# Copyright (C) 2018-2021  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

from hypothesis import given

from swh.model.hashutil import hash_to_hex
from swh.model.model import Snapshot
from swh.web.api.utils import enrich_snapshot
from swh.web.common.utils import reverse
from swh.web.tests.data import random_sha1
from swh.web.tests.strategies import new_snapshot
from swh.web.tests.utils import check_api_get_responses, check_http_get_response


def test_api_snapshot(api_client, archive_data, snapshot):

    url = reverse("api-1-snapshot", url_args={"snapshot_id": snapshot})
    rv = check_api_get_responses(api_client, url, status_code=200)
    expected_data = {**archive_data.snapshot_get(snapshot), "next_branch": None}
    expected_data = enrich_snapshot(expected_data, rv.wsgi_request)
    assert rv.data == expected_data


def test_api_snapshot_paginated(api_client, archive_data, snapshot):

    branches_offset = 0
    branches_count = 2

    snapshot_branches = []

    for k, v in sorted(archive_data.snapshot_get(snapshot)["branches"].items()):
        snapshot_branches.append(
            {"name": k, "target_type": v["target_type"], "target": v["target"]}
        )

    whole_snapshot = {"id": snapshot, "branches": {}, "next_branch": None}

    while branches_offset < len(snapshot_branches):
        branches_from = snapshot_branches[branches_offset]["name"]
        url = reverse(
            "api-1-snapshot",
            url_args={"snapshot_id": snapshot},
            query_params={
                "branches_from": branches_from,
                "branches_count": branches_count,
            },
        )
        rv = check_api_get_responses(api_client, url, status_code=200)
        expected_data = archive_data.snapshot_get_branches(
            snapshot, branches_from, branches_count
        )

        expected_data = enrich_snapshot(expected_data, rv.wsgi_request)

        branches_offset += branches_count
        if branches_offset < len(snapshot_branches):
            next_branch = snapshot_branches[branches_offset]["name"]
            expected_data["next_branch"] = next_branch
        else:
            expected_data["next_branch"] = None

        assert rv.data == expected_data
        whole_snapshot["branches"].update(expected_data["branches"])

        if branches_offset < len(snapshot_branches):
            next_url = rv.wsgi_request.build_absolute_uri(
                reverse(
                    "api-1-snapshot",
                    url_args={"snapshot_id": snapshot},
                    query_params={
                        "branches_from": next_branch,
                        "branches_count": branches_count,
                    },
                )
            )
            assert rv["Link"] == '<%s>; rel="next"' % next_url
        else:
            assert not rv.has_header("Link")

    url = reverse("api-1-snapshot", url_args={"snapshot_id": snapshot})
    rv = check_api_get_responses(api_client, url, status_code=200)
    assert rv.data == whole_snapshot


def test_api_snapshot_filtered(api_client, archive_data, snapshot):

    snapshot_branches = []

    for k, v in sorted(archive_data.snapshot_get(snapshot)["branches"].items()):
        snapshot_branches.append(
            {"name": k, "target_type": v["target_type"], "target": v["target"]}
        )

    target_type = random.choice(snapshot_branches)["target_type"]

    url = reverse(
        "api-1-snapshot",
        url_args={"snapshot_id": snapshot},
        query_params={"target_types": target_type},
    )
    rv = check_api_get_responses(api_client, url, status_code=200)

    expected_data = archive_data.snapshot_get_branches(
        snapshot, target_types=target_type
    )
    expected_data = enrich_snapshot(expected_data, rv.wsgi_request)

    assert rv.data == expected_data


def test_api_snapshot_errors(api_client):
    unknown_snapshot_ = random_sha1()

    url = reverse("api-1-snapshot", url_args={"snapshot_id": "63ce369"})
    check_api_get_responses(api_client, url, status_code=400)

    url = reverse("api-1-snapshot", url_args={"snapshot_id": unknown_snapshot_})
    check_api_get_responses(api_client, url, status_code=404)


def test_api_snapshot_uppercase(api_client, snapshot):
    url = reverse(
        "api-1-snapshot-uppercase-checksum", url_args={"snapshot_id": snapshot.upper()}
    )

    resp = check_http_get_response(api_client, url, status_code=302)

    redirect_url = reverse(
        "api-1-snapshot-uppercase-checksum", url_args={"snapshot_id": snapshot}
    )

    assert resp["location"] == redirect_url


@given(new_snapshot(min_size=4))
def test_api_snapshot_null_branch(api_client, archive_data, new_snapshot):
    snp_dict = new_snapshot.to_dict()
    snp_id = hash_to_hex(snp_dict["id"])
    for branch in snp_dict["branches"].keys():
        snp_dict["branches"][branch] = None
        break
    archive_data.snapshot_add([Snapshot.from_dict(snp_dict)])
    url = reverse("api-1-snapshot", url_args={"snapshot_id": snp_id})
    check_api_get_responses(api_client, url, status_code=200)


def test_api_snapshot_no_pull_request_branches_filtering(
    api_client, archive_data, origin_with_pull_request_branches
):
    """Pull request branches should not be filtered out when querying
    a snapshot with the Web API."""
    snapshot = archive_data.snapshot_get_latest(origin_with_pull_request_branches.url)
    url = reverse("api-1-snapshot", url_args={"snapshot_id": snapshot["id"]})
    resp = check_api_get_responses(api_client, url, status_code=200)
    assert any([b.startswith("refs/pull/") for b in resp.data["branches"]])
