"""Unit tests for devx.tools.check_api_identity_checks."""

from __future__ import annotations

from pathlib import Path
from unittest.mock import patch

from click.testing import CliRunner

from devx.tools.check_api_identity_checks import (
    DEFAULT_NOQA_MARKER,
    DEFAULT_SCAN_DIRS,
    DEFAULT_SKIP_PATTERNS,
    _load_config,
    _matches_skip_pattern,
    cli,
    find_identity_checks,
)


class TestFindIdentityChecks:
    def test_detects_is_true(self, tmp_path: Path) -> None:
        f = tmp_path / "test_foo.py"
        f.write_text("assert config.get('x') is True\n")
        issues = find_identity_checks(f, tmp_path, DEFAULT_NOQA_MARKER)
        assert len(issues) == 1
        assert "is True" in issues[0]

    def test_detects_is_false(self, tmp_path: Path) -> None:
        f = tmp_path / "test_foo.py"
        f.write_text("if config.get('x') is False:\n    pass\n")
        issues = find_identity_checks(f, tmp_path, DEFAULT_NOQA_MARKER)
        assert len(issues) == 1
        assert "is False" in issues[0]

    def test_detects_is_not_true(self, tmp_path: Path) -> None:
        f = tmp_path / "test_foo.py"
        f.write_text("if config.get('x') is not True:\n    fail()\n")
        issues = find_identity_checks(f, tmp_path, DEFAULT_NOQA_MARKER)
        assert len(issues) == 1
        assert "is not True" in issues[0]

    def test_detects_is_not_false(self, tmp_path: Path) -> None:
        f = tmp_path / "test_foo.py"
        f.write_text("if config.get('x') is not False:\n    fail()\n")
        issues = find_identity_checks(f, tmp_path, DEFAULT_NOQA_MARKER)
        assert len(issues) == 1
        assert "is not False" in issues[0]

    def test_noqa_suppresses(self, tmp_path: Path) -> None:
        f = tmp_path / "test_foo.py"
        f.write_text("assert config.get('x') is True  # noqa\n")
        issues = find_identity_checks(f, tmp_path, DEFAULT_NOQA_MARKER)
        assert len(issues) == 0

    def test_no_false_positives(self, tmp_path: Path) -> None:
        f = tmp_path / "test_foo.py"
        f.write_text("assert config.get('x') == 'true'\nassert config.get('y') == True\nx = True\nif x:\n    pass\n")
        issues = find_identity_checks(f, tmp_path, DEFAULT_NOQA_MARKER)
        assert len(issues) == 0

    def test_multiple_issues(self, tmp_path: Path) -> None:
        f = tmp_path / "test_foo.py"
        f.write_text("if config.get('a') is True:\n    pass\nif config.get('b') is not False:\n    pass\n")
        issues = find_identity_checks(f, tmp_path, DEFAULT_NOQA_MARKER)
        assert len(issues) == 2

    def test_file_not_found(self, tmp_path: Path) -> None:
        f = tmp_path / "nonexistent.py"
        issues = find_identity_checks(f, tmp_path, DEFAULT_NOQA_MARKER)
        assert issues == []


class TestMatchesSkipPattern:
    def test_matches_helpers(self) -> None:
        assert _matches_skip_pattern(Path("test_mattermost_helpers.py"), DEFAULT_SKIP_PATTERNS)

    def test_does_not_match_regular(self) -> None:
        assert not _matches_skip_pattern(Path("test_mattermost.py"), DEFAULT_SKIP_PATTERNS)

    def test_empty_patterns(self) -> None:
        assert not _matches_skip_pattern(Path("test_anything.py"), [])


class TestLoadConfig:
    def test_defaults(self) -> None:
        with patch("devx.tools.check_api_identity_checks._load_pyproject_devx") as mock:
            mock.return_value = {}
            scan_dirs, skip_patterns, noqa = _load_config()
            assert scan_dirs == DEFAULT_SCAN_DIRS
            assert skip_patterns == DEFAULT_SKIP_PATTERNS
            assert noqa == DEFAULT_NOQA_MARKER

    def test_custom_config(self) -> None:
        with patch("devx.tools.check_api_identity_checks._load_pyproject_devx") as mock:
            mock.return_value = {
                "check_api_identity_checks": {
                    "scan_dirs": ["tests/api"],
                    "skip_patterns": ["test_*_unit.py"],
                    "noqa_marker": "# allow",
                }
            }
            scan_dirs, skip_patterns, noqa = _load_config()
            assert scan_dirs == ["tests/api"]
            assert skip_patterns == ["test_*_unit.py"]
            assert noqa == "# allow"

    def test_invalid_config_returns_defaults(self) -> None:
        with patch("devx.tools.check_api_identity_checks._load_pyproject_devx") as mock:
            mock.return_value = {"check_api_identity_checks": "not a dict"}
            scan_dirs, _, _ = _load_config()
            assert scan_dirs == DEFAULT_SCAN_DIRS


class TestCli:
    def test_no_issues(self, tmp_path: Path) -> None:
        runner = CliRunner()
        with (
            patch("devx.tools.check_api_identity_checks._load_config") as mock_cfg,
            patch("devx.tools.check_api_identity_checks.Path.cwd", return_value=tmp_path),
        ):
            mock_cfg.return_value = (["tests/integration"], DEFAULT_SKIP_PATTERNS, DEFAULT_NOQA_MARKER)
            (tmp_path / "tests" / "integration").mkdir(parents=True)
            (tmp_path / "tests" / "integration" / "test_foo.py").write_text("assert config.get('x') == 'true'\n")
            result = runner.invoke(cli, [])
            assert result.exit_code == 0
            assert "Passed" in result.output

    def test_with_issues(self, tmp_path: Path) -> None:
        runner = CliRunner()
        with (
            patch("devx.tools.check_api_identity_checks._load_config") as mock_cfg,
            patch("devx.tools.check_api_identity_checks.Path.cwd", return_value=tmp_path),
        ):
            mock_cfg.return_value = (["tests/integration"], DEFAULT_SKIP_PATTERNS, DEFAULT_NOQA_MARKER)
            (tmp_path / "tests" / "integration").mkdir(parents=True)
            (tmp_path / "tests" / "integration" / "test_foo.py").write_text(
                "if config.get('x') is not True:\n    fail()\n"
            )
            result = runner.invoke(cli, [])
            assert result.exit_code != 0
            assert "is not True" in result.output

    def test_skips_helpers(self, tmp_path: Path) -> None:
        runner = CliRunner()
        with (
            patch("devx.tools.check_api_identity_checks._load_config") as mock_cfg,
            patch("devx.tools.check_api_identity_checks.Path.cwd", return_value=tmp_path),
        ):
            mock_cfg.return_value = (["tests/integration"], DEFAULT_SKIP_PATTERNS, DEFAULT_NOQA_MARKER)
            (tmp_path / "tests" / "integration").mkdir(parents=True)
            (tmp_path / "tests" / "integration" / "test_foo_helpers.py").write_text("assert x is True\n")
            result = runner.invoke(cli, [])
            assert result.exit_code == 0

    def test_nonexistent_dir(self, tmp_path: Path) -> None:
        runner = CliRunner()
        with (
            patch("devx.tools.check_api_identity_checks._load_config") as mock_cfg,
            patch("devx.tools.check_api_identity_checks.Path.cwd", return_value=tmp_path),
        ):
            mock_cfg.return_value = (["nonexistent"], DEFAULT_SKIP_PATTERNS, DEFAULT_NOQA_MARKER)
            result = runner.invoke(cli, [])
            assert result.exit_code == 0

    def test_custom_scan_dir(self, tmp_path: Path) -> None:
        runner = CliRunner()
        with (
            patch("devx.tools.check_api_identity_checks._load_config") as mock_cfg,
            patch("devx.tools.check_api_identity_checks.Path.cwd", return_value=tmp_path),
        ):
            mock_cfg.return_value = (["other"], DEFAULT_SKIP_PATTERNS, DEFAULT_NOQA_MARKER)
            (tmp_path / "custom").mkdir()
            (tmp_path / "custom" / "test_foo.py").write_text("if x is True:\n    pass\n")
            result = runner.invoke(cli, ["--scan-dir", "custom"])
            assert result.exit_code != 0