"""
Copyright 2024-2026 ReplyPier

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
"""

from unittest.mock import patch, MagicMock
from app.knowledge.content_summarizer import ContentSummarizer, get_content_summarizer


class TestContentSummarizer:
    """Test suite for ContentSummarizer class"""

    def test_init_disabled(self):
        """Test initialization when summarization is disabled"""
        with patch('app.knowledge.content_summarizer.settings') as mock_settings:
            mock_settings.KNOWLEDGE_SUMMARY_ENABLED = False
            mock_settings.KNOWLEDGE_SUMMARY_MODEL_TYPE = "GROQ"
            mock_settings.KNOWLEDGE_SUMMARY_MODEL_NAME = "llama-3.1-8b-instant"
            mock_settings.KNOWLEDGE_SUMMARY_API_KEY = ""
            mock_settings.KNOWLEDGE_SUMMARY_MAX_TOKENS = 4000

            summarizer = ContentSummarizer()

            assert not summarizer.enabled
            assert summarizer._agent is None

    def test_init_enabled_no_api_key(self):
        """Test initialization when enabled but no API key"""
        with patch('app.knowledge.content_summarizer.settings') as mock_settings:
            mock_settings.KNOWLEDGE_SUMMARY_ENABLED = True
            mock_settings.KNOWLEDGE_SUMMARY_MODEL_TYPE = "GROQ"
            mock_settings.KNOWLEDGE_SUMMARY_MODEL_NAME = "llama-3.1-8b-instant"
            mock_settings.KNOWLEDGE_SUMMARY_API_KEY = ""
            mock_settings.KNOWLEDGE_SUMMARY_MAX_TOKENS = 4000

            summarizer = ContentSummarizer()

            assert not summarizer.enabled

    def test_init_enabled_with_api_key(self):
        """Test initialization when enabled with API key"""
        with patch('app.knowledge.content_summarizer.settings') as mock_settings:
            mock_settings.KNOWLEDGE_SUMMARY_ENABLED = True
            mock_settings.KNOWLEDGE_SUMMARY_MODEL_TYPE = "GROQ"
            mock_settings.KNOWLEDGE_SUMMARY_MODEL_NAME = "llama-3.1-8b-instant"
            mock_settings.KNOWLEDGE_SUMMARY_API_KEY = "test_api_key"
            mock_settings.KNOWLEDGE_SUMMARY_MAX_TOKENS = 4000

            summarizer = ContentSummarizer()

            assert summarizer.enabled
            assert summarizer.api_key == "test_api_key"

    def test_init_openai_compatible_no_base_url(self):
        """OPENAI_COMPATIBLE without a base_url disables summarization, like a missing API key"""
        with patch('app.knowledge.content_summarizer.settings') as mock_settings:
            mock_settings.KNOWLEDGE_SUMMARY_ENABLED = True
            mock_settings.KNOWLEDGE_SUMMARY_MODEL_TYPE = "OPENAI_COMPATIBLE"
            mock_settings.KNOWLEDGE_SUMMARY_MODEL_NAME = "local-model"
            mock_settings.KNOWLEDGE_SUMMARY_API_KEY = "test_api_key"
            mock_settings.KNOWLEDGE_SUMMARY_MAX_TOKENS = 4000
            mock_settings.KNOWLEDGE_SUMMARY_BASE_URL = ""

            summarizer = ContentSummarizer()

            assert not summarizer.enabled

    def test_init_openai_compatible_with_base_url(self):
        """OPENAI_COMPATIBLE with a base_url stays enabled and passes base_url to create_model"""
        with patch('app.knowledge.content_summarizer.settings') as mock_settings, \
             patch('app.knowledge.content_summarizer.create_model') as mock_create_model:
            mock_settings.KNOWLEDGE_SUMMARY_ENABLED = True
            mock_settings.KNOWLEDGE_SUMMARY_MODEL_TYPE = "OPENAI_COMPATIBLE"
            mock_settings.KNOWLEDGE_SUMMARY_MODEL_NAME = "local-model"
            mock_settings.KNOWLEDGE_SUMMARY_API_KEY = "test_api_key"
            mock_settings.KNOWLEDGE_SUMMARY_MAX_TOKENS = 4000
            mock_settings.KNOWLEDGE_SUMMARY_BASE_URL = "http://localhost:11434/v1"

            summarizer = ContentSummarizer()
            assert summarizer.enabled

            summarizer._get_agent()

            mock_create_model.assert_called_once_with(
                model_type="OPENAI_COMPATIBLE",
                api_key="test_api_key",
                model_name="local-model",
                max_tokens=4000,
                base_url="http://localhost:11434/v1"
            )

    def test_summarize_disabled(self):
        """Test that original content is returned when summarization is disabled"""
        with patch('app.knowledge.content_summarizer.settings') as mock_settings:
            mock_settings.KNOWLEDGE_SUMMARY_ENABLED = False
            mock_settings.KNOWLEDGE_SUMMARY_MODEL_TYPE = "GROQ"
            mock_settings.KNOWLEDGE_SUMMARY_MODEL_NAME = "llama-3.1-8b-instant"
            mock_settings.KNOWLEDGE_SUMMARY_API_KEY = ""
            mock_settings.KNOWLEDGE_SUMMARY_MAX_TOKENS = 4000

            summarizer = ContentSummarizer()

            content = "This is test content with a URL: https://example.com/product/123"
            result = summarizer.summarize(content, "https://example.com")

            assert result == content

    def test_summarize_short_content(self):
        """Test that short content is not summarized"""
        with patch('app.knowledge.content_summarizer.settings') as mock_settings:
            mock_settings.KNOWLEDGE_SUMMARY_ENABLED = True
            mock_settings.KNOWLEDGE_SUMMARY_MODEL_TYPE = "GROQ"
            mock_settings.KNOWLEDGE_SUMMARY_MODEL_NAME = "llama-3.1-8b-instant"
            mock_settings.KNOWLEDGE_SUMMARY_API_KEY = "test_api_key"
            mock_settings.KNOWLEDGE_SUMMARY_MAX_TOKENS = 4000

            summarizer = ContentSummarizer()

            # Content under 1000 chars
            content = "Short content with URL: https://example.com/product/123"
            result = summarizer.summarize(content, "https://example.com")

            assert result == content

    def test_summarize_preserves_urls(self):
        """Test that URLs are preserved in summarization"""
        with patch('app.knowledge.content_summarizer.settings') as mock_settings, \
             patch('app.knowledge.content_summarizer.create_model') as mock_create_model:
            mock_settings.KNOWLEDGE_SUMMARY_ENABLED = True
            mock_settings.KNOWLEDGE_SUMMARY_MODEL_TYPE = "GROQ"
            mock_settings.KNOWLEDGE_SUMMARY_MODEL_NAME = "llama-3.1-8b-instant"
            mock_settings.KNOWLEDGE_SUMMARY_API_KEY = "test_api_key"
            mock_settings.KNOWLEDGE_SUMMARY_MAX_TOKENS = 4000
            mock_settings.ENVIRONMENT = "development"

            # Mock the model
            mock_model = MagicMock()
            mock_create_model.return_value = mock_model

            # Create mock response with URLs preserved
            mock_response = MagicMock()
            mock_response.content = "Summary of the product. Check out the product at https://example.com/product/123 and related items at https://example.com/category/products"

            # Mock the agent and its run method
            mock_agent = MagicMock()
            mock_agent.run.return_value = mock_response

            summarizer = ContentSummarizer()

            # Override the agent with our mock
            with patch('app.knowledge.content_summarizer.Agent', return_value=mock_agent):
                # Get the agent to initialize it
                summarizer._get_agent()

                # Long content with multiple URLs
                content = """
                This is a long piece of content about our products.
                We have many great products available at https://example.com/product/123
                and you can find more information at https://example.com/category/products.
                Our documentation is available at https://docs.example.com/guide
                and images can be found at https://cdn.example.com/images/product.jpg.
                """ * 50  # Make it long enough to trigger summarization

                result = summarizer.summarize(content, "https://example.com")

                # Verify URLs are in the result
                assert "https://example.com/product/123" in result
                assert "https://example.com/category/products" in result

    def test_summarize_adds_source_url(self):
        """Test that source URL is added if not present"""
        with patch('app.knowledge.content_summarizer.settings') as mock_settings, \
             patch('app.knowledge.content_summarizer.create_model') as mock_create_model:
            mock_settings.KNOWLEDGE_SUMMARY_ENABLED = True
            mock_settings.KNOWLEDGE_SUMMARY_MODEL_TYPE = "GROQ"
            mock_settings.KNOWLEDGE_SUMMARY_MODEL_NAME = "llama-3.1-8b-instant"
            mock_settings.KNOWLEDGE_SUMMARY_API_KEY = "test_api_key"
            mock_settings.KNOWLEDGE_SUMMARY_MAX_TOKENS = 4000
            mock_settings.ENVIRONMENT = "development"

            # Mock the model
            mock_model = MagicMock()
            mock_create_model.return_value = mock_model

            # Create mock response without source URL
            mock_response = MagicMock()
            mock_response.content = "Summary of the product without source URL"

            # Mock the agent and its run method
            mock_agent = MagicMock()
            mock_agent.run.return_value = mock_response

            summarizer = ContentSummarizer()

            # Override the agent with our mock
            with patch('app.knowledge.content_summarizer.Agent', return_value=mock_agent):
                # Get the agent to initialize it
                summarizer._get_agent()

                # Long content
                content = "This is a long piece of content about our products. " * 100

                result = summarizer.summarize(content, "https://example.com/products")

                # Verify source URL is added
                assert "Source: https://example.com/products" in result

    def test_summarize_error_handling(self):
        """Test that errors are handled gracefully and original content is returned"""
        with patch('app.knowledge.content_summarizer.settings') as mock_settings, \
             patch('app.knowledge.content_summarizer.create_model') as mock_create_model:
            mock_settings.KNOWLEDGE_SUMMARY_ENABLED = True
            mock_settings.KNOWLEDGE_SUMMARY_MODEL_TYPE = "GROQ"
            mock_settings.KNOWLEDGE_SUMMARY_MODEL_NAME = "llama-3.1-8b-instant"
            mock_settings.KNOWLEDGE_SUMMARY_API_KEY = "test_api_key"
            mock_settings.KNOWLEDGE_SUMMARY_MAX_TOKENS = 4000
            mock_settings.ENVIRONMENT = "development"

            # Mock the model to raise an error
            mock_create_model.side_effect = Exception("API Error")

            summarizer = ContentSummarizer()

            # Long content
            content = "This is a long piece of content with URL: https://example.com/product/123 " * 100

            result = summarizer.summarize(content, "https://example.com")

            # Verify original content is returned on error
            assert result == content

    def test_get_content_summarizer_singleton(self):
        """Test that get_content_summarizer returns a singleton instance"""
        with patch('app.knowledge.content_summarizer.settings') as mock_settings:
            mock_settings.KNOWLEDGE_SUMMARY_ENABLED = True
            mock_settings.KNOWLEDGE_SUMMARY_MODEL_TYPE = "GROQ"
            mock_settings.KNOWLEDGE_SUMMARY_MODEL_NAME = "llama-3.1-8b-instant"
            mock_settings.KNOWLEDGE_SUMMARY_API_KEY = "test_api_key"
            mock_settings.KNOWLEDGE_SUMMARY_MAX_TOKENS = 4000

            # Reset the global instance
            import app.knowledge.content_summarizer
            app.knowledge.content_summarizer._summarizer = None

            # Get the instance twice
            instance1 = get_content_summarizer()
            instance2 = get_content_summarizer()

            # Verify it's the same instance
            assert instance1 is instance2

    def test_summarizer_instructions_include_url_preservation(self):
        """Test that the summarizer instructions emphasize URL preservation"""
        with patch('app.knowledge.content_summarizer.settings') as mock_settings, \
             patch('app.knowledge.content_summarizer.create_model') as mock_create_model, \
             patch('app.knowledge.content_summarizer.Agent') as mock_agent_class:
            mock_settings.KNOWLEDGE_SUMMARY_ENABLED = True
            mock_settings.KNOWLEDGE_SUMMARY_MODEL_TYPE = "GROQ"
            mock_settings.KNOWLEDGE_SUMMARY_MODEL_NAME = "llama-3.1-8b-instant"
            mock_settings.KNOWLEDGE_SUMMARY_API_KEY = "test_api_key"
            mock_settings.KNOWLEDGE_SUMMARY_MAX_TOKENS = 4000
            mock_settings.ENVIRONMENT = "development"

            # Mock the model
            mock_model = MagicMock()
            mock_create_model.return_value = mock_model

            # Mock the agent
            mock_agent_instance = MagicMock()
            mock_agent_class.return_value = mock_agent_instance

            summarizer = ContentSummarizer()
            summarizer._get_agent()

            # Verify Agent was called with instructions containing URL preservation
            assert mock_agent_class.called
            call_kwargs = mock_agent_class.call_args.kwargs
            instructions = call_kwargs['instructions']

            # Check that instructions emphasize URL preservation
            assert 'PRESERVING ALL URLs' in instructions
            assert 'Product URLs' in instructions
            assert 'DO NOT remove, shorten, or modify ANY URLs' in instructions


class TestChatAgentURLInstructions:
    """Test suite for verifying chat agent includes URL instructions"""

    def test_chat_agent_includes_url_instructions(self):
        """Test that chat agent instructions include URL preservation"""
        from app.agents.chat_agent import ChatAgent
        from uuid import uuid4

        # Mock all database and external dependencies
        with patch('app.agents.chat_agent.SessionLocal') as mock_session_local, \
             patch('app.tools.knowledge_search_byagent.SessionLocal') as mock_knowledge_session_local, \
             patch('app.agents.chat_agent.JiraRepository') as mock_jira_repo, \
             patch('app.agents.chat_agent.AgentShopifyConfigRepository') as mock_shopify_repo, \
             patch('app.repositories.lead_capture.LeadCaptureConfigRepository') as mock_lead_repo, \
             patch('app.agents.chat_agent.EncryptedPostgresAgentStorage') as mock_storage, \
             patch('app.agents.chat_agent.create_model') as mock_create_model, \
             patch('app.agents.chat_agent.Agent') as mock_agent_class:

            # No lead-capture config for this agent (returns None → capture off).
            mock_lead_repo.return_value.get_by_agent.return_value = None

            # Mock database session
            mock_db = MagicMock()
            mock_session_local.return_value.__enter__.return_value = mock_db
            mock_session_local.return_value.__exit__.return_value = None

            # Mock knowledge search database session
            mock_knowledge_session_local.return_value.__enter__.return_value = mock_db
            mock_knowledge_session_local.return_value.__exit__.return_value = None

            # Mock Jira repository
            from app.models.schemas.jira import AgentWithJiraConfig
            from app.models.agent import AgentType

            mock_agent_data = AgentWithJiraConfig(
                id=uuid4(),
                name="Test Agent",
                display_name="Test Agent",
                description="Test",
                instructions=["You are a helpful assistant"],
                tools=[],
                agent_type=AgentType.CUSTOMER_SUPPORT,
                is_default=False,
                is_active=True,
                organization_id=uuid4(),
                transfer_to_human=False,
                ask_for_rating=False,
                knowledge=[],
                jira_enabled=False,
                jira_project_key=None,
                jira_issue_type_id=None,
                groups=[],
                organization=None
            )

            mock_jira_repo.return_value.get_agent_with_jira_config.return_value = mock_agent_data
            mock_shopify_repo.return_value.get_agent_shopify_config.return_value = None

            # Mock storage and model
            mock_storage.return_value = MagicMock()
            mock_create_model.return_value = MagicMock()
            mock_agent_instance = MagicMock()
            mock_agent_class.return_value = mock_agent_instance

            # Create chat agent
            ChatAgent(
                api_key="test_key",
                model_name="gpt-4",
                model_type="OPENAI",
                org_id=str(uuid4()),
                agent_id=str(mock_agent_data.id),
                session_id=str(uuid4())
            )

            # Verify Agent was called with instructions containing URL guidance
            assert mock_agent_class.called
            call_kwargs = mock_agent_class.call_args.kwargs
            instructions = call_kwargs['instructions']

            # Check that instructions include URL preservation guidance
            assert 'Include URLs in Responses' in instructions or 'MUST include these URLs' in instructions
            assert 'URLs' in instructions