extends Node3D
class_name Buff

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


class BuffInfo:
    var name: String
    var duration_max: float
    var duration: float
    var ignore_pause: bool

var buff_map: Dictionary = {} #buff信息


func _process(delta):
    for buff_name in buff_map:
        var buff_info = buff_map[buff_name]
        if has_buff("pause") and buff_name!="pause" and !buff_info.ignore_pause:
            continue
        if buff_info.duration_max == -1:
            trigger_buff_effect(buff_info, "update")
        else:
            if buff_info.duration == 0:
                trigger_buff_effect(buff_info, "second")
            buff_info.duration += delta
            if buff_info.duration >= buff_info.duration_max:
                buff_info.duration = buff_info.duration_max
                trigger_buff_effect(buff_info, "update")
                remove_buff(buff_name)
            else:
                trigger_buff_effect(buff_info, "update")


func trigger_buff_effect(buff: BuffInfo, trigger_name: String):
    var buff_name: String     = buff.name
    var function_name: String = "on_%s_%s" % [trigger_name, buff_name]
    if has_method(function_name):
        var rate: float = buff.duration/buff.duration_max
        call(function_name, rate)


func has_buff(buff_name: String) -> bool:
    return buff_name in buff_map


func add_buff(buff_name: String, duration: float, ignore_pause: bool = false):
    var buff: BuffInfo
    if buff_name in buff_map:
        buff = buff_map[buff_name]
    else:
        buff = BuffInfo.new()
        buff.name = buff_name
        buff_map[buff_name] = buff
    buff.duration_max = duration
    buff.duration = 0
    buff.ignore_pause = ignore_pause
    trigger_buff_effect(buff, "start")


func remove_buff(buff_name: String):
    if buff_name in buff_map:
        var buff = buff_map[buff_name]
        trigger_buff_effect(buff, "end")
        buff_map.erase(buff_name)


#==具体实现==
#位移
func on_end_hit_back(rate)->void: status.hit_back_speed = 0


func on_end_hit_up(rate)->void: status.hit_up_speed = 0


func on_start_jumping(rate)->void: status.is_jumping = true


func on_end_jumping(rate)->void: status.is_jumping = false


func on_start_rising(rate)->void: status.is_rising = true


func on_end_rising(rate)->void: status.is_rising = false


func on_start_floating(rate)->void:
    status.is_floating = true
    add_buff("rising", 0.1)


func on_update_floating(rate) -> void:
    if not status.is_on_floor or status.is_rising:
        return
    if has_buff("hit_down"):
        character.add_attack(character.id(), status.move_dir, ResourceManager.cfg_attack_rebound)
        remove_buff("hit_down")
    else:
        remove_buff("floating")
        add_buff("stagger", 3)
    return


func on_end_floating(rate)->void: status.is_floating = false


#战斗状态
func on_start_die(rate)->void:
    status.is_dead = true
    SignalManager.character_die.emit(status.id)


func on_end_die(rate)->void: add_buff("die2", -1)


func on_update_die2(rate)->void: if status.is_on_floor: remove_buff("die2")


func on_end_die2(rate)->void:
    effect.cast_corpse()
    Global.character_mgr.destroy_character(status.id)


func on_start_stagger(rate)->void: status.is_stagger = true


func on_end_stagger(rate)->void: status.is_stagger = false


func on_end_shield_recover_cd(rate)->void: add_buff("shield_recover", -1)


func on_update_shield_recover(rate)->void:
    var shield_add: float = get_process_delta_time() * status.cfg.shield.recover_speed
    shield_add = min(status.shield_max - status.shield, shield_add)
    if shield_add == status.shield_max - status.shield:
        remove_buff("shield_recover")
    character.set_status("shield", status.shield+shield_add)


func on_end_mp_recover_cd(rate)->void: add_buff("mp_recover", -1)


func on_update_mp_recover(rate)->void:
    var mp_add: float = get_process_delta_time() * status.cfg.mp.recover_speed
    if mp_add == 0:
        remove_buff("mp_recover")
    elif mp_add > 0:
        mp_add = min(status.mp_sub_max - status.mp_sub, mp_add)
        character.add_mp(mp_add)
    elif mp_add < 0:
        mp_add = max(-status.mp_sub, mp_add)
        if mp_add == 0:
            remove_buff("mp_recoveres://config/attack/rebound.tres")
            character.set_status("mp_sub", status.mp_sub+mp_add)


func on_end_stun_recover_break_cd(rate)->void: add_buff("stun_recover_break", -1)


func on_update_stun_recover_break(rate)->void:
    var stun_sub: float = get_process_delta_time() * status.cfg.stun.recover_break_speed
    stun_sub = min(status.stun, stun_sub)
    character.set_status("stun", status.stun-stun_sub)
    if status.stun == 0:
        remove_buff("stun_recover_break")
        character.set_status("is_stun", false)


func on_end_stun_recover_cd(rate)->void: add_buff("stun_recover", -1)


func on_update_stun_recover(rate)->void:
    var stun_sub: float = get_process_delta_time() * status.cfg.stun.recover_speed
    stun_sub = min(status.stun, stun_sub)
    character.set_status("stun", status.stun-stun_sub)
    if status.stun == 0:
        remove_buff("stun_recover")


func on_update_weapon_index_change(rate)->void: character.set_status("weapon_index_change_rate", rate)


func on_end_weapon_index_change(rate)->void:
    var weapon_index: int = status.weapon_index + status.weapon_index_change_dir
    var weapon_len: int   = len(status.weapon_list)
    weapon_index = (weapon_index % weapon_len + weapon_len) % weapon_len
    character.set_status("weapon_index", weapon_index)
    character.set_status("weapon_index_change_dir", 0)


#表现
func on_start_freeze(rate)->void: status.is_pause = true


func on_end_freeze(rate)->void: status.is_pause = false


func on_second_pause(rate)->void: status.is_pause = true


func on_end_pause(rate)->void: status.is_pause = false


func on_start_flash_white(rate)->void: status.flash_white_rate = 1


func on_update_flash_white(rate)->void: status.flash_white_rate = 1 - rate


func on_end_flash_white(rate)->void: status.flash_white_rate = 0


func on_update_shake_x(rate)->void:
    var shake_rate: float = 0.5 * status.pause_time
    status.shake_offset = Vector3((sin(rate * PI * 5) - 0.5)*shake_rate, 0, 0);


func on_end_shake_x(rate)->void: status.shake_offset = Vector3.ZERO


func on_start_deformation(rate)->void: status.deformation_rate = 1;


func on_update_deformation(rate)->void: status.deformation_rate = 1 - rate


func on_end_deformation(rate)->void: status.deformation_rate = 0