package repository

import (
	"context"
	"errors"
	"time"

	"code.30cm.net/digimon/app-cloudep-product-service/pkg/domain/entity"
	"code.30cm.net/digimon/app-cloudep-product-service/pkg/domain/repository"
	mgo "code.30cm.net/digimon/library-go/mongo"
	"github.com/zeromicro/go-zero/core/stores/cache"
	"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 KYCRepositoryParam struct {
	Conf      *mgo.Conf
	CacheConf cache.CacheConf
	DBOpts    []mon.Option
	CacheOpts []cache.Option
}

type KYCRepository struct {
	DB mgo.DocumentDBWithCacheUseCase
}

func NewKYCRepository(param KYCRepositoryParam) repository.KYCRepository {
	e := entity.KYC{}
	documentDB, err := mgo.MustDocumentDBWithCache(
		param.Conf,
		e.CollectionName(),
		param.CacheConf,
		param.DBOpts,
		param.CacheOpts,
	)
	if err != nil {
		panic(err)
	}

	return &KYCRepository{
		DB: documentDB,
	}
}

func (repo *KYCRepository) Create(ctx context.Context, data *entity.KYC) error {
	if data.ID.IsZero() {
		now := time.Now().UTC().UnixNano()
		data.ID = primitive.NewObjectID()
		data.CreatedAt = now
		data.UpdatedAt = now
	}

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

	return err
}

func (repo *KYCRepository) FindLatestByUID(ctx context.Context, uid string) (*entity.KYC, error) {
	filter := bson.M{"uid": uid}
	var result entity.KYC
	opts := options.FindOne().SetSort(bson.D{{Key: "created_at", Value: -1}}) // 用 SetSort 加入排序

	err := repo.DB.GetClient().FindOne(ctx, &result, filter, opts)
	if err != nil {
		if errors.Is(err, mongo.ErrNoDocuments) {
			return nil, ErrNotFound
		}

		return nil, err
	}

	return &result, nil
}

func (repo *KYCRepository) FindByID(ctx context.Context, id string) (*entity.KYC, error) {
	oid, err := primitive.ObjectIDFromHex(id)
	if err != nil {
		return nil, err
	}
	filter := bson.M{"_id": oid}
	var result entity.KYC
	err = repo.DB.GetClient().FindOne(ctx, &result, filter)
	if err != nil {
		return nil, err
	}

	return &result, nil
}

func (repo *KYCRepository) List(ctx context.Context, params repository.KYCQueryParams) ([]*entity.KYC, int64, error) {
	filter := bson.M{}
	if params.UID != nil {
		filter["uid"] = *params.UID
	}
	if params.Country != nil {
		filter["country_region"] = *params.Country
	}
	if params.Status != nil {
		filter["status"] = *params.Status
	}

	// 設置排序選項
	opts := options.Find().SetSkip((params.PageIndex - 1) * params.PageSize).SetLimit(params.PageSize)
	//if params.SortByDate {
	//	opts.SetSort(bson.E{Key: "created_at", Value: -1})
	//} else {
	//	opts.SetSort(bson.D{{Key: "updated_at", Value: -1}})
	//}
	// 查詢符合條件的總數
	total, err := repo.DB.GetClient().CountDocuments(ctx, filter)
	if err != nil {
		return nil, 0, err
	}

	// 執行查詢並獲取結果
	var results []*entity.KYC
	err = repo.DB.GetClient().Find(ctx, &results, filter, opts)
	if err != nil {
		return nil, 0, err
	}

	return results, total, nil
}

func (repo *KYCRepository) UpdateStatus(ctx context.Context, id string, status string, reason string) error {
	oid, err := primitive.ObjectIDFromHex(id)
	if err != nil {
		return err
	}
	filter := bson.M{"_id": oid}
	update := bson.M{
		"$set": bson.M{
			"status":        status,
			"reject_reason": reason,
			"updated_at":    time.Now().UTC().UnixNano(),
		},
	}
	_, err = repo.DB.GetClient().UpdateOne(ctx, filter, update)

	return err
}

func (repo *KYCRepository) UpdateKYCInfo(ctx context.Context, id string, update *repository.KYCUpdateParams) error {
	oid, err := primitive.ObjectIDFromHex(id)
	if err != nil {
		return err
	}
	setFields := bson.M{"updated_at": time.Now().UTC().UnixNano()}
	if update.Name != nil {
		setFields["name"] = *update.Name
	}
	if update.Identification != nil {
		setFields["identification"] = *update.Identification
	}
	if update.IdentificationType != nil {
		setFields["identification_type"] = *update.IdentificationType
	}
	if update.Address != nil {
		setFields["address"] = *update.Address
	}
	if update.PostalCode != nil {
		setFields["postal_code"] = *update.PostalCode
	}
	if update.IDFrontImage != nil {
		setFields["id_front_image"] = *update.IDFrontImage
	}
	if update.IDBackImage != nil {
		setFields["id_back_image"] = *update.IDBackImage
	}
	if update.BankStatementImg != nil {
		setFields["bank_statement_img"] = *update.BankStatementImg
	}
	if update.BankCode != nil {
		setFields["bank_code"] = *update.BankCode
	}
	if update.BankName != nil {
		setFields["bank_name"] = *update.BankName
	}
	if update.BranchCode != nil {
		setFields["branch_code"] = *update.BranchCode
	}
	if update.BranchName != nil {
		setFields["branch_name"] = *update.BranchName
	}
	if update.BankAccount != nil {
		setFields["bank_account"] = *update.BankAccount
	}

	filter := bson.M{"_id": oid, "status": "PENDING"} // 僅允許更新尚未審核的
	updateDoc := bson.M{"$set": setFields}
	_, err = repo.DB.GetClient().UpdateOne(ctx, filter, updateDoc)

	return err
}