""" 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, get_profile, \
    get_account_categories, get_account_herds, get_account_maintainers
from djeuscan.models import Version, Package, Herd, Maintainer, EuscanResult, \
    VersionLog, RefreshPackageQuery, ProblemReport, Category, Overlay
from djeuscan.forms import WorldForm, PackagesForm, ProblemReportForm, \
    PreferencesForm
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

    favourited = False
    if request.user.is_authenticated():
        try:
            category = Category.objects.get(name=category)
            favourited = category in get_profile(request.user).categories.all()
        except Category.DoesNotExist:
            pass

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


@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

    favourited = False
    if request.user.is_authenticated():
        if herd in get_profile(request.user).herds.all():
            favourited = True

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


@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

    favourited = False
    if request.user.is_authenticated():
        if maintainer in get_profile(request.user).maintainers.all():
            favourited = True

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


@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

    favourited = False
    if request.user.is_authenticated():
        try:
            overlay = Overlay.objects.get(name=overlay)
            favourited = overlay in get_profile(request.user).overlays.all()
        except Overlay.DoesNotExist:
            pass

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


@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

    favourited = False
    if request.user.is_authenticated():
        if package in get_profile(request.user).packages.all():
            favourited = True

    try:
        refresh_query = RefreshPackageQuery.objects.get(package=package)
    except RefreshPackageQuery.DoesNotExist:
        refresh_requested = False
        refresh_pos = None
    else:
        refresh_requested = request.user in refresh_query.users.all()
        refresh_pos = refresh_query.position

    return {
        'package': package,
        'packaged': packaged,
        'upstream': upstream,
        'vlog': vlog,
        'log': log,
        'msg': log.messages if log else "",
        'last_scan': last_scan,
        'favourited': favourited,
        'refresh_requested': refresh_requested,
        'refresh_pos': refresh_pos,
    }


@login_required
@render_to('euscan/problem.html')
def problem(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)

    log = EuscanResult.objects.filter(package=package).\
                               order_by('-datetime')[:1]
    log = log[0] if log else None

    thanks_for_reporting = False

    if request.method == "POST":
        form = ProblemReportForm(package, request.POST)
        if form.is_valid():
            ProblemReport(
                package=package,
                version=form.cleaned_data["version"],
                subject=form.cleaned_data["subject"],
                message=form.cleaned_data["message"],
            ).save()
            thanks_for_reporting = True
    else:
        form = ProblemReportForm(package)

    return {
        'form': form,
        'thanks_for_reporting': thanks_for_reporting,
        'package': package,
        'packaged': packaged,
        'upstream': upstream,
        'msg': log.messages if log else "",
    }


@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)
    packages_ids = [p.pk for p in packages]

    favourited = False
    if request.user.is_authenticated():
        profile = get_profile(request.user)
        if len(packages) == len(profile.packages.filter(id__in=packages_ids)):
            favourited = True

    return {
        'packages': packages,
        'packages_ids': packages_ids,
        'favourited': favourited
    }


@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, category, package):
    pkg = get_object_or_404(Package, category=category, name=package)

    obj, created = RefreshPackageQuery.objects.get_or_create(package=pkg)

    if request.user in \
       RefreshPackageQuery.objects.get(package=pkg).users.all():
        return {"result": "failure"}

    obj.users.add(request.user)
    if not created:
        obj.priority += 1
        obj.save()
    if created:
        from djeuscan.tasks import consume_refresh_queue
        consume_refresh_queue.delay()
    return {"result": "success", "position": obj.position}


@login_required
@render_to('euscan/accounts/index.html')
def accounts_index(request):

    user = request.user
    upstream_k = lambda c: c["n_versions"] - c["n_packaged"] - c["n_overlay"]

    categories = sorted(get_account_categories(user),
                        key=upstream_k, reverse=True)
    c_upstream = sum([upstream_k(c) for c in categories])
    herds = sorted(get_account_herds(request.user),
                   key=upstream_k, reverse=True)
    h_upstream = sum([upstream_k(c) for c in herds])
    maintainers = sorted(get_account_maintainers(request.user),
                         key=upstream_k, reverse=True)
    m_upstream = sum([upstream_k(c) for c in maintainers])
    packages = sorted(
        get_profile(user).packages.all(),
        key=lambda p: p.n_versions - p.n_packaged - p.n_overlay,
        reverse=True
    )
    p_upstream = sum(
        [c.n_versions - c.n_packaged - c.n_overlay for c in packages]
    )
    return {
        "categories": categories, "categories_upstream": c_upstream,
        "herds": herds, "herds_upstream": h_upstream,
        "maintainers": maintainers, "maintainers_upstream": m_upstream,
        "packages": packages, "packages_upstream": p_upstream,
    }


@login_required
@render_to('euscan/accounts/preferences.html')
def accounts_preferences(request):
    user = request.user
    profile = get_profile(user)

    updated = False
    if request.method == "POST":
        form = PreferencesForm(request.POST)
        if form.is_valid():
            user.first_name = form.cleaned_data["first_name"]
            user.last_name = form.cleaned_data["last_name"]
            user.email = form.cleaned_data["email"]
            user.save(force_update=True)

            profile.upstream_info = form.cleaned_data["upstream_info"]
            profile.portage_info = form.cleaned_data["portage_info"]

            profile.save(force_update=True)

            updated = True
    else:
        initial_data = {
            "first_name": user.first_name,
            "last_name": user.last_name,
            "email": user.email,
            "upstream_info": profile.upstream_info,
            "portage_info": profile.portage_info,
        }
        form = PreferencesForm(initial_data)
    return {"form": form, "updated": updated}


@login_required
@render_to('euscan/accounts/categories.html')
def accounts_categories(request):
    return {"categories": get_account_categories(request.user)}


@login_required
@render_to('euscan/accounts/herds.html')
def accounts_herds(request):
    return {"herds": get_account_herds(request.user)}


@login_required
@render_to('euscan/accounts/maintainers.html')
def accounts_maintainers(request):
    return {"maintainers": get_account_maintainers(request.user)}


@login_required
@render_to('euscan/accounts/packages.html')
def accounts_packages(request):
    return {"packages": get_profile(request.user).packages.all()}


@login_required
@render_to('euscan/accounts/overlays.html')
def accounts_overlays(request):
    overlays = [obj.name for obj in get_profile(request.user).overlays.all()]
    return {"overlays": overlays}


@login_required
@require_POST
@ajax_request
def favourite_package(request, category, package):
    obj = get_object_or_404(Package, category=category, name=package)
    get_profile(request.user).packages.add(obj)
    return {"success": True}


@login_required
@require_POST
@ajax_request
def unfavourite_package(request, category, package):
    package = get_object_or_404(Package, category=category, name=package)
    get_profile(request.user).packages.remove(package)
    return {"success": True}


@login_required
@require_POST
@ajax_request
def favourite_herd(request, herd):
    obj = get_object_or_404(Herd, herd=herd)
    get_profile(request.user).herds.add(obj)
    return {"success": True}


@login_required
@require_POST
@ajax_request
def unfavourite_herd(request, herd):
    herd = get_object_or_404(Herd, herd=herd)
    get_profile(request.user).herds.remove(herd)
    return {"success": True}


@login_required
@require_POST
@ajax_request
def favourite_maintainer(request, maintainer_id):
    obj = get_object_or_404(Maintainer, pk=maintainer_id)
    get_profile(request.user).maintainers.add(obj)
    return {"success": True}


@login_required
@require_POST
@ajax_request
def unfavourite_maintainer(request, maintainer_id):
    maintainer = get_object_or_404(Maintainer, pk=maintainer_id)
    get_profile(request.user).maintainers.remove(maintainer)
    return {"success": True}


@login_required
@require_POST
@ajax_request
def favourite_category(request, category):
    obj = Category.objects.get(name=category)
    get_profile(request.user).categories.add(obj)
    return {"success": True}


@login_required
@require_POST
@ajax_request
def unfavourite_category(request, category):
    obj = Category.objects.get(name=category)
    get_profile(request.user).categories.remove(obj)
    return {"success": True}


@login_required
@require_POST
@ajax_request
def favourite_overlay(request, overlay):
    obj = Overlay.objects.get(name=overlay)
    get_profile(request.user).overlays.add(obj)
    return {"success": True}


@login_required
@require_POST
@ajax_request
def unfavourite_overlay(request, overlay):
    obj = Overlay.objects.get(name=overlay)
    get_profile(request.user).overlays.remove(obj)
    return {"success": True}


@login_required
@require_POST
@ajax_request
def favourite_world(request):
    if not "packages[]" in request.POST:
        return {"success": False}
    packages = request.POST.getlist("packages[]")
    objs = Package.objects.filter(id__in=packages)
    get_profile(request.user).packages.add(*objs)
    return {"success": True}


@login_required
@require_POST
@ajax_request
def unfavourite_world(request):
    if not "packages[]" in request.POST:
        return {"success": False}
    packages = request.POST.getlist("packages[]")
    objs = Package.objects.filter(id__in=packages)
    get_profile(request.user).packages.remove(*objs)
    return {"success": True}