import os
import subprocess
import sys
import unittest
from pathlib import Path


class CLIHelpIntegrationTest(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        from . import PROJECT_ROOT

        cls.project_root = str(PROJECT_ROOT)
        cls.cli_dir = str(PROJECT_ROOT / "cli")
        cls.main_py = str(PROJECT_ROOT / "cli" / "__main__.py")
        cls.python = sys.executable

    def _discover_command_dirs(self):
        """
        Discover commands as package directories under cli/ that contain __main__.py.

        Rules:
          - cli/<...>/__main__.py marks a command package
          - cli/__main__.py is the dispatcher, not a command
          - ignore __pycache__
        Returns:
          list[list[str]] command segments, e.g. ["deploy","container"]
        """
        commands = []
        for root, dirnames, filenames in os.walk(self.cli_dir):  # nocheck: project-walk
            dirnames[:] = [d for d in dirnames if d != "__pycache__"]

            if "__main__.py" not in filenames:
                continue

            rel_dir = os.path.relpath(root, self.cli_dir)
            if rel_dir == ".":
                continue

            commands.append(list(Path(rel_dir).parts))

        commands.sort(key="/".join)
        return commands

    def test_all_cli_commands_help(self):
        for segments in self._discover_command_dirs():
            with self.subTest(command=" ".join(segments)):
                cmd = [self.python, self.main_py, *segments, "--help"]
                result = subprocess.run(
                    cmd, capture_output=True, text=True, check=False
                )
                self.assertEqual(
                    result.returncode,
                    0,
                    msg=(
                        f"Command `{' '.join(cmd)}` failed\n"
                        f"stdout:\n{result.stdout}\n"
                        f"stderr:\n{result.stderr}"
                    ),
                )


if __name__ == "__main__":
    unittest.main()