package net

import (
	"cimeyclust.com/steel/pkg/cmd"
	"context"
	"fmt"
	"net"
	"time"
)

// Start Starts the TCP server on the specified address.
func Run(baseCtx context.Context, addr string) {
	ctx, cancel := context.WithCancel(baseCtx)
	defer cancel()

	// Start listening on the specified address
	listener, err := net.Listen("tcp", addr)
	if err != nil {
		cmd.Logger.Error("Error starting TCP server: %v")
		return
	}

	// Close the listener when the application closes.
	defer listener.Close()

	cmd.Logger.Info(fmt.Sprintf("Listening on %s", addr))

	// var wg sync.WaitGroup

	go func() {
		for {
			// Print test every second
			select {
			case <-ctx.Done():
				return
			default:
				cmd.Logger.Info("Test")
			}
			time.Sleep(1 * time.Second)
		}
	}()

	// Listen for an incoming connection in a goroutine.
	go func() {
		go func() {
			// Waiting for the context to be done
			<-ctx.Done()

			// Waiting for the listener to be closed, so the port is safely released
			listener.Close()
		}()
		for {
			conn, err := listener.Accept()
			if err != nil {
				select {
				case <-ctx.Done():
					return
				default:
					cmd.Logger.Error(fmt.Sprintf("Error while accepting conn: %v", err))
				}
				continue
			}

			// Handle connections in a new goroutine.
			go handleRequest(conn)
		}
	}()

	// Wait for all components to finish
	<-ctx.Done()
}

// handleRequest handles incoming requests.
func handleRequest(conn net.Conn) {
	// Close the connection when you're done with it.
	defer conn.Close()

	// Make a buffer to hold incoming data.
	buf := make([]byte, 1024)

	// Read the incoming connection into the buffer.
	_, err := conn.Read(buf)
	if err != nil {
		cmd.Logger.Error(fmt.Sprintf("Error reading: %v", err))
		return
	}

	// Send a response back to person contacting us.
	conn.Write([]byte("Hello, World!\n"))
}