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import socket
import os

# Define socket host and port
SERVER_HOST = '0.0.0.0'
SERVER_PORT = 8080

# Create socket
server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# Reuse the socket
server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)

# Bind to the address
server_socket.bind((SERVER_HOST, SERVER_PORT))

# Listen for incoming connections
server_socket.listen(1)
print(f"Listening on port {SERVER_PORT} ...")

# HTTP response templates
HTTP_HEADER_TEMPLATE = "HTTP/1.1 {status_code} {reason}\r\nContent-Type: {content_type}\r\nContent-Length: {content_length}\r\n\r\n"
HTTP_404_BODY = "<html><body><h1>404 Not Found</h1></body></html>"

def generate_headers(method, file_path):
    if not os.path.isfile(file_path):
        headers = HTTP_HEADER_TEMPLATE.format(status_code=404, reason="Not Found", content_type="text/html", content_length=len(HTTP_404_BODY))
        return headers, HTTP_404_BODY
    else:
        file_size = os.path.getsize(file_path)
        headers = HTTP_HEADER_TEMPLATE.format(status_code=200, reason="OK", content_type="text/html", content_length=file_size)
        return headers, None

def handle_request(client_connection):
    request = client_connection.recv(1024).decode()
    headers, body = request.split('\r\n', 1)
    request_line = headers.splitlines()[0]
    request_method, path, _ = request_line.split()

    # Remove the leading '/' from the path
    file_path = path.lstrip('/')

    # Default file path
    if file_path == '':
        file_path = 'index.html'

    headers, body = generate_headers(request_method, file_path)

    # Send HTTP headers
    client_connection.sendall(headers.encode())

    # If it's a GET request, send the file content
    if request_method == 'GET' and body is None:
        with open(file_path, 'rb') as file:
            while True:
                file_data = file.read(1024)
                if not file_data:
                    break
                client_connection.sendall(file_data)

    # If it's a HEAD request or file not found, we don't send the file content
    elif body is not None:
        client_connection.sendall(body.encode())

# Handle client requests
try:
    while True:
        # Wait for client connections
        client_connection, client_address = server_socket.accept()
        handle_request(client_connection)
        # Close the client connection
        client_connection.close()
except KeyboardInterrupt:
    print("Closing the server...")
    server_socket.close()
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