"""
Test suite for session prompt adoption workflow.

This module tests the session prompt adoption workflow including:
- Promoting session overrides to permanent files
- Validation before adoption
- Backup and rollback capabilities
- Error handling for adoption process

**Feature: prompt-optimization, Task 11.5: Add session prompt adoption workflow**
**Validates: Requirements 9.5**
"""

import pytest
import sys
import tempfile
import os
from pathlib import Path
from unittest.mock import patch, mock_open, MagicMock
from datetime import datetime

# Add src to path for imports
sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'src'))

from config.prompt_management.prompt_controller import PromptController


class TestSessionPromptAdoption:
    """Test session prompt adoption workflow functionality."""
    
    def setup_method(self):
        """Set up test environment."""
        self.controller = PromptController()
        # Clear any existing state
        self.controller._prompt_cache.clear()
        self.controller._session_overrides.clear()
    
    def test_promote_session_to_file_success(self):
        """Test successful promotion of session override to file."""
        agent_type = 'spiritual_monitor'
        session_id = 'test_promotion_session'
        override_content = """
        <system_role>
        Updated spiritual monitor prompt for testing promotion workflow.
        This content should be promoted to the permanent file.
        </system_role>
        
        <output_format>
        Respond with JSON: {"state": "green|yellow|red", "confidence": 0.0-1.0}
        </output_format>
        """
        
        # Set session override
        success = self.controller.set_session_override(agent_type, override_content, session_id)
        assert success, "Session override should be set successfully"
        
        # Mock file operations to avoid actual file changes
        with patch('pathlib.Path.exists', return_value=True), \
             patch('pathlib.Path.rename') as mock_rename, \
             patch('builtins.open', mock_open()) as mock_file:
            
            # Promote session to file
            result = self.controller.promote_session_to_file(agent_type, session_id)
            
            # Should succeed
            assert result, "Promotion should succeed"
            
            # Verify backup was created
            mock_rename.assert_called_once()
            
            # Verify file was written
            mock_file.assert_called_once()
            handle = mock_file()
            handle.write.assert_called_once_with(override_content)
    
    def test_promote_session_to_file_with_backup(self):
        """Test that promotion creates proper backup of existing file."""
        agent_type = 'triage_question'
        session_id = 'backup_test_session'
        override_content = "New triage question prompt content"
        
        # Set session override
        self.controller.set_session_override(agent_type, override_content, session_id)
        
        # Mock file operations - test that backup logic is invoked
        with patch('pathlib.Path.exists', return_value=True), \
             patch('pathlib.Path.rename') as mock_rename, \
             patch('pathlib.Path.with_suffix') as mock_with_suffix, \
             patch('builtins.open', mock_open()):
            
            # Setup mock backup path
            mock_backup_path = MagicMock()
            mock_with_suffix.return_value = mock_backup_path
            
            result = self.controller.promote_session_to_file(agent_type, session_id)
            
            # Should succeed
            assert result, "Promotion with backup should succeed"
            
            # Verify backup path was created with timestamp
            assert mock_with_suffix.called, "Backup path should be created"
            if mock_with_suffix.called:
                backup_call_args = str(mock_with_suffix.call_args[0][0])
                assert '.backup.' in backup_call_args
                assert datetime.now().strftime('%Y%m%d') in backup_call_args
    
    def test_promote_session_to_file_no_override(self):
        """Test promotion when no session override exists."""
        agent_type = 'spiritual_monitor'
        session_id = 'no_override_session'
        
        # Try to promote without setting override
        result = self.controller.promote_session_to_file(agent_type, session_id)
        
        # Should fail gracefully
        assert not result, "Promotion should fail when no override exists"
    
    def test_promote_session_to_file_clears_override(self):
        """Test that promotion clears the session override."""
        agent_type = 'triage_evaluator'
        session_id = 'clear_override_session'
        override_content = "Content to be promoted and cleared"
        
        # Set session override
        self.controller.set_session_override(agent_type, override_content, session_id)
        
        # Verify override exists
        assert self.controller._has_session_override(agent_type, session_id)
        
        # Mock file operations
        with patch('pathlib.Path.exists', return_value=False), \
             patch('builtins.open', mock_open()):
            
            result = self.controller.promote_session_to_file(agent_type, session_id)
            
            # Should succeed
            assert result, "Promotion should succeed"
            
            # Verify override was cleared
            assert not self.controller._has_session_override(agent_type, session_id)
    
    def test_promote_session_to_file_clears_cache(self):
        """Test that promotion clears the prompt cache."""
        agent_type = 'spiritual_monitor'
        session_id = 'cache_clear_session'
        override_content = "Content for cache clearing test"
        
        # Set session override and load config to populate cache
        self.controller.set_session_override(agent_type, override_content, session_id)
        config = self.controller.get_prompt(agent_type, session_id=session_id)
        
        # Verify cache is populated
        cache_key = f"{agent_type}_{session_id}"
        assert cache_key in self.controller._prompt_cache
        
        # Mock file operations
        with patch('pathlib.Path.exists', return_value=False), \
             patch('builtins.open', mock_open()):
            
            result = self.controller.promote_session_to_file(agent_type, session_id)
            
            # Should succeed
            assert result, "Promotion should succeed"
            
            # Verify cache was cleared
            assert len(self.controller._prompt_cache) == 0
    
    def test_promote_session_to_file_error_handling(self):
        """Test error handling during promotion process."""
        agent_type = 'spiritual_monitor'
        session_id = 'error_test_session'
        override_content = "Content for error testing"
        
        # Set session override
        self.controller.set_session_override(agent_type, override_content, session_id)
        
        # Mock file operation that raises exception
        with patch('pathlib.Path.exists', return_value=True), \
             patch('pathlib.Path.rename', side_effect=OSError("Permission denied")):
            
            result = self.controller.promote_session_to_file(agent_type, session_id)
            
            # Should fail gracefully
            assert not result, "Promotion should fail gracefully on file errors"
            
            # Session override should still exist (not cleared on failure)
            assert self.controller._has_session_override(agent_type, session_id)
    
    def test_promote_session_validation_before_adoption(self):
        """Test validation of session content before promotion."""
        agent_type = 'spiritual_monitor'
        session_id = 'validation_test_session'
        
        # Test with empty content (should still work but might be flagged)
        empty_content = ""
        self.controller.set_session_override(agent_type, empty_content, session_id)
        
        with patch('pathlib.Path.exists', return_value=False), \
             patch('builtins.open', mock_open()):
            
            result = self.controller.promote_session_to_file(agent_type, session_id)
            
            # Should still succeed (validation is informational, not blocking)
            assert result, "Promotion should succeed even with empty content"
    
    def test_promote_session_with_placeholders(self):
        """Test promotion of session content containing placeholders."""
        agent_type = 'spiritual_monitor'
        session_id = 'placeholder_test_session'
        override_content = """
        <system_role>
        You are a spiritual distress classifier.
        
        Use these indicators:
        {{SHARED_INDICATORS}}
        
        Apply these rules:
        {{SHARED_RULES}}
        </system_role>
        """
        
        # Set session override with placeholders
        self.controller.set_session_override(agent_type, override_content, session_id)
        
        # Mock file operations
        with patch('pathlib.Path.exists', return_value=False), \
             patch('builtins.open', mock_open()) as mock_file:
            
            result = self.controller.promote_session_to_file(agent_type, session_id)
            
            # Should succeed
            assert result, "Promotion should succeed with placeholder content"
            
            # Verify original content (with placeholders) was written to file
            handle = mock_file()
            written_content = handle.write.call_args[0][0]
            assert "{{SHARED_INDICATORS}}" in written_content
            assert "{{SHARED_RULES}}" in written_content
    
    def test_multiple_session_promotions(self):
        """Test promoting multiple different sessions."""
        sessions_data = [
            ('spiritual_monitor', 'session_1', 'Content for session 1'),
            ('triage_question', 'session_2', 'Content for session 2'),
            ('triage_evaluator', 'session_3', 'Content for session 3')
        ]
        
        # Set all session overrides
        for agent_type, session_id, content in sessions_data:
            success = self.controller.set_session_override(agent_type, content, session_id)
            assert success, f"Should set override for {agent_type} session {session_id}"
        
        # Promote all sessions
        with patch('pathlib.Path.exists', return_value=False), \
             patch('builtins.open', mock_open()):
            
            for agent_type, session_id, content in sessions_data:
                result = self.controller.promote_session_to_file(agent_type, session_id)
                assert result, f"Should promote {agent_type} session {session_id}"
                
                # Verify override was cleared
                assert not self.controller._has_session_override(agent_type, session_id)
    
    def test_promote_session_rollback_capability(self):
        """Test that backup files enable rollback capability."""
        agent_type = 'spiritual_monitor'
        session_id = 'rollback_test_session'
        override_content = "New content that might need rollback"
        
        # Set session override
        self.controller.set_session_override(agent_type, override_content, session_id)
        
        # Mock file operations to test backup creation
        with patch('pathlib.Path.exists', return_value=True), \
             patch('pathlib.Path.rename') as mock_rename, \
             patch('pathlib.Path.with_suffix') as mock_with_suffix, \
             patch('builtins.open', mock_open()):
            
            # Setup mock backup path
            mock_backup_path = MagicMock()
            mock_with_suffix.return_value = mock_backup_path
            
            result = self.controller.promote_session_to_file(agent_type, session_id)
            
            # Should succeed
            assert result, "Promotion should succeed"
            
            # Verify backup operations were called
            assert mock_with_suffix.called, "Backup path should be created"
            assert mock_rename.called, "File should be renamed for backup"
            
            # Verify backup path has correct format
            if mock_with_suffix.called:
                backup_call_args = str(mock_with_suffix.call_args[0][0])
                assert '.backup.' in backup_call_args, "Backup should have .backup. in filename"


class TestSessionPromptAdoptionIntegration:
    """Test integration aspects of session prompt adoption."""
    
    def setup_method(self):
        """Set up test environment."""
        self.controller = PromptController()
        self.controller._prompt_cache.clear()
        self.controller._session_overrides.clear()
    
    def test_adoption_workflow_end_to_end(self):
        """Test complete adoption workflow from session to file."""
        agent_type = 'spiritual_monitor'
        session_id = 'end_to_end_session'
        
        # Step 1: Get original prompt
        original_config = self.controller.get_prompt(agent_type)
        original_content = original_config.base_prompt
        
        # Step 2: Set session override
        override_content = "Modified prompt content for end-to-end test"
        success = self.controller.set_session_override(agent_type, override_content, session_id)
        assert success
        
        # Step 3: Verify session override is active
        session_config = self.controller.get_prompt(agent_type, session_id=session_id)
        assert override_content in session_config.base_prompt
        
        # Step 4: Promote to file
        with patch('pathlib.Path.exists', return_value=True), \
             patch('pathlib.Path.rename'), \
             patch('builtins.open', mock_open()):
            
            promotion_result = self.controller.promote_session_to_file(agent_type, session_id)
            assert promotion_result
        
        # Step 5: Verify session override was cleared
        assert not self.controller._has_session_override(agent_type, session_id)
        
        # Step 6: Verify cache was cleared
        assert len(self.controller._prompt_cache) == 0
    
    def test_adoption_preserves_shared_components(self):
        """Test that adoption preserves shared component integration."""
        agent_type = 'spiritual_monitor'
        session_id = 'shared_components_session'
        
        # Create override with shared component placeholders
        override_content = """
        <system_role>
        Enhanced spiritual monitor with shared components:
        {{SHARED_INDICATORS}}
        {{SHARED_RULES}}
        </system_role>
        """
        
        # Set session override
        self.controller.set_session_override(agent_type, override_content, session_id)
        
        # Get session config to verify placeholder replacement works
        session_config = self.controller.get_prompt(agent_type, session_id=session_id)
        assert '{{SHARED_INDICATORS}}' not in session_config.base_prompt
        assert '{{SHARED_RULES}}' not in session_config.base_prompt
        
        # Promote to file (should preserve original placeholders)
        with patch('pathlib.Path.exists', return_value=False), \
             patch('builtins.open', mock_open()) as mock_file:
            
            result = self.controller.promote_session_to_file(agent_type, session_id)
            assert result
            
            # Verify original content with placeholders was written
            written_content = mock_file().write.call_args[0][0]
            assert '{{SHARED_INDICATORS}}' in written_content
            assert '{{SHARED_RULES}}' in written_content


if __name__ == '__main__':
    pytest.main([__file__, '-v'])