"""
MCP (Model Context Protocol) tests for Response API.

Tests MCP tool calling in both streaming and non-streaming modes.
These tests should work across all backends that support MCP (OpenAI, XAI).
"""

import json

from basic_crud import ResponseAPIBaseTest


class MCPTests(ResponseAPIBaseTest):
    """Tests for MCP tool calling in both streaming and non-streaming modes."""

    # Class attribute to control validation strictness
    # Subclasses can override this to enable strict validation
    mcp_validation_mode = "relaxed"

    # Shared constants for MCP tests
    BRAVE_MCP_TOOL = {
        "type": "mcp",
        "server_label": "brave",
        "server_description": "A Tool to do web search",
        "server_url": "http://localhost:8001/sse",
        "require_approval": "never",
    }

    MCP_TEST_PROMPT = (
        "show me some news about sglang router, use the tool to just search "
        "one result and return one sentence response"
    )

    GET_WEATHER_FUNCTION = {
        "type": "function",
        "name": "get_weather",
        "description": "Get the current weather in a given location",
        "parameters": {
            "type": "object",
            "properties": {"location": {"type": "string"}},
            "required": ["location"],
        },
    }

    def test_mcp_basic_tool_call(self):
        """Test basic MCP tool call (non-streaming).

        Validation strictness is controlled by the class attribute `mcp_validation_mode`.
        Set to "strict" in subclasses for additional HTTP-specific validation.
        """
        resp = self.create_response(
            self.MCP_TEST_PROMPT,
            tools=[self.BRAVE_MCP_TOOL],
            stream=False,
            reasoning={"effort": "low"},
        )

        # Should successfully make the request
        self.assertEqual(resp.status_code, 200)

        data = resp.json()

        # Basic response structure
        self.assertIn("id", data)
        self.assertIn("status", data)
        self.assertEqual(data["status"], "completed")
        self.assertIn("output", data)
        self.assertIn("model", data)

        # Verify output array is not empty
        output = data["output"]
        self.assertIsInstance(output, list)
        self.assertGreater(len(output), 0)

        # Check for MCP-specific output types
        output_types = [item.get("type") for item in output]

        # Should have mcp_list_tools - tools are listed before calling
        self.assertIn(
            "mcp_list_tools", output_types, "Response should contain mcp_list_tools"
        )

        # Should have at least one mcp_call
        mcp_calls = [item for item in output if item.get("type") == "mcp_call"]
        self.assertGreater(
            len(mcp_calls), 0, "Response should contain at least one mcp_call"
        )

        # Verify mcp_call structure
        for mcp_call in mcp_calls:
            self.assertIn("id", mcp_call)
            self.assertIn("status", mcp_call)
            self.assertEqual(mcp_call["status"], "completed")
            self.assertIn("server_label", mcp_call)
            self.assertEqual(mcp_call["server_label"], "brave")
            self.assertIn("name", mcp_call)
            self.assertIn("arguments", mcp_call)
            self.assertIn("output", mcp_call)

        # Strict mode: additional validation for HTTP backends
        if self.mcp_validation_mode == "strict":
            # Should have final message output
            messages = [item for item in output if item.get("type") == "message"]
            self.assertGreater(
                len(messages), 0, "Response should contain at least one message"
            )
            # Verify message structure
            for msg in messages:
                self.assertIn("content", msg)
                self.assertIsInstance(msg["content"], list)

                # Check content has text
                for content_item in msg["content"]:
                    if content_item.get("type") == "output_text":
                        self.assertIn("text", content_item)
                        self.assertIsInstance(content_item["text"], str)
                        self.assertGreater(len(content_item["text"]), 0)

    def test_mcp_basic_tool_call_streaming(self):
        """Test basic MCP tool call (streaming).

        Validation strictness is controlled by the class attribute `mcp_validation_mode`.
        Set to "strict" in subclasses for additional HTTP-specific validation.
        """
        resp = self.create_response(
            self.MCP_TEST_PROMPT,
            tools=[self.BRAVE_MCP_TOOL],
            stream=True,
            reasoning={"effort": "low"},
        )

        # Should successfully make the request
        self.assertEqual(resp.status_code, 200)

        events = self.parse_sse_events(resp)
        self.assertGreater(len(events), 0)

        event_types = [e.get("event") for e in events]

        # Check for lifecycle events
        self.assertIn(
            "response.created", event_types, "Should have response.created event"
        )
        self.assertIn(
            "response.completed", event_types, "Should have response.completed event"
        )

        # Check for MCP list tools events
        self.assertIn(
            "response.output_item.added",
            event_types,
            "Should have output_item.added events",
        )
        self.assertIn(
            "response.mcp_list_tools.in_progress",
            event_types,
            "Should have mcp_list_tools.in_progress event",
        )
        self.assertIn(
            "response.mcp_list_tools.completed",
            event_types,
            "Should have mcp_list_tools.completed event",
        )

        # Check for MCP call events
        self.assertIn(
            "response.mcp_call.in_progress",
            event_types,
            "Should have mcp_call.in_progress event",
        )
        self.assertIn(
            "response.mcp_call_arguments.delta",
            event_types,
            "Should have mcp_call_arguments.delta event",
        )
        self.assertIn(
            "response.mcp_call_arguments.done",
            event_types,
            "Should have mcp_call_arguments.done event",
        )
        self.assertIn(
            "response.mcp_call.completed",
            event_types,
            "Should have mcp_call.completed event",
        )

        # Verify final completed event has full response
        completed_events = [e for e in events if e.get("event") == "response.completed"]
        self.assertEqual(len(completed_events), 1)

        final_response = completed_events[0].get("data", {}).get("response", {})
        self.assertIn("id", final_response)
        self.assertEqual(final_response.get("status"), "completed")
        self.assertIn("output", final_response)

        # Verify final output contains expected items
        final_output = final_response.get("output", [])
        final_output_types = [item.get("type") for item in final_output]

        self.assertIn("mcp_list_tools", final_output_types)
        self.assertIn("mcp_call", final_output_types)

        # Verify mcp_call items in final output
        mcp_calls = [item for item in final_output if item.get("type") == "mcp_call"]
        self.assertGreater(len(mcp_calls), 0)

        for mcp_call in mcp_calls:
            self.assertEqual(mcp_call.get("status"), "completed")
            self.assertEqual(mcp_call.get("server_label"), "brave")
            self.assertIn("name", mcp_call)
            self.assertIn("arguments", mcp_call)
            self.assertIn("output", mcp_call)

        # Strict mode: additional validation for HTTP backends
        if self.mcp_validation_mode == "strict":
            # Check for text output events
            self.assertIn(
                "response.content_part.added",
                event_types,
                "Should have content_part.added event",
            )
            self.assertIn(
                "response.output_text.delta",
                event_types,
                "Should have output_text.delta events",
            )
            self.assertIn(
                "response.output_text.done",
                event_types,
                "Should have output_text.done event",
            )
            self.assertIn(
                "response.content_part.done",
                event_types,
                "Should have content_part.done event",
            )

            self.assertIn("message", final_output_types)

            # Verify text deltas combine to final message
            text_deltas = [
                e.get("data", {}).get("delta", "")
                for e in events
                if e.get("event") == "response.output_text.delta"
            ]
            self.assertGreater(len(text_deltas), 0, "Should have text deltas")

            # Get final text from output_text.done event
            text_done_events = [
                e for e in events if e.get("event") == "response.output_text.done"
            ]
            self.assertGreater(len(text_done_events), 0)

            final_text = text_done_events[0].get("data", {}).get("text", "")
            self.assertGreater(len(final_text), 0, "Final text should not be empty")

    def test_mixed_mcp_and_function_tools(self):
        """Test mixed MCP and function tools (non-streaming)."""
        resp = self.create_response(
            "What is the weather in seattle now?",
            tools=[self.BRAVE_MCP_TOOL, self.GET_WEATHER_FUNCTION],
            stream=False,
            tool_choice="auto",
        )

        # Should successfully make the request
        self.assertEqual(resp.status_code, 200)

        data = resp.json()

        # Basic response structure
        self.assertIn("id", data)
        self.assertIn("status", data)
        self.assertIn("output", data)

        # Verify output array is not empty
        output = data["output"]
        self.assertIsInstance(output, list)
        self.assertGreater(len(output), 0)

        # Check for function_call (not mcp_call for get_weather)
        function_calls = [
            item for item in output if item.get("type") == "function_call"
        ]
        self.assertGreater(
            len(function_calls), 0, "Response should contain at least one function_call"
        )

        # Verify function_call structure for get_weather
        weather_call = function_calls[0]
        self.assertIn("name", weather_call)
        self.assertEqual(weather_call["name"], "get_weather")
        self.assertIn("call_id", weather_call)
        self.assertIn("arguments", weather_call)
        self.assertIn("status", weather_call)

        # Parse and verify arguments
        args = json.loads(weather_call["arguments"])
        self.assertIn("location", args)
        self.assertIn("seattle", args["location"].lower())

    def test_mixed_mcp_and_function_tools_streaming(self):
        """Test mixed MCP and function tools (streaming)."""
        resp = self.create_response(
            "What is the weather in seattle now?",
            tools=[self.BRAVE_MCP_TOOL, self.GET_WEATHER_FUNCTION],
            stream=True,
            tool_choice="auto",  # Encourage tool usage
        )

        # Should successfully make the request
        self.assertEqual(resp.status_code, 200)

        events = self.parse_sse_events(resp)
        self.assertGreater(len(events), 0)

        event_types = [e.get("event") for e in events]

        # Check for lifecycle events
        self.assertIn(
            "response.created", event_types, "Should have response.created event"
        )

        # Should have mcp_list_tools events
        self.assertIn(
            "response.mcp_list_tools.completed",
            event_types,
            "Should have mcp_list_tools.completed event",
        )

        # Should have function_call_arguments events (not mcp_call_arguments)
        self.assertIn(
            "response.function_call_arguments.delta",
            event_types,
            "Should have function_call_arguments.delta event for function tools",
        )
        self.assertIn(
            "response.function_call_arguments.done",
            event_types,
            "Should have function_call_arguments.done event for function tools",
        )

        # Should NOT have mcp_call_arguments events for function tools
        # (get_weather should use function_call_arguments, not mcp_call_arguments)
        mcp_call_arg_events = [
            e
            for e in events
            if e.get("event") == "response.mcp_call_arguments.delta"
            and "get_weather" in str(e.get("data", {}))
        ]
        self.assertEqual(
            len(mcp_call_arg_events),
            0,
            "Should NOT emit mcp_call_arguments.delta for function tools (get_weather)",
        )

        # Verify function_call_arguments.delta event structure
        func_arg_deltas = [
            e
            for e in events
            if e.get("event") == "response.function_call_arguments.delta"
        ]
        self.assertGreater(
            len(func_arg_deltas), 0, "Should have function_call_arguments.delta events"
        )

        # Check that at least one delta event contains location arguments
        has_location = False
        for event in func_arg_deltas:
            data = event.get("data", {})
            delta = data.get("delta", "")
            if "location" in delta.lower() or "seattle" in delta.lower():
                has_location = True
                break

        self.assertTrue(
            has_location,
            "function_call_arguments.delta should contain location/seattle",
        )