package main

import (
	//"fmt"
	"fmt"
	"log"
	"net"
	"os"
	"os/exec"
	"strings"

	"github.com/joho/godotenv"
)

func main() {
	err := godotenv.Load()
	if err != nil {
		log.Println("Error al leer .env", err)
		os.Exit(1)
	}
	IP_SERVER := os.Getenv("IP_SERVER")

	listener, err := net.Listen("tcp", IP_SERVER)
	if err != nil {
		log.Println("Error al abrir el puerto.", err)
	}
	defer listener.Close()
	for {
		conn, err := listener.Accept()
		if err != nil {
			log.Println("Error al aceptar la conexion.", err)
		}
		go menuController(conn)
	}
}

func menuController(conn net.Conn) {
	var out string
	comandoRaw := make([]byte, 1024)
	n, err := conn.Read(comandoRaw)
	if err != nil {
		log.Println(err)
	}
	comandoString := strings.TrimSpace(string(comandoRaw[:n]))
	switch comandoString {
	case "play":
		out = playSong(conn)
	case "pause":
		out = pauseSong(conn)
	case "info":
		out = infoSong(conn)
	case "next":
		out = nextSong(conn)
	case "addsong":
		addSong(conn)
	}
	if out != "" {
		_, err = conn.Write([]byte(out))
		if err != nil {
			log.Println("Error al enviar la informacion", err)
		}
	}
}

func playSong(conn net.Conn) string {
	cmd := exec.Command("mpc", "play")
	output, err := cmd.CombinedOutput()
	if err != nil {
		log.Println("Error al reproducir musica", err)
	}
	return string(output)
}

func pauseSong(conn net.Conn) string {
	cmd := exec.Command("mpc", "pause")
	output, err := cmd.CombinedOutput()
	if err != nil {
		log.Println("Error al pausar musica", err)
	}
	return string(output)
}

func infoSong(conn net.Conn) string {
	cmd := exec.Command("mpc")
	output, err := cmd.CombinedOutput()
	if err != nil {
		log.Println("Error al solicitar informacion", err)
	}
	return string(output)
}

func nextSong(conn net.Conn) string {
	cmd := exec.Command("mpc", "next")
	output, err := cmd.CombinedOutput()
	if err != nil {
		log.Println("Error al reproducir siguiente cancion", err)
	}
	return string(output)
}

func addSong(conn net.Conn) {
	defer conn.Close()
	cmd := exec.Command("mpc", "listall")
	cmd.Stdout = conn
	cmd.Run()
	if tcpConn, ok := conn.(*net.TCPConn); ok {
		tcpConn.CloseWrite()
	}
	bufSong := make([]byte, 1024)
	n, err := conn.Read(bufSong)
	if err != nil {
		log.Println("Error al recibir cancion", err)
	}
	fmt.Printf("%s, agregado por %s", strings.TrimSpace(string(bufSong[:n])), conn.RemoteAddr())
	cmdmpc := exec.Command("bash", "-c", fmt.Sprintf("mpc insert %q && mpc next >/dev/null && mpc play", strings.TrimSpace(string(bufSong[:n]))))
	_, err = cmdmpc.CombinedOutput()
	if err != nil {
		log.Println("Error al reproducir cancion", err)
	}
	conn.Close()
}