############################################################################
# Copyright (C) SchedMD LLC.
############################################################################
import _pytest

# import inspect
import logging
import os

# import pwd
import pytest
import re

# import shutil
import sys

# from pathlib import Path

sys.path.append(sys.path[0] + "/lib")
import atf


# Add test description (docstring) as a junit property
def pytest_itemcollected(item):
    node = item.obj
    desc = node.__doc__.strip() if node.__doc__ else node.__name__
    if desc:
        item.user_properties.append(("description", desc))


def pytest_addoption(parser):
    config_group = parser.getgroup("config mode")
    config_group.addoption(
        "--auto-config",
        action="store_true",
        help="the slurm configuration will be altered as needed by the test",
    )
    config_group.addoption(
        "--local-config",
        action="store_false",
        dest="auto_config",
        help="the slurm configuration will not be altered",
    )
    parser.addoption(
        "--no-color",
        action="store_true",
        dest="no_color",
        help="the pytest logs won't include colors",
    )
    parser.addoption(
        "--allow-slurmdbd-modify",
        action="store_true",
        dest="allow_slurmdbd_modify",
        help="allow running in local-config even if require_accounting(modify=True)",
    )


def color_log_level(level: int, **color_kwargs):
    # Adapted from deprecated py.io TerminalWriter source
    # https://py.readthedocs.io/en/latest/_modules/py/_io/terminalwriter.html
    _esctable = dict(
        black=30,
        red=31,
        green=32,
        yellow=33,
        blue=34,
        purple=35,
        cyan=36,
        white=37,
        Black=40,
        Red=41,
        Green=42,
        Yellow=43,
        Blue=44,
        Purple=45,
        Cyan=46,
        White=47,
        bold=1,
        light=2,
        blink=5,
        invert=7,
    )

    for handler in logging.getLogger().handlers:
        if isinstance(handler, _pytest.logging.LogCaptureHandler):
            formatter = handler.formatter
            if match := formatter.LEVELNAME_FMT_REGEX.search(formatter._fmt):
                levelname_fmt = match.group()
                formatted_levelname = levelname_fmt % {
                    "levelname": logging.getLevelName(level)
                }

                esc = []
                for option in color_kwargs:
                    esc.append(_esctable[option])

                colorized_formatted_levelname = (
                    "".join(["\x1b[%sm" % cod for cod in esc])
                    + formatted_levelname
                    + "\x1b[0m"
                )

                formatter._level_to_fmt_mapping[level] = (
                    formatter.LEVELNAME_FMT_REGEX.sub(
                        colorized_formatted_levelname, formatter._fmt
                    )
                )


@pytest.fixture(scope="session", autouse=True)
def session_setup(request):
    # Set the auto-config and other properties from the options
    atf.properties["auto-config"] = request.config.getoption("--auto-config")
    atf.properties["allow-slurmdbd-modify"] = request.config.getoption(
        "--allow-slurmdbd-modify"
    )
    if not request.config.getoption("--no-color"):
        # Customize logging level colors
        color_log_level(logging.CRITICAL, red=True, bold=True)
        color_log_level(logging.ERROR, red=True)
        color_log_level(logging.WARNING, yellow=True)
        color_log_level(logging.INFO, green=True)
        color_log_level(logging.NOTE, cyan=True)
        color_log_level(logging.DEBUG, blue=True, bold=True)
        color_log_level(logging.TRACE, purple=True, bold=True)


def update_tmp_path_exec_permissions():
    """
    For pytest versions 6+  the tmp path it uses no longer has
    public exec permissions for dynamically created directories by default.

    This causes problems when trying to read temp files during tests as
    users other than atf (ie slurm).  The tests will fail with permission denied.

    To fix this we check and add the x bit to the public group on tmp
    directories so the files inside can be read. Adding just 'read' is
    not enough

    Bug 16568
    """

    user_name = atf.get_user_name()
    path = f"/tmp/pytest-of-{user_name}"

    if os.path.isdir(path):
        os.chmod(path, 0o777)
        for root, dirs, files in os.walk(path):
            for d in dirs:
                os.chmod(os.path.join(root, d), 0o777)


@pytest.fixture(scope="module", autouse=True)
def module_setup(request, tmp_path_factory):
    atf.properties["slurm-started"] = False
    atf.properties["slurmrestd-started"] = False
    atf.properties["influxdb-started"] = False
    atf.properties["configurations-modified"] = set()
    atf.properties["orig-environment"] = dict(os.environ)
    atf.properties["orig-pypath"] = list(sys.path)
    if "old-slurm-prefix" in atf.properties.keys():
        del atf.properties["old-slurm-prefix"]
    if "new-slurm-prefix" in atf.properties.keys():
        del atf.properties["new-slurm-prefix"]

    # Ensure that slurm-spool-dir, slurm-tmpfs and nodes are set.
    atf.properties["slurm-spool-dir"] = atf.get_config_parameter(
        "SlurmdSpoolDir", live=False, quiet=True
    )
    atf.properties["slurm-tmpfs"] = atf.get_config_parameter(
        "TmpFS", live=False, quiet=True
    )
    atf.properties["nodes"] = []

    # Creating a module level tmp_path mimicking what tmp_path does
    name = request.node.name
    name = re.sub(r"[\W]", "_", name)
    name = name[:30]
    atf.properties["test_name"] = name
    atf.module_tmp_path = tmp_path_factory.mktemp(name, numbered=True)
    update_tmp_path_exec_permissions()

    # Module-level fixtures should run from within the module_tmp_path
    os.chdir(atf.module_tmp_path)

    # Stop Slurm if using auto-config and Slurm is already running
    if atf.properties["auto-config"] and atf.is_slurmctld_running(quiet=True):
        logging.warning(
            "Auto-config requires Slurm to be initially stopped but Slurm was found running. Stopping Slurm"
        )
        atf.stop_slurm(quiet=True)

    if atf.properties["auto-config"]:
        # Cleanup StateSaveLocation for auto-config
        atf.properties["statesaveloc"] = atf.get_config_parameter(
            "StateSaveLocation", live=False, quiet=True
        )
        if os.path.exists(atf.properties["statesaveloc"]):
            if os.path.exists(atf.properties["statesaveloc"] + name):
                logging.warning(
                    f"Backup for StateSaveLocation already exists ({atf.properties['statesaveloc']+name}). Removing it."
                )
                atf.run_command(
                    f"rm -rf {atf.properties['statesaveloc']+name}",
                    user="root",
                    quiet=True,
                )
            atf.run_command(
                f"mv {atf.properties['statesaveloc']} {atf.properties['statesaveloc']+name}",
                user="root",
                quiet=True,
            )

        # Create the required node directories for node0
        node_name = "node0"
        spool_dir = atf.properties["slurm-spool-dir"].replace("%n", node_name)
        tmpfs_dir = atf.properties["slurm-tmpfs"].replace("%n", node_name)
        atf.properties["nodes"].append(node_name)
        atf.run_command(f"sudo mkdir -p {spool_dir}", fatal=True, quiet=True)
        atf.run_command(f"sudo mkdir -p {tmpfs_dir}", fatal=True, quiet=True)

    yield

    # Return to the folder from which pytest was executed
    os.chdir(request.config.invocation_dir)

    # Teardown
    module_teardown()


def module_teardown():
    failures = []

    if atf.properties["auto-config"]:
        if atf.properties["slurm-started"] is True:
            # Cancel all jobs
            if not atf.cancel_all_jobs(quiet=True):
                failures.append("Not all jobs were successfully cancelled")

            # Stop Slurm if we started it
            if not atf.stop_slurm(fatal=False, quiet=True):
                failures.append("Not all Slurm daemons were successfully stopped")

        # Restore the Slurm database
        atf.restore_accounting_database()

        # Restore StateSaveLocation for auto-config
        atf.run_command(
            f"rm -rf {atf.properties['statesaveloc']}", user="root", quiet=True
        )
        if os.path.exists(atf.properties["statesaveloc"] + atf.properties["test_name"]):
            atf.run_command(
                f"mv {atf.properties['statesaveloc']+atf.properties['test_name']} {atf.properties['statesaveloc']}",
                user="root",
                quiet=True,
            )

        # Remove Nodes directories:
        if "nodes" not in atf.properties:
            atf.properties["nodes"] = ["node0"]
        for node_name in atf.properties["nodes"]:
            spool_dir = atf.properties["slurm-spool-dir"].replace("%n", node_name)
            tmpfs_dir = atf.properties["slurm-tmpfs"].replace("%n", node_name)
            atf.run_command(f"sudo rm -rf {spool_dir}", quiet=True)
            atf.run_command(f"sudo rm -rf {tmpfs_dir}", quiet=True)

        # Restore upgrade setup
        if "old-slurm-prefix" in atf.properties.keys():
            logging.debug("Restoring upgrade setup...")
            if not os.path.exists(f"{atf.module_tmp_path}/upgrade-sbin"):
                pytest.fail(
                    f"Can't restore upgrade setup, {atf.module_tmp_path}/upgrade-sbin doesn't exists."
                )
            if not os.path.exists(f"{atf.module_tmp_path}/upgrade-bin"):
                pytest.fail(
                    f"Can't restore upgrade setup, {atf.module_tmp_path}/upgrade-bin doesn't exists."
                )
            atf.run_command(
                f"sudo rm -rf {atf.properties['slurm-sbin-dir']} {atf.properties['slurm-bin-dir']}",
                quiet=True,
                fatal=True,
            )
            atf.run_command(
                f"sudo mv {atf.module_tmp_path}/upgrade-sbin {atf.properties['slurm-sbin-dir']}",
                quiet=True,
                fatal=True,
            )
            atf.run_command(
                f"sudo mv {atf.module_tmp_path}/upgrade-bin {atf.properties['slurm-bin-dir']}",
                quiet=True,
                fatal=True,
            )

        # Restore any backed up configuration files
        for config in set(atf.properties["configurations-modified"]):
            atf.restore_config_file(config)

        # Clean influxdb
        if atf.properties["influxdb-started"]:
            atf.request_influxdb(f"DROP DATABASE {atf.properties['influxdb_db']}")
    else:
        atf.cancel_jobs(atf.properties["submitted-jobs"])

    # Restore the prior environment
    os.environ.clear()
    os.environ.update(atf.properties["orig-environment"])
    sys.path = atf.properties["orig-pypath"]

    if failures:
        pytest.fail(failures[0])


@pytest.fixture(scope="function", autouse=True)
def function_setup(request, monkeypatch, tmp_path):
    # Log function docstring (test description) if present
    if request.function.__doc__ is not None:
        logging.info(request.function.__doc__)

    # Start each test inside the tmp_path
    monkeypatch.chdir(tmp_path)


@pytest.fixture(scope="class", autouse=True)
def class_setup(request):
    # Log class docstring (test description) if present
    if request.cls.__doc__ is not None:
        logging.info(request.cls.__doc__)


def pytest_keyboard_interrupt(excinfo):
    """Called for keyboard interrupt"""
    module_teardown()


@pytest.fixture(scope="module")
def mpi_program(module_setup):
    """Create the MPI program from the mpi_program.c in scripts directory.
    Returns the bin path of the mpi_program."""

    # Check for MPI setup
    atf.require_mpi("pmix", "mpicc")

    # Use the external C source file
    src_path = atf.properties["testsuite_scripts_dir"] + "/mpi_program.c"
    bin_path = os.getcwd() + "/mpi_program"

    # Compile the MPI program
    atf.run_command(f"mpicc -o {bin_path} {src_path}", fatal=True)

    yield bin_path

    atf.run_command(f"rm -f {bin_path}", fatal=True)


@pytest.fixture(scope="module")
def use_memory_program(module_setup):
    """
    Returns the bin path of a program that allocates a certain amount of MB for some seconds.
    """

    atf.require_tool("python3")

    src_path = atf.properties["testsuite_scripts_dir"] + "/use_memory_program.py"
    bin_path = os.getcwd() + "/use_memory_program.py"

    # Ensure x permissions
    atf.run_command(f"cp {src_path} {bin_path}")
    atf.run_command(f"chmod a+x {bin_path}")

    yield bin_path

    atf.run_command(f"rm -f {bin_path}", fatal=True)


@pytest.fixture(scope="module")
def spank_fail_lib(module_setup):
    """
    Returns the bin path of the spank .so that will fail if configured.
    """

    # The plugin uses ESPANK_NODE_FAILURE, so it needs to compile against 25.05+
    atf.require_version((25, 5), "config.h")

    src_path = atf.properties["testsuite_scripts_dir"] + "/spank_fail_test.c"
    bin_path = os.getcwd() + "/spank_fail_test.so"

    atf.compile_against_libslurm(src_path, bin_path, full=True, shared=True)

    yield bin_path

    atf.run_command(f"rm -f {bin_path}", fatal=True)