package repository

import (
	"fmt"
	"github.com/go-pg/pg/v10"
	"gitlab.fjmaimaimai.com/allied-creation/allied-creation-manufacture/pkg/domain"
	"gitlab.fjmaimaimai.com/allied-creation/allied-creation-manufacture/pkg/infrastructure/pg/models"
	"gitlab.fjmaimaimai.com/allied-creation/allied-creation-manufacture/pkg/infrastructure/pg/transform"

	"github.com/linmadan/egglib-go/persistent/pg/sqlbuilder"
	pgTransaction "github.com/linmadan/egglib-go/transaction/pg"
	"github.com/linmadan/egglib-go/utils/snowflake"
)

type ProductRepository struct {
	transactionContext *pgTransaction.TransactionContext
}

func (repository *ProductRepository) nextIdentify() (int64, error) {
	IdWorker, err := snowflake.NewIdWorker(1)
	if err != nil {
		return 0, err
	}
	id, err := IdWorker.NextId()
	return id, err
}
func (repository *ProductRepository) Save(product *domain.Product) (*domain.Product, error) {
	sqlBuildFields := []string{
		"company_id",
		"org_id",
		"product_id",
		"product_code",
		"product_name",
		"product_category",
		"product_spec",
		"created_at",
		"updated_at",
		"deleted_at",
	}
	insertFieldsSnippet := sqlbuilder.SqlFieldsSnippet(sqlBuildFields)
	insertPlaceHoldersSnippet := sqlbuilder.SqlPlaceHoldersSnippet(sqlBuildFields)
	returningFieldsSnippet := sqlbuilder.SqlFieldsSnippet(sqlBuildFields)
	updateFields := sqlbuilder.RemoveSqlFields(sqlBuildFields, "product_id")
	updateFieldsSnippet := sqlbuilder.SqlUpdateFieldsSnippet(updateFields)
	tx := repository.transactionContext.PgTx
	if product.Identify() == nil {
		productId, err := repository.nextIdentify()
		if err != nil {
			return product, err
		} else {
			product.ProductId = int(productId)
		}
		if _, err := tx.QueryOne(
			pg.Scan(
				&product.CompanyId,
				&product.OrgId,
				&product.ProductId,
				&product.ProductCode,
				&product.ProductName,
				&product.ProductCategory,
				&product.ProductSpec,
				&product.CreatedAt,
				&product.UpdatedAt,
				&product.DeletedAt,
			),
			fmt.Sprintf("INSERT INTO products (%s) VALUES (%s) RETURNING %s", insertFieldsSnippet, insertPlaceHoldersSnippet, returningFieldsSnippet),
			product.CompanyId,
			product.OrgId,
			product.ProductId,
			product.ProductCode,
			product.ProductName,
			product.ProductCategory,
			product.ProductSpec,
			product.CreatedAt,
			product.UpdatedAt,
			product.DeletedAt,
		); err != nil {
			return product, err
		}
	} else {
		if _, err := tx.QueryOne(
			pg.Scan(
				&product.CompanyId,
				&product.OrgId,
				&product.ProductId,
				&product.ProductCode,
				&product.ProductName,
				&product.ProductCategory,
				&product.ProductSpec,
				&product.CreatedAt,
				&product.UpdatedAt,
				&product.DeletedAt,
			),
			fmt.Sprintf("UPDATE products SET %s WHERE product_id=? RETURNING %s", updateFieldsSnippet, returningFieldsSnippet),
			product.CompanyId,
			product.OrgId,
			product.ProductId,
			product.ProductCode,
			product.ProductName,
			product.ProductCategory,
			product.ProductSpec,
			product.CreatedAt,
			product.UpdatedAt,
			product.DeletedAt,
			product.Identify(),
		); err != nil {
			return product, err
		}
	}
	return product, nil
}
func (repository *ProductRepository) Remove(product *domain.Product) (*domain.Product, error) {
	tx := repository.transactionContext.PgTx
	productModel := new(models.Product)
	productModel.ProductId = product.Identify().(int)
	if _, err := tx.Model(productModel).WherePK().Delete(); err != nil {
		return product, err
	}
	return product, nil
}
func (repository *ProductRepository) FindOne(queryOptions map[string]interface{}) (*domain.Product, error) {
	tx := repository.transactionContext.PgTx
	productModel := new(models.Product)
	query := sqlbuilder.BuildQuery(tx.Model(productModel), queryOptions)
	query.SetWhereByQueryOption("product.product_id = ?", "productId")
	if err := query.First(); err != nil {
		if err.Error() == "pg: no rows in result set" {
			return nil, fmt.Errorf("没有此资源")
		} else {
			return nil, err
		}
	}
	if productModel.ProductId == 0 {
		return nil, nil
	} else {
		return transform.TransformToProductDomainModelFromPgModels(productModel)
	}
}
func (repository *ProductRepository) Find(queryOptions map[string]interface{}) (int64, []*domain.Product, error) {
	tx := repository.transactionContext.PgTx
	var productModels []*models.Product
	products := make([]*domain.Product, 0)
	query := sqlbuilder.BuildQuery(tx.Model(&productModels), queryOptions)
	query.SetOffsetAndLimit(20)
	query.SetOrderDirect("product_id", "DESC")
	if count, err := query.SelectAndCount(); err != nil {
		return 0, products, err
	} else {
		for _, productModel := range productModels {
			if product, err := transform.TransformToProductDomainModelFromPgModels(productModel); err != nil {
				return 0, products, err
			} else {
				products = append(products, product)
			}
		}
		return int64(count), products, nil
	}
}
func NewProductRepository(transactionContext *pgTransaction.TransactionContext) (*ProductRepository, error) {
	if transactionContext == nil {
		return nil, fmt.Errorf("transactionContext参数不能为nil")
	} else {
		return &ProductRepository{
			transactionContext: transactionContext,
		}, nil
	}
}