package repositories

import (
	"fmt"
	"time"
	"xorm.io/xorm"
	"xps/datamodel"
    "xps/viewmodel"
)

type AppRepo struct {
	engine *xorm.Engine
}

func NewAppRepo(engine *xorm.Engine) *AppRepo {
	return &AppRepo{
		engine: engine,
	}
}

func (d *AppRepo) GetPage(m map[string]interface{}) (*viewmodel.PageResult, error) {
	limit     := m["limit"].(int)
	page      := m["page"].(int)

	sqlSelect := ` SELECT A.* ,
                          B.app_cat_title `
	sqlFrom   := ` FROM       app     AS A
                   LEFT  JOIN app_cat AS B ON (A.app_cat_id = B.app_cat_id)`
	sqlWhere  := ` WHERE A.deleted_flag = 0 `
	if keywords, ok:= m["keywords"]; ok {
		sqlWhere += " AND A.app_title like '%" + fmt.Sprintf("%s", keywords) + "%'"
	}

	sqlCount    := ` SELECT COUNT(*) `
	total, err1 := d.engine.SQL(sqlCount + sqlFrom + sqlWhere).Count(new(datamodel.App))
	if err1 != nil {
		return nil, err1
	}

	sqlOrderBy := " ORDER BY A.app_id "
	pageStart  := (page - 1) * limit
	sqlLimit   := fmt.Sprintf(" LIMIT %d OFFSET %d ", limit, pageStart)

	datalist := make([]datamodel.App, 0)
	err2 := d.engine.SQL(sqlSelect + sqlFrom + sqlWhere + sqlOrderBy + sqlLimit).Find(&datalist)
	if err2 != nil {
		return nil, err2
	}

	pageResult := &viewmodel.PageResult{}
	pageResult.Data     = datalist
	pageResult.Total    = total
	pageResult.PageSize = limit
	pageResult.Page     = page
	return pageResult, nil
}

func (d *AppRepo) GetList(m map[string]interface{}) ([]viewmodel.AppInfo, error) {
	sqlSelect := ` SELECT     A.* ,
                              B.app_cat_title `
	sqlFrom   := ` FROM       app   AS A
                   LEFT  JOIN app_cat AS B ON (A.app_cat_id = B.app_cat_id)`
	sqlWhere  := ` WHERE A.deleted_flag = 0 `
	if keywords, ok := m["keywords"]; ok {
		sqlWhere += " AND   A.app_title like '%" + fmt.Sprintf("%s", keywords) + "%'"
	}

	sqlOrderBy := " ORDER BY A.app_id "
	datalist   := make([]viewmodel.AppInfo, 0)
	err := d.engine.SQL(sqlSelect + sqlFrom + sqlWhere + sqlOrderBy).Find(&datalist)
	if err != nil {
		return nil, err
	}
	return datalist, nil
}

func (d *AppRepo) GetById(appId int64) (*viewmodel.AppInfo, error) {
	sqlSelect := ` SELECT     A.* ,
                              B.app_cat_title`
	sqlFrom   := ` FROM       app     AS A
                   LEFT  JOIN app_cat AS B ON (A.app_cat_id = B.app_cat_id)`
	sqlWhere  := ` WHERE A.deleted_flag = 0 AND A.app_id =`+ fmt.Sprintf("%d", appId)
	
	data      := &viewmodel.AppInfo{}
	ok, err   := d.engine.SQL(sqlSelect + sqlFrom + sqlWhere).Limit(1).Get(data)
	if !ok && err == nil {
		return nil, err
	} else {
		return data, nil
	}
}

func (d *AppRepo) Create(data *datamodel.App) error {
	data.CreatedAt = time.Now()
	_, err := d.engine.Insert(data)
	return err
}

func (d *AppRepo) Update(data *datamodel.App) error {
	appId := data.AppId

	data.UpdatedAt = time.Now()
	_, err := d.engine.Where("app_id = ?", appId).Update(data)
	return err
}

func (d *AppRepo) Delete(m map[string]interface{}) error {
	appId     := m["appId"].(int64)
	deletedBy := m["deletedBy"].(int64)

	data := &datamodel.App{}
	data.DeletedFlag = 1
	data.DeletedBy = deletedBy
	data.DeletedAt = time.Now()
	_, err := d.engine.Where("app_id = ?", appId).Update(data)
	return err
}