import os

import django.http
import django.shortcuts
import django.template

import ComplexQueries
import DebTarHandler
import DiffGzHandler
import Conf
import models

def package_vers(request, package, version):
  pkg = models.SourcePackage.objects.get( name=package, version=version )
  ctx = django.template.RequestContext(request)
  tmpl = 'package_vers.html'
  diffhandler = None
  if pkg.diffgz_name:
    dgz = os.sep.join([Conf.archive_root, pkg.loc, pkg.diffgz_name])
    diffhandler = DiffGzHandler.DiffGzHandler(dgz)
  elif pkg.debtar_name:
    dtar = os.sep.join([Conf.archive_root, pkg.loc, pkg.debtar_name])
    diffhandler = DebTarHandler.DebTarHandler(dtar)
  extra = { 'pkg':pkg, 'ctx':ctx, 'conf':Conf, 'diffhandler':diffhandler }
  return django.shortcuts.render_to_response(tmpl, extra, context_instance=ctx)

def display_toc(request, index):
  packageIndex = ComplexQueries.PackageIndex(index)
  tmpl = 'letter_toc.html'
  extra = { 'index':index, 'packageIndex':packageIndex, 'conf':Conf }
  return django.shortcuts.render_to_response(tmpl, extra)


def display_patch(request, patchType, package, version, patchName):
  pkg = models.SourcePackage.objects.get( name=package, version=version )
  ctx = django.template.RequestContext(request)
  tmpl = 'patch_view.html'
  diffhandler = None
  if pkg.diffgz_name:
    dgz = os.sep.join([Conf.archive_root, pkg.loc, pkg.diffgz_name])
    diffhandler = DiffGzHandler.DiffGzHandler(dgz)
  elif pkg.debtar_name:
    dtar = os.sep.join([Conf.archive_root, pkg.loc, pkg.debtar_name])
    diffhandler = DebTarHandler.DebTarHandler(dtar)

  if patchType == "debianonly":
    patch = diffhandler.debiandir()
    patchTitle = "debian-dir only changes"
  elif patchType == "misc":
    patch = diffhandler.filterdiff(include=patchName)
    patchTitle = patchName
  elif patchType == "nondebian":
    patch = diffhandler.nondebiandir()
    patchTitle = "direct (non-packaging) changes"
  elif patchType == "series":
    patch = diffhandler.series().fetch(patchName)
    patchTitle = patchName

  extra = { 'pkg':pkg, 'patch':patch, 'patchType':patchType, 'conf':Conf,
            'patchName':patchName, 'patchTitle':patchTitle }
  return django.shortcuts.render_to_response(tmpl, extra, context_instance=ctx)

def download_patch(request, patchType, package, version, patchName):
  pkg = models.SourcePackage.objects.get( name=package, version=version )
  diffhandler = None
  if pkg.diffgz_name:
    dgz = os.sep.join([Conf.archive_root, pkg.loc, pkg.diffgz_name])
    diffhandler = DiffGzHandler.DiffGzHandler(dgz)
  elif pkg.debtar_name:
    dtar = os.sep.join([Conf.archive_root, pkg.loc, pkg.debtar_name])
    diffhandler = DebTarHandler.DebTarHandler(dtar)
  if patchType == "debianonly":
    patch = diffhandler.debiandir()
  elif patchType == "misc":
    patch = diffhandler.filterdiff(include=patchName)
  elif patchType == "nondebian":
    patch = diffhandler.nondebiandir()
  elif patchType == "series":
    patch = diffhandler.series().fetch(patchName)
  return django.http.HttpResponse(patch, mimetype="text/plain")