import mimetypes
import os.path
from django.http import HttpResponse
from django.template.response import TemplateResponse

from conservancy.local_context_processors import fundgoal_lookup

STATIC_ROOT = os.path.abspath(os.path.dirname(__file__))
FILESYSTEM_ENCODING = 'utf-8'

def handler(request, errorcode):
    path = os.path.join('error', str(errorcode), 'index.html')
    fullpath = os.path.join(STATIC_ROOT, path)
    if not os.path.exists(fullpath):
        return HttpResponse("Internal error: " + path, status=int(errorcode))
    else:
        return TemplateResponse(request, path, status=int(errorcode))

def handler401(request):
    return handler(request, 401)

def handler403(request):
    return handler(request, 403)

def handler404(request):
    return handler(request, 404)

def handler500(request):
    return handler(request, 500)

def index(request, *args, **kwargs):
    path = request.path.lstrip(u'/')
    if path.endswith(u'/'):
        path += u'index.html'
    try:
        path_bytes = path.encode(FILESYSTEM_ENCODING)
    except UnicodeEncodeError:
        # If the path can't be expressed on the filesystem, it must not exist.
        return handler404(request)
    fullpath = os.path.join(STATIC_ROOT, path_bytes)
    if not os.path.exists(fullpath):
        return handler404(request)
    content_type, _ = mimetypes.guess_type(path)
    if content_type != 'text/html':
        return HttpResponse(open(fullpath, 'rb'), content_type)
    else:
        context = kwargs.copy()
        try:
            context['fundgoal'] = fundgoal_lookup(kwargs['fundraiser_sought'])
        except KeyError:
            pass
        return TemplateResponse(request, path, context)

def debug(request):
    path = request.get_full_path()
    path = path.lstrip('/')
    return HttpResponse("Hello, static world: " + path)