from django.contrib.admin.views.decorators import staff_member_required
from django.core.exceptions import PermissionDenied
from django.shortcuts import get_object_or_404, redirect, render

from .models import Candidate, Comment
from .forms import CommentForm, DownloadForm
from .emails import make_comment_email


def landing_page(request):
    candidates = Candidate.objects.all()
    return render(request, 'usethesource/landing_page.html', {'candidates': candidates})


def candidate_page(request, slug):
    candidate = get_object_or_404(Candidate, slug=slug)
    return render(request, 'usethesource/candidate.html', {'candidate': candidate, 'add': True})


def download_page(request, slug, download_type):
    candidate = get_object_or_404(Candidate, slug=slug)
    form = DownloadForm()
    if request.method == 'POST':
        form = DownloadForm(request.POST)
        url = candidate.source_url if download_type == 'source' else candidate.binary_url
        if not candidate.show_download_disclaimer or form.is_valid():
            return redirect(url)
    return render(
        request,
        'usethesource/download.html',
        {'form': form, 'candidate': candidate, 'download_type': download_type},
    )


@staff_member_required
def create_comment(request, slug):
    candidate = get_object_or_404(Candidate, slug=slug)
    if request.method == 'GET':
        form = CommentForm(initial={'post_to_list': True})
    else:
        form = CommentForm(request.POST)
        if form.is_valid():
            comment = form.save(commit=False)
            comment.candidate = candidate
            comment.user = request.user
            comment.save()
            if 'post_to_list' in request.POST:
                email = make_comment_email(comment)
                email.send()
            return redirect('usethesource:view_comment', comment_id=comment.id, show_add='true')
    return render(request, 'usethesource/add_comment_form.html', {'form': form, 'candidate': candidate})


@staff_member_required
def edit_comment(request, comment_id):
    comment = get_object_or_404(Comment, id=comment_id)
    if request.user != comment.user and not request.user.has_perm('usethesource.change_comment'):
        raise PermissionDenied
    if request.method == 'GET':
        form = CommentForm(instance=comment)
    else:
        form = CommentForm(request.POST, instance=comment)
        if form.is_valid():
            comment = form.save()
            return redirect('usethesource:view_comment', comment_id=comment.id, show_add='false')
    return render(request, 'usethesource/edit_comment_form.html', {'form': form, 'comment': comment})


@staff_member_required
def view_comment(request, comment_id, show_add):
    show_add = show_add == 'true'
    comment = get_object_or_404(Comment, id=comment_id)
    return render(request, 'usethesource/returned_comment.html', {'comment': comment, 'candidate': comment.candidate, 'add': show_add})


@staff_member_required
def delete_comment(request, comment_id, show_add):
    comment = get_object_or_404(Comment, id=comment_id)
    if request.user != comment.user and not request.user.has_perm('usethesource.delete_comment'):
        raise PermissionDenied
    comment.delete()
    show_add = show_add == 'true'
    return render(request, 'usethesource/comment_deleted.html', {'comment': None, 'add': show_add})


@staff_member_required
def add_button(request, slug):
    candidate = get_object_or_404(Candidate, slug=slug)
    return render(request, 'usethesource/add_comment_button_partial.html', {'candidate': candidate})


def ccirt_process(request):
    return render(request, 'usethesource/ccirt_process.html', {})