"""Unit tests for devx.ci.fast_molecule."""

from pathlib import Path
from unittest.mock import MagicMock, patch

from click.testing import CliRunner

from devx.ci.fast_molecule import (
    build_molecule_commands,
    cli,
    get_molecule_scenarios,
)


class TestGetMoleculeScenarios:
    def test_finds_scenarios(self, tmp_path: Path) -> None:
        roles_dir = tmp_path / "ansible" / "roles" / "myrole" / "molecule"
        roles_dir.mkdir(parents=True)
        (roles_dir / "default").mkdir()
        (roles_dir / "default" / "molecule.yml").write_text("name: default")
        (roles_dir / "full").mkdir()
        (roles_dir / "full" / "molecule.yml").write_text("name: full")
        (roles_dir / "no_scenario").mkdir()  # No molecule.yml

        scenarios = get_molecule_scenarios("myrole", str(tmp_path / "ansible" / "roles"))
        assert sorted(scenarios) == ["default", "full"]

    def test_returns_empty_when_no_molecule_dir(self, tmp_path: Path) -> None:
        scenarios = get_molecule_scenarios("nonexistent", str(tmp_path / "ansible" / "roles"))
        assert scenarios == []


class TestBuildMoleculeCommands:
    def test_builds_commands_for_roles(self, tmp_path: Path) -> None:
        roles_dir = tmp_path / "ansible" / "roles"
        for role in ["role_a", "role_b"]:
            mol_dir = roles_dir / role / "molecule" / "default"
            mol_dir.mkdir(parents=True)
            (mol_dir / "molecule.yml").write_text("name: default")

        commands = build_molecule_commands({"role_a", "role_b"}, str(roles_dir))
        assert len(commands) == 2
        assert all("molecule test -s default" in c for c in commands)
        assert all("--destroy=never" in c for c in commands)
        assert all("ubuntu-2604" in c for c in commands)

    def test_empty_when_no_scenarios(self, tmp_path: Path) -> None:
        commands = build_molecule_commands({"nonexistent"}, str(tmp_path / "ansible" / "roles"))
        assert commands == []

    def test_empty_when_no_roles(self) -> None:
        assert build_molecule_commands(set()) == []


class TestCli:
    @patch("devx.ci.fast_molecule.get_changed_files")
    def test_no_changes(self, mock_get: MagicMock) -> None:
        mock_get.return_value = []
        runner = CliRunner()
        result = runner.invoke(cli, ["--base", "origin/master", "--head", "HEAD"])
        assert result.exit_code == 0
        assert "No files changed" in result.output

    @patch("devx.ci.fast_molecule.detect_changed_roles")
    @patch("devx.ci.fast_molecule.get_changed_files")
    def test_no_ansible_changes(self, mock_get: MagicMock, mock_detect: MagicMock) -> None:
        mock_get.return_value = ["src/main.py", "README.md"]
        mock_detect.return_value = set()
        runner = CliRunner()
        result = runner.invoke(cli, ["--base", "origin/master", "--head", "HEAD"])
        assert result.exit_code == 0
        assert "No Ansible roles changed" in result.output

    @patch("devx.ci.fast_molecule.detect_changed_roles")
    @patch("devx.ci.fast_molecule.get_changed_files")
    def test_detects_changed_roles(self, mock_get: MagicMock, mock_detect: MagicMock) -> None:
        mock_get.return_value = ["ansible/roles/sso_bridge/tasks/main.yml"]
        mock_detect.return_value = {"sso_bridge"}
        runner = CliRunner()
        result = runner.invoke(cli, ["--base", "origin/master", "--head", "HEAD"])
        assert result.exit_code == 0
        assert "sso_bridge" in result.output