class_name PlayerCombatController
extends Node3D

const SLASH_REST_ANGLE := Vector3(-0.35, 0.0, 0.0)

@export var player: CharacterBody3D
@export var simulation_manager: Node
@export var combat_presentation: Node
@export var sword: Node3D

var attack_range := 2.4
@export_range(30.0, 160.0, 5.0) var attack_angle := 90.0
@export var dash_speed := 22.0
@export var dash_duration := 0.18
@export var dash_cooldown_seconds := 1.1

var attack_cooldown_seconds := 0.55
var attack_timer := 0.0
var dash_duration_remaining := 0.0
var dash_cooldown_remaining := 0.0
var dashing := false
var dash_velocity := Vector3.ZERO
var _swing_tween: Tween
var _references_resolved := false


func _ready() -> void:
	process_physics_priority = -1
	if sword != null:
		sword.rotation = SLASH_REST_ANGLE
	var definition := SimulationItems.get_weapon(SimulationIds.ITEM_SWORD)
	if definition != null:
		attack_cooldown_seconds = definition.attack_cooldown
		attack_range = definition.reach


func _resolve_references() -> void:
	if simulation_manager == null:
		simulation_manager = get_tree().get_first_node_in_group("simulation_manager")
	if combat_presentation == null:
		combat_presentation = get_tree().get_first_node_in_group("combat_presentation")
	_references_resolved = true


func _physics_process(delta: float) -> void:
	if not _references_resolved:
		_resolve_references()
	if simulation_manager != null and simulation_manager.has_method("update_player_combatant"):
		simulation_manager.update_player_combatant(player.global_position)
	_advance_timers(delta)
	if _player_is_downed():
		attack_timer = 0.0
		dash_duration_remaining = 0.0
		dash_cooldown_remaining = 0.0
		dashing = false
		return
	if dashing:
		return
	if Input.is_action_just_pressed("attack"):
		_perform_attack()
	if Input.is_action_just_pressed("dash"):
		_perform_dash()


func _advance_timers(delta: float) -> void:
	if not is_finite(delta) or delta <= 0.0:
		return
	attack_timer = maxf(attack_timer - delta, 0.0)
	dash_duration_remaining = maxf(dash_duration_remaining - delta, 0.0)
	dash_cooldown_remaining = maxf(dash_cooldown_remaining - delta, 0.0)
	if dashing and dash_duration_remaining <= 0.0:
		dashing = false


func _player_is_downed() -> bool:
	return (
		simulation_manager != null
		and simulation_manager.has_method("player_is_downed")
		and simulation_manager.player_is_downed()
	)


func _perform_attack() -> void:
	if attack_timer > 0.0 or not _simulation_attack_ready():
		return
	attack_timer = attack_cooldown_seconds
	_play_swing()
	var facing := -player.global_transform.basis.z
	var hostile: CombatantStateRecord = null
	if combat_presentation != null and combat_presentation.has_method("find_hostile_in_arc"):
		hostile = combat_presentation.find_hostile_in_arc(
			player.global_position, facing, attack_range, attack_angle
		)
	if hostile == null:
		return
	if simulation_manager != null and simulation_manager.has_method("player_attack"):
		var damage: float = simulation_manager.player_attack(hostile.get_combatant_id())
		if damage > 0.0:
			_emit_combat_feedback("Struck %s" % hostile.get_display_name(), damage)


func _perform_dash() -> void:
	if dash_cooldown_remaining > 0.0 or _player_is_downed():
		return
	dash_duration_remaining = dash_duration
	dash_cooldown_remaining = maxf(dash_cooldown_seconds, dash_duration)
	dashing = true
	var facing := -player.global_transform.basis.z
	facing.y = 0.0
	facing = facing.normalized()
	dash_velocity = facing * dash_speed
	dash_velocity.y = 0.0


func _simulation_attack_ready() -> bool:
	if simulation_manager == null or not simulation_manager.has_method("player_attack_ready"):
		return true
	return simulation_manager.player_attack_ready()


func _play_swing() -> void:
	if sword == null:
		return
	if _swing_tween != null and _swing_tween.is_valid():
		_swing_tween.kill()
	sword.rotation = SLASH_REST_ANGLE
	_swing_tween = create_tween()
	_swing_tween.set_trans(Tween.TRANS_QUAD).set_ease(Tween.EASE_OUT)
	_swing_tween.tween_property(sword, "rotation", SLASH_REST_ANGLE + Vector3(-1.6, 0.6, 0.0), 0.12)
	_swing_tween.tween_property(sword, "rotation", SLASH_REST_ANGLE, 0.2)


func _emit_combat_feedback(heading: String, damage: float) -> void:
	if player != null and player.has_signal("interaction_feedback"):
		player.interaction_feedback.emit(heading, "Dealt %.0f damage." % damage, true)


func is_attacking() -> bool:
	return attack_timer > 0.0


func is_dashing() -> bool:
	return dashing


func get_dash_velocity() -> Vector3:
	return dash_velocity if dashing else Vector3.ZERO


func get_dash_cooldown_remaining() -> float:
	return dash_cooldown_remaining