# Copyright (c) Advanced Micro Devices, Inc.
# SPDX-License-Identifier:  MIT

"""
Unit tests for rocprof-compute general CLI options.
"""

import argparse
from pathlib import Path
from unittest.mock import patch

import pytest
from common import SUPPORTED_ARCHS

from argparser import omniarg_parser

HOME = Path.cwd()
VERSION = {"ver_pretty": "rocprof-compute (unit test)"}


def build_args(argv, experimental=False):
    """Construct the argument parser."""
    parser = argparse.ArgumentParser(
        prog="tool", usage="rocprof-compute [mode] [options]"
    )
    omniarg_parser(parser, HOME, SUPPORTED_ARCHS, VERSION, experimental)
    return parser.parse_args(argv)


# =============================================================================
# -v / --version
# =============================================================================


@pytest.mark.parametrize("flag", ["-v", "--version"])
def test_version_success_exits_zero(flag, capsys):
    with pytest.raises(SystemExit) as exc:
        build_args([flag])
    assert exc.value.code == 0
    assert "unit test" in capsys.readouterr().out


# =============================================================================
# -h / --help
# =============================================================================


@pytest.mark.parametrize("flag", ["-h", "--help"])
def test_help_success_exits_zero(flag, capsys):
    with pytest.raises(SystemExit) as exc:
        build_args([flag])
    assert exc.value.code == 0
    assert "usage" in capsys.readouterr().out.lower()


@pytest.mark.parametrize("flag", ["-h", "--help"])
def test_help_rejects_explicit_value(flag, capsys):
    with pytest.raises(SystemExit) as exc:
        build_args([f"{flag}=now"])
    assert exc.value.code == 2
    assert "--help" in capsys.readouterr().err


# =============================================================================
# -V / --verbose
# =============================================================================


@pytest.mark.parametrize("flag", ["-V", "--verbose"])
def test_verbose_success_counts(flag):
    assert build_args([]).verbose == 0
    assert build_args([flag]).verbose == 1
    assert build_args([flag, flag, flag]).verbose == 3


@pytest.mark.parametrize("flag", ["-V", "--verbose"])
def test_verbose_rejects_explicit_value(flag, capsys):
    with pytest.raises(SystemExit) as exc:
        build_args([f"{flag}=2"])
    assert exc.value.code == 2
    assert "--verbose" in capsys.readouterr().err


# =============================================================================
# -q / --quiet
# =============================================================================


@pytest.mark.parametrize("flag", ["-q", "--quiet"])
def test_quiet_success_sets_flag(flag):
    assert build_args([]).quiet is False
    assert build_args([flag]).quiet is True


@pytest.mark.parametrize("flag", ["-q", "--quiet"])
def test_quiet_rejects_explicit_value(flag, capsys):
    with pytest.raises(SystemExit) as exc:
        build_args([f"{flag}=loud"])
    assert exc.value.code == 2
    assert "--quiet" in capsys.readouterr().err


# =============================================================================
# --config-dir
# =============================================================================


def test_config_dir_success_stores_value():
    assert build_args(["--config-dir", "/tmp/cfg"]).config_dir == "/tmp/cfg"


def test_config_dir_requires_value(capsys):
    with pytest.raises(SystemExit) as exc:
        build_args(["--config-dir"])
    assert exc.value.code == 2
    assert "--config-dir" in capsys.readouterr().err


def test_pc_sampling_analyze_options():
    """Defaults, overrides, and validation for the analyze PC sampling options."""
    defaults = build_args(["analyze"])
    assert defaults.pc_sampling_sorting_type == "count"
    assert defaults.pc_sampling_rows == 10

    overrides = build_args([
        "analyze",
        "--pc-sampling-sorting-type",
        "offset",
        "--pc-sampling-rows",
        "25",
    ])
    assert overrides.pc_sampling_sorting_type == "offset"
    assert overrides.pc_sampling_rows == 25

    # 0 is allowed and means "show all rows".
    assert build_args(["analyze", "--pc-sampling-rows", "0"]).pc_sampling_rows == 0

    # Negative row counts trigger an argparse error.
    with patch.object(
        argparse.ArgumentParser, "error", side_effect=SystemExit(2)
    ) as mock_error:
        with pytest.raises(SystemExit):
            build_args(["analyze", "--pc-sampling-rows", "-1"])
    mock_error.assert_called_once()