranges(attack_range, interact_range)


func _apply_editor_billboard() -> void:
	if _billboard == null:
		_billboard = get_node_or_null("BillboardSprite") as BillboardSprite
	if _billboard == null:
		return
	_billboard.max_width = SpriteFit.WORLD_MAX_WIDTH
	_billboard.set_target_height(SpriteFit.WORLD_PLAYER_HEIGHT)
	if _billboard.texture == null:
		var tex: Texture2D = load("res://assets/sprites/placeholders/player.png")
		if tex:
			_billboard.set_texture(tex)

func _exit_tree() -> void:
	if Engine.is_editor_hint():
		return
	_clear_focus_highlights()
	_set_mouse_captured(false)

func _unhandled_input(event: InputEvent) -> void:
	if Engine.is_editor_hint() or _locked or get_tree().paused:
		return
	var ui := get_node_or_null("/root/UIRoot")
	if ui and ui.has_method("is_dialog_open") and ui.is_dialog_open():
		return
	if event is InputEventMouseMotion and Input.mouse_mode == Input.MOUSE_MODE_CAPTURED:
		var motion := event as InputEventMouseMotion
		_yaw_pivot.rotate_y(-motion.relative.x * mouse_sensitivity)
		_pitch = clampf(
			_pitch - motion.relative.y * mouse_sensitivity,
			deg_to_rad(min_pitch_deg),
			deg_to_rad(max_pitch_deg)
		)
		_apply_pitch()
	elif event is InputEventMouseButton and event.pressed:
		_set_mouse_captured(true)

func _physics_process(_delta: float) -> void:
	if _locked or get_tree().paused:
		velocity = Vector3.ZERO
		_update_focus()
		return
	var ui := get_node_or_null("/root/UIRoot")
	if ui and ui.has_method("is_dialog_open") and ui.is_dialog_open():
		velocity = Vector3.ZERO
		_update_focus()
		return

	var input := Vector2(
		Input.get_axis("move_left", "move_right"),
		Input.get_axis("move_up", "move_down")
	)
	var basis_yaw := _yaw_pivot.global_transform.basis
	var forward := -basis_yaw.z
	forward.y = 0.0
	forward = forward.normalized()
	var right := basis_yaw.x
	right.y = 0.0
	right = right.normalized()
	var dir := (right * input.x) + (forward * -input.y)
	if dir.length() > 1.0:
		dir = dir.normalized()
	var speed := move_speed
	if GameState.is_fat():
		speed *= 0.15
	elif GameState.is_glitched_slow():
		speed *= 0.55
	if GameState.is_shocked():
		velocity = Vector3.ZERO
		_update_focus()
		return
	velocity = dir * speed
	move_and_slide()

	_update_focus()

	if Input.is_action_just_pressed("interact"):
		_try_interact()
	if Input.is_action_just_pressed("attack"):
		_try_attack()

func lock_input(locked: bool) -> void:
	_locked = locked
	if locked:
		_set_mouse_captured(false)
	elif not get_tree().paused:
		_set_mouse_captured(true)

func set_gameplay_focused(focused: bool) -> void:
	if focused and not _locked:
		_set_mouse_captured(true)
	else:
		_set_mouse_captured(false)

func _apply_pitch() -> void:
	if _spring == null:
		return
	_spring.rotation.x = _pitch

func _set_mouse_captured(captured: bool) -> void:
	if captured:
		Input.mouse_mode = Input.MOUSE_MODE_CAPTURED
	else:
		Input.mouse_mode = Input.MOUSE_MODE_VISIBLE

func _interact_distance_to(body: Node3D) -> float:
	if body.has_method("get_interact_distance"):
		return float(body.call("get_interact_distance", global_position))
	return global_position.distance_to(body.global_position)

func _nearest_in_group(group: String, radius: float) -> Node:
	var best: Node = null
	var best_d := radius
	for body in get_tree().get_nodes_in_group(group):
		if body == self or not (body is Node3D):
			continue
		if not is_instance_valid(body):
			continue
		var d: float = _interact_distance_to(body as Node3D)
		if d <= best_d:
			best_d = d
			best = body
	return best

func _update_focus() -> void:
	if get_tree().paused or _locked or GameState.current_scene_id in ["title_screen", "death_screen", "intro_cutscene"]:
		_set_focus(null, null)
		return
	var interact := _nearest_in_group("interactable", interact_range)
	if interact != null and interact.is_in_group("enemy"):
		var talk := _nearest_talk_target(interact_range)
		if talk != null:
			interact = talk
	var attack := _nearest_in_group("enemy", attack_range)
	_set_focus(interact, attack)

func _nearest_talk_target(radius: float) -> Node:
	var best: Node = null
	var best_d := radius
	for body in get_tree().get_nodes_in_group("interactable"):
		if body == self or not (body is Node3D):
			continue
		if body.is_in_group("enemy"):
			continue
		var d: float = _interact_distance_to(body as Node3D)
		if d <= best_d:
			best_d = d
			best = body
	return best

func _set_focus(interact: Node, attack: Node) -> void:
	if interact == _focus and attack == _attack_focus:
		_emit_prompt()
		return
	_clear_focus_highlights()
	_focus = interact
	_attack_focus = attack
	if _focus != null and _focus.has_method("set_interaction_highlight"):
		_focus.set_interaction_highlight(true, Color(1.4, 1.35, 0.4))
	elif _focus != null:
		_highlight_node(_focus, true, Color(1.4, 1.35, 0.4))
	if _attack_focus != null and _attack_focus != _focus:
		if _attack_focus.has_method("set_interaction_highlight"):
			_attack_focus.set_interaction_highlight(true, Color(1.5, 0.45, 0.35))
		else:
			_highlight_node(_attack_focus, true, Color(1.5, 0.45, 0.35))
	_emit_prompt()

func _emit_prompt() -> void:
	## Interact stays as text prompt; attack/range is visual (rings + swing), not text.
	var prompt := ""
	if _focus != null:
		if _focus.has_method("get_interact_prompt"):
			prompt = str(_focus.get_interact_prompt())
		else:
			prompt = Locale.tr_key("prompt_use")
	var exit_hint := _near_exit_hint()
	if exit_hint != "" and prompt == "":
		prompt = exit_hint
	elif exit_hint != "" and prompt != "":
		prompt = "%s   %s" % [prompt, exit_hint]
	if _melee_vfx:
		_melee_vfx.show_attack_range(_attack_focus != null)
		_melee_vfx.show_interact_range(_focus != null)
	focus_changed.emit(_focus, prompt)
	var ui := get_node_or_null("/root/UIRoot")
	if ui and ui.has_method("set_interact_prompt"):
		ui.set_interact_prompt(prompt)

func _near_exit_hint() -> String:
	for body in get_tree().get_nodes_in_group("exit_trigger"):
		if body is Node3D and global_position.distance_to((body as Node3D).global_position) <= 3.5:
			return Locale.tr_key("prompt_exit")
	return ""

func _clear_focus_highlights() -> void:
	if _focus != null and is_instance_valid(_focus):
		if _focus.has_method("set_interaction_highlight"):
			_focus.set_interaction_highlight(false)
		else:
			_highlight_node(_focus, false)
	if _attack_focus != null and is_instance_valid(_attack_focus) and _attack_focus != _focus:
		if _attack_focus.has_method("set_interaction_highlight"):
			_attack_focus.set_interaction_highlight(false)
		else:
			_highlight_node(_attack_focus, false)

func _highlight_node(node: Node, enabled: bool, color: Color = Color(1.35, 1.25, 0.35)) -> void:
	var bill = node.get_node_or_null("BillboardSprite")
	if bill and bill.has_method("set_highlight"):
		bill.set_highlight(enabled, color)

func _try_interact() -> void:
	interacted.emit()
	var target := _focus
	if target == null:
		target = _nearest_talk_target(interact_range)
		if target == null:
			target = _nearest_in_group("interactable", interact_range)
	if target != null and target.has_method("on_interact"):
		_flash_feedback(target, Color(1.6, 1.6, 0.6))
		var ui := get_node_or_null("/root/UIRoot")
		if ui and ui.has_method("pulse_interact"):
			ui.pulse_interact()
		target.on_interact(self)

func _try_attack() -> void:
	attacked.emit()
	AudioDirector.play_hit()
	if _melee_vfx:
		_melee_vfx.play_swing()
	if _billboard and _billboard.has_method("flash"):
		_billboard.flash(Color(2.2, 2.0, 1.4), 0.1)
	var ui := get_node_or_null("/root/UIRoot")
	if ui and ui.has_method("pulse_attack"):
		ui.pulse_attack()
	var dmg := attack_damage
	if Inventory.has_item("tooth"):
		dmg = max(dmg, 2)
	if Inventory.has_item("moon_sword"):
		dmg = max(dmg, 99)
	if Inventory.has_item("wartchen"):
		dmg = max(dmg, 3)
	var hit_any := false
	var targets: Array = []
	if _attack_focus != null:
		targets.append(_attack_focus)
	for body in get_tree().get_nodes_in_group("enemy"):
		if body in targets:
			continue
		if body is Node3D and global_position.distance_to(body.global_position) <= attack_range:
			targets.append(body)
	for body in targets:
		if body is Node3D and global_position.distance_to(body.global_position) <= attack_range:
			if body.has_method("take_hit"):
				body.take_hit(dmg)
				_flash_feedback(body, Color(2.0, 0.5, 0.4))
				if _melee_vfx:
					_melee_vfx.burst_at((body as Node3D).global_position, true)
				hit_any = true
	if not hit_any:
		# Miss puff at swing tip in front of player
		var tip := global_position + (-_yaw_pivot.global_transform.basis.z) * attack_range
		tip.y = global_position.y
		if _melee_vfx:
			_melee_vfx.burst_at(tip, false)

func _flash_feedback(node: Node, color: Color) -> void:
	var bill = node.get_node_or_null("BillboardSprite")
	if bill and bill.has_method("flash"):
		bill.flash(color, 0.15)