package repository

import (
	"context"
	"fmt"
	"time"

	"code.30cm.net/digimon/app-cloudep-permission-server/pkg/domain/entity"
	"code.30cm.net/digimon/app-cloudep-permission-server/pkg/domain/repository"
	mgo "code.30cm.net/digimon/library-go/mongo"
	"github.com/zeromicro/go-zero/core/stores/mon"
	"go.mongodb.org/mongo-driver/bson"
	"go.mongodb.org/mongo-driver/bson/primitive"
	"go.mongodb.org/mongo-driver/mongo"
	"go.mongodb.org/mongo-driver/mongo/options"
)

type RoleRepositoryParam struct {
	Conf   *mgo.Conf
	DBOpts []mon.Option
}

type RoleRepository struct {
	DB mgo.DocumentDBUseCase
}

func NewRoleRepository(param RoleRepositoryParam) repository.RoleRepository {
	e := entity.Role{}
	db, err := mgo.NewDocumentDB(param.Conf, e.Collection(), param.DBOpts...)
	if err != nil {
		panic(err)
	}

	return &RoleRepository{
		DB: db,
	}
}

func (repo *RoleRepository) List(ctx context.Context, params repository.ListQuery) ([]*entity.Role, int64, error) {
	// 構建查詢條件
	filter := bson.M{}

	if params.Name != nil {
		filter["name"] = *params.Name
	}

	if params.ClientID != nil {
		filter["client_id"] = *params.ClientID
	}

	if params.Status != nil {
		filter["status"] = *params.Status
	}

	if params.UID != nil {
		filter["uid"] = *params.UID
	}

	// 計算符合條件的總數
	count, err := repo.DB.GetClient().CountDocuments(ctx, filter)
	if err != nil {
		return nil, 0, err
	}

	// 構建查詢選項（分頁）
	opts := options.Find().
		SetSkip(params.PageSize * (params.PageIndex - 1)).
		SetLimit(params.PageSize)

	// 執行查詢
	var result = make([]*entity.Role, 0, params.PageSize)
	err = repo.DB.GetClient().Find(ctx, &result, filter, opts)
	if err != nil {
		return nil, 0, err
	}

	return result, count, nil
}

func (repo *RoleRepository) GetByID(ctx context.Context, id string) (*entity.Role, error) {
	oid, err := primitive.ObjectIDFromHex(id)
	if err != nil {
		return nil, ErrInvalidObjectID
	}

	var result entity.Role
	err = repo.DB.GetClient().FindOne(ctx, &result, bson.M{"_id": oid})
	if err != nil {
		return nil, err
	}

	return &result, nil
}

func (repo *RoleRepository) GetByUID(ctx context.Context, uid string) (*entity.Role, error) {
	var result entity.Role
	err := repo.DB.GetClient().FindOne(ctx, &result, bson.M{"uid": uid})
	if err != nil {
		return nil, err
	}

	return &result, nil
}

func (repo *RoleRepository) All(ctx context.Context, clientID *string) ([]*entity.Role, error) {
	opt := options.Find().SetSort(bson.M{"_id": 1})
	filter := bson.M{}
	if clientID != nil {
		filter["client_id"] = *clientID
	}

	result := make([]*entity.Role, 0)
	err := repo.DB.GetClient().Find(ctx, &result, filter, opt)
	if err != nil {
		return nil, err
	}

	return result, nil
}

// Create 建立新的 Role
func (repo *RoleRepository) Create(ctx context.Context, role *entity.Role) error {
	if role == nil {
		return fmt.Errorf("failed to get role")
	}

	if role.ID.IsZero() {
		now := time.Now().UTC().UnixNano()
		role.ID = primitive.NewObjectID()
		role.CreateAt = now
		role.UpdateAt = now
	}

	_, err := repo.DB.GetClient().InsertOne(ctx, role)

	return err
}

func (repo *RoleRepository) Update(ctx context.Context, role repository.UpdateReq) error {
	now := time.Now().UTC().UnixNano()
	// 動態構建更新內容
	updateFields := bson.M{
		"update_at": now, // 確保 `updateAt` 總是更新
	}

	if role.Name != nil {
		updateFields["name"] = *role.Name
	}

	if role.Status != nil {
		updateFields["status"] = *role.Status
	}

	if role.UID != nil {
		updateFields["uid"] = *role.UID
	}

	if role.ClientID != nil {
		updateFields["client_id"] = *role.ClientID
	}

	oid, err := primitive.ObjectIDFromHex(role.ID)
	if err != nil {
		return ErrInvalidObjectID
	}

	_, err = repo.DB.GetClient().UpdateOne(ctx, bson.M{"_id": oid}, bson.M{"$set": updateFields})
	if err != nil {
		return err
	}

	return nil
}

func (repo *RoleRepository) Delete(ctx context.Context, id string) error {
	oid, err := primitive.ObjectIDFromHex(id)
	if err != nil {
		return ErrInvalidObjectID
	}

	_, err = repo.DB.GetClient().DeleteOne(ctx, bson.M{"_id": oid})
	if err != nil {
		return err
	}

	return nil
}

func (repo *RoleRepository) Index20250224UP(ctx context.Context) (*mongo.Cursor, error) {
	repo.DB.PopulateMultiIndex(ctx, []string{
		"name",
		"client_id",
		"status",
		"uid",
	}, []int32{1, 1, 1, 1}, false)

	repo.DB.PopulateIndex(ctx, "uid", 1, false)

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