# Copyright (C) 2015-2022 The Sipwise Team - http://sipwise.com
#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the Free
# Software Foundation, either version 3 of the License, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
# more details.
#
# You should have received a copy of the GNU General Public License along
# with this program.  If not, see <http://www.gnu.org/licenses/>.
import logging
import re

from django.contrib.auth.decorators import login_required
from django.http import Http404
from django.http import JsonResponse
from django.shortcuts import render
from django.views.decorators.http import require_http_methods
from rest_framework import generics
from rest_framework import status
from rest_framework.response import Response

from . import _common_versions
from . import _hash_versions
from . import _projects_versions
from . import regex_mr
from .. import serializers
from .. import tasks
from ..conf import settings
from ..forms.docker import BuildDockerForm
from ..models import DockerImage
from ..models import DockerTag
from ..models import Project
from ..utils import docker

logger = logging.getLogger(__name__)


def _get_docker_tags(project, tag=None):
    repos = docker.get_docker_repositories()
    r = re.compile(".*%s.*" % project)
    project_repos = filter(r.match, repos)
    logger.debug("%s: %s" % (project, project_repos))
    docker_tags = []
    for image in project_repos:
        res = {"name": image}
        tags = docker.get_docker_tags(image)
        if tag:
            logger.degug("non filtered tags: %s" % tags)
            tags = filter(re.compile(tag).match, tags)
        res["tags"] = tags
        docker_tags.append(res)
    logger.debug("docker_tags: %s" % docker_tags)
    return docker_tags


def _build_docker_logic(form, projects):
    result = _hash_versions(form.cleaned_data, projects)
    context = {"projects": []}
    for pro in projects:
        try:
            logger.debug(
                "trying to trigger docker image at branch %s for project %s",
                result[pro],
                pro,
            )
            url = docker.trigger_docker_build(pro, result[pro])
            context["projects"].append({"name": pro, "url": url})
        except KeyError:
            msg = "Houston, we have a problem with trigger for %s"
            logger.error(msg, pro)
            context["projects"].append({"name": pro, "url": None})
    return context


@login_required
def build_docker_images(request):
    if request.method == "POST":
        form = BuildDockerForm(request.POST)
        if form.is_valid():
            context = _build_docker_logic(
                form, settings.RELEASE_DASHBOARD_DOCKER_PROJECTS
            )
        else:
            context = {"error": "form validation error"}
        return render(request, "release_dashboard/build_result.html", context)
    else:
        context = {
            "projects": _projects_versions(
                settings.RELEASE_DASHBOARD_DOCKER_PROJECTS,
                regex_mr,
                False,
                True,
                True,
            ),
            "common_versions": {"tags": [], "branches": ["master"]},
            "docker": True,
        }
        _common_versions(context, False, True)
        return render(request, "release_dashboard/build_docker.html", context)


@login_required
def refresh_all(request):
    if request.method == "POST":
        res = tasks.docker_fetch_all.delay()
        return JsonResponse({"url": "/flower/task/%s" % res.id}, status=201)
    else:
        template = "release_dashboard/refresh_docker.html"
        projects = []
        for project in settings.RELEASE_DASHBOARD_DOCKER_PROJECTS:
            info = {"name": project, "tags": None}
            projects.append(info)
        return render(request, template, {"projects": projects})


@login_required
@require_http_methods(["POST"])
def refresh(request, project):
    res = tasks.docker_fetch_project.delay(project)
    return JsonResponse({"url": "/flower/task/%s" % res.id}, status=201)


@login_required
@require_http_methods(["GET"])
def docker_images(request):
    images = DockerImage.objects.images_with_tags
    context = {
        "images": images,
        "URL_BASE": settings.DOCKER_REGISTRY_URL.format(""),
    }
    return render(request, "release_dashboard/docker_images.html", context)


@login_required
@require_http_methods(["GET"])
def docker_project_images(request, project):
    try:
        Project.objects.get(name=project)
    except Project.DoesNotExist:
        raise Http404("Project does not exist")
    images = DockerImage.objects.images_with_tags(project)
    context = {
        "images": images,
        "URL_BASE": settings.DOCKER_REGISTRY_URL.format(""),
    }
    return render(request, "release_dashboard/docker_images.html", context)


@login_required
@require_http_methods(["GET"])
def docker_image_tags(request, project, image):
    try:
        proj = Project.objects.get(name=project)
        image = DockerImage.objects.get(name=image, project=proj)
    except Project.DoesNotExist:
        raise Http404("Project does not exist")
    except DockerImage.DoesNotExist:
        raise Http404("Project does not exist")
    context = {
        "images": [image],
        "URL_BASE": settings.DOCKER_REGISTRY_URL.format(""),
    }
    return render(request, "release_dashboard/docker_image.html", context)


class DockerImageList(generics.ListAPIView):
    queryset = DockerImage.objects.all()
    serializer_class = serializers.DockerImageSerializer


class DockerImageDetail(generics.RetrieveDestroyAPIView):
    queryset = DockerImage.objects.all()
    serializer_class = serializers.DockerImageSerializer


class DockerTagList(generics.ListAPIView):
    queryset = DockerTag.objects.all()
    serializer_class = serializers.DockerTagSerializer


class DockerTagDetail(generics.RetrieveDestroyAPIView):
    queryset = DockerTag.objects.all()
    serializer_class = serializers.DockerTagSerializer

    def destroy(self, request, *args, **kwargs):
        instance = self.get_object()
        tasks.docker_remove_tag.delay(instance.image.name, instance.name)
        return Response(status=status.HTTP_202_ACCEPTED)