package modules

import (
	"bufio"
	"flag"
	"fmt"
	"os"
	"time"

	"git.dnix.de/an/xlog"
	"github.com/mmcdole/gofeed"
)

var feedsFeeds = flag.String("feeds_feeds", "feeds.txt", "Feed list file")
var feedsChannel = flag.String("feeds_channel", "", "Target channel")

func init() {
	MsgFuncs["feeds"] = feedsHandleMessage
	RunFuncs["feeds"] = feedsRun
}

func feedsRun() {
	time.Sleep(15 * time.Second)
	file, err := os.Open(*feedsFeeds)
	if err != nil {
		xlog.Fatal(err.Error())
	}
	defer file.Close()
	scanner := bufio.NewScanner(file)
	for scanner.Scan() {
		go feedsPoll(scanner.Text())
	}
	if err := scanner.Err(); err != nil {
		xlog.Fatal(err.Error())
	}
}

func feedsHandleMessage(m *Message) {
}

func feedsPoll(url string) {
	defer func() {
		if err := recover(); err != nil {
			xlog.Error(fmt.Sprintf("%v", err))
		}
	}()

	last := time.Now()
	for {
		fp := gofeed.NewParser()
		feed, _ := fp.ParseURL(url)
		if feed.Items == nil {
			xlog.Error("Feed %s appears to lack any items", feed.Title)
			return
		}
		for _, item := range feed.Items {
			if item.PublishedParsed == nil {
				xlog.Error("Feed %s appears to lack timestamps", feed.Title)
				break
			}
			if item.PublishedParsed.Unix() > last.Unix() {
				SayCh <- fmt.Sprintf("%s\n[FEEDS] %s : %s - %s\n", *feedsChannel, feed.Title, item.Title, item.Link)
			}
		}
		last = time.Now()
		time.Sleep(15 * time.Minute)
	}
}