package main

import (
	"encoding/json"
	"io"
	"log"
	"net/http"
	"os"
)

func init() {
	log.SetFlags(log.Lmicroseconds | log.Lshortfile)
	logFile, err := os.Create("main.log")
	if err != nil {
		log.Printf("Error creating log file: %v", err)
		os.Exit(1)
	}
	logger := io.MultiWriter(os.Stdout, logFile)
	log.SetOutput(logger)
}

const DOWNLOAD_WORKERS = 10

func main() {
	downloadQueue := make(chan *DownloadTask, 100)
	for i := 0; i < DOWNLOAD_WORKERS; i++ {
		worker := &DownloadWorker{id: i, input: downloadQueue}
		go worker.Run()
	}

	http.HandleFunc("/download", func(responseWriter http.ResponseWriter, request *http.Request) {
		defer request.Body.Close()

		req := DownloadRequest{}
		err := json.NewDecoder(request.Body).Decode(&req)
		if err != nil {
			log.Printf("Error parsing JSON: %v", err)
			http.Error(responseWriter, "Error parsing JSON", http.StatusBadRequest)
			return
		}

		downloadQueue <- &DownloadTask{Url: req.Link}
	})
	log.Println("Server starting on :5000")
	err := http.ListenAndServe(":5000", nil)
	if err != nil {
		log.Println("Error starting server:", err)
	}
}