"""
Test suite for /macos-resource-optimizer:3-monitor command.

Command: Continuous monitoring loop with alert generation
Delegation: manager-resource-coordinator (continuous monitoring, threshold checking, alert generation)
Tests: 3 (continuous loop, alert generation, termination conditions)
"""

import pytest
from unittest.mock import Mock, patch, MagicMock
import asyncio


class TestCommand3MonitorContinuousLoop:
    """Test 1: Continuous monitoring loop execution."""

    @pytest.mark.asyncio
    async def test_monitor_command_establishes_continuous_loop(self):
        """Test /macos-resource-optimizer:3-monitor establishes continuous monitoring loop."""

        with patch('Task') as mock_task:
            # Simulate continuous monitoring loop results
            loop_iteration_1 = {
                "iteration": 1,
                "timestamp": "2025-11-30T10:00:00Z",
                "status": "monitoring",
                "categories": {
                    "cpu": {"usage_percent": 45.2, "alert": False},
                    "memory": {"usage_percent": 75.0, "alert": False},
                    "disk": {"usage_percent": 65.0, "alert": False},
                    "thermal": {"cpu_temp_celsius": 65.0, "alert": False}
                }
            }

            loop_iteration_2 = {
                "iteration": 2,
                "timestamp": "2025-11-30T10:01:00Z",
                "status": "monitoring",
                "categories": {
                    "cpu": {"usage_percent": 52.1, "alert": False},
                    "memory": {"usage_percent": 82.0, "alert": False}
                }
            }

            mock_task.side_effect = [loop_iteration_1, loop_iteration_2]

            from unittest.mock import AsyncMock
            mock_execute = AsyncMock(side_effect=[loop_iteration_1, loop_iteration_2])

            result1 = await mock_execute()
            result2 = await mock_execute()

            # Verify continuous loop execution
            assert result1["iteration"] == 1
            assert result2["iteration"] == 2
            assert result1["status"] == "monitoring"
            assert result2["status"] == "monitoring"

    def test_monitor_loop_sampling_interval(self):
        """Test monitor loop maintains correct sampling interval (60 seconds)."""

        with patch('Task') as mock_task:
            mock_task.return_value = {
                "status": "monitoring",
                "loop_configuration": {
                    "sampling_interval_seconds": 60,
                    "iteration_count": 0,
                    "elapsed_time_seconds": 0
                }
            }

            result = mock_task(
                subagent_type="manager-resource-coordinator",
                prompt="Establish continuous monitoring loop: interval=60 seconds, check thresholds, generate alerts"
            )

            # Verify sampling interval
            assert result["loop_configuration"]["sampling_interval_seconds"] == 60

    def test_monitor_loop_iteration_tracking(self):
        """Test monitor loop tracks iteration count correctly."""

        with patch('Task') as mock_task:
            iterations = []
            for i in range(1, 4):
                mock_task.return_value = {
                    "iteration": i,
                    "timestamp": f"2025-11-30T10:{i:02d}:00Z",
                    "status": "monitoring"
                }
                iterations.append(mock_task.return_value)

            # Verify iteration tracking
            assert len(iterations) == 3
            assert iterations[0]["iteration"] == 1
            assert iterations[1]["iteration"] == 2
            assert iterations[2]["iteration"] == 3


class TestCommand3MonitorAlertGeneration:
    """Test 2: Alert generation and threshold management."""

    def test_monitor_generates_cpu_alert_on_threshold_exceeded(self):
        """Test monitor generates CPU alert when threshold exceeded."""

        with patch('Task') as mock_task:
            mock_task.return_value = {
                "status": "alert_generated",
                "iteration": 5,
                "timestamp": "2025-11-30T10:05:00Z",
                "categories": {
                    "cpu": {
                        "usage_percent": 88.5,
                        "alert": True,
                        "alert_type": "cpu_high_usage",
                        "threshold": 80.0,
                        "severity": "warning"
                    }
                },
                "alerts": [
                    {
                        "id": "alert_cpu_001",
                        "category": "cpu",
                        "message": "CPU usage high: 88.5% (threshold: 80%)",
                        "severity": "warning",
                        "recommendation": "Reduce background processes"
                    }
                ]
            }

            result = mock_task.return_value

            # Verify CPU alert generation
            assert result["status"] == "alert_generated"
            assert result["categories"]["cpu"]["alert"] is True
            assert len(result["alerts"]) > 0
            assert result["alerts"][0]["category"] == "cpu"

    def test_monitor_generates_memory_alert_on_threshold_exceeded(self):
        """Test monitor generates memory alert when threshold exceeded."""

        with patch('Task') as mock_task:
            mock_task.return_value = {
                "status": "alert_generated",
                "categories": {
                    "memory": {
                        "usage_percent": 94.0,
                        "alert": True,
                        "alert_type": "memory_critical",
                        "threshold": 85.0,
                        "severity": "critical"
                    }
                },
                "alerts": [
                    {
                        "id": "alert_memory_001",
                        "category": "memory",
                        "message": "Memory usage critical: 94.0% (threshold: 85%)",
                        "severity": "critical",
                        "recommendation": "Immediately clear cache or restart applications"
                    }
                ]
            }

            result = mock_task.return_value

            # Verify memory alert generation
            assert result["categories"]["memory"]["alert"] is True
            assert result["alerts"][0]["severity"] == "critical"

    def test_monitor_generates_thermal_alert_on_threshold_exceeded(self):
        """Test monitor generates thermal alert when threshold exceeded."""

        with patch('Task') as mock_task:
            mock_task.return_value = {
                "status": "alert_generated",
                "categories": {
                    "thermal": {
                        "cpu_temp_celsius": 92.5,
                        "alert": True,
                        "alert_type": "thermal_high_temperature",
                        "threshold": 85.0,
                        "severity": "warning"
                    }
                },
                "alerts": [
                    {
                        "id": "alert_thermal_001",
                        "category": "thermal",
                        "message": "CPU temperature high: 92.5C (threshold: 85C)",
                        "severity": "warning",
                        "recommendation": "Improve cooling or reduce system load"
                    }
                ]
            }

            result = mock_task.return_value

            # Verify thermal alert generation
            assert result["categories"]["thermal"]["alert"] is True
            assert "92.5" in result["alerts"][0]["message"]

    def test_monitor_no_alert_when_below_threshold(self):
        """Test monitor does not generate alert when below threshold."""

        with patch('Task') as mock_task:
            mock_task.return_value = {
                "status": "normal_operation",
                "categories": {
                    "cpu": {"usage_percent": 45.2, "alert": False},
                    "memory": {"usage_percent": 65.0, "alert": False},
                    "thermal": {"cpu_temp_celsius": 62.0, "alert": False}
                },
                "alerts": []
            }

            result = mock_task.return_value

            # Verify no alert generated
            assert result["status"] == "normal_operation"
            assert result["categories"]["cpu"]["alert"] is False
            assert len(result["alerts"]) == 0

    def test_monitor_alert_includes_recommendations(self):
        """Test monitor alerts include actionable recommendations."""

        with patch('Task') as mock_task:
            mock_task.return_value = {
                "status": "alert_generated",
                "alerts": [
                    {
                        "id": "alert_cpu_001",
                        "category": "cpu",
                        "message": "CPU usage high: 88.5%",
                        "severity": "warning",
                        "recommendation": "Reduce background processes or restart Activity Monitor"
                    }
                ]
            }

            result = mock_task.return_value

            # Verify recommendations present
            assert "recommendation" in result["alerts"][0]
            assert len(result["alerts"][0]["recommendation"]) > 0


class TestCommand3MonitorTerminationConditions:
    """Test 3: Monitoring loop termination conditions."""

    def test_monitor_terminates_on_user_interrupt(self):
        """Test monitor loop terminates on user interrupt (Ctrl+C)."""

        with patch('Task') as mock_task:
            mock_task.side_effect = KeyboardInterrupt("User interrupted monitoring loop with Ctrl+C")

            with pytest.raises(KeyboardInterrupt) as exc_info:
                Task(
                    subagent_type="manager-resource-coordinator",
                    prompt="Establish continuous monitoring loop"
                )

            assert "interrupted" in str(exc_info.value).lower()

    def test_monitor_terminates_on_timeout(self):
        """Test monitor loop terminates on timeout."""

        with patch('Task') as mock_task:
            mock_task.side_effect = TimeoutError("Monitoring loop exceeded maximum duration of 3600 seconds.")

            with pytest.raises(TimeoutError) as exc_info:
                Task(
                    subagent_type="manager-resource-coordinator",
                    prompt="Establish continuous monitoring loop"
                )

            assert "timeout" in str(exc_info.value).lower()

    def test_monitor_terminates_on_explicit_stop_command(self):
        """Test monitor loop terminates on explicit stop command."""

        with patch('Task') as mock_task:
            mock_task.return_value = {
                "status": "stopped",
                "termination_reason": "explicit_stop",
                "iterations_completed": 60,
                "total_runtime_seconds": 3600,
                "final_summary": {
                    "alerts_generated": 3,
                    "average_cpu_usage": 52.1,
                    "peak_memory_usage": 87.0
                }
            }

            result = mock_task.return_value

            # Verify graceful termination
            assert result["status"] == "stopped"
            assert result["termination_reason"] == "explicit_stop"
            assert result["iterations_completed"] > 0

    def test_monitor_terminates_on_coordinator_crash(self):
        """Test monitor loop terminates on coordinator crash with error logging."""

        with patch('Task') as mock_task:
            mock_task.side_effect = Exception("Coordinator process crashed: MemoryError in continuous loop.")

            with pytest.raises(Exception) as exc_info:
                Task(
                    subagent_type="manager-resource-coordinator",
                    prompt="Establish continuous monitoring loop"
                )

            assert "crashed" in str(exc_info.value).lower()

    def test_monitor_terminates_on_system_error(self):
        """Test monitor loop terminates on system error with graceful shutdown."""

        with patch('Task') as mock_task:
            mock_task.return_value = {
                "status": "error_stopped",
                "error": "System error during monitoring: Cannot access system metrics",
                "graceful_shutdown": True,
                "final_iteration": 25,
                "runtime_seconds": 1500
            }

            result = mock_task.return_value

            # Verify error termination
            assert result["status"] == "error_stopped"
            assert result["graceful_shutdown"] is True

    def test_monitor_saves_state_on_termination(self):
        """Test monitor saves monitoring state on termination."""

        with patch('Task') as mock_task:
            mock_task.return_value = {
                "status": "stopped",
                "state_saved": True,
                "saved_state": {
                    "last_metrics": {
                        "cpu": 52.1,
                        "memory": 78.0,
                        "thermal": 65.0
                    },
                    "iteration_count": 60,
                    "last_timestamp": "2025-11-30T11:00:00Z"
                }
            }

            result = mock_task.return_value

            # Verify state saving
            assert result["state_saved"] is True
            assert "saved_state" in result


@pytest.fixture
def mock_task():
    """Fixture providing mock Task function."""
    with patch('Task') as mock:
        yield mock


def test_monitor_command_continuous_operation(mock_task):
    """Integration test: Continuous monitoring operation for 60 seconds (simulated)."""

    # Simulate 3 monitoring iterations (each 20 seconds apart for testing)
    iterations = [
        {
            "iteration": 1,
            "status": "monitoring",
            "categories": {"cpu": {"usage_percent": 45.2, "alert": False}}
        },
        {
            "iteration": 2,
            "status": "monitoring",
            "categories": {"cpu": {"usage_percent": 52.1, "alert": False}}
        },
        {
            "iteration": 3,
            "status": "stopped",
            "iterations_completed": 3,
            "total_runtime_seconds": 120
        }
    ]

    mock_task.side_effect = iterations

    # Execute first iteration
    result1 = mock_task(
        subagent_type="manager-resource-coordinator",
        prompt="Establish continuous monitoring loop"
    )

    # Execute second iteration
    result2 = mock_task(
        subagent_type="manager-resource-coordinator",
        prompt="Continue monitoring loop"
    )

    # Execute final iteration (stop)
    result3 = mock_task(
        subagent_type="manager-resource-coordinator",
        prompt="Continue monitoring loop"
    )

    # Verify monitoring operation
    assert result1["status"] == "monitoring"
    assert result2["status"] == "monitoring"
    assert result3["status"] == "stopped"
    assert result3["iterations_completed"] == 3
