""" Views """

import inspect
from annoying.decorators import render_to, ajax_request

from django.http import Http404
from django.shortcuts import get_object_or_404
from django.contrib.auth.decorators import login_required
from django.views.decorators.http import require_POST

from djeuscan.helpers import version_key, packages_from_names
from djeuscan.models import Version, Package, Herd, Maintainer, EuscanResult, \
    VersionLog, RefreshPackageQuery
from djeuscan.forms import WorldForm, PackagesForm
from djeuscan.tasks import admin_tasks
from djeuscan import charts


@render_to('euscan/index.html')
def index(request):
    context = {
        'n_packaged': Package.objects.n_packaged(),
        'n_overlay': Package.objects.n_overlay(),
        'n_versions': Package.objects.n_versions(),
        'n_upstream': Package.objects.n_upstream(),
        'n_packages': Package.objects.count(),
        'n_herds': Herd.objects.count(),
        'n_maintainers': Maintainer.objects.count(),
    }
    try:
        context['last_scan'] = EuscanResult.objects.latest().datetime
    except EuscanResult.DoesNotExist:
        context['last_scan'] = None

    return context


@render_to('euscan/logs.html')
def logs(request):
    return {}


@render_to('euscan/categories.html')
def categories(request):
    try:
        last_scan = EuscanResult.objects.latest().datetime
    except EuscanResult.DoesNotExist:
        last_scan = None

    return {'categories': Package.objects.categories(), 'last_scan': last_scan}


@render_to('euscan/category.html')
def category(request, category):
    packages = Package.objects.for_category(category, last_versions=True)

    if not packages:
        raise Http404

    try:
        last_scan = \
            EuscanResult.objects.for_category(category).latest().datetime
    except EuscanResult.DoesNotExist:
        last_scan = None

    return {'category': category, 'packages': packages, 'last_scan': last_scan}


@render_to('euscan/herds.html')
def herds(request):
    herds = Package.objects.herds()

    try:
        last_scan = EuscanResult.objects.latest().datetime
    except EuscanResult.DoesNotExist:
        last_scan = None

    return {'herds': herds, 'last_scan': last_scan}


@render_to('euscan/herd.html')
def herd(request, herd):
    herd = get_object_or_404(Herd, herd=herd)
    packages = Package.objects.for_herd(herd, last_versions=True)

    try:
        last_scan = EuscanResult.objects.for_herd(herd).latest().datetime
    except EuscanResult.DoesNotExist:
        last_scan = None

    return {'herd': herd, 'packages': packages, "last_scan": last_scan}


@render_to('euscan/maintainers.html')
def maintainers(request):
    maintainers = Package.objects.maintainers()

    try:
        last_scan = EuscanResult.objects.latest().datetime
    except EuscanResult.DoesNotExist:
        last_scan = None

    return {'maintainers': maintainers, 'last_scan': last_scan}


@render_to('euscan/maintainer.html')
def maintainer(request, maintainer_id):
    maintainer = get_object_or_404(Maintainer, pk=maintainer_id)
    packages = Package.objects.for_maintainer(maintainer, last_versions=True)

    try:
        last_scan = \
            EuscanResult.objects.for_maintainer(maintainer).latest().datetime
    except EuscanResult.DoesNotExist:
        last_scan = None

    return {
        'maintainer': maintainer,
        'packages': packages,
        'last_scan': last_scan
    }


@render_to('euscan/overlays.html')
def overlays(request):
    overlays = Package.objects.overlays()

    try:
        last_scan = EuscanResult.objects.latest().datetime
    except EuscanResult.DoesNotExist:
        last_scan = None

    return {'overlays': overlays, 'last_scan': last_scan}


@render_to('euscan/overlay.html')
def overlay(request, overlay):
    packages = Package.objects.for_overlay(overlay)
    if not packages:
        raise Http404

    try:
        last_scan = EuscanResult.objects.latest().datetime
    except EuscanResult.DoesNotExist:
        last_scan = None

    return {'overlay': overlay, 'packages': packages, 'last_scan': last_scan}


@render_to('euscan/package.html')
def package(request, category, package):
    package = get_object_or_404(Package, category=category, name=package)
    packaged = Version.objects.filter(package=package, packaged=True)
    upstream = Version.objects.filter(package=package, packaged=False)

    packaged = sorted(packaged, key=version_key)
    upstream = sorted(upstream, key=version_key)

    log = EuscanResult.objects.filter(package=package).\
                               order_by('-datetime')[:1]
    log = log[0] if log else None
    vlog = VersionLog.objects.for_package(package, order=True)

    try:
        last_scan = EuscanResult.objects.for_package(package).latest().datetime
    except EuscanResult.DoesNotExist:
        last_scan = None

    return {
        'package': package,
        'packaged': packaged,
        'upstream': upstream,
        'log': log,
        'vlog': vlog,
        'last_scan': last_scan
    }


@render_to('euscan/world.html')
def world(request):
    world_form = WorldForm()
    packages_form = PackagesForm()

    return {'world_form': world_form,
            'packages_form': packages_form}


@render_to('euscan/world_scan.html')
def world_scan(request):

    if 'world' in request.FILES:
        data = request.FILES['world'].read()
    elif 'packages' in request.POST:
        data = request.POST['packages']
    else:
        data = ""

    packages = packages_from_names(data)

    return {'packages': packages}


@render_to("euscan/about.html")
def about(request):
    return {}


@render_to("euscan/api.html")
def api(request):
    return {}


@render_to("euscan/statistics.html")
def statistics(request):
    return {}


def chart(request, **kwargs):
    from django.views.static import serve

    chart = kwargs['chart'] if 'chart' in kwargs else None

    if 'maintainer_id' in kwargs:
        kwargs['maintainer'] = get_object_or_404(
            Maintainer,
            id=kwargs['maintainer_id']
        )
    if 'herd' in kwargs:
        kwargs['herd'] = get_object_or_404(Herd, herd=kwargs['herd'])

    for kw in ('-small', '-weekly', '-monthly', '-yearly'):
        if chart.endswith(kw):
            if kw in ('-weekly', '-monthly', '-yearly'):
                kwargs['period'] = kw
            kwargs[kw] = True
            chart = chart[:-len(kw)]

    if chart == 'pie-packages':
        path = charts.pie_packages(**kwargs)
    elif chart == 'pie-versions':
        path = charts.pie_versions(**kwargs)
    elif chart == 'packages':
        path = charts.packages(**kwargs)
    elif chart == 'versions':
        path = charts.versions(**kwargs)
    else:
        raise Http404()

    return serve(request, path, document_root=charts.CHARTS_ROOT)


def chart_maintainer(request, **kwargs):
    return chart(request, **kwargs)


def chart_herd(request, **kwargs):
    return chart(request, **kwargs)


def chart_category(request, **kwargs):
    return chart(request, **kwargs)


@ajax_request
def registered_tasks(request):
    data = {}
    for task in admin_tasks:
        argspec = inspect.getargspec(task.run)
        data[task.name] = {
            "args": argspec.args,
            "defaults": argspec.defaults,
            "default_types": None
        }
        if argspec.defaults is not None:
            data[task.name].update({
                "defaults_types": [type(x).__name__ for x in argspec.defaults]
            })
    return {"tasks": data}


@login_required
@require_POST
@ajax_request
def refresh_package(request, query):
    obj, created = RefreshPackageQuery.objects.get_or_create(query=query)
    if not created:
        obj.priority += 1
        obj.save()
    return {"result": "success"}