import pytest
import atexit
import utils


@pytest.fixture(scope='session')
def local_salt_client():
    return utils.init_salt_client()

nodes = utils.calculate_groups()


@pytest.fixture(scope='session', params=nodes.values(), ids=nodes.keys())
def nodes_in_group(request):
    return request.param


@pytest.fixture(scope='session')
def check_prometheus(local_salt_client):
    salt_output = local_salt_client.cmd(
        'prometheus:server',
        'test.ping',
        expr_form='pillar')
    if not salt_output:
        pytest.skip("Prometheus service or prometheus:server pillar \
          are not found on this environment.")


@pytest.fixture(scope='session')
def check_alerta(local_salt_client):
    salt_output = local_salt_client.cmd(
        'prometheus:alerta',
        'test.ping',
        expr_form='pillar')
    if not salt_output:
        pytest.skip("Alerta service or prometheus:alerta pillar \
              are not found on this environment.")


@pytest.fixture(scope='session')
def check_kibana(local_salt_client):
    salt_output = local_salt_client.cmd(
        'kibana:server',
        'test.ping',
        expr_form='pillar')
    if not salt_output:
        pytest.skip("Kibana service or kibana:server pillar \
          are not found on this environment.")


@pytest.fixture(scope='session')
def check_grafana(local_salt_client):
    salt_output = local_salt_client.cmd(
        'grafana:client',
        'test.ping',
        expr_form='pillar')
    if not salt_output:
        pytest.skip("Grafana service or grafana:client pillar \
          are not found on this environment.")


def pytest_namespace():
    return {'contrail': None}


@pytest.fixture(scope='module')
def contrail(local_salt_client):
    probe = local_salt_client.cmd(
        'opencontrail:control',
        'pillar.get',
        'opencontrail:control:version',
        expr_form='pillar')
    if not probe:
        pytest.skip("Contrail is not found on this environment")
    versions = set(probe.values())
    if len(versions) != 1:
        pytest.fail('Contrail versions are not the same: {}'.format(probe))
    pytest.contrail = str(versions.pop())[:1]


@pytest.fixture(autouse=True, scope='session')
def print_node_version(local_salt_client):
    """
        Gets info about each node using salt command, info is represented as a dictionary with :
        {node_name1: output1, node_name2: ...}

        :print to output the table with results after completing all tests if nodes and salt output exist.
                Prints nothing otherwise
        :return None
    """
    try:
        filename_with_versions = "/etc/image_version"
        cat_image_version_file = "if [ -f '{name}' ]; then \
                                        cat {name}; \
                                    else \
                                        echo BUILD_TIMESTAMP='no {name}'; \
                                        echo BUILD_TIMESTAMP_RFC='no {name}'; \
                                    fi ".format(name=filename_with_versions)

        list_version = local_salt_client.cmd(
            '*',
            'cmd.run',
            'echo "NODE_INFO=$(uname -sr)" && ' + cat_image_version_file,
            expr_form='compound')
        if list_version.__len__() == 0:
            yield
        parsed = {k: v.split('\n') for k, v in list_version.items()}
        columns = [name.split('=')[0] for name in parsed.values()[0]]

        template = "{:<40} | {:<25} | {:<25} | {:<25}\n"

        report_text = template.format("NODE", *columns)
        for node, data in sorted(parsed.items()):
            report_text += template.format(node, *[item.split("=")[1] for item in data])

        def write_report():
            print(report_text)
        atexit.register(write_report)
        yield
    except Exception as e:
        print("print_node_version:: some error occurred: {}".format(e))
        yield