"""Regression tests for stream consumer thread/topic routing fix.

Verifies that GatewayStreamConsumer correctly passes reply_to on the first
message send, ensuring messages land in the correct topic/thread instead of
the main group chat.

Covers: #6969, #9916, #7355
"""
from unittest.mock import AsyncMock, MagicMock
from types import SimpleNamespace

import pytest

from gateway.stream_consumer import (
    GatewayStreamConsumer,
)


def _make_adapter(send_result=None, edit_result=None, max_length=4096):
    adapter = MagicMock()
    adapter.send = AsyncMock(
        return_value=send_result or SimpleNamespace(success=True, message_id="msg_1")
    )
    adapter.edit_message = AsyncMock(
        return_value=edit_result or SimpleNamespace(success=True)
    )
    adapter.MAX_MESSAGE_LENGTH = max_length
    return adapter


class TestInitialReplyToId:
    """Verify initial_reply_to_id is passed as reply_to on first send."""

    @pytest.mark.asyncio
    async def test_first_send_uses_initial_reply_to_id(self):
        """When initial_reply_to_id is set, first adapter.send() should
        include reply_to=initial_reply_to_id."""
        adapter = _make_adapter()
        consumer = GatewayStreamConsumer(
            adapter,
            "chat_123",
            metadata={"thread_id": "omt_topic123"},
            initial_reply_to_id="om_user_msg_456",
        )
        await consumer._send_or_edit("Hello world")

        adapter.send.assert_called_once()
        call_kwargs = adapter.send.call_args[1]
        assert call_kwargs["reply_to"] == "om_user_msg_456", (
            "First send should pass initial_reply_to_id as reply_to"
        )
        assert call_kwargs["chat_id"] == "chat_123"

    @pytest.mark.asyncio
    async def test_first_send_without_initial_reply_to_id(self):
        """When initial_reply_to_id is None, first send should have
        reply_to=None (backward compatible)."""
        adapter = _make_adapter()
        consumer = GatewayStreamConsumer(
            adapter,
            "chat_123",
        )
        await consumer._send_or_edit("Hello world")

        adapter.send.assert_called_once()
        call_kwargs = adapter.send.call_args[1]
        assert call_kwargs.get("reply_to") is None

    @pytest.mark.asyncio
    async def test_subsequent_edits_ignore_initial_reply_to_id(self):
        """After first send, edits should use message_id, not initial_reply_to_id."""
        adapter = _make_adapter()
        consumer = GatewayStreamConsumer(
            adapter,
            "chat_123",
            metadata={"thread_id": "omt_topic123"},
            initial_reply_to_id="om_user_msg_456",
        )

        # First send
        await consumer._send_or_edit("Hello world")
        assert adapter.send.call_count == 1

        # Second call should edit, not send
        await consumer._send_or_edit("Hello world updated")
        assert adapter.send.call_count == 1, "Should edit, not send again"
        adapter.edit_message.assert_called_once()
        edit_kwargs = adapter.edit_message.call_args[1]
        assert edit_kwargs["message_id"] == "msg_1"
        assert edit_kwargs["chat_id"] == "chat_123"

    @pytest.mark.asyncio
    async def test_metadata_passed_on_first_send(self):
        """Metadata (containing thread_id) should be forwarded on first send."""
        adapter = _make_adapter()
        metadata = {"thread_id": "omt_topic789"}
        consumer = GatewayStreamConsumer(
            adapter,
            "chat_123",
            metadata=metadata,
            initial_reply_to_id="om_msg_000",
        )
        await consumer._send_or_edit("Test")

        call_kwargs = adapter.send.call_args[1]
        assert call_kwargs["metadata"] == {**metadata, "expect_edits": True}
        assert metadata == {"thread_id": "omt_topic789"}


class TestOverflowFirstMessage:
    """Verify thread routing is preserved when the first message overflows."""

    @pytest.mark.asyncio
    async def test_overflow_first_send_uses_initial_reply_to_id(self):
        """When first message exceeds platform limit and is split into chunks,
        each chunk should be threaded to initial_reply_to_id, not None."""
        adapter = _make_adapter(max_length=10)
        adapter.truncate_message = MagicMock(
            return_value=["chunk_1", "chunk_2"]
        )
        consumer = GatewayStreamConsumer(
            adapter,
            "chat_123",
            metadata={"thread_id": "omt_topic123"},
            initial_reply_to_id="om_user_msg_789",
        )

        # Inject oversized accumulated text to trigger overflow path
        consumer._accumulated = "A" * 100
        consumer._current_edit_interval = 999
        await consumer._send_new_chunk("chunk_1", consumer._message_id or consumer._initial_reply_to_id)

        adapter.send.assert_called_once()
        call_kwargs = adapter.send.call_args[1]
        assert call_kwargs["reply_to"] == "om_user_msg_789", (
            "Overflow first chunk should use initial_reply_to_id"
        )


class TestFeishuFallbackThreadRouting:
    """Verify FeishuAdapter._send_raw_message routes to topic on fallback."""

    @pytest.mark.asyncio
    async def test_create_uses_thread_id_when_available(self):
        """When reply_to=None and metadata has thread_id, message.create
        should use receive_id_type='thread_id'."""
        from gateway.platforms.feishu import FeishuAdapter

        # We test the _send_raw_message method directly by mocking the client
        adapter = MagicMock(spec=FeishuAdapter)

        # Set up the real _send_raw_message logic manually
        mock_client = MagicMock()
        mock_create_response = SimpleNamespace(
            success=lambda: True,
            data=SimpleNamespace(message_id="new_msg_1"),
        )
        mock_client.im.v1.message.create = MagicMock(return_value=mock_create_response)

        # Use the real implementation path
        adapter._client = mock_client
        adapter._build_create_message_body = FeishuAdapter._build_create_message_body
        adapter._build_create_message_request = FeishuAdapter._build_create_message_request

        # Call _send_raw_message with reply_to=None and thread_id in metadata
        import json
        result = await FeishuAdapter._send_raw_message(
            adapter,
            chat_id="oc_main_chat",
            msg_type="text",
            payload=json.dumps({"text": "hello"}),
            reply_to=None,
            metadata={"thread_id": "omt_topic_abc"},
        )

        # Verify message.create was called (not message.reply)
        mock_client.im.v1.message.create.assert_called_once()

        # The request should have receive_id_type="thread_id"
        call_args = mock_client.im.v1.message.create.call_args[0][0]
        # Lark SDK builder exposes .body; the in-tree fallback exposes .request_body.
        # The contributor's branch had the lark SDK installed, the test environment
        # may not — handle both shapes.
        body = getattr(call_args, "body", None) or getattr(call_args, "request_body", None)
        assert body is not None, "request has neither .body nor .request_body"
        # receive_id should be the thread_id, not the chat_id
        receive_id = getattr(body, "receive_id", None)
        if receive_id is None and isinstance(body, str):
            import json as _json
            receive_id = _json.loads(body).get("receive_id")
        assert receive_id == "omt_topic_abc", (
            f"Expected receive_id='omt_topic_abc', got '{receive_id}'"
        )
        # And receive_id_type must be 'thread_id', not 'chat_id'
        receive_id_type = getattr(call_args, "receive_id_type", None)
        assert receive_id_type == "thread_id", (
            f"Expected receive_id_type='thread_id', got '{receive_id_type}'"
        )

    @pytest.mark.asyncio
    async def test_create_uses_chat_id_when_no_thread(self):
        """When reply_to=None and metadata has no thread_id, message.create
        should use receive_id_type='chat_id' (original behavior)."""
        from gateway.platforms.feishu import FeishuAdapter

        mock_client = MagicMock()
        mock_create_response = SimpleNamespace(
            success=lambda: True,
            data=SimpleNamespace(message_id="new_msg_1"),
        )
        mock_client.im.v1.message.create = MagicMock(return_value=mock_create_response)

        adapter = MagicMock(spec=FeishuAdapter)
        adapter._client = mock_client
        adapter._build_create_message_body = FeishuAdapter._build_create_message_body
        adapter._build_create_message_request = FeishuAdapter._build_create_message_request

        import json
        result = await FeishuAdapter._send_raw_message(
            adapter,
            chat_id="oc_main_chat",
            msg_type="text",
            payload=json.dumps({"text": "hello"}),
            reply_to=None,
            metadata=None,
        )

        mock_client.im.v1.message.create.assert_called_once()
