"""M6 — further hosts tests.

Windows host: MiniApps open in floating windows (frontend — covered by
vitest). AI agent host: the core tool ``send_miniapp`` lets agents embed a
MiniApp as an output block in their chat (approval_request precedent from
agent_loop), permission-checked fail-closed against the calling user.
"""

from __future__ import annotations

import inspect

import pytest

from app.ai.tool_registry import get_tool_registry


@pytest.fixture(autouse=True)
def _clean_registries():
    from app.plugins.miniapp_registry import reset_miniapp_registry

    reset_miniapp_registry()
    yield
    reset_miniapp_registry()
    get_tool_registry()._tools.pop("send_miniapp", None)


def _ctx(**overrides) -> dict:
    # db is always present in production tool contexts (agent_loop passes
    # the session); a plain object() stands in for tests where the handler
    # only forwards it to mocked collaborators.
    ctx = {
        "db": object(),
        "tenant_id": "00000000-0000-0000-0000-000000000001",
        "user_id": "00000000-0000-0000-0000-000000000002",
        "agent_name": "TestAgent",
    }
    ctx.update(overrides)
    return ctx


class TestSendMiniAppToolRegistration:
    def test_register_registers_tool(self):
        from app.ai.miniapp_tools import register_miniapp_tools

        register_miniapp_tools()
        tool = get_tool_registry().get("send_miniapp")
        assert tool is not None
        assert tool.plugin_name == "system"
        assert tool.category == "ui"
        # App id is the only required parameter
        props = tool.parameters.get("properties", {})
        assert "app_id" in props
        assert tool.parameters.get("required") == ["app_id"]


class TestSendMiniAppHandler:
    async def test_unknown_app_returns_error(self):
        from app.ai.miniapp_tools import _send_miniapp_handler

        result = await _send_miniapp_handler({"app_id": "no_such_app"}, _ctx())
        assert "not found" in result.lower()

    async def test_unknown_app_never_touches_chat(self, monkeypatch):
        """Fail-closed: unknown app must not post anything anywhere."""
        from app.ai import miniapp_tools

        called = []
        monkeypatch.setattr(
            miniapp_tools, "_get_komm_contract", lambda: (_ for _ in ()).throw(AssertionError("must not be called"))
        )
        from app.ai.miniapp_tools import _send_miniapp_handler

        await _send_miniapp_handler({"app_id": "nope"}, _ctx())
        assert called == []

    async def test_permission_denied_returns_error(self, monkeypatch):
        """User without the app permission cannot make the agent send it."""
        from app.ai import miniapp_tools
        from app.plugins.miniapp_registry import get_miniapp_registry

        get_miniapp_registry().register(
            app_id="tasks_widget", name="Tasks", plugin_name="tasks",
            permission="tasks:read", component="@/components/x",
        )

        async def fake_resolve(db, user_id, tenant_id):
            return {"permissions": set(), "denied": set(), "is_system_admin": False}

        monkeypatch.setattr(miniapp_tools, "resolve_permissions", fake_resolve)
        monkeypatch.setattr(
            miniapp_tools, "_get_komm_contract", lambda: (_ for _ in ()).throw(AssertionError("must not post"))
        )
        from app.ai.miniapp_tools import _send_miniapp_handler

        result = await _send_miniapp_handler({"app_id": "tasks_widget"}, _ctx())
        assert "permission" in result.lower()

    async def test_posts_miniapp_block_to_agent_room(self, monkeypatch):
        """Happy path: block with app_id + settings lands in the agent room."""
        from app.ai import miniapp_tools
        from app.plugins.miniapp_registry import get_miniapp_registry

        get_miniapp_registry().register(
            app_id="open_widget", name="Open", plugin_name="test",
            permission="", component="@/components/x",
        )

        async def fake_resolve(db, user_id, tenant_id):
            return {"permissions": {"*:*"}, "denied": set(), "is_system_admin": True}

        posted: list[dict] = []

        class FakeKomm:
            async def find_locked_room_id(self, db, tenant_id, plugin_name, title):
                assert plugin_name == "automation"
                assert title == "Agent: TestAgent"
                return "conv-123"

            async def send_message(self, **kwargs):
                posted.append(kwargs)

        monkeypatch.setattr(miniapp_tools, "resolve_permissions", fake_resolve)
        monkeypatch.setattr(miniapp_tools, "_get_komm_contract", lambda: FakeKomm())
        from app.ai.miniapp_tools import _send_miniapp_handler

        result = await _send_miniapp_handler(
            {"app_id": "open_widget", "settings": {"limit": 5}}, _ctx()
        )
        assert "sent" in result.lower() or "success" in result.lower()
        assert len(posted) == 1
        msg = posted[0]
        assert msg["conversation_id"] == "conv-123"
        assert msg["sender_type"] == "agent"
        blocks = msg["blocks"]
        assert len(blocks) == 1
        assert blocks[0]["block_type"] == "miniapp"
        assert blocks[0]["block_data"]["app_id"] == "open_widget"
        assert blocks[0]["block_data"]["config"] == {"limit": 5}

    async def test_missing_room_degrades_gracefully(self, monkeypatch):
        """No agent chat room -> informative result, no crash."""
        from app.ai import miniapp_tools
        from app.plugins.miniapp_registry import get_miniapp_registry

        get_miniapp_registry().register(
            app_id="open_widget", name="Open", plugin_name="test", permission=""
        )

        async def fake_resolve(db, user_id, tenant_id):
            return {"permissions": set(), "denied": set(), "is_system_admin": True}

        class FakeKomm:
            async def find_locked_room_id(self, db, tenant_id, plugin_name, title):
                return None

        monkeypatch.setattr(miniapp_tools, "resolve_permissions", fake_resolve)
        monkeypatch.setattr(miniapp_tools, "_get_komm_contract", lambda: FakeKomm())
        from app.ai.miniapp_tools import _send_miniapp_handler

        result = await _send_miniapp_handler({"app_id": "open_widget"}, _ctx())
        assert "room" in result.lower() or "chat" in result.lower()


class TestAgentLoopContext:
    def test_tool_context_carries_agent_name(self):
        """agent_loop must pass the agent's name so tools can find the room."""
        from app.ai import agent_loop

        src = inspect.getsource(agent_loop)
        assert '"agent_name"' in src, "tool_context must include agent_name"


def test_agents_tools_route_uses_list_for_api():
    """M6 verification blocker fixed: /api/v1/agents/tools used to call
    registry.list_tools() (nonexistent — 500 on production, pre-existing).
    The route must use list_for_api() with the correct field mapping.
    """
    import inspect

    from app.plugins.builtins.automation.agent_routes import list_tools

    src = inspect.getsource(list_tools)
    assert "list_for_api()" in src, "route must use list_for_api()"
    assert "list_tools()" not in src.replace("list_for_api()", "")