package routers

import (
	"encoding/json"
	"io/ioutil"
	"log"
	"main/models"
	"main/utils"
	"net/http"
	"strconv"

	"github.com/gorilla/mux"
	"github.com/gorilla/websocket"
)

func TasksGet(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)
	listview.List = models.QueryTasks(listview.Page, listview.PageSize)
	listview.Total = models.CountTasks()
	listview.Next = listview.Page*listview.PageSize < listview.Total
	w.Header().Set("Content-Type", "application/json; charset=utf-8")
	w.Write(listview.ToJSON())
}

func TasksPost(w http.ResponseWriter, r *http.Request) {
	var task models.Task
	body, err := ioutil.ReadAll(r.Body)
	if err != nil {
		log.Println(err)
		return
	}
	defer r.Body.Close()
	if err = json.Unmarshal(body, &task); err != nil {
		log.Println(err)
		return
	}
	task.Create()
	w.Header().Set("Content-Type", "application/json; charset=utf-8")
	w.Write(utils.ToJSON(task))
}

func TasksItemGet(w http.ResponseWriter, r *http.Request) {
	if r.Header.Get("Upgrade") == "websocket" {
		vars := mux.Vars(r)
		id, _ := strconv.Atoi(vars["id"])
		task := models.QueryTask(id)
		if task.ID == 0 {
			w.WriteHeader(http.StatusNotFound)
			return
		}
		upgrader := websocket.Upgrader{}
		ws, err := upgrader.Upgrade(w, r, nil)
		if err != nil {
			log.Println(err)
			return
		}
		defer ws.Close()
		for {
			_, message, err := ws.ReadMessage()
			if err != nil {
				log.Println(err)
				break
			}
			task.Status = string(message)
			task.Update()
		}
		return
	}
	task := models.Task{ID: utils.ParamInt(mux.Vars(r)["id"], 0)}
	task.Get()
	w.Header().Set("Content-Type", "application/json; charset=utf-8")
	w.Write(utils.ToJSON(task))
}

func TasksItemPatch(w http.ResponseWriter, r *http.Request) {
	var task models.Task
	body, err := ioutil.ReadAll(r.Body)
	if err != nil {
		log.Println(err)
		return
	}
	defer r.Body.Close()
	if err = json.Unmarshal(body, &task); err != nil {
		log.Println(err)
		return
	}
	task.ID = utils.ParamInt(mux.Vars(r)["id"], 0)
	task.Update()
	w.Header().Set("Content-Type", "application/json; charset=utf-8")
	w.Write(utils.ToJSON(task))
}

func TasksItemDelete(w http.ResponseWriter, r *http.Request) {
	task := models.Task{ID: utils.ParamInt(mux.Vars(r)["id"], 0)}
	task.Delete()
	if task.ID == 0 {
		w.WriteHeader(http.StatusNotFound)
		return
	}
	task.Delete()
	w.WriteHeader(http.StatusNoContent)
}