package repository

import (
	"backend/pkg/library/errs/code"
	"backend/pkg/permission/domain"
	"backend/pkg/permission/domain/permission"
	"context"
	"errors"
	"go.mongodb.org/mongo-driver/v2/mongo/options"
	"time"

	"backend/pkg/library/errs"
	"backend/pkg/library/mongo"
	"backend/pkg/permission/domain/entity"
	"backend/pkg/permission/domain/repository"

	"github.com/zeromicro/go-zero/core/stores/cache"
	"github.com/zeromicro/go-zero/core/stores/mon"
	"go.mongodb.org/mongo-driver/v2/bson"
	mongodriver "go.mongodb.org/mongo-driver/v2/mongo"
)

type UserRoleRepositoryParam struct {
	Conf      *mongo.Conf
	CacheConf cache.CacheConf
	DBOpts    []mon.Option
	CacheOpts []cache.Option
}

type UserRoleRepository struct {
	DB mongo.DocumentDBWithCacheUseCase
}

// NewUserRoleRepository 創建用戶角色倉庫實例
func NewUserRoleRepository(param UserRoleRepositoryParam) repository.UserRoleRepository {
	e := entity.UserRole{}
	documentDB, err := mongo.MustDocumentDBWithCache(
		param.Conf,
		e.CollectionName(),
		param.CacheConf,
		param.DBOpts,
		param.CacheOpts,
	)
	if err != nil {
		panic(err)
	}

	return &UserRoleRepository{
		DB: documentDB,
	}
}

func (repo *UserRoleRepository) Create(ctx context.Context, userRole *entity.UserRole) error {
	now := time.Now()
	userRole.CreateTime = now
	userRole.UpdateTime = now
	id := bson.NewObjectID()
	userRole.ID = id

	rk := domain.GetUserRoleRedisKey(id.Hex())
	userRole.CreateTime = time.Now()
	userRole.UpdateTime = time.Now()

	_, err := repo.DB.InsertOne(ctx, rk, userRole)
	if err != nil {
		// 檢查是否為重複鍵錯誤
		if mongodriver.IsDuplicateKeyError(err) {
			return errs.ResourceAlreadyExist("failed to insert user role")
		}

		return errs.DBErrorWithScope(code.CloudEPPermission, err.Error())
	}

	return nil
}

func (repo *UserRoleRepository) GetByID(ctx context.Context, id string) (*entity.UserRole, error) {
	var userRole entity.UserRole
	objID, err := bson.ObjectIDFromHex(id)
	if err != nil {
		return nil, err
	}

	rk := domain.GetUserRoleRedisKey(id)
	err = repo.DB.FindOne(ctx, rk, &userRole, bson.M{"_id": objID})
	if err != nil {
		if errors.Is(err, mongodriver.ErrNoDocuments) {
			return nil, errs.ResourceNotFoundWithScope(
				code.CloudEPPermission,
				domain.FailedToGetRoleByID,
				"failed to get user role by id")
		}

		return nil, errs.DBErrorWithScope(code.CloudEPPermission, err.Error())
	}

	return &userRole, nil
}

func (repo *UserRoleRepository) GetByUserAndRole(ctx context.Context, uid, roleUID string) (*entity.UserRole, error) {
	filter := bson.M{
		"uid":      uid,
		"role_uid": roleUID,
		"status":   permission.StatusActive,
	}

	var userRole entity.UserRole
	err := repo.DB.GetClient().Find(ctx, &userRole, filter)
	if err != nil {
		if errors.Is(err, mongodriver.ErrNoDocuments) {
			return nil, errs.ResourceNotFoundWithScope(code.CloudEPPermission, 0, "failed to get user and role")
		}

		return nil, errs.DatabaseErrorWithScope(code.CloudEPPermission, 0, err.Error())
	}

	return &userRole, nil
}

func (repo *UserRoleRepository) Update(ctx context.Context, id string, userRole *entity.UserRole) error {
	userRole.UpdateTime = time.Now()
	objID, err := bson.ObjectIDFromHex(id)
	if err != nil {
		return err
	}
	update := bson.M{
		"$set": bson.M{
			"status":      userRole.Status,
			"update_time": userRole.UpdateTime,
		},
	}

	rk := domain.GetUserRoleRedisKey(id)

	_, err = repo.DB.UpdateOne(ctx, rk, bson.M{"_id": objID}, update)
	if err != nil {
		return errs.DBErrorWithScope(code.CloudEPPermission, err.Error())
	}

	return nil
}

func (repo *UserRoleRepository) Delete(ctx context.Context, id string) error {
	objID, err := bson.ObjectIDFromHex(id)
	if err != nil {
		return err
	}

	rk := domain.GetUserRoleRedisKey(id)
	_, err = repo.DB.DeleteOne(ctx, rk, bson.M{"_id": objID})
	if err != nil {
		return errs.DBErrorWithScope(code.CloudEPPermission, err.Error())
	}

	return nil
}

func (repo *UserRoleRepository) List(ctx context.Context, filter repository.UserRoleFilter) ([]*entity.UserRole, error) {
	query := bson.M{}
	if filter.Brand != "" {
		query["brand"] = filter.Brand
	}
	if filter.UID != "" {
		query["uid"] = filter.UID
	}
	if filter.RoleUID != "" {
		query["role_uid"] = filter.RoleUID
	}
	if filter.Status != nil {
		query["status"] = *filter.Status
	}

	var userRoles []*entity.UserRole
	err := repo.DB.GetClient().Find(ctx, &userRoles, query)
	if err != nil {
		return nil, errs.DBErrorWithScope(code.CloudEPPermission, err.Error())
	}

	err = repo.DB.GetClient().Find(ctx,
		&userRoles, query,
		options.Find().SetLimit(int64(filter.Limit)),
		options.Find().SetSkip(int64(filter.Skip)))
	if err != nil {
		return nil, errs.DBErrorWithScope(code.CloudEPPermission, err.Error())
	}

	return userRoles, nil
}

func (repo *UserRoleRepository) GetUserRolesByUID(ctx context.Context, uid string) ([]*entity.UserRole, error) {
	status := permission.StatusActive
	filter := repository.UserRoleFilter{
		UID:    uid,
		Status: &status,
	}

	return repo.List(ctx, filter)
}

func (repo *UserRoleRepository) DeleteByUserAndRole(ctx context.Context, uid, roleUID string) error {
	filter := repository.UserRoleFilter{
		UID:     uid,
		RoleUID: roleUID,
	}
	list, err := repo.List(ctx, filter)
	if err != nil {
		return err
	}
	if len(list) == 0 {
		return nil
	}

	for _, item := range list {
		_ = repo.DB.DelCache(ctx, domain.GetUserRoleRedisKey(item.ID.Hex()))
	}

	_, err = repo.DB.GetClient().DeleteMany(ctx, filter)
	if err != nil {
		return errs.DBErrorWithScope(code.CloudEPPermission, err.Error())
	}

	return nil
}

// Index20241226001UP 創建索引
func (repo *UserRoleRepository) Index20241226001UP(ctx context.Context) (*mongodriver.Cursor, error) {
	// 等價於 db.account.createIndex({ "login_id": 1, "platform": 1}, {unique: true})
	repo.DB.PopulateMultiIndex(ctx, []string{
		"uid",
		"role_uid",
	}, []int32{1, 1}, true)

	// 等價於 db.account.createIndex({"create_at": 1})
	repo.DB.PopulateIndex(ctx, "uid", 1, false)
	repo.DB.PopulateIndex(ctx, "status", 1, false)

	return repo.DB.GetClient().Indexes().List(ctx)
}