package app

import (
	"encoding/json"
	"fmt"
	"net/http"
	"reflect"
	"server/db"
	"server/modules/customer/bdb"
	"server/modules/customer/values"
	"server/util"
	"time"

	"github.com/gin-gonic/gin"
	"github.com/liangdas/mqant/log"
	"gorm.io/gorm"
)

type Gin struct {
	C *gin.Context
	R
	User *values.User
}

type R struct {
	Data interface{} `json:"data"`
	Msg  string      `json:"msg"`
	Code int         `json:"code"`
}

func NewApp(c *gin.Context) *Gin {
	g := &Gin{C: c, R: R{Code: values.CodeOK, Msg: "ok"}}
	user, ex := c.Get("user")
	if ex {
		g.User = user.(*values.User)
		if len(g.User.Channels) > 0 {
			json.Unmarshal([]byte(g.User.Channels), &g.User.SChannels)
		}
	}
	return g
}

// Response setting gin.JSON
func (g *Gin) Response() {
	if g.Code == values.CodeRetry {
		g.Msg = "内部错误"
	} else if g.Code == values.CodePower {
		g.Msg = "您无权操作此项"
	}
	g.C.JSON(http.StatusOK, g.R)
}

func (g *Gin) RecordEdit(t int, detail string) {
	u, _ := g.C.Get("user")
	user := u.(*values.User)
	one := &values.EditHistory{Model: t, Detail: detail, Time: time.Now().Unix(), Operator: user.Name, UID: int(user.ID)}
	bdb.BackDB.Create(one)
}

func (g *Gin) S(one interface{}) (pass bool) {
	err := g.C.ShouldBind(one)
	if err != nil {
		g.R.Code = values.CodeParam
		g.R.Msg = err.Error()
		log.Error("bind %v err:%v", reflect.TypeOf(one), err)
		return
	}
	pass = true
	return
}

// U 统一json解析方法
func (g *Gin) U(src []byte, tar interface{}) (pass bool) {
	err := json.Unmarshal(src, tar)
	if err != nil {
		log.Error("%v err:%v", reflect.TypeOf(tar), err)
		g.R.Code = values.CodeRetry
		g.R.Msg = err.Error()
		return
	}
	pass = true
	return
}

// MCommit 提交事务
func (g *Gin) MCommit(tx *gorm.DB) {
	if g.Code == values.CodeOK {
		if err := tx.Commit().Error; err != nil {
			tx.Rollback()
			return
		}
	} else {
		tx.Rollback()
		return
	}
}

// CheckPower 检查权限是否合法
func (g *Gin) CheckPower(power string) bool {
	newMap := map[int][]int{}
	if err := json.Unmarshal([]byte(power), &newMap); err != nil {
		log.Error("err:%v", err)
		g.Code = values.CodeParam
		g.Msg = err.Error()
		return false
	}
	for i := range newMap {
		if !values.IsValidPower(i) {
			log.Error("invalid power:%v", i)
			g.Code = values.CodeParam
			g.Msg = fmt.Sprintf("未知权限参数%v", i)
			return false
		}
	}
	return true
}

// 从数据库中读取数据
func (g *Gin) MGetSqlAll(model, tar interface{}, condition map[string]interface{}) (pass bool) {
	sql := ""
	mod := reflect.TypeOf(model).Elem()
	for k, v := range condition {
		tmp, ok := mod.FieldByName(k)
		if !ok {
			log.Error("invalid model:%v,condition:%v", model, condition)
			continue
		}
		tag := tmp.Tag.Get("web")
		if tag == "" || tag == "-" {
			log.Error("invalid model:%v,condition:%v", model, condition)
			continue
		}
		reft := reflect.TypeOf(v)
		ref := reflect.ValueOf(v)
		if reft.Kind() == reflect.Slice {
			if ref.Len() != 2 {
				log.Error("invalid model:%v,condition:%v", model, condition)
				continue
			}
			if len(sql) > 0 {
				sql += " and "
			}
			sql += fmt.Sprintf("%s >= %v and %s <= %v", tag, ref.Index(0).Interface(), tag, ref.Index(1).Interface())
		} else {
			if len(sql) > 0 {
				sql += " and "
			}
			sql += fmt.Sprintf("%s = %v", tag, ref.Interface())
		}
	}
	if _, err := db.Mysql().QueryAll(sql, "", model, tar); err != nil {
		log.Error("err:%v", err)
		g.Code = values.CodeRetry
		g.R.Msg = err.Error()
		return
	}
	pass = true
	return
}

func (g *Gin) MUpdateAll(updates []map[string]interface{}, element interface{}) (pass bool) {
	for _, v := range updates {
		tmp := reflect.New(reflect.TypeOf(element).Elem()).Interface()
		// log.Debug("%v", v)
		tmpbyte, _ := json.Marshal(v)
		err := json.Unmarshal(tmpbyte, &tmp)
		if err != nil {
			log.Error("err%v", err)
			return
		}
		ref := reflect.ValueOf(tmp).Elem()
		reft := reflect.TypeOf(tmp).Elem()
		id := ref.FieldByName("ID").Int()
		if id == 0 {
			if err := db.Mysql().Create(tmp); err != nil {
				g.Code = values.CodeRetry
				return
			}
		} else {
			update := map[string]interface{}{}
			for k := range v {
				field, ok := reft.FieldByName(k)
				if !ok {
					field, ok = util.GetStructFieldByJsonTag(tmp, k)
					if !ok {
						continue
					}
					k = field.Name
				}
				tag := field.Tag.Get("web")
				if tag == "" || tag == "-" {
					continue
				}
				update[tag] = ref.FieldByName(k).Interface()
			}
			// update := util.StructToMap(tmp, "web")
			model := reflect.New(reflect.TypeOf(element).Elem())
			model.Elem().FieldByName("ID").SetInt(id)
			// log.Debug("element:%v", element)
			log.Debug("update:%v", update)
			log.Debug("model:%v", model)
			if err := db.Mysql().Update(model.Interface(), update); err != nil {
				g.Code = values.CodeRetry
				return
			}
		}
	}
	pass = true
	return
}

func (g *Gin) MDel(id int, element interface{}) (pass bool) {
	tmp := reflect.New(reflect.TypeOf(element).Elem())
	tmp.Elem().FieldByName("ID").SetInt(int64(id))
	if !db.Mysql().Exist(tmp.Interface()) {
		g.Code = values.CodeParam
		g.Msg = "该id不存在"
		return
	}
	if err := db.Mysql().Del(tmp.Interface()); err != nil {
		g.Code = values.CodeRetry
		return
	}
	pass = true
	return
}