package main

import (
	"encoding/json"
	"fmt"
	"io/ioutil"
	"os"
	"path/filepath"
	"time"

	"github.com/iris-contrib/middleware/cors"
	"github.com/kataras/iris/v12"
)

const INTERVAL_PERIOD time.Duration = 24 * time.Hour
const HOUR_TO_TICK int = 0
const MINUTE_TO_TICK int = 1
const SECOND_TO_TICK int = 03

type jobTicker struct {
	t *time.Timer
}

func main() {
	go mainTicker()

	app := iris.New()
	crs := cors.New(cors.Options{
		AllowedOrigins:   []string{"*"}, // allows everything, use that to change the hosts.
		AllowCredentials: false,
	})

	v1 := app.Party("/", crs).AllowMethods(iris.MethodOptions) // <- important for the preflight.
	{
		v1.Post("/", func(ctx iris.Context) {
			var data map[string]interface{}
			err := ctx.ReadJSON(&data)

			if err != nil {
				ctx.StopWithStatus(iris.StatusBadRequest)
				ctx.WriteString(err.Error())
				ctx.WriteString(err.Error())
				return
			}
			file, _ := json.MarshalIndent(data, "", " ")
			curTime := time.Now().UTC()
			err = ioutil.WriteFile(fmt.Sprintf("./%s/%v", curTime.Format("2006-01-02"), curTime.UnixNano())+"_data.json", file, 0644)
			if err != nil {
				t := time.Now().UTC()
				newpath := filepath.Join(".", t.Format("2006-01-02"))
				os.MkdirAll(newpath, os.ModePerm)
				_ = ioutil.WriteFile(fmt.Sprintf("./%s/%v", curTime.Format("2006-01-02"), curTime.UnixNano())+"_data.json", file, 0644)
			}

			ctx.JSON(iris.Map{
				"success": true,
			})
		})
	}
	app.Listen(":80")
}

func getNextTickDuration() time.Duration {
	now := time.Now().UTC()
	nextTick := time.Date(now.Year(), now.Month(), now.Day(), HOUR_TO_TICK, MINUTE_TO_TICK, SECOND_TO_TICK, 0, time.UTC)
	if nextTick.Before(now) {
		nextTick = nextTick.Add(INTERVAL_PERIOD)
	}
	return nextTick.Sub(time.Now().UTC())
}

func NewJobTicker() jobTicker {
	t := time.Now().UTC()
	newpath := filepath.Join(".", t.Format("2006-01-02"))
	os.MkdirAll(newpath, os.ModePerm)
	return jobTicker{time.NewTimer(getNextTickDuration())}
}

func (jt jobTicker) updateJobTicker() {
	fmt.Println("next tick here")
	t := time.Now().UTC()
	newpath := filepath.Join(".", t.Format("2006-01-02"))
	os.MkdirAll(newpath, os.ModePerm)
	jt.t.Reset(getNextTickDuration())
}

func mainTicker() {
	jt := NewJobTicker()
	for {
		<-jt.t.C
		fmt.Println(time.Now(), "- just ticked")
		jt.updateJobTicker()
	}
}