package app

import (
	"errors"
	"github.com/sirupsen/logrus"
	"gorm.io/gorm"
	"lc-fangdaosha/global"
	"lc-fangdaosha/model/app"
	"lc-fangdaosha/model/app/request"
	"lc-fangdaosha/model/app/response"
)

var ExistError = errors.New("已存在")

type GatewayService struct {
}

func (gs *GatewayService) CreateIfNotExist(isn string) (*app.Gateway, error) {
	var gate *app.Gateway
	err := global.Db.Select("id, isn").Model(&app.Gateway{}).Where("isn = ? AND is_deleted = 0", isn).Scan(&gate).Debug().Error
	if err != nil {
		return nil, err
	}
	if gate != nil {
		return gate, ExistError
	}
	var gateway = &app.Gateway{Isn: isn}
	err = global.Db.Create(gateway).Debug().Error
	if err != nil {
		return nil, err
	}
	logrus.Infof("网关[%s]注册成功", isn)
	return gateway, nil
}

// List 该用户下所有设备数据
func (gs *GatewayService) List(req request.GatewayRequest) (list []response.Gateways, err error) {
	db := global.Db.Select("g.id,g.gateway_name,g.osn,g.description,c.name AS camera_name, RIGHT(c.sn,9) AS camera_sn,c.stream_id,c.stream_url").
		Table("gateway g LEFT JOIN camera c ON g.id = c.gid").
		Where("g.is_deleted = 0")
	//条件查询设备,网关名,网关osn,摄像头sn
	if req.Uid > 0 {
		db.Where("g.uid = ?", req.Uid)
	}
	if req.Osn != "" {
		db.Where("g.osn = ?", req.Osn)
	}
	if req.CameraSn != "" {
		db.Where("c.sn LIKE ?", "%"+req.CameraSn)
	}
	if req.Name != "" {
		db.Where("gateway_name LIKE ?", "%"+req.Name+"%")
	}
	db.Offset(req.PageSize * (req.Page - 1)).Limit(req.PageSize)
	err = db.Debug().Find(&list).Error
	return
}

// AdminSet 用于后台给网关配置osn或分配用户,只有超级管理员才有权限
func (gs *GatewayService) AdminSet(gw *app.Gateway) error {
	var m = make(map[string]any)
	if gw.Uid != 0 {
		m["uid"] = gw.Uid
	}
	if gw.Osn != "" {
		m["osn"] = gw.Osn
	}
	return global.Db.Model(&app.Gateway{}).Where("id = ? AND is_deleted = 0", gw.ID).Updates(m).Debug().Error
}

// Update 由于普通用户配置网关名和描述信息
func (gs *GatewayService) Update(gw *app.Gateway) error {
	var m = make(map[string]any)
	if gw.GatewayName != "" {
		m["gateway_name"] = gw.GatewayName
	}
	if gw.Description != "" {
		m["description"] = gw.Description
	}
	return global.Db.Model(&app.Gateway{}).Where("id = ? AND is_deleted = 0", gw.ID).Updates(m).Debug().Error
}

// DeleteGateways 删除网关及关联设备
func (gs *GatewayService) DeleteGateways(gw app.Gateway) (err error) {
	devs := gs.DevIds(gw.ID)
	err = global.Db.Transaction(func(tx *gorm.DB) error {
		//删除网关
		if err := tx.Debug().Model(&app.Gateway{}).Where("id = ?", gw.ID).Update("is_deleted", 1).Error; err != nil {
			return err
		}
		if err = tx.Debug().Delete(&gw).Error; err != nil {
			return err
		}
		return nil
	})
	//删除摄像头
	cs := CameraService{}
	if devs.Cid != 0 {
		var c app.Camera
		c.ID = devs.Cid
		err = cs.DeleteCamera(c)
		if err != nil {
			logrus.Error("删除摄像头失败", err)
		}
	}
	return err
}

// UnbindGateways 解绑网关下面的设备
func (gs *GatewayService) UnbindGateways(gw app.Gateway) error {
	devs := gs.DevIds(gw.ID)
	var err error
	if devs.Cid != 0 {
		if err1 := global.Db.Model(&app.Camera{}).Where("id = ?", devs.Cid).Update("gid", 0).Error; err1 != nil {
			logrus.WithFields(logrus.Fields{"网关": devs.Osn, "摄像头": devs.Csn}).Error("解绑失败", err)
			err = errors.Join(err1)
		}
	}
	if err == nil {
		logrus.WithFields(logrus.Fields{"网关": devs.Osn, "摄像头": devs.Csn}).Info("解绑成功")
	}
	return err
}

// DevIds 查询网关及关联设备的id
func (gs *GatewayService) DevIds(id uint) (devs app.Devices) {
	global.Db.Select("g.id AS gid,g.osn,c.id AS cid,RIGHT(c.sn,9) AS csn").
		Table("gateway g LEFT JOIN camera c ON g.id = c.gid").
		Where("g.id = ?", id).
		Find(&devs)
	return
}