# Copyright (C) 2021 The Software Heritage developers
# See the AUTHORS file at the top-level directory of this distribution
# License: GNU Affero General Public License version 3, or any later version
# See top-level LICENSE file for more information

import random
import re
import string

from dateutil import parser
from hypothesis import given
import pytest

from django.utils.html import escape

from swh.model.hashutil import hash_to_bytes
from swh.model.model import OriginVisit, OriginVisitStatus, Snapshot
from swh.storage.utils import now
from swh.web.browse.snapshot_context import process_snapshot_branches
from swh.web.common.utils import reverse
from swh.web.tests.data import random_sha1
from swh.web.tests.django_asserts import assert_contains, assert_not_contains
from swh.web.tests.strategies import new_origin, visit_dates
from swh.web.tests.utils import check_html_get_response


@pytest.mark.parametrize(
    "browse_context,template_used",
    [
        ("log", "revision-log.html"),
        ("branches", "branches.html"),
        ("releases", "releases.html"),
    ],
)
def test_snapshot_browse_with_id(client, browse_context, template_used, snapshot):
    url = reverse(
        f"browse-snapshot-{browse_context}", url_args={"snapshot_id": snapshot}
    )

    resp = check_html_get_response(
        client, url, status_code=200, template_used=f"browse/{template_used}"
    )
    assert_contains(resp, f"swh:1:snp:{snapshot}")


@pytest.mark.parametrize("browse_context", ["log", "branches", "releases"])
def test_snapshot_browse_with_id_and_origin(
    client, browse_context, archive_data, origin
):
    snapshot = archive_data.snapshot_get_latest(origin["url"])
    url = reverse(
        f"browse-snapshot-{browse_context}",
        url_args={"snapshot_id": snapshot["id"]},
        query_params={"origin_url": origin["url"]},
    )

    resp = check_html_get_response(
        client, url, status_code=200, template_used="includes/snapshot-context.html"
    )
    assert_contains(resp, origin["url"])


@pytest.mark.parametrize("browse_context", ["log", "branches", "releases"])
def test_snapshot_browse_with_id_origin_and_timestamp(
    client, browse_context, archive_data, origin_with_multiple_visits
):
    visit = archive_data.origin_visit_get(origin_with_multiple_visits["url"])[0]
    url = reverse(
        f"browse-snapshot-{browse_context}",
        url_args={"snapshot_id": visit["snapshot"]},
        query_params={"origin_url": visit["origin"], "timestamp": visit["date"]},
    )
    resp = check_html_get_response(
        client, url, status_code=200, template_used="includes/snapshot-context.html"
    )
    requested_time = parser.parse(visit["date"]).strftime("%d %B %Y, %H:%M")
    assert_contains(resp, requested_time)
    assert_contains(resp, visit["origin"])


@pytest.mark.parametrize("browse_context", ["log", "branches", "releases"])
def test_snapshot_browse_without_id(client, browse_context, archive_data, origin):
    url = reverse(
        f"browse-snapshot-{browse_context}", query_params={"origin_url": origin["url"]}
    )
    # This will be redirected to /snapshot/<latest_snapshot_id>/log
    resp = check_html_get_response(client, url, status_code=302,)
    snapshot = archive_data.snapshot_get_latest(origin["url"])

    assert resp.url == reverse(
        f"browse-snapshot-{browse_context}",
        url_args={"snapshot_id": snapshot["id"]},
        query_params={"origin_url": origin["url"]},
    )


@pytest.mark.parametrize("browse_context", ["log", "branches", "releases"])
def test_snapshot_browse_without_id_and_origin(client, browse_context):
    url = reverse(f"browse-snapshot-{browse_context}")
    resp = check_html_get_response(client, url, status_code=400,)
    # assert_contains works only with a success response, using re.search instead
    assert re.search(
        "An origin URL must be provided as a query parameter",
        resp.content.decode("utf-8"),
    )


def test_snapshot_browse_branches(client, archive_data, origin):
    snapshot = archive_data.snapshot_get_latest(origin["url"])

    snapshot_sizes = archive_data.snapshot_count_branches(snapshot["id"])
    snapshot_content = process_snapshot_branches(snapshot)

    _origin_branches_test_helper(
        client, origin, snapshot_content, snapshot_sizes, snapshot_id=snapshot["id"]
    )


def _origin_branches_test_helper(
    client, origin_info, origin_snapshot, snapshot_sizes, snapshot_id
):
    query_params = {"origin_url": origin_info["url"], "snapshot": snapshot_id}

    url = reverse(
        "browse-snapshot-branches",
        url_args={"snapshot_id": snapshot_id},
        query_params=query_params,
    )

    resp = check_html_get_response(
        client, url, status_code=200, template_used="browse/branches.html"
    )

    origin_branches = origin_snapshot[0]
    origin_releases = origin_snapshot[1]
    origin_branches_url = reverse("browse-origin-branches", query_params=query_params)

    assert_contains(resp, f'href="{escape(origin_branches_url)}"')
    assert_contains(resp, f"Branches ({snapshot_sizes['revision']})")

    origin_releases_url = reverse("browse-origin-releases", query_params=query_params)

    nb_releases = len(origin_releases)
    if nb_releases > 0:
        assert_contains(resp, f'href="{escape(origin_releases_url)}">')
        assert_contains(resp, f"Releases ({snapshot_sizes['release']})")

    assert_contains(resp, '<tr class="swh-branch-entry', count=len(origin_branches))

    for branch in origin_branches:
        browse_branch_url = reverse(
            "browse-origin-directory",
            query_params={"branch": branch["name"], **query_params},
        )
        assert_contains(resp, '<a href="%s">' % escape(browse_branch_url))

        browse_revision_url = reverse(
            "browse-revision",
            url_args={"sha1_git": branch["revision"]},
            query_params=query_params,
        )
        assert_contains(resp, '<a href="%s">' % escape(browse_revision_url))

    _check_origin_link(resp, origin_info["url"])


def _check_origin_link(resp, origin_url):
    browse_origin_url = reverse(
        "browse-origin", query_params={"origin_url": origin_url}
    )
    assert_contains(resp, f'href="{browse_origin_url}"')


@given(
    new_origin(), visit_dates(),
)
def test_snapshot_branches_pagination_with_alias(
    client, archive_data, mocker, release, revisions_list, new_origin, visit_dates,
):
    """
    When a snapshot contains a branch or a release alias, pagination links
    in the branches / releases view should be displayed.
    """
    revisions = revisions_list(size=10)
    mocker.patch("swh.web.browse.snapshot_context.PER_PAGE", len(revisions) / 2)
    snp_dict = {"branches": {}, "id": hash_to_bytes(random_sha1())}
    for i in range(len(revisions)):
        branch = "".join(random.choices(string.ascii_lowercase, k=8))
        snp_dict["branches"][branch.encode()] = {
            "target_type": "revision",
            "target": hash_to_bytes(revisions[i]),
        }
    release_name = "".join(random.choices(string.ascii_lowercase, k=8))
    snp_dict["branches"][b"RELEASE_ALIAS"] = {
        "target_type": "alias",
        "target": release_name.encode(),
    }
    snp_dict["branches"][release_name.encode()] = {
        "target_type": "release",
        "target": hash_to_bytes(release),
    }
    archive_data.origin_add([new_origin])
    archive_data.snapshot_add([Snapshot.from_dict(snp_dict)])
    visit = archive_data.origin_visit_add(
        [OriginVisit(origin=new_origin.url, date=visit_dates[0], type="git",)]
    )[0]
    visit_status = OriginVisitStatus(
        origin=new_origin.url,
        visit=visit.visit,
        date=now(),
        status="full",
        snapshot=snp_dict["id"],
    )
    archive_data.origin_visit_status_add([visit_status])
    snapshot = archive_data.snapshot_get_latest(new_origin.url)
    url = reverse(
        "browse-snapshot-branches",
        url_args={"snapshot_id": snapshot["id"]},
        query_params={"origin_url": new_origin.url},
    )

    resp = check_html_get_response(
        client, url, status_code=200, template_used="browse/branches.html"
    )
    assert_contains(resp, '<ul class="pagination')


def test_pull_request_branches_filtering(
    client, origin_with_pull_request_branches, archive_data
):
    origin_url = origin_with_pull_request_branches.url
    # check no pull request branches are displayed in the Branches / Releases dropdown
    url = reverse("browse-origin-directory", query_params={"origin_url": origin_url})
    resp = check_html_get_response(
        client, url, status_code=200, template_used="browse/directory.html"
    )
    assert_not_contains(resp, "refs/pull/")

    snapshot = archive_data.snapshot_get_latest(origin_url)
    # check no pull request branches are displayed in the branches view
    url = reverse(
        "browse-snapshot-branches",
        url_args={"snapshot_id": snapshot["id"]},
        query_params={"origin_url": origin_url},
    )
    resp = check_html_get_response(
        client, url, status_code=200, template_used="browse/branches.html"
    )
    assert_not_contains(resp, "refs/pull/")


def test_snapshot_browse_releases(client, archive_data, origin):
    origin_visits = archive_data.origin_visit_get(origin["url"])

    visit = origin_visits[-1]
    snapshot = archive_data.snapshot_get(visit["snapshot"])
    snapshot_sizes = archive_data.snapshot_count_branches(snapshot["id"])
    snapshot_content = process_snapshot_branches(snapshot)

    _origin_releases_test_helper(
        client, origin, snapshot_content, snapshot_sizes, snapshot_id=visit["snapshot"]
    )


def _origin_releases_test_helper(
    client, origin_info, origin_snapshot, snapshot_sizes, snapshot_id=None
):
    query_params = {"origin_url": origin_info["url"], "snapshot": snapshot_id}

    url = reverse(
        "browse-snapshot-releases",
        url_args={"snapshot_id": snapshot_id},
        query_params=query_params,
    )

    resp = check_html_get_response(
        client, url, status_code=200, template_used="browse/releases.html"
    )

    origin_releases = origin_snapshot[1]

    origin_branches_url = reverse("browse-origin-branches", query_params=query_params)

    assert_contains(resp, f'href="{escape(origin_branches_url)}"')
    assert_contains(resp, f"Branches ({snapshot_sizes['revision']})")

    origin_releases_url = reverse("browse-origin-releases", query_params=query_params)

    nb_releases = len(origin_releases)
    if nb_releases > 0:
        assert_contains(resp, f'href="{escape(origin_releases_url)}"')
        assert_contains(resp, f"Releases ({snapshot_sizes['release']}")

    assert_contains(resp, '<tr class="swh-release-entry', count=nb_releases)
    assert_contains(resp, 'title="The release', count=nb_releases)

    for release in origin_releases:
        browse_release_url = reverse(
            "browse-release",
            url_args={"sha1_git": release["id"]},
            query_params=query_params,
        )
        browse_revision_url = reverse(
            "browse-revision",
            url_args={"sha1_git": release["target"]},
            query_params=query_params,
        )

        assert_contains(resp, '<a href="%s">' % escape(browse_release_url))
        assert_contains(resp, '<a href="%s">' % escape(browse_revision_url))

    _check_origin_link(resp, origin_info["url"])


def test_snapshot_content_redirect(client, snapshot):
    qry = {"extra-arg": "extra"}
    url = reverse(
        "browse-snapshot-content", url_args={"snapshot_id": snapshot}, query_params=qry
    )
    resp = check_html_get_response(client, url, status_code=301)
    assert resp.url == reverse(
        "browse-content", query_params={**{"snapshot_id": snapshot}, **qry}
    )


def test_snapshot_content_legacy_redirect(client, snapshot):
    qry = {"extra-arg": "extra"}
    url_args = {"snapshot_id": snapshot, "path": "test.txt"}
    url = reverse("browse-snapshot-content-legacy", url_args=url_args, query_params=qry)
    resp = check_html_get_response(client, url, status_code=301)
    assert resp.url == reverse("browse-content", query_params={**url_args, **qry})
