#!/usr/bin/env python3

# Copyright (c) 2021 bandali
#
# Copying and distribution of this file, with or without modification,
# are permitted in any medium without royalty provided the copyright
# notice and this notice are preserved.  This file is offered as-is,
# without any warranty.

import os
from http.server import SimpleHTTPRequestHandler
import socketserver

try:
    PORT = int(os.getenv('PORT', 8000))
except ValueError:
    print('PORT must be in integer')
    exit(1)

ADDR = os.getenv('ADDR', '127.0.0.1')

class HttpRequestHandler(SimpleHTTPRequestHandler):
    extensions_map = dict(SimpleHTTPRequestHandler.extensions_map)
    extensions_map.update({'': 'text/plain;charset=UTF-8'})
    extensions_map.update({'.txt': 'text/plain;charset=UTF-8'})

    def do_GET(self):
        if not os.path.isfile(os.getcwd() + self.path):
            exts = ['html', 'txt']
            for ext in exts:
                p = ".".join((self.path, ext))
                if os.path.isfile("".join((os.getcwd(), p))):
                    self.path = p
                    break
        super().do_GET()

class ReuseAddrTCPServer(socketserver.TCPServer):
    allow_reuse_address = True

with ReuseAddrTCPServer((ADDR, PORT), HttpRequestHandler) as httpd:
    try:
        print("serving at port", PORT)
        httpd.serve_forever()
    except KeyboardInterrupt:
        pass
    except Exception as e:
        logger.exception(e)