"""Unit tests for devx.tools.setup_ssh_key."""

from __future__ import annotations

import os
from unittest.mock import MagicMock, patch

from click.testing import CliRunner

from devx.tools.setup_ssh_key import cli, setup_ssh_key


class TestSetupSshKey:
    def test_success(self, tmp_path, monkeypatch) -> None:
        monkeypatch.setenv("HOME", str(tmp_path))
        monkeypatch.setenv("SSH_PRIVATE_KEY", "-----BEGIN KEY-----\nfake\n-----END KEY-----")
        with (
            patch("subprocess.run") as mock_run,
            patch("pathlib.Path.chmod"),
        ):
            agent_result = MagicMock()
            agent_result.returncode = 0
            agent_result.stdout = "SSH_AUTH_SOCK=/tmp/agent.sock;\nSSH_AGENT_PID=12345;\n"
            agent_result.stderr = ""
            add_result = MagicMock()
            add_result.returncode = 0
            add_result.stdout = ""
            add_result.stderr = ""
            mock_run.side_effect = [agent_result, add_result]
            assert setup_ssh_key() is True
            assert mock_run.call_count == 2

    def test_missing_key(self, monkeypatch) -> None:
        monkeypatch.delenv("SSH_PRIVATE_KEY", raising=False)
        assert setup_ssh_key() is False

    def test_empty_key(self, monkeypatch) -> None:
        monkeypatch.setenv("SSH_PRIVATE_KEY", "")
        assert setup_ssh_key() is False

    def test_explicit_key_param(self, tmp_path, monkeypatch) -> None:
        monkeypatch.setenv("HOME", str(tmp_path))
        monkeypatch.delenv("SSH_PRIVATE_KEY", raising=False)
        with (
            patch("subprocess.run") as mock_run,
            patch("pathlib.Path.chmod"),
        ):
            agent_result = MagicMock()
            agent_result.returncode = 0
            agent_result.stdout = "SSH_AUTH_SOCK=/tmp/agent.sock;\n"
            agent_result.stderr = ""
            add_result = MagicMock()
            add_result.returncode = 0
            add_result.stdout = ""
            add_result.stderr = ""
            mock_run.side_effect = [agent_result, add_result]
            assert setup_ssh_key("-----BEGIN KEY-----\nfake\n-----END KEY-----") is True

    def test_ssh_agent_failure(self, tmp_path, monkeypatch) -> None:
        monkeypatch.setenv("HOME", str(tmp_path))
        monkeypatch.setenv("SSH_PRIVATE_KEY", "fake-key")
        with (
            patch("subprocess.run") as mock_run,
            patch("pathlib.Path.chmod"),
        ):
            agent_result = MagicMock()
            agent_result.returncode = 1
            agent_result.stdout = ""
            agent_result.stderr = "ssh-agent failed"
            mock_run.return_value = agent_result
            assert setup_ssh_key() is False

    def test_key_file_written(self, tmp_path, monkeypatch) -> None:
        monkeypatch.setenv("HOME", str(tmp_path))
        monkeypatch.setenv("SSH_PRIVATE_KEY", "my-secret-key")
        with (
            patch("subprocess.run") as mock_run,
            patch("pathlib.Path.chmod") as mock_chmod,
        ):
            agent_result = MagicMock()
            agent_result.returncode = 0
            agent_result.stdout = "SSH_AUTH_SOCK=/tmp/agent.sock;\n"
            agent_result.stderr = ""
            add_result = MagicMock()
            add_result.returncode = 0
            add_result.stdout = ""
            add_result.stderr = ""
            mock_run.side_effect = [agent_result, add_result]
            setup_ssh_key()
            key_file = tmp_path / ".ssh" / "id_rsa"
            assert key_file.exists()
            assert "my-secret-key" in key_file.read_text()
            mock_chmod.assert_called_with(0o600)

    def test_env_vars_set_from_agent(self, tmp_path, monkeypatch) -> None:
        monkeypatch.setenv("HOME", str(tmp_path))
        monkeypatch.setenv("SSH_PRIVATE_KEY", "fake-key")
        with (
            patch("subprocess.run") as mock_run,
            patch("pathlib.Path.chmod"),
        ):
            agent_result = MagicMock()
            agent_result.returncode = 0
            agent_result.stdout = "SSH_AUTH_SOCK=/tmp/agent.sock;\nSSH_AGENT_PID=999;\n"
            agent_result.stderr = ""
            add_result = MagicMock()
            add_result.returncode = 0
            add_result.stdout = ""
            add_result.stderr = ""
            mock_run.side_effect = [agent_result, add_result]
            setup_ssh_key()
            assert os.environ.get("SSH_AUTH_SOCK") == "/tmp/agent.sock"
            assert os.environ.get("SSH_AGENT_PID") == "999"

    def test_agent_output_without_env_vars(self, tmp_path, monkeypatch) -> None:
        monkeypatch.setenv("HOME", str(tmp_path))
        monkeypatch.setenv("SSH_PRIVATE_KEY", "fake-key")
        monkeypatch.delenv("SSH_AUTH_SOCK", raising=False)
        with (
            patch("subprocess.run") as mock_run,
            patch("pathlib.Path.chmod"),
        ):
            agent_result = MagicMock()
            agent_result.returncode = 0
            agent_result.stdout = "Agent started\nsome message without equals\n"
            agent_result.stderr = ""
            add_result = MagicMock()
            add_result.returncode = 0
            add_result.stdout = ""
            add_result.stderr = ""
            mock_run.side_effect = [agent_result, add_result]
            assert setup_ssh_key() is True
            assert os.environ.get("SSH_AUTH_SOCK") is None


class TestCli:
    def test_success(self, tmp_path, monkeypatch) -> None:
        monkeypatch.setenv("HOME", str(tmp_path))
        monkeypatch.setenv("SSH_PRIVATE_KEY", "fake-key")
        runner = CliRunner()
        with patch("devx.tools.setup_ssh_key.setup_ssh_key") as mock_setup:
            mock_setup.return_value = True
            result = runner.invoke(cli, [])
            assert result.exit_code == 0
            assert "successfully" in result.output

    def test_no_key(self, monkeypatch) -> None:
        monkeypatch.delenv("SSH_PRIVATE_KEY", raising=False)
        runner = CliRunner()
        with patch("devx.tools.setup_ssh_key.setup_ssh_key") as mock_setup:
            mock_setup.return_value = False
            result = runner.invoke(cli, [])
            assert result.exit_code == 1