#!/usr/bin/python3

from __future__ import absolute_import, print_function

import mimetypes
import os
import os.path
import pprint
import sys
from urllib.parse import quote
from wsgiref.simple_server import make_server
from wsgiref.util import setup_testing_defaults


CWD = os.getcwd()
sys.path.insert(0, CWD)
sys.path.insert(1, os.path.join(CWD, 'www/lib'))
sys.path.insert(1, os.path.join(CWD, 'www/kojiweb'))
import wsgi_publisher


def get_url(environ):
    url = environ['wsgi.url_scheme']+'://'

    if environ.get('HTTP_HOST'):
        url += environ['HTTP_HOST']
    else:
        url += environ['SERVER_NAME']

        if environ['wsgi.url_scheme'] == 'https':
            if environ['SERVER_PORT'] != '443':
                url += ':' + environ['SERVER_PORT']
        else:
            if environ['SERVER_PORT'] != '80':
                url += ':' + environ['SERVER_PORT']

    url += quote(environ.get('SCRIPT_NAME', ''))
    url += quote(environ.get('PATH_INFO', ''))
    if environ.get('QUERY_STRING'):
        url += '?' + environ['QUERY_STRING']
    return url

FIRST = True


def do_static(environ, start_response):
    redirect = os.environ.get('STATIC_URL', '')
    if redirect:
        environ['STATIC_URL'] = redirect
        return redirect_static(environ, start_response)
    # otherwise serve our local static files
    path = environ.get('PATH_INFO', '')
    assert path.startswith('/koji-static')
    path = path[12:]
    path = path.lstrip('/')
    fn = os.path.join(CWD, 'www/static', path)
    if not os.path.exists(fn):
        print("No such file: %s" % fn)
        return do_404(environ, start_response)
    size = os.path.getsize(fn)
    ctype, encoding = mimetypes.guess_type(fn)
    headers = [
            ('Content-Length', str(size)),
            ('Content-Type', ctype),
            ]
    start_response('200 OK', headers)
    return iter_file(fn)


def do_404(environ, start_response):
    content = 'URL not found\n'
    headers = [
            ('Content-Length', str(len(content))),
            ('Content-Type', 'text/plain'),
            ]
    start_response('404 Not Found', headers)
    return [content]


def iter_file(fn):
    with open(fn, 'rb') as fo:
        while True:
            chunk = fo.read(8192)
            if not chunk:
                break
            yield chunk


def redirect_static(environ, start_response):
    response = ''
    headers = [
            ('Content-Length', str(len(response))),
            ('Content-Type', "text/plain"),
            ('Location', environ['STATIC_URL'] + environ['PATH_INFO']),
            ]
    start_response('302 Found', headers)
    return [response]


def set_config(environ):
    lconfig = "%s/devtools/fakeweb.conf" % os.getcwd()
    lconfigd = "%s/devtools/fakeweb.conf.d" % os.getcwd()
    if os.path.exists(lconfig) or os.path.exists(lconfigd):
        environ['koji.web.ConfigFile'] = lconfig
        environ['koji.web.ConfigDir'] = lconfigd


def application(environ, start_response):
    global FIRST
    setup_testing_defaults(environ)
    # provide some needed info
    environ['SCRIPT_FILENAME'] = wsgi_publisher.__file__
    environ['REQUEST_URI'] = get_url(environ)
    set_config(environ)
    if FIRST:
        pprint.pprint(environ)
        FIRST = False
    path = environ.get('PATH_INFO', '')
    if path.startswith('/koji-static'):
        return do_static(environ, start_response)
    return wsgi_publisher.application(environ, start_response)


def main():
    # koji.add_file_logger('koji', 'fakeweb.log')
    httpd = make_server('', 8000, application)
    print("Serving kojiweb on http://localhost:8000 ...")
    httpd.serve_forever()

if __name__ == '__main__':
    main()