""" Composer for HTTP responses

This module contains a composer, which can compose responses to
HTTP requests from a client.
"""

import time

import webhttp.message
from webhttp.resource import Resource, FileExistError, FileAccessError
import webhttp.weblogging as logging

class ResponseComposer:
    """Class that composes a HTTP response to a HTTP request"""

    def __init__(self, timeout):
        """Initialize the ResponseComposer
        
        Args:
            timeout (int): connection timeout
        """
        self.timeout = timeout
    
    def compose_response(self, request):
        """Compose a response to a request
        
        Args:
            request (webhttp.Request): request from client

        Returns:
            webhttp.Response: response to request

        """
        response = webhttp.message.Response()

        # Stub code
        try:
            resource = Resource(request.uri)
            response.code = 200
            response.set_header('Content-Length', resource.get_content_length())
            response.set_header('Connection', 'close')
            response.body = resource.get_content()
        except FileExistError:
            response.code = 404
            response.set_header("Content-Length", 9)
            response.set_header("Connection", "close")
            response.body = "Not found"
        except FileAccessError:
            response.code = 403
            response.set_header("Content-Length", 13)
            response.set_header("Connection", "close")
            response.body = "Access denied"

        return response

    def make_date_string(self):
        """Make string of date and time
        
        Returns:
            str: formatted string of date and time
        """
        return time.strftime("%a, %d %b %Y %H:%M:%S", time.localtime())