#!/usr/bin/env python3
"""
Test Suite for Soft Context Swapping Implementation

This test suite validates the "Soft Context Swapping" feature that replaces
the previous browser restart mechanism with efficient cookie-based authentication
profile rotation.

Key improvements being tested:
1. Uses context.clear_cookies() and context.add_cookies() instead of browser restart
2. Performance improvement from 3-5 seconds (hard restart) to <1 second (soft swap)
3. Maintains browser state while only swapping authentication cookies
4. Proper error handling and fallback mechanisms

Run with: python tests/test_soft_context_swapping.py
"""

import json
import os
import sys
import time
import unittest
from unittest.mock import AsyncMock, Mock, patch

# Add project root to Python path
sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))

from api_utils.server_state import state
from browser_utils.auth_rotation import _get_next_profile, perform_auth_rotation
from config.global_state import GlobalState


class TestSoftContextSwapping(unittest.TestCase):
    """Test suite for Soft Context Swapping implementation"""

    def setUp(self):
        """Initialize test environment before each test"""
        # Reset global state
        GlobalState.reset_quota_status()
        GlobalState.init_rotation_lock()

        # Create mock page instance with mock context
        self.mock_page = Mock()
        self.mock_page.is_closed.return_value = False
        self.mock_page.context = Mock()
        self.mock_context = self.mock_page.context

        # Setup async mock methods for context operations
        self.mock_context.clear_cookies = AsyncMock()
        self.mock_context.add_cookies = AsyncMock()

        # Store original state values
        self.original_page_instance = state.page_instance
        self.original_browser_instance = state.browser_instance

        # Set mock state values
        state.page_instance = self.mock_page
        state.browser_instance = None  # Should not be used in soft swap

        # Mock profile data
        self.test_cookies = [
            {
                "name": "session_id",
                "value": "test_session_123",
                "domain": ".aistudio.google.com",
                "path": "/",
            },
            {
                "name": "auth_token",
                "value": "test_auth_456",
                "domain": ".aistudio.google.com",
                "path": "/",
            },
        ]

        self.test_storage_state = {"cookies": self.test_cookies, "origins": []}

    def tearDown(self):
        """Clean up after each test"""
        # Restore original state values
        state.page_instance = self.original_page_instance
        state.browser_instance = self.original_browser_instance

        # Clean up any test files
        test_profile_paths = [
            "auth_profiles/saved/test_profile_1.json",
            "auth_profiles/active/test_profile_2.json",
            "auth_profiles/emergency/test_emergency.json",
        ]
        for path in test_profile_paths:
            if os.path.exists(path):
                os.remove(path)

    @patch("browser_utils.auth_rotation._get_next_profile")
    @patch("builtins.open")
    @patch("browser_utils.auth_rotation._perform_canary_test")
    async def test_soft_context_swap_performed(
        self, mock_canary, mock_open, mock_get_next_profile
    ):
        """Test that soft context swap is performed with clear_cookies() and add_cookies()"""

        # Setup mocks
        test_profile_path = "auth_profiles/saved/test_profile.json"
        mock_get_next_profile.return_value = test_profile_path
        mock_canary.return_value = True  # Successful canary test

        # Mock file operations
        mock_file = Mock()
        mock_open.return_value.__enter__.return_value = mock_file
        mock_file.read.return_value = json.dumps(self.test_storage_state)

        # Execute rotation
        result = await perform_auth_rotation()

        # Verify soft context swap was performed
        self.assertTrue(result, "Rotation should complete successfully")
        self.mock_context.clear_cookies.assert_called_once()
        self.mock_context.add_cookies.assert_called_once_with(self.test_cookies)

        # Verify browser restart functions were NOT called
        # (These should remain None/unmocked, indicating they weren't used)
        self.assertIsNone(state.browser_instance)

        # Verify canary test was called
        mock_canary.assert_called_once_with(self.mock_page)

    @patch("browser_utils.auth_rotation._get_next_profile")
    @patch("builtins.open")
    @patch("browser_utils.auth_rotation._perform_canary_test")
    async def test_rotation_performance_benchmark(
        self, mock_canary, mock_open, mock_get_next_profile
    ):
        """Test that soft context swapping completes within performance target (<1 second)"""

        # Setup mocks
        test_profile_path = "auth_profiles/saved/test_profile.json"
        mock_get_next_profile.return_value = test_profile_path
        mock_canary.return_value = True

        # Mock file operations
        mock_file = Mock()
        mock_open.return_value.__enter__.return_value = mock_file
        mock_file.read.return_value = json.dumps(self.test_storage_state)

        # Measure rotation time
        start_time = time.time()
        result = await perform_auth_rotation()
        end_time = time.time()

        rotation_time = end_time - start_time

        # Verify performance target
        self.assertTrue(result, "Rotation should complete successfully")
        self.assertLess(
            rotation_time,
            1.0,
            f"Soft context swap took {rotation_time:.3f}s, should be < 1.0s",
        )

        # Log performance for verification
        print(f"Soft context swap completed in {rotation_time:.3f} seconds")

    @patch("browser_utils.auth_rotation._get_next_profile")
    @patch("browser_utils.auth_rotation._perform_canary_test")
    async def test_browser_restart_not_called(self, mock_canary, mock_get_next_profile):
        """Test that browser restart functions are not called during soft context swap"""

        # Setup mocks
        test_profile_path = "auth_profiles/saved/test_profile.json"
        mock_get_next_profile.return_value = test_profile_path
        mock_canary.return_value = True

        # Create a separate mock to track browser restart attempts
        getattr(
            state.browser_instance, "close", None
        ) if state.browser_instance else None

        # Mock the page instance to ensure it's NOT closed
        self.mock_page.close = AsyncMock()

        # Mock file operations
        with patch("builtins.open") as mock_file_open:
            mock_file = Mock()
            mock_file_open.return_value.__enter__.return_value = mock_file
            mock_file.read.return_value = json.dumps(self.test_storage_state)

            # Execute rotation
            await perform_auth_rotation()

            # Verify browser instance methods were NOT called
            self.mock_page.close.assert_not_called()

            # Verify browser instance was not used (remains None)
            self.assertIsNone(state.browser_instance)

    @patch("browser_utils.auth_rotation._get_next_profile")
    @patch("builtins.open")
    @patch("browser_utils.auth_rotation._perform_canary_test")
    async def test_context_operations_sequence(
        self, mock_canary, mock_open, mock_get_next_profile
    ):
        """Test that context operations are called in the correct sequence"""

        # Setup mocks
        test_profile_path = "auth_profiles/saved/test_profile.json"
        mock_get_next_profile.return_value = test_profile_path
        mock_canary.return_value = True

        # Mock file operations
        mock_file = Mock()
        mock_open.return_value.__enter__.return_value = mock_file
        mock_file.read.return_value = json.dumps(self.test_storage_state)

        # Execute rotation
        await perform_auth_rotation()

        # Verify the sequence of operations
        clear_call_args = self.mock_context.clear_cookies.call_args_list
        add_call_args = self.mock_context.add_cookies.call_args_list

        # Should have exactly one call to each
        self.assertEqual(
            len(clear_call_args), 1, "clear_cookies should be called exactly once"
        )
        self.assertEqual(
            len(add_call_args), 1, "add_cookies should be called exactly once"
        )

        # Verify clear_cookies was called before add_cookies
        clear_time = clear_call_args[0][1].get("timestamp", 0) if clear_call_args else 0
        add_time = add_call_args[0][1].get("timestamp", 1) if add_call_args else 1

        # In the actual implementation, we verify this by call order
        self.assertLess(
            clear_time, add_time, "clear_cookies should be called before add_cookies"
        )

    @patch("browser_utils.auth_rotation._get_next_profile")
    @patch("builtins.open")
    @patch("browser_utils.auth_rotation._perform_canary_test")
    async def test_error_during_soft_swap(
        self, mock_canary, mock_open, mock_get_next_profile
    ):
        """Test error handling during soft context swap"""

        # Setup mocks
        test_profile_path = "auth_profiles/saved/test_profile.json"
        mock_get_next_profile.return_value = test_profile_path
        mock_canary.return_value = True

        # Mock file operations
        mock_file = Mock()
        mock_open.return_value.__enter__.return_value = mock_file
        mock_file.read.return_value = json.dumps(self.test_storage_state)

        # Make add_cookies raise an exception
        self.mock_context.add_cookies.side_effect = Exception("Cookie injection failed")

        # Execute rotation and expect it to handle the error gracefully
        result = await perform_auth_rotation()

        # Should fail due to the error
        self.assertFalse(result, "Rotation should fail when cookie injection fails")

        # Verify both operations were attempted
        self.mock_context.clear_cookies.assert_called_once()
        self.mock_context.add_cookies.assert_called_once()

    @patch("browser_utils.auth_rotation._get_next_profile")
    async def test_no_available_profiles(self, mock_get_next_profile):
        """Test behavior when no auth profiles are available"""

        # Setup mocks
        mock_get_next_profile.return_value = None

        # Execute rotation
        result = await perform_auth_rotation()

        # Should fail due to no profiles
        self.assertFalse(result, "Rotation should fail when no profiles are available")

        # Verify context operations were NOT called
        self.mock_context.clear_cookies.assert_not_called()
        self.mock_context.add_cookies.assert_not_called()

    @patch("browser_utils.auth_rotation._get_next_profile")
    @patch("builtins.open")
    async def test_page_instance_unavailable(self, mock_open, mock_get_next_profile):
        """Test behavior when page instance is unavailable or closed"""

        # Setup mocks
        test_profile_path = "auth_profiles/saved/test_profile.json"
        mock_get_next_profile.return_value = test_profile_path

        # Mock file operations
        mock_file = Mock()
        mock_open.return_value.__enter__.return_value = mock_file
        mock_file.read.return_value = json.dumps(self.test_storage_state)

        # Simulate closed page
        self.mock_page.is_closed.return_value = True

        # Execute rotation
        result = await perform_auth_rotation()

        # Should fail due to unavailable page
        self.assertFalse(result, "Rotation should fail when page is closed")

        # Verify context operations were NOT called
        self.mock_context.clear_cookies.assert_not_called()
        self.mock_context.add_cookies.assert_not_called()

    @patch("browser_utils.auth_rotation._get_next_profile")
    @patch("builtins.open")
    @patch("browser_utils.auth_rotation._perform_canary_test")
    async def test_canary_test_failure_handling(
        self, mock_canary, mock_open, mock_get_next_profile
    ):
        """Test behavior when canary test fails after soft context swap"""

        # Setup mocks
        test_profile_path = "auth_profiles/saved/test_profile.json"
        mock_get_next_profile.return_value = test_profile_path
        mock_canary.return_value = False  # Failed canary test

        # Mock file operations
        mock_file = Mock()
        mock_open.return_value.__enter__.return_value = mock_file
        mock_file.read.return_value = json.dumps(self.test_storage_state)

        # Execute rotation
        result = await perform_auth_rotation()

        # Should fail due to canary test failure
        self.assertFalse(result, "Rotation should fail when canary test fails")

        # Verify context operations WERE called (soft swap was attempted)
        self.mock_context.clear_cookies.assert_called_once()
        self.mock_context.add_cookies.assert_called_once()

    def test_rotation_lock_management(self):
        """Test that rotation lock is properly managed during soft context swap"""

        # Verify initial state
        self.assertTrue(
            GlobalState.AUTH_ROTATION_LOCK.is_set(),
            "Rotation lock should be initially set",
        )

        # Test will be completed by the async tests above which verify lock behavior
        # This is a basic test to ensure the lock mechanism is working

    @patch("browser_utils.auth_rotation._get_next_profile")
    @patch("builtins.open")
    @patch("browser_utils.auth_rotation._perform_canary_test")
    async def test_profile_state_updated(
        self, mock_canary, mock_open, mock_get_next_profile
    ):
        """Test that global profile state is updated after successful rotation"""

        # Setup mocks
        test_profile_path = "auth_profiles/saved/test_profile.json"
        mock_get_next_profile.return_value = test_profile_path
        mock_canary.return_value = True

        # Mock file operations
        mock_file = Mock()
        mock_open.return_value.__enter__.return_value = mock_file
        mock_file.read.return_value = json.dumps(self.test_storage_state)

        # Execute rotation
        result = await perform_auth_rotation()

        # Verify success
        self.assertTrue(result, "Rotation should complete successfully")

        # Verify server state was updated
        self.assertEqual(state.current_auth_profile_path, test_profile_path)
        self.assertEqual(os.environ.get("ACTIVE_AUTH_JSON_PATH"), test_profile_path)


class TestSoftContextSwappingIntegration(unittest.TestCase):
    """Integration tests for soft context swapping with real components"""

    def setUp(self):
        """Set up integration test environment"""
        # Create temporary test profile files
        self.test_cookies = [
            {
                "name": "session_id",
                "value": "test_session_123",
                "domain": ".aistudio.google.com",
                "path": "/",
            }
        ]

        self.test_storage_state = {"cookies": self.test_cookies, "origins": []}

        # Create test profile directories
        os.makedirs("auth_profiles/saved", exist_ok=True)
        os.makedirs("auth_profiles/active", exist_ok=True)
        os.makedirs("auth_profiles/emergency", exist_ok=True)

        # Create test profile files
        self.test_profile_1 = "auth_profiles/saved/test_profile_1.json"
        self.test_profile_2 = "auth_profiles/active/test_profile_2.json"
        self.test_emergency = "auth_profiles/emergency/test_emergency.json"

        with open(self.test_profile_1, "w") as f:
            json.dump(self.test_storage_state, f)
        with open(self.test_profile_2, "w") as f:
            json.dump(self.test_storage_state, f)
        with open(self.test_emergency, "w") as f:
            json.dump(self.test_storage_state, f)

    def tearDown(self):
        """Clean up integration test files"""
        test_files = [self.test_profile_1, self.test_profile_2, self.test_emergency]
        for file_path in test_files:
            if os.path.exists(file_path):
                os.remove(file_path)

    def test_profile_selection_integration(self):
        """Test that profile selection works with actual file system"""

        # Test profile selection from standard directories
        selected_profile = _get_next_profile()

        # Should find and return one of our test profiles
        self.assertIsNotNone(selected_profile, "Should find available profiles")
        assert selected_profile is not None  # Type narrowing for type checker
        self.assertTrue(selected_profile.endswith(".json"), "Should return JSON file")

        # Should be one of our test profiles (use absolute paths for comparison)
        # Note: The rotation logic now includes emergency profiles in standard rotation scan
        valid_profiles = [
            os.path.abspath(self.test_profile_1),
            os.path.abspath(self.test_profile_2),
            os.path.abspath(self.test_emergency),
        ]
        self.assertIn(
            os.path.abspath(selected_profile),
            valid_profiles,
            "Should select from available profiles",
        )

    def test_cooldown_profile_exclusion(self):
        """Test that profiles in cooldown are excluded from selection"""

        # Import cooldown functionality to simulate cooldown state
        from browser_utils.auth_rotation import _COOLDOWN_PROFILES

        # Add one profile to cooldown
        _COOLDOWN_PROFILES[self.test_profile_1] = time.time() + 3600  # 1 hour cooldown

        # Test profile selection
        selected_profile = _get_next_profile()

        # Should not return the cooled-down profile
        self.assertIsNotNone(selected_profile, "Should find available profiles")
        self.assertNotEqual(
            selected_profile, self.test_profile_1, "Should exclude cooled-down profiles"
        )


def run_tests():
    """Run all soft context swapping tests and provide summary"""
    print("Soft Context Swapping - Test Suite")
    print("=" * 60)
    print("Testing the new cookie-based authentication rotation system...")
    print("Performance target: <1 second (vs old 3-5 second hard restart)")
    print("=" * 60)

    # Create test suite
    test_classes = [TestSoftContextSwapping, TestSoftContextSwappingIntegration]

    total_tests = 0
    passed_tests = 0

    for test_class in test_classes:
        print(f"\nRunning {test_class.__name__}...")
        suite = unittest.TestLoader().loadTestsFromTestCase(test_class)
        result = unittest.TextTestRunner(verbosity=2).run(suite)

        total_tests += result.testsRun
        passed_tests += result.testsRun - len(result.failures) - len(result.errors)

        if result.failures:
            print(f"  ❌ Failures: {len(result.failures)}")
            for failure in result.failures:
                print(f"    - {failure[0]}")
        if result.errors:
            print(f"  🚨 Errors: {len(result.errors)}")
            for error in result.errors:
                print(f"    - {error[0]}")

    print("\n" + "=" * 60)
    print("Test Summary:")
    print(f"  Total Tests: {total_tests}")
    print(f"  Passed: {passed_tests}")
    print(
        f"  Success Rate: {(passed_tests / total_tests) * 100:.1f}%"
        if total_tests > 0
        else "  Success Rate: 0%"
    )

    if passed_tests == total_tests:
        print("\n🎉 All tests passed! Soft Context Swapping is working correctly.")
        print("✅ Performance improvements validated")
        print("✅ Cookie-based rotation confirmed")
        print("✅ Browser restart prevention verified")
    else:
        print(
            f"\n⚠️  {total_tests - passed_tests} test(s) failed. Review the implementation."
        )

    return passed_tests == total_tests


if __name__ == "__main__":
    success = run_tests()
    sys.exit(0 if success else 1)