package routers

import (
	"crypto/md5"
	"fmt"
	"main/configs"
	"main/models"
	"main/utils"
	"net/http"

	"github.com/google/uuid"
	"github.com/gorilla/mux"
)

// 獲取用戶列表
func UsersGet(w http.ResponseWriter, r *http.Request) {
	var listview models.ListView
	listview.Page = utils.ParamInt(r.URL.Query().Get("page"), 1)
	listview.PageSize = utils.ParamInt(r.URL.Query().Get("pageSize"), 10)
	var user_list []models.User
	db := configs.ORMDB()
	db.Offset((listview.Page - 1) * listview.PageSize).Limit(listview.PageSize).Find(&user_list)
	for _, user := range user_list {
		listview.List = append(listview.List, user)
	}
	db.Model(&models.User{}).Count(&listview.Total)
	listview.Next = listview.Page*listview.PageSize < int(listview.Total)
	listview.WriteJSON(w)
}

// 創建用戶
func UsersPost(w http.ResponseWriter, r *http.Request) {
	var form map[string]interface{} = utils.BodyRead(r)
	if form["name"] == nil || form["email"] == nil || form["password"] == nil {
		w.WriteHeader(http.StatusBadRequest)
		w.Write([]byte("400 - name, email, password cannot be empty"))
		return
	}
	// 創建用戶
	var slat string = uuid.New().String()
	var user models.User = models.User{
		Name:     form["name"].(string),
		Email:    form["email"].(string),
		Password: fmt.Sprintf("%x", md5.Sum([]byte(form["password"].(string)+slat))),
		Slat:     slat,
	}
	// 寫入數據庫
	if err := configs.ORMDB().Create(&user).Error; err != nil {
		w.WriteHeader(http.StatusBadRequest)
		w.Write([]byte("400 - " + err.Error()))
		return
	}
	// 返回信息
	w.Header().Set("Content-Type", "application/json; charset=utf-8")
	w.Write(utils.ToJSON(user))
}

// 獲取用戶
func UsersItemGet(w http.ResponseWriter, r *http.Request) {
	user := models.User{ID: utils.ParamInt(mux.Vars(r)["id"], 0)}
	if err := configs.ORMDB().First(&user).Error; err != nil {
		w.WriteHeader(http.StatusNotFound)
		w.Write([]byte("404 - " + err.Error()))
		return
	}
	w.Header().Set("Content-Type", "application/json; charset=utf-8")
	w.Write(utils.ToJSON(user))
}

// 更新用戶
func UsersItemPatch(w http.ResponseWriter, r *http.Request) {
	form := utils.BodyRead(r)
	user := models.User{ID: utils.ParamInt(mux.Vars(r)["id"], 0)}
	configs.ORMDB().First(&user)
	if name, ok := form["name"].(string); ok {
		user.Name = name
	}
	if email, ok := form["email"].(string); ok {
		user.Email = email
	}
	if password, ok := form["password"].(string); ok {
		user.Slat = uuid.New().String()
		user.Password = fmt.Sprintf("%x", md5.Sum([]byte(password+user.Slat)))
	}
	if admin, ok := form["admin"].(bool); ok {
		user.Admin = admin
	}

	configs.ORMDB().Save(&user)
	w.Header().Set("Content-Type", "application/json; charset=utf-8")
	w.Write(utils.ToJSON(user))
}

// 刪除用戶
func UsersItemDelete(w http.ResponseWriter, r *http.Request) {
	user := models.User{ID: utils.ParamInt(mux.Vars(r)["id"], 0)}
	configs.ORMDB().Delete(&user)
	w.Header().Set("Content-Type", "application/json; charset=utf-8")
	w.Write(utils.ToJSON(user))
}