extends Node3D
class_name Battle

@export var hit_back_limit_curve: Curve

@onready var character: Character = (get_owner() as Character)
@onready var status: Status = (%Status as Status)
@onready var skill: Skill = (%Skill as Skill)
@onready var move: Move = (%Move as Move)


class HitInfo:
    var from: int
    var to: int
    var dir: Vector2
    var attack: AttackCfg


func attack1() -> void:
    if not status.skill_cfg:
        return
    var attack: AttackCfg        = status.skill_cfg.get_attack1()
    var attack_box: AttackBoxCfg = status.skill_cfg.get_attack1_box()
    _attack(attack, attack_box)


func attack2() -> void:
    if not status.skill_cfg:
        return
    var attack: AttackCfg        = status.skill_cfg.get_attack2()
    var attack_box: AttackBoxCfg = status.skill_cfg.get_attack2_box()
    _attack(attack, attack_box)


func character_attack1() -> bool:
    var attack: AttackCfg        = status.cfg.get_attack1()
    var attack_box: AttackBoxCfg = status.cfg.get_attack1_box()
    return _attack(attack, attack_box)


func character_attack2() -> bool:
    var attack: AttackCfg        = status.cfg.get_attack2()
    var attack_box: AttackBoxCfg = status.cfg.get_attack2_box()
    return _attack(attack, attack_box)


func _attack(attack: AttackCfg, attack_box: AttackBoxCfg) -> bool:
    if not attack or not attack_box:
        return false
    var pos: Vector3        = character.pos()
    var attack_dir: Vector2 = status.skill_dir.normalized()
    var offset_xz: Vector2  = attack_dir * attack_box.offset.x
    var offset_y: float     = attack_box.offset.y
    var offset: Vector3     = Vector3(offset_xz.x, offset_y, offset_xz.y)
    var shape: Shape3D      = attack_box.shape
    _debug_draw_attack_box(shape, offset)
    var result: Array[Character] = Util.raycast_character(shape, pos+offset, attack_dir)
    var is_hit: bool           = false
    for target: Character in result:
        if target == null:
            is_hit = true
            continue
        if target.team() == character.team():
            continue
        target.add_attack(character.id(), attack_dir, attack)
        is_hit = true
    if !is_hit and !attack.is_force_pause:
        skill.on_attack_miss()
    return is_hit

func _debug_draw_attack_box(shape: Shape3D, offset: Vector3) -> void:
    if not get_tree().debug_collisions_hint:
        return
    if shape is BoxShape3D:
        var scale: Vector3 = shape.size
        character.cast_particle(ResourceManager.particle_debug_box, false, offset, scale)
    elif shape is CylinderShape3D:
        var scale: Vector3 = Vector3(shape.radius, shape.height, shape.radius)
        character.cast_particle(ResourceManager.particle_debug_cylinder, false, offset, scale)
    return


func add_attack(from: int, dir: Vector2, attack: AttackCfg):
    var hit_info = HitInfo.new()
    hit_info.from = from
    hit_info.to = character.id()
    hit_info.dir = dir
    hit_info.attack = attack
    settle(hit_info)


func settle(hit_info: HitInfo) -> bool:
    var character_from: Character = Global.character_mgr.get_character(hit_info.from) as Character
    var character_to: Character   = Global.character_mgr.get_character(hit_info.to) as Character
    if !character_from or !character_to:
        return false

    var cfg_from: CharacterCfg = character_from.cfg()
    var cfg_to: CharacterCfg   = character_to.cfg()

    var is_stun    = character_to.get_status("is_stun")
    var hp         = character_to.get_status("hp")
    var shield     = character_to.get_status("shield")
    var has_shield = shield > 0

    var attack: AttackCfg = hit_info.attack
    var is_floating: bool = attack.is_floating or not character_to.get_status("is_on_floor")
    var is_hit_down: bool = attack.is_hit_down and not character_to.get_status("is_on_floor")
    var is_rebound: bool  = attack.is_rebound

    var is_break_shield: bool = false
    var is_break_stun: bool   = false
    var is_block: bool        = false
    var is_kill: bool         = false
    var is_break_skill: bool  = false
    var pause_time: float     = attack.pause_time
    var is_remote: bool       = character_from != character_from.get_character_owner()

    #造成伤害
    var damage: float = attack.damage_rate * cfg_from.attack
    if has_shield:
        damage = min(shield, damage)
        character_to.set_status("shield", shield-damage)
        is_break_shield = damage == shield
        if is_break_shield:
            character_to.remove_buff("shield_recover_cd")
            character_to.remove_buff("shield_recover")
            has_shield = false
        else:
            character_to.remove_buff("shield_recover")
            character_to.add_buff("shield_recover_cd", cfg_to.shield.recover_cd)
    else:
        damage = min(hp, damage)
        character_to.set_status("hp", hp-damage)
        is_kill = damage == hp
        if is_kill:
            character_to.add_buff("die", 1)

    #眩晕值累加
    if not is_stun:
        var stun_damage: float = attack.stun_attack
        var stun               = character_to.get_status("stun")
        var stun_max           = character_to.get_status("stun_max")
        stun_damage = min(stun_max-stun, stun_damage)
        character_to.set_status("stun", stun+stun_damage)
        is_break_stun = stun_damage == stun_max-stun
        if is_break_stun:
            is_stun = true
            character_to.set_status("is_stun", true)
            character_to.remove_buff("stun_recover_cd")
            character_to.remove_buff("stun_recover")
            character_to.add_buff("stun_recover_break_cd", cfg_to.stun.recover_break_cd)
        else:
            character_to.remove_buff("stun_recover")
            character_to.add_buff("stun_recover_cd", cfg_to.stun.recover_cd)

    #mp累加
    if not is_remote:
        character_from.add_mp(damage * cfg_from.mp.add_rate_attack)
        character_from.remove_buff("mp_recover")
        character_from.add_buff("mp_recover_cd", status.cfg.mp.recover_cd)
    character_to.add_mp(damage * cfg_to.mp.add_rate_hit)
    character_to.remove_buff("mp_recover")
    character_to.add_buff("mp_recover_cd", status.cfg.mp.recover_cd)

    #硬直等级
    var break_level_def: int = cfg_to.shield.break_level_on if has_shield else cfg_to.shield.break_level_off
    var break_level_sub: int = clampi(attack.break_level - break_level_def, 0, 3)
    is_break_skill = break_level_sub > 0
    if is_break_skill:
        #取消技能
        if character_to.get_status("is_skill_running"):
            character_to.cancel_skill()

        #停止移动
        character_to.move_stop()

        #受击动画
        var trigger_hit: String = ""
        if is_rebound: trigger_hit="rebound"
        elif is_floating: trigger_hit = "air_hit_down" if is_hit_down else "air_hit_up"
        elif is_stun: trigger_hit="stun_hit"
        elif break_level_sub == 3: trigger_hit="lhit"
        elif break_level_sub == 2: trigger_hit="mhit"
        elif break_level_sub == 1: trigger_hit="hit"
        character_to.set_view_trigger(trigger_hit)

        #浮空 击落 强制位移
        var hit_up_speed: float   = attack.hit_up_speed
        var hit_back_speed: float = attack.hit_back_speed
        if is_floating:
            character_to.add_buff("stagger", -1)
            character_to.add_buff("floating", -1)
            if hit_info.dir.x!=0:
                character_to.set_status("is_right", hit_info.dir.x<0)
        else:
            character_to.add_buff("stagger", 1)
            hit_up_speed = 0
            if hit_back_limit_curve:
                var dir: Vector2 = character_from.pos2D() - character_to.pos2D()
                var dist         = clamp(dir.length(), 0, 1)
                hit_back_speed = max(hit_back_limit_curve.sample(dist), hit_back_speed)
        if is_hit_down:
            character_to.add_buff("hit_down", -1)

        character_to.set_hit_move(hit_info.dir, hit_back_speed, hit_up_speed)
        character_to.add_buff("hit_back", attack.hit_back_duration)
        character_to.add_buff("hit_up", attack.hit_up_duration)

    #停止自身位移
    if attack.is_stop_self and not is_remote:
        character_from.move_stop()
        character_from.set_status("skill_move_stop", true)

    #受击特效
    match attack.damage_type:
        Enum.EDamageType.Sharp: character_to.cast_particle(ResourceManager.particle_hit_sharp, false)
        Enum.EDamageType.Blunt: character_to.cast_particle(ResourceManager.particle_hit_blunt, false)
        Enum.EDamageType.Ground: character_to.cast_particle(ResourceManager.particle_hit_ground, false)
        _: pass
    
    #抖动
    character_to.add_buff("shake_x", 0.2, true)

    #闪白
    character_to.add_buff("flash_white", 0.1)

    #卡帧
    if not is_remote:
        character_from.set_pause_time(pause_time)
    character_to.set_pause_time(pause_time)

    #全局特效
    Global.camera_mgr.effect(pause_time)

    #伤害跳字
    character_to.show_hit_damage(damage)

    #状态跳字
    if is_break_shield: character_to.show_hit_text("Break")
    elif is_break_stun: character_to.show_hit_text("Stun")
    elif not is_break_skill: character_to.show_hit_text("Block")

    return true


func add_mp(value: float):
    var mp         = character.get_status("mp")
    var mp_max     = character.get_status("mp_max")
    var mp_sub     = character.get_status("mp_sub")
    var mp_sub_max = character.get_status("mp_sub_max")
    value = min(mp_sub_max-mp_sub, value)
    if value == mp_sub_max-mp_sub:
        var mp_add = min(mp_max-mp, 1)
        if mp_add > 0:
            character.set_status("mp", mp+mp_add)
            character.set_status("mp_sub", 0)
        else:
            character.set_status("mp_sub", mp_sub_max)
            character.remove_buff("mp_recover_cd")
            character.remove_buff("mp_recover")
    else:
        character.set_status("mp_sub", mp_sub+value)


func check_ground():
    skill.on_check_ground(0)


func check_ground1():
    skill.on_check_ground(1)


func check_ground2():
    skill.on_check_ground(2)


func cast_sub_character():
    skill.on_cast_sub_character()


func stop():
    move.stop()