@tool
extends Node3D

func get_resource_name(resource: Resource) -> String: return resource.resource_path.get_file().trim_suffix('.tres') #todo 性能


func snap_vector3(value: Vector3) -> Vector3: return Vector3(snap_float(value.x), snap_float(value.y), snap_float(value.z))


func snap_float(value: float) -> float: return floor(value/Setting.pixel_size) * Setting.pixel_size


func dir_angle(dir: Vector2) -> float:
    dir.x = abs(dir.x)
    return dir.angle_to(Vector2.RIGHT)


func angle_dir(angle: float) -> Vector2:
    return Vector2.RIGHT.rotated(angle)


func vector_reduce(vector: Vector2, reduce: float) -> Vector2:
    var length: float = vector.length()
    if length == 0:
        return vector
    var new_len    = max(length - reduce, 0)
    var scale_rate = new_len / length
    return vector * scale_rate


func get_level_grid_pos(pos: Vector3) -> Vector3i:
    var grid_size: float = Setting.pixel_size* Setting.grid_pixel_size
    var ret: Vector3i    = Vector3i(get_div_scale(pos.x, grid_size), get_div_scale(pos.y, grid_size), get_div_scale(pos.z, grid_size))
    return ret


func get_level_float_pos(pos: Vector3i) -> Vector3:
    var grid_size: float = Setting.pixel_size* Setting.grid_pixel_size
    return Vector3(pos.x*grid_size, pos.y*grid_size, pos.z*grid_size)


func get_level_id(pos: Vector3) -> Vector3i:
    var ret: Vector3i = Vector3i(get_div_scale(pos.x, Setting.size_basic.x), get_div_scale(pos.y, Setting.size_basic.y), get_div_scale(pos.z, Setting.size_basic.z))
    return ret


func get_div_scale(a: float, b: float) -> int:
    #解决浮点数精度问题
    var div: float        = a / b
    var is_positive: bool = div > 0
    var decimal: float    = abs(div - int(div))
    if is_positive and decimal > 0.999:
        div += 0.001
    if not is_positive and decimal < 0.001:
        div += 0.001
    return floor(div)


func raycast_character(shape: Shape3D, origin: Vector3, dir: Vector2) -> Array[Character]:
    var space_state: PhysicsDirectSpaceState3D = get_world_3d().direct_space_state
    var query: PhysicsShapeQueryParameters3D   = PhysicsShapeQueryParameters3D.new()
    var angle: float                           = dir_angle(dir)
    query.shape = shape
    query.transform.origin = origin
    query.transform.basis = query.transform.basis.rotated(Vector3.UP, angle)
    var result: Array[Dictionary]              = space_state.intersect_shape(query)
    var result2: Array                         = result.map(func(v): return v["collider"]).filter(func(v): return v is Character)
    var result3: Array[Character]
    for node in result2:
        result3.append(node as Character)
    if result.size() > result3.size():
        result3.append(null) #特殊处理 表示命中非Character物体 例如墙体或地面
    return result3


func clean_animation_lib():
    #删除技能配置中没有的animation文件
    #todo 非阻断 有空再说
    pass


func refresh_animation_lib():
    #刷新animation库 使其与animation文件同步
    var animation_library_path: String = "res://resource/skill_animation_library/animation_library.tres"
    var animation_library              = load(animation_library_path)

    var dir_path: String = "res://resource/skill_animation"
    var dir: DirAccess   = DirAccess.open(dir_path)
    for file in dir.get_files():
        var path: String = dir_path + "/" + file
        var res          = load(path)
        if res is Animation:
            var animation: Animation   = res as Animation
            var animation_name: String = Util.get_resource_name(animation)
            print("refresh_animation_lib: ", animation_name)
            animation_library.add_animation(animation_name, animation)
            animation_library.animation_added.emit(animation_name)

    ResourceSaver.save(animation_library, animation_library_path)


func refresh_mesh_library(path_list: Array, from_editor_tool: bool = false):
    print("refresh_mesh_library")
    var default_shape_normal_full: Array[Variant]   = [load("res://resource/mesh_library/default_shape_normal_full.tres") as Shape3D, Transform3D.IDENTITY]
    var default_shape_normal_half: Array[Variant]   = [load("res://resource/mesh_library/default_shape_normal_half.tres") as Shape3D, Transform3D.IDENTITY]
    var default_shape_normal_stair1: Array[Variant] = [load("res://resource/mesh_library/default_shape_normal_stair1.tres") as Shape3D, Transform3D.IDENTITY]
    var default_shape_normal_stair2: Array[Variant] = [load("res://resource/mesh_library/default_shape_normal_stair2.tres") as Shape3D, Transform3D.IDENTITY]
    var default_shape_large_full: Array[Variant]    = [load("res://resource/mesh_library/default_shape_large_full.tres") as Shape3D, Transform3D.IDENTITY]
    var default_shape_large_half: Array[Variant]    = [load("res://resource/mesh_library/default_shape_large_half.tres") as Shape3D, Transform3D.IDENTITY]
    var default_shape_large_stair1: Array[Variant]  = [load("res://resource/mesh_library/default_shape_large_stair1.tres") as Shape3D, Transform3D.IDENTITY]
    var default_shape_large_stair2: Array[Variant]  = [load("res://resource/mesh_library/default_shape_large_stair2.tres") as Shape3D, Transform3D.IDENTITY]
    var mesh_library_level: MeshLibrary             = load("res://resource/mesh_library/mesh_library_level.tres") as MeshLibrary
    var mesh_library_ground: MeshLibrary            = load("res://resource/mesh_library/mesh_library_ground.tres") as MeshLibrary
    var mesh_library_character: MeshLibrary         = load("res://resource/mesh_library/mesh_library_character.tres") as MeshLibrary
    var material_block_normal: Material             = load("res://render/material/grid_block.tres") as Material
    var material_block_link: Material               = load("res://render/material/grid_block_link.tres") as Material
    var mesh_library_level_id_list: Array[int]      = []
    var mesh_library_ground_id_list: Array[int]     = []

    var reimport_files: Array[String] = []
    for file_name_full in path_list:
        var mesh_name = file_name_full.get_file().split('-')[0].trim_suffix('.vox')
        print(mesh_name)
        if mesh_name.begins_with("m_"):
            continue
        var is_ground = mesh_name.begins_with("g_")
        if is_ground:
            mesh_name = mesh_name.trim_prefix("g_")
        var is_character: bool               = mesh_name.begins_with("c_") or mesh_name.begins_with("a_")
        var mesh: Mesh                       = load(file_name_full) as Mesh
        var mesh_library: MeshLibrary        = mesh_library_ground if is_ground else (mesh_library_character if is_character else mesh_library_level)
        var mesh_library_id_list: Array[int] = mesh_library_ground_id_list if is_ground else mesh_library_level_id_list
        var mesh_id: int                     = mesh_library.find_item_by_name(mesh_name)
        if mesh_id == -1:
            mesh_id = mesh_library.get_last_unused_item_id()
            mesh_library.create_item(mesh_id)
        mesh_library_id_list.append(mesh_id)
        mesh_library.set_item_name(mesh_id, mesh_name)
        mesh_library.set_item_mesh(mesh_id, mesh)
        var material: Material     = mesh.surface_get_material(0) as Material
        var material_set: Material = material_block_link if mesh_name.ends_with("_link") else material_block_normal
        if (mesh.get_surface_count() >0) and ((not material) or (material.get_path() != material_set.get_path())):
            if from_editor_tool:
                reimport_files.append(file_name_full)
            else:
                mesh.surface_set_material(0, material_block_link if mesh_name.ends_with("_link") else material_block_normal)
                ResourceSaver.save(mesh, file_name_full)

        var name_prefix = mesh_name.split("_")[0] if mesh_name.contains("_") else mesh_name
        var item_shapes: Array
        match name_prefix:
            "f": item_shapes = default_shape_normal_full if not is_ground else default_shape_large_full
            "h": item_shapes = default_shape_normal_half if not is_ground else default_shape_large_half
            "s1": item_shapes = default_shape_normal_stair1 if not is_ground else default_shape_large_stair1
            "s2": item_shapes = default_shape_normal_stair2 if not is_ground else default_shape_large_stair2
            "c", "a", "n": pass
            _: item_shapes = [mesh.create_convex_shape(), Transform3D.IDENTITY]
        if item_shapes:
            mesh_library.set_item_shapes(mesh_id, item_shapes)
    _save_mesh_library(mesh_library_level, mesh_library_level_id_list, from_editor_tool)
    _save_mesh_library(mesh_library_ground, mesh_library_ground_id_list, from_editor_tool)

    if from_editor_tool and reimport_files:
        EditorInterface.get_resource_filesystem().reimport_files(reimport_files)


func _save_mesh_library(mesh_library: MeshLibrary, id_list: Array, from_editor_tool: bool):
    if from_editor_tool:
        var ids: PackedInt32Array = mesh_library.get_item_list()
        for id in ids:
            if not id in id_list:
                mesh_library.remove_item(id)

    var meshes: Array[Variant] = []
    for id in id_list:
        meshes.append(mesh_library.get_item_mesh(id))
    var previews: Array[Texture2D] = EditorInterface.make_mesh_previews(meshes, 64)
    for i in range(len(id_list)):
        mesh_library.set_item_preview(id_list[i], previews[i])
    ResourceSaver.save(mesh_library)


func refresh_all_animation_by_sprite_frames(sprite_frames: SpriteFrames):
    var dir_path: String           = "res://resource/skill_animation"
    var dir: DirAccess             = DirAccess.open(dir_path)
    var sprite_frames_name: String = sprite_frames.resource_path.get_file().split('-')[0]
    for file in dir.get_files():
        var path: String = dir_path + "/" + file
        var res          = load(path)
        if not res is Animation:
            continue
        var animation: Animation     = res as Animation
        var sprite_frames_track: int = animation.find_track(NodePath("View:sprite_frames"), Animation.TYPE_VALUE)
        if sprite_frames_track < 0:
            continue
        var sprite_frames_track_key_count: int = animation.track_get_key_count(sprite_frames_track)
        if sprite_frames_track_key_count == 0:
            continue
        var sprite_frames_value: SpriteFrames = animation.track_get_key_value(sprite_frames_track, 0) as SpriteFrames
        var target_sprite_frames_name: String = sprite_frames_value.resource_path.get_file().split('-')[0]
        if sprite_frames_name != target_sprite_frames_name:
            continue
        var animation_track: int = animation.find_track(NodePath("View:animation"), Animation.TYPE_VALUE)
        if animation_track < 0:
            continue
        var animation_track_key_count: int = animation.track_get_key_count(animation_track)
        if animation_track_key_count == 0:
            continue
        var animation_value: String = animation.track_get_key_value(animation_track, 0) as String
        refresh_animation_by_sprite_frames(path, sprite_frames, animation_value, animation)
    Util.refresh_animation_lib()


func refresh_animation_by_sprite_frames(animation_path: String, sprite_frames: SpriteFrames, animation_name: String, animation: Animation) -> void:
    if not sprite_frames.has_animation(animation_name):
        print("动画不存在: ", animation_name)
        return
    var track_sprite_frames: int = animation.find_track(NodePath("View:sprite_frames"), Animation.TYPE_VALUE)
    if track_sprite_frames < 0:
        track_sprite_frames = animation.add_track(Animation.TYPE_VALUE)
        animation.track_set_path(track_sprite_frames, "View:sprite_frames")
        animation.track_insert_key(track_sprite_frames, 0, sprite_frames)

    var track_animation: int = animation.find_track(NodePath("View:animation"), Animation.TYPE_VALUE)
    if track_animation < 0:
        track_animation = animation.add_track(Animation.TYPE_VALUE)
        animation.track_set_path(track_animation, "View:animation")
        animation.track_insert_key(track_animation, 0, animation_name)

    var track_frame: int = animation.find_track(NodePath("View:frame"), Animation.TYPE_VALUE)
    if track_frame >= 0:
        animation.remove_track(track_frame)
    track_frame = animation.add_track(Animation.TYPE_VALUE)
    animation.track_set_path(track_frame, "View:frame")
    var animation_speed: float     = Setting.animation_frame_rate
    var animation_frame_count: int = sprite_frames.get_frame_count(animation_name)
    animation.length = animation_speed*animation_frame_count
    for i in range(0, animation_frame_count):
        var time = i * animation_speed
        animation.track_insert_key(track_frame, time, i)
    animation.value_track_set_update_mode(track_sprite_frames, Animation.UPDATE_DISCRETE)
    animation.value_track_set_update_mode(track_animation, Animation.UPDATE_DISCRETE)
    animation.value_track_set_update_mode(track_frame, Animation.UPDATE_DISCRETE)
    print("refresh_animation: ", animation_name, "(", animation_frame_count, " frames)")
    ResourceSaver.save(animation, animation_path)


func get_all_skill_player_weapon() -> Array[SkillWeaponCfg]:
    var ret: Array[SkillWeaponCfg] = []
    var dir_path: String           = "res://config/skill_player_weapon"
    var dir: DirAccess             = DirAccess.open(dir_path)
    for file in dir.get_files():
        var path: String = dir_path + "/" + file
        var res          = load(path)
        if res is SkillWeaponCfg:
            ret.append(res)
    return ret


func get_all_skill_player_basic() -> Array[SkillWeaponCfg]:
    var ret: Array[SkillWeaponCfg] = []
    var dir_path: String           = "res://config/skill_player_basic"
    var dir: DirAccess             = DirAccess.open(dir_path)
    for file in dir.get_files():
        var path: String = dir_path + "/" + file
        var res          = load(path)
        if res is SkillWeaponCfg:
            ret.append(res)
    return ret


func get_skill_player_weapon_by_weapon(weapon: WeaponCfg) -> Array[SkillWeaponCfg]:
    var ret: Array[SkillWeaponCfg] = []
    var dir_path: String           = "res://config/skill_player_weapon"
    var dir: DirAccess             = DirAccess.open(dir_path)
    for file in dir.get_files():
        var path: String = dir_path + "/" + file
        var res          = load(path)
        if res is SkillWeaponCfg:
            if res.weapon == weapon:
                ret.append(res)
    return ret


func get_character_cfg_by_name(name: String) -> CharacterCfg:
    var path_default: String = "res://config/character/%s.tres" % name
    if ResourceLoader.exists(path_default):
        var res = load(path_default)
        if res is CharacterCfg:
            return res
    return null

func get_level_active_scene_by_name(name: String) -> PackedScene:
    var path_default: String = "res://scene/level_active/%s.tscn" % name
    if ResourceLoader.exists(path_default):
        var res = load(path_default)
        return res
    return null