package core

import (
	"fmt"
	"os"
	"strings"
)

func VarsFile(savePath string) error {
	saveFileName := fmt.Sprintf("%s/vars.go", strings.TrimRight(savePath, "/"))
	return os.WriteFile(saveFileName, []byte(`
package model

import (
	"git.diulo.com/mogfee/kit/errors"
	"gorm.io/gorm"
)

var ErrNotFound = errors.BadRequest("DB_NOT_FOUND", "数据不存在")
var ErrIdRequest = errors.BadRequest("DB_ID_REQUIRED", "id不能为空")

func IsErrNotFound(err error) bool {
	return errors.Reason(err) == "DB_NOT_FOUND"
}

func IsErrIdRequest(err error) bool {
	return errors.Reason(err) == "DB_ID_REQUIRED"
}
func findResultWithError[T any](data T, err error) (T, error) {
	switch err {
	case nil:
		return data, nil
	case gorm.ErrRecordNotFound:
		return data, ErrNotFound
	default:
		return data, err
	}
}
func GetPage(page int32, size int32) (offset int, pageSize int) {
	if page <= 1 {
		page = 1
	}
	offset = int((page - 1) * size)
	return offset, int(size)
}

`), os.ModePerm)
}