package db

import (
	"dashoo.cn/opms_libary/myerrors"
	"errors"
)

// 新增页面请求参数
type DictEntity struct {
	Id   string `json:"id"`
	Name string `json:"name"`
}

// DictReq 字典返回项的请求参数
// v:"name     @required|length:6,30#请输入用户名称|用户名称长度非法"`
type DictReq struct {
	TableName    string        `json:"table_name" v:"table_name@required#表名称为必填项"`      // 表名称
	DisplayField []string      `json:"display_field" v:"display_field@required#显示字段必填"` // 显示字段
	SortFields   string        `json:"sort_fields"`                                     // 排序字段
	Where        interface{}   `json:"where"`                                           // 条件
	Args         []interface{} `json:"args"`                                            // 参数
}

// Dict 字典项
type Dict struct {
	Label string `json:"label"`
	Val   string `json:"val"`
}

// GetDictList 获取字典项列表（有效的） FileldParams可选，第一个为IdField，第二个为SortField，第三个为EnabledField
func (s *ServiceBase) GetDictList(tableName string, NameField string, FileldParams ...string) ([]DictEntity, error) {
	idField := "Id"
	sortField := "SortCode"
	enabledField := "Enabled"

	if len(FileldParams) > 0 {
		for index, param := range FileldParams {
			if param == "" {
				continue
			}

			if index == 0 {
				idField = param
			} else if index == 1 {
				sortField = param
			} else if index == 2 {
				enabledField = param
			}

		}
	}

	var entity []DictEntity
	err := s.DB.Model(tableName).
		Fields(idField+" as Id", NameField+" as Name").
		Where(enabledField, 1).
		Order(sortField + " ASC").
		Structs(&entity)
	if err != nil {
		return nil, myerrors.NewDbError(err)
	}
	return entity, nil
}

// GetDictListForWhere 根据条件返回字典项 (tableName:表名称, displayField 显示字段， where， args 条件参数)
// 如果 displayField 字段只有一个，默认加 Id是key
func (s *ServiceBase) GetDictListForWhere(req DictReq) ([]Dict, error) {
	if len(req.DisplayField) == 0 {
		return nil, errors.New("显示字段参数不能为空")
	}
	defaultField := "Id"
	model := s.DB.Model(req.TableName)
	if len(req.DisplayField) == 1 {
		model = model.Fields(defaultField+" AS Label", req.DisplayField[0]+" AS Val")
	} else {
		model = model.Fields(req.DisplayField[0]+" AS Label", req.DisplayField[1]+" AS Val")
	}
	// 排序
	if req.SortFields != "" {
		model = model.OrderAsc(req.SortFields)
	}
	dictList := make([]Dict, 0)
	if req.Where != nil {
		if len(req.Args) > 0 {
			model = model.Where(req.Where, req.Args)
		} else {
			model = model.Where(req.Where)
		}
	}
	err := model.Scan(&dictList)
	if err != nil {
		return nil, err
	}
	return dictList, nil
}