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

type RoleRepository struct {
	DB mongo.DocumentDBWithCacheUseCase
}

// NewRoleRepository 創建角色倉庫實例
func NewRoleRepository(param RoleRepositoryParam) repository.RoleRepository {
	e := entity.Role{}
	documentDB, err := mongo.MustDocumentDBWithCache(
		param.Conf,
		e.CollectionName(),
		param.CacheConf,
		param.DBOpts,
		param.CacheOpts,
	)
	if err != nil {
		panic(err)
	}

	return &RoleRepository{
		DB: documentDB,
	}
}

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

	rk := domain.GetRoleRedisKeyRedisKey(id.Hex())
	_, err := repo.DB.InsertOne(ctx, rk, role)
	if err != nil {
		// 檢查是否為重複鍵錯誤
		if mongodriver.IsDuplicateKeyError(err) {
			return errs.ResourceAlreadyExist(role.ClientID)
		}

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

	return nil
}

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

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

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

	return &role, nil
}

func (repo *RoleRepository) GetByUID(ctx context.Context, uid string) (*entity.Role, error) {
	var role entity.Role
	rk := domain.GetRoleRedisKeyRedisKey(uid)
	err := repo.DB.FindOne(ctx, rk, &role, bson.M{"uid": uid, "status": permission.StatusActive})
	if err != nil {
		if errors.Is(err, mongodriver.ErrNoDocuments) {
			return nil, errs.ResourceNotFoundWithScope(
				code.CloudEPPermission,
				domain.FailedToGetByUID,
				"failed to get role by uid")
		}

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

	return &role, nil
}

func (repo *RoleRepository) GetByClientAndName(ctx context.Context, clientID, name string) (*entity.Role, error) {
	filter := bson.M{
		"client_id": clientID,
		"name":      name,
		"status":    permission.StatusActive,
	}

	var role entity.Role
	err := repo.DB.GetClient().FindOne(ctx, &role, filter)
	if err != nil {
		if errors.Is(err, mongodriver.ErrNoDocuments) {
			return nil, errs.ResourceNotFoundWithScope(
				code.CloudEPPermission, domain.FailedToGetByClientAndName, "failed to get by client and name")
		}

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

	return &role, nil
}

func (repo *RoleRepository) Update(ctx context.Context, id string, role *entity.Role) error {
	role.UpdateTime = time.Now()
	objID, err := bson.ObjectIDFromHex(id)
	if err != nil {
		return err
	}

	update := bson.M{
		"$set": bson.M{
			"name":        role.Name,
			"status":      role.Status,
			"permissions": role.Permissions,
			"update_time": role.UpdateTime,
		},
	}

	rk := domain.GetRoleRedisKeyRedisKey(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 *RoleRepository) Delete(ctx context.Context, id string) error {
	rk := domain.GetRoleRedisKeyRedisKey(id)
	objID, err := bson.ObjectIDFromHex(id)
	if err != nil {
		return err
	}

	gc, err := repo.GetByID(ctx, id)
	if err != nil {
		return err
	}

	rk = domain.GetRoleRedisKeyRedisKey(gc.UID)
	err = repo.DB.DelCache(ctx, rk)
	if err != nil {
		return err
	}

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

	return nil
}

func (repo *RoleRepository) List(ctx context.Context, filter repository.RoleFilter) ([]*entity.Role, error) {
	query := bson.M{}

	if filter.ClientID != "" {
		query["client_id"] = filter.ClientID
	}
	if filter.Status != nil {
		query["status"] = *filter.Status
	}

	var roles []*entity.Role
	err := repo.DB.GetClient().Find(ctx, &roles, 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 roles, nil
}

func (repo *RoleRepository) GetRolesByClientID(ctx context.Context, clientID string) ([]*entity.Role, error) {
	status := permission.StatusActive
	filter := repository.RoleFilter{
		ClientID: clientID,
		Status:   &status,
	}

	return repo.List(ctx, filter)
}

// Index20241226001UP 創建索引
func (repo *RoleRepository) 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{
		"client_id",
		"name",
	}, []int32{1, 1}, true)

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

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