extends AnimatedSprite3D
class_name View

@onready var status: Status = (%Status as Status)


class Trans:
    var condition: StringName
    var compareType: String
    var conditionValue
    var from: StringName
    var to: StringName
    var trigger_name: StringName
    var on_end: bool

var trans_list: Array[Trans] = []
var move_sprite_frames: SpriteFrames


func _ready():
    # 地面行走
    trans("idle_loop", "run1", "speed_xz", ">", 1)
    run("run1", "run2_loop")
    trans("run1", "run3", "speed_xz", "<", 1)
    trans("run2_loop", "run3", "speed_xz", "<", 1)
    run("run3", "idle_loop")
    trans("run3", "run1", "speed_xz", ">", 1)

    # 跳跃
    trigger("any", "jump1", "trigger_jump")
    run("jump1", "jump2_loop")
    trans("jump2_loop", "jump3", "speed_y", "<=", 0)
    run("jump3", "jump4_loop")
    trans("jump4_loop", "jump5", "is_on_floor", "=", true)
    run("jump5", "idle_loop")
    trans("jump5", "run1", "speed_xz", ">", 1)

    #地面受击
    trigger("any", "hit1", "trigger_hit")
    trigger("any", "mhit1", "trigger_mhit")
    trigger("any", "lhit1", "trigger_lhit")
    run("hit1", "hit2_loop")
    run("mhit1", "mhit2_loop")
    run("lhit1", "lhit2_loop")
    trans("hit2_loop", "hit3", "is_stagger", "=", false)
    trans("mhit2_loop", "mhit3", "is_stagger", "=", false)
    trans("lhit2_loop", "lhit3", "is_stagger", "=", false)
    run("hit3", "idle_loop")
    run("mhit3", "idle_loop")
    run("lhit3", "idle_loop")

    #空中受击
    trigger("any", "airhit1", "trigger_air_hit_up")
    trigger("any", "airhit4_loop", "trigger_air_hit_down")
    run("airhit1", "airhit2_loop")
    trans("airhit2_loop", "airhit3", "speed_y", "<=", 0)
    run("airhit3", "airhit4_loop")
    trans("airhit4_loop", "airhit5", "is_on_floor", "=", true)
    run("airhit5", "ground1_loop")
    trans("ground1_loop", "ground2", "is_stagger", "=", false)
    run("ground2", "idle_loop")

    #眩晕受击
    trigger_with_condition("any", "stunhit", "trigger_stun_hit", "is_on_floor", "=", true)
    run("stunhit", "ground_stun1_loop")
    trans("ground_stun1_loop", "ground_stun2", "is_stun", "=", false)
    run("ground_stun2", "idle_loop")

    #空中眩晕受击
    trans("airhit5", "airhit5_stun", "is_stun", "=", true)
    run("airhit5_stun", "ground_stun1_loop")

    #落地反弹
    trigger("any", "rebound", "trigger_rebound")
    run("rebound", "airhit2_loop")


func _process(delta) -> void:
    update_flip()
    if not sprite_frames: return
    if status.is_be_throw: return
    if not status.is_skill_running and status.is_pause == is_playing():
        if status.is_pause: pause()
        else: play_animation(animation)
    update_view()
    if status.is_pause: return
    update_trans(false)
    update_material()
    return


func init(default: SpriteFrames):
    sprite_frames = default
    move_sprite_frames = default
    play_animation("idle_loop")


func reset():
    sprite_frames = move_sprite_frames
    if status.is_on_floor:
        play_animation("idle_loop")
    else:
        play_animation("jump4_loop")


func run(from: StringName, to: StringName):
    _add_trans(from, to, "", "", "", "", true)


func run_with_condition(from: StringName, to: StringName, condition, compareType, conditionValue):
    _add_trans(from, to, condition, compareType, conditionValue, "", true)


func trans(from: StringName, to: StringName, condition, compareType, conditionValue):
    _add_trans(from, to, condition, compareType, conditionValue, "", false)


func trigger(from: StringName, to: StringName, trigger_name: StringName):
    _add_trans(from, to, "", "", "", trigger_name, false)


func trigger_with_condition(from: StringName, to: StringName, trigger_name: StringName, condition, compareType, conditionValue):
    _add_trans(from, to, condition, compareType, conditionValue, trigger_name, false)


func _add_trans(from: StringName, to: StringName, condition, compareType, conditionValue, trigger_name: StringName, on_end: bool):
    var new_trans = Trans.new()
    new_trans.condition = condition
    new_trans.compareType = compareType
    new_trans.conditionValue = conditionValue
    new_trans.from = from
    new_trans.to = to
    new_trans.trigger_name = trigger_name
    new_trans.on_end = on_end
    trans_list.append(new_trans)


func update_trans(on_end: bool):
    for trans in trans_list:
        if on_end != trans.on_end:
            continue
        if not ((trans.from == "any") or (trans.from == animation)):
            continue
        if trans.condition != "":
            var conditionValue = status.get(trans.condition)
            match trans.compareType:
                ">": if conditionValue <= trans.conditionValue: continue
                "<": if conditionValue >= trans.conditionValue: continue
                ">=": if conditionValue < trans.conditionValue: continue
                "<=": if conditionValue > trans.conditionValue: continue
                "=": if conditionValue != trans.conditionValue: continue
        if trans.trigger_name != "":
            if status.get(trans.trigger_name):
                status.set(trans.trigger_name, false)
            else: continue
        play_animation(trans.to)


func update_flip():
    scale.x = 1 if status.is_right else -1


func update_view():
    position = status.basic_offset + status.shake_offset
#    global_position = Util.snap_vector3(global_position)


func _on_animation_finished():
    update_trans(true)


func update_material() -> void:
    call_deferred("_update_material")
    return


func _update_material():
    if not sprite_frames:
        return
    var material: ShaderMaterial  = material_override as ShaderMaterial
    var material2: ShaderMaterial = material_override.next_pass as ShaderMaterial
    var tex: Texture2D            = sprite_frames.get_frame_texture(animation, frame)
    var deformation_rate: float   = status.deformation_rate * (0.5 if status.is_floating else 0.4)
    material2.set_shader_parameter("flash_white", status.flash_white_rate)
    material.set_shader_parameter("deformation_dir", status.deformation_dir)
    material2.set_shader_parameter("deformation_dir", status.deformation_dir)
    material.set_shader_parameter("deformation_rate", deformation_rate)
    material2.set_shader_parameter("deformation_rate", deformation_rate)
    material.set_shader_parameter("tex", tex)
    material2.set_shader_parameter("tex", tex)


func play_animation(animation_name: String) -> void:
    if not sprite_frames:
        return
    if not sprite_frames.has_animation(animation_name):
        print("无效动画:", animation_name)
        return
    if animation_name == animation:
        frame = 0
        frame_progress = 0
        play()
    else:
        play(animation_name, Setting.animation_speed_scale)