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

type PermissionRepository struct {
	DB mongo.DocumentDBWithCacheUseCase
}

// NewPermissionRepository 創建權限倉庫實例
func NewPermissionRepository(param PermissionRepositoryParam) repository.PermissionRepository {
	e := entity.Permission{}
	documentDB, err := mongo.MustDocumentDBWithCache(
		param.Conf,
		e.CollectionName(),
		param.CacheConf,
		param.DBOpts,
		param.CacheOpts,
	)
	if err != nil {
		panic(err)
	}

	return &PermissionRepository{
		DB: documentDB,
	}
}

func (repo *PermissionRepository) Create(ctx context.Context, permission *entity.Permission) error {
	now := time.Now()
	permission.CreateTime = now
	permission.UpdateTime = now

	id := bson.NewObjectID()
	permission.ID = id

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

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

	return nil
}

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

	rk := domain.GetPermissionRedisKey(objID.Hex())
	err = repo.DB.FindOne(ctx, rk, &p, bson.M{"_id": objID})
	if err != nil {
		if errors.Is(err, mongodriver.ErrNoDocuments) {
			return nil, errs.ResourceNotFoundWithScope(
				code.CloudEPPermission,
				domain.FailedToGetPermission,
				"failed to get permission by id")
		}

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

	return &p, nil
}

func (repo *PermissionRepository) GetByKey(ctx context.Context, httpMethod, httpPath string) (*entity.Permission, error) {
	filter := bson.M{
		"http_method": httpMethod,
		"http_path":   httpPath,
		"status":      permission.StatusActive,
	}

	var p entity.Permission
	err := repo.DB.GetClient().FindOne(ctx, &p, filter)
	if err != nil {
		if errors.Is(err, mongodriver.ErrNoDocuments) {
			return nil, errs.ResourceNotFoundWithScope(
				code.CloudEPPermission, domain.FailedToGetPermissionByKey,
				"failed to get permission by key")
		}

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

func (repo *PermissionRepository) Update(ctx context.Context, id string, permission *entity.Permission) error {
	permission.UpdateTime = time.Now()
	update := bson.M{
		"$set": bson.M{
			"parent_id":   permission.ParentID,
			"name":        permission.Name,
			"http_method": permission.HTTPMethod,
			"http_path":   permission.HTTPPath,
			"status":      permission.Status,
			"type":        permission.Type,
			"update_time": permission.UpdateTime,
		},
	}

	rk := domain.GetPermissionRedisKey(id)
	objID, err := bson.ObjectIDFromHex(id)
	if err != nil {
		return err
	}

	_, 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 *PermissionRepository) Delete(ctx context.Context, id string) error {
	rk := domain.GetPermissionRedisKey(id)
	objID, err := bson.ObjectIDFromHex(id)
	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 *PermissionRepository) List(ctx context.Context, filter repository.PermissionFilter) ([]*entity.Permission, error) {
	query := bson.M{}

	if filter.Status != nil {
		query["status"] = *filter.Status
	}
	if filter.Type != nil {
		query["type"] = *filter.Type
	}
	if filter.ParentID != nil {
		query["parent_id"] = *filter.ParentID
	}

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

func (repo *PermissionRepository) GetActivePermissions(ctx context.Context) ([]*entity.Permission, error) {
	status := permission.StatusActive
	filter := repository.PermissionFilter{
		Status: &status,
	}

	return repo.List(ctx, filter)
}

// Index20241226001UP 創建索引
func (repo *PermissionRepository) 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{
		"http_method",
		"http_path",
	}, []int32{1, 1}, true)

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

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