from unittest.mock import patch

import pytest

from pr.__main__ import main


def test_main_version(capsys):
    with patch("sys.argv", ["pr", "--version"]):
        with pytest.raises(SystemExit):
            main()
        captured = capsys.readouterr()
        assert "PR Assistant" in captured.out


def test_main_create_config_success(capsys):
    with patch("pr.core.config_loader.create_default_config", return_value=True):
        with patch("sys.argv", ["pr", "--create-config"]):
            main()
        captured = capsys.readouterr()
        assert "Configuration file created" in captured.out


def test_main_create_config_fail(capsys):
    with patch("pr.core.config_loader.create_default_config", return_value=False):
        with patch("sys.argv", ["pr", "--create-config"]):
            main()
        captured = capsys.readouterr()
        assert "Error creating configuration file" in captured.err


def test_main_list_sessions_no_sessions(capsys):
    with patch("pr.core.session.SessionManager") as mock_sm:
        mock_instance = mock_sm.return_value
        mock_instance.list_sessions.return_value = []
        with patch("sys.argv", ["pr", "--list-sessions"]):
            main()
        captured = capsys.readouterr()
        assert "No saved sessions found" in captured.out


def test_main_list_sessions_with_sessions(capsys):
    sessions = [{"name": "test", "created_at": "2023-01-01", "message_count": 5}]
    with patch("pr.core.session.SessionManager") as mock_sm:
        mock_instance = mock_sm.return_value
        mock_instance.list_sessions.return_value = sessions
        with patch("sys.argv", ["pr", "--list-sessions"]):
            main()
        captured = capsys.readouterr()
        assert "Found 1 saved sessions" in captured.out
        assert "test" in captured.out


def test_main_delete_session_success(capsys):
    with patch("pr.core.session.SessionManager") as mock_sm:
        mock_instance = mock_sm.return_value
        mock_instance.delete_session.return_value = True
        with patch("sys.argv", ["pr", "--delete-session", "test"]):
            main()
        captured = capsys.readouterr()
        assert "Session 'test' deleted" in captured.out


def test_main_delete_session_fail(capsys):
    with patch("pr.core.session.SessionManager") as mock_sm:
        mock_instance = mock_sm.return_value
        mock_instance.delete_session.return_value = False
        with patch("sys.argv", ["pr", "--delete-session", "test"]):
            main()
        captured = capsys.readouterr()
        assert "Error deleting session 'test'" in captured.err


def test_main_export_session_json(capsys):
    with patch("pr.core.session.SessionManager") as mock_sm:
        mock_instance = mock_sm.return_value
        mock_instance.export_session.return_value = True
        with patch("sys.argv", ["pr", "--export-session", "test", "output.json"]):
            main()
        captured = capsys.readouterr()
        assert "Session exported to output.json" in captured.out


def test_main_export_session_md(capsys):
    with patch("pr.core.session.SessionManager") as mock_sm:
        mock_instance = mock_sm.return_value
        mock_instance.export_session.return_value = True
        with patch("sys.argv", ["pr", "--export-session", "test", "output.md"]):
            main()
        captured = capsys.readouterr()
        assert "Session exported to output.md" in captured.out


def test_main_usage(capsys):
    usage = {"total_requests": 10, "total_tokens": 1000, "total_cost": 0.01}
    with patch(
        "pr.core.usage_tracker.UsageTracker.get_total_usage", return_value=usage
    ):
        with patch("sys.argv", ["pr", "--usage"]):
            main()
        captured = capsys.readouterr()
        assert "Total Usage Statistics" in captured.out
        assert "Requests: 10" in captured.out


def test_main_plugins_no_plugins(capsys):
    with patch("pr.plugins.loader.PluginLoader") as mock_loader:
        mock_instance = mock_loader.return_value
        mock_instance.load_plugins.return_value = None
        mock_instance.list_loaded_plugins.return_value = []
        with patch("sys.argv", ["pr", "--plugins"]):
            main()
        captured = capsys.readouterr()
        assert "No plugins loaded" in captured.out


def test_main_plugins_with_plugins(capsys):
    with patch("pr.plugins.loader.PluginLoader") as mock_loader:
        mock_instance = mock_loader.return_value
        mock_instance.load_plugins.return_value = None
        mock_instance.list_loaded_plugins.return_value = ["plugin1", "plugin2"]
        with patch("sys.argv", ["pr", "--plugins"]):
            main()
        captured = capsys.readouterr()
        assert "Loaded 2 plugins" in captured.out


def test_main_run_assistant():
    with patch("pr.__main__.Assistant") as mock_assistant:
        mock_instance = mock_assistant.return_value
        with patch("sys.argv", ["pr", "test message"]):
            main()
        mock_assistant.assert_called_once()
        mock_instance.run.assert_called_once()