extends AnimationPlayer
class_name Skill

@onready var character: Character = (get_owner() as Character)
@onready var view: View = (%View as View)
@onready var status: Status = (%Status as Status)
@onready var effect: Effect = (%Effect as Effect)

var skill_map: Dictionary = {} #input -> skillCfg[] 


func init():
    cancel_skill()


func add_skill(action: String, skillCfg: SkillCfg):
    if not action in skill_map:
        skill_map[action] = []
    skill_map[action].append(skillCfg)


func remove_skill(action: String, skillCfg: SkillCfg) -> void:
    if not action in skill_map:
        return
    skill_map[action].filter(func(cfg): return cfg != skillCfg)


func _process(delta):
    if status.is_skill_running and status.is_pause == is_playing():
        if status.is_pause: pause();
        else: play();


func _on_animation_finished(_anim_name):
    cancel_skill()


func cast_skill(cfg: SkillCfg, cast_dir: Vector2):
    break_skill()
    if cast_dir.length() == 0:
        cast_dir = Vector2.RIGHT if status.is_right else Vector2.LEFT
    if !cfg.free_lock and status.target:
        var target: Character = Global.character_mgr.get_character(status.target)
        if target:
            cast_dir = character.pos2D().direction_to(target.pos2D()).normalized()

    var animation_name: String = "animation_library/%s" % Util.get_resource_name(cfg)
    if has_animation(animation_name):
        status.speed_up_rate = -1
        status.skill_move_speed = 0
        status.skill_float_speed = 0
        status.is_free_control = false
        status.is_free_turn = false
        status.is_skill_running = true
        status.skill_cfg = cfg
        status.skill_dir = cast_dir
        status.break_level = Enum.EBreakLevel.None
        status.speed_down_push_rate = 0
        status.skill_move_stop = false
        status.is_speed_y_freeze = false
        if cast_dir.x != 0: status.is_right = cast_dir.x > 0
        play(animation_name, -1, Setting.animation_speed_scale)
    else:
        print("技能animation不存在", animation_name)


func break_skill():
    stop()
    status.speed_up_rate = 0
    status.skill_move_speed = 0
    status.skill_float_speed = 0
    status.is_free_control = true
    status.is_free_turn = true
    status.is_skill_running = false
    status.skill_cfg = null
    status.break_level = Enum.EBreakLevel.Walk
    status.speed_down_push_rate = 0
    status.skill_move_stop = false
    status.is_speed_y_freeze = false
    effect.release_effect()


func cancel_skill():
    break_skill()
    view.reset()


func on_attack_miss():
    # 攻击未命中时跳帧
    advance(Setting.animation_frame_rate)


func on_check_ground(frame_offset: int) -> void:
    if status.is_on_floor:
        # 落地检测成功时跳帧
        advance(Setting.animation_frame_rate)
    else:
        # 落地检测失败时回退半帧
        var frame: int       = int(current_animation_position / Setting.animation_frame_rate) - frame_offset
        frame = frame if frame >= 0 else 0
        var frame_pos: float = frame * Setting.animation_frame_rate
        seek(frame_pos- Setting.animation_frame_rate / 2, true, true)


func on_cast_sub_character() -> void:
    var cfg: SkillCfg = status.skill_cfg
    if not cfg or not cfg.sub_character: 
        return
    var pos: Vector3 = character.pos()
    var dir: Vector2 = status.skill_dir
    Global.character_mgr.create_character(cfg.sub_character, status.team, pos, dir, status.id)