"""Tests for ``alfred.agent.registry`` — tool registration and JSON schema gen.

Two suites:

1. **TestCreateToolFromFunction** — Unit-tests the schema extraction from a
   bare Python function: name resolution, docstring → description, required
   versus optional parameters, ``Optional[X]`` / ``X | None`` stripping, and
   the Python-to-JSON-Schema type mapping (``str/int/float/bool/list/dict``
   → ``string/integer/number/boolean/array/object``).

2. **TestMakeTools** — Integration check on the live registry: every tool
   declared in ``make_tools(settings)`` is a real ``Tool`` instance with a
   callable ``func`` and a name matching its dict key, and a known core set
   of tools is always present. Resolver tests target the four media-typed
   resolvers (``resolve_movie_destination``, ``_season_``, ``_episode_``,
   ``_series_``), not the legacy unified ``resolve_destination`` which no
   longer exists.
"""

from alfred.agent.registry import Tool, _create_tool_from_function, make_tools
from alfred.settings import settings

# ---------------------------------------------------------------------------
# _create_tool_from_function
# ---------------------------------------------------------------------------


class TestCreateToolFromFunction:
    def test_name_from_function(self):
        def my_tool(x: str) -> dict:
            """Does something."""
            return {}

        tool = _create_tool_from_function(my_tool)
        assert tool.name == "my_tool"

    def test_description_from_docstring_first_line(self):
        def my_tool(x: str) -> dict:
            """First line description.

            More details here.
            """
            return {}

        tool = _create_tool_from_function(my_tool)
        assert tool.description == "First line description."

    def test_description_fallback_to_name(self):
        def no_doc(x: str) -> dict:
            return {}

        tool = _create_tool_from_function(no_doc)
        assert tool.description == "no_doc"

    def test_required_params_without_default(self):
        def tool(a: str, b: int) -> dict:
            """Tool."""
            return {}

        t = _create_tool_from_function(tool)
        assert "a" in t.parameters["required"]
        assert "b" in t.parameters["required"]

    def test_optional_params_not_required(self):
        def tool(a: str, b: str = "default") -> dict:
            """Tool."""
            return {}

        t = _create_tool_from_function(tool)
        assert "a" in t.parameters["required"]
        assert "b" not in t.parameters["required"]

    def test_none_default_not_required(self):
        def tool(a: str, b: str | None = None) -> dict:
            """Tool."""
            return {}

        t = _create_tool_from_function(tool)
        assert "b" not in t.parameters["required"]

    def test_type_mapping_str(self):
        def tool(x: str) -> dict:
            """T."""
            return {}

        t = _create_tool_from_function(tool)
        assert t.parameters["properties"]["x"]["type"] == "string"

    def test_type_mapping_int(self):
        def tool(x: int) -> dict:
            """T."""
            return {}

        t = _create_tool_from_function(tool)
        assert t.parameters["properties"]["x"]["type"] == "integer"

    def test_type_mapping_float(self):
        def tool(x: float) -> dict:
            """T."""
            return {}

        t = _create_tool_from_function(tool)
        assert t.parameters["properties"]["x"]["type"] == "number"

    def test_type_mapping_bool(self):
        def tool(x: bool) -> dict:
            """T."""
            return {}

        t = _create_tool_from_function(tool)
        assert t.parameters["properties"]["x"]["type"] == "boolean"

    def test_type_mapping_list(self):
        def tool(x: list) -> dict:
            """T."""
            return {}

        t = _create_tool_from_function(tool)
        assert t.parameters["properties"]["x"]["type"] == "array"

    def test_type_mapping_dict(self):
        def tool(x: dict) -> dict:
            """T."""
            return {}

        t = _create_tool_from_function(tool)
        assert t.parameters["properties"]["x"]["type"] == "object"

    def test_unknown_type_defaults_to_string(self):
        """Custom classes without a JSON-Schema mapping fall back to ``string``."""

        class CustomType:
            pass

        def tool(x: CustomType) -> dict:
            """T."""
            return {}

        t = _create_tool_from_function(tool)
        assert t.parameters["properties"]["x"]["type"] == "string"

    def test_optional_annotation_unwrapped(self):
        def tool(x: str | None = None) -> dict:
            """T."""
            return {}

        t = _create_tool_from_function(tool)
        # ``str | None`` should unwrap to ``str``, not fall back to "string"
        # by accident — the mapping is intentional.
        assert t.parameters["properties"]["x"]["type"] == "string"

    def test_no_annotation_defaults_to_string(self):
        def tool(x) -> dict:
            """T."""
            return {}

        t = _create_tool_from_function(tool)
        assert t.parameters["properties"]["x"]["type"] == "string"

    def test_self_param_excluded(self):
        class MyClass:
            def tool(self, x: str) -> dict:
                """T."""
                return {}

        t = _create_tool_from_function(MyClass().tool)
        assert "self" not in t.parameters["properties"]

    def test_parameters_schema_structure(self):
        def tool(a: str, b: int = 0) -> dict:
            """T."""
            return {}

        t = _create_tool_from_function(tool)
        assert t.parameters["type"] == "object"
        assert "properties" in t.parameters
        assert "required" in t.parameters

    def test_func_stored_on_tool(self):
        def tool(x: str) -> dict:
            """T."""
            return {"x": x}

        t = _create_tool_from_function(tool)
        assert t.func("hello") == {"x": "hello"}


# ---------------------------------------------------------------------------
# make_tools
# ---------------------------------------------------------------------------


class TestMakeTools:
    def test_returns_dict(self):
        tools = make_tools(settings)
        assert isinstance(tools, dict)

    def test_all_expected_tools_present(self):
        """Core tool set that the agent needs to perform the end-to-end flow."""
        tools = make_tools(settings)
        expected = {
            # Folder & filesystem
            "set_path_for_folder",
            "list_folder",
            "move_media",
            "move_to_destination",
            # Resolvers (one per media type — no unified resolve_destination)
            "resolve_season_destination",
            "resolve_episode_destination",
            "resolve_movie_destination",
            "resolve_series_destination",
            # Subtitles & seeding
            "manage_subtitles",
            "create_seed_links",
            "learn",
            # API
            "find_media_imdb_id",
            "find_torrent",
            "add_torrent_by_index",
            "add_torrent_to_qbittorrent",
            "get_torrent_by_index",
            # Conversation
            "set_language",
        }
        missing = expected - tools.keys()
        assert not missing, f"missing tools: {sorted(missing)}"

    def test_no_legacy_unified_resolver(self):
        """The single ``resolve_destination`` tool was replaced by four typed resolvers."""
        tools = make_tools(settings)
        assert "resolve_destination" not in tools

    def test_each_tool_is_tool_instance(self):
        tools = make_tools(settings)
        for name, tool in tools.items():
            assert isinstance(tool, Tool), f"{name} is not a Tool instance"

    def test_each_tool_has_callable_func(self):
        tools = make_tools(settings)
        for name, tool in tools.items():
            assert callable(tool.func), f"{name}.func is not callable"

    def test_tool_name_matches_key(self):
        tools = make_tools(settings)
        for key, tool in tools.items():
            assert tool.name == key

    def test_resolve_movie_destination_schema(self):
        tools = make_tools(settings)
        t = tools["resolve_movie_destination"]
        # Required args common to all movie resolutions.
        for required_arg in ("source_file", "tmdb_title", "tmdb_year"):
            assert required_arg in t.parameters["required"], (
                f"resolve_movie_destination should require {required_arg}"
            )
        # tmdb_year is typed as int.
        assert t.parameters["properties"]["tmdb_year"]["type"] == "integer"

    def test_resolve_episode_destination_schema(self):
        tools = make_tools(settings)
        t = tools["resolve_episode_destination"]
        required = t.parameters["required"]
        # An episode resolution needs at least the source file and the show
        # identification (title/year). Season/episode numbers also required.
        assert "source_file" in required
        assert "tmdb_title" in required

    def test_move_media_schema(self):
        tools = make_tools(settings)
        t = tools["move_media"]
        required = t.parameters["required"]
        assert "source" in required
        assert "destination" in required

    def test_create_seed_links_schema(self):
        tools = make_tools(settings)
        t = tools["create_seed_links"]
        required = t.parameters["required"]
        assert "library_file" in required
        assert "original_download_folder" in required

    def test_no_duplicate_tools(self):
        tools = make_tools(settings)
        # dict keys are unique by definition, but verify no name conflicts
        names = [t.name for t in tools.values()]
        assert len(names) == len(set(names))