"""Tests for ``alfred.agent.workflows.loader.WorkflowLoader``.

Two layers of coverage:

1. **TestRealWorkflows** — Asserts on the YAML files that ship in the repo
   (``alfred/agent/workflows/``). These tests act as a structural contract:
   if a step id, tool name, or naming convention is renamed, the test
   surfaces the change immediately. They use the real loader with no
   monkeypatching.

2. **TestLoaderMechanics** — Loader behavior in isolation, using a
   monkeypatched workflows directory. Covers ``get`` / ``names`` / ``all``,
   YAML ``name`` precedence over filename, malformed-file resilience,
   deterministic ordering on name collision, and the empty-directory case.

Current workflow naming convention is ``<domain>.<workflow_name>``
(e.g. ``media.organize_media``), not the legacy bare ``organize_media``.
"""

import pytest
import yaml

from alfred.agent.workflows.loader import WorkflowLoader

ORGANIZE_MEDIA = "media.organize_media"
MANAGE_SUBTITLES = "media.manage_subtitles"


# ---------------------------------------------------------------------------
# Fixtures
# ---------------------------------------------------------------------------


@pytest.fixture
def workflows_dir(tmp_path):
    """A temp directory pre-populated with one valid workflow YAML."""
    wf = {
        "name": "test_workflow",
        "description": "A test workflow",
        "tools": ["list_folder", "move_media"],
        "steps": [
            {"id": "step1", "tool": "list_folder"},
        ],
    }
    (tmp_path / "test_workflow.yaml").write_text(yaml.dump(wf))
    return tmp_path


@pytest.fixture
def loader_from_dir(workflows_dir, monkeypatch):
    """WorkflowLoader pointed at our temp dir."""
    import alfred.agent.workflows.loader as loader_module

    monkeypatch.setattr(loader_module, "_WORKFLOWS_DIR", workflows_dir)
    return WorkflowLoader()


# ---------------------------------------------------------------------------
# Real loader (loads actual YAML files from the repo)
# ---------------------------------------------------------------------------


class TestRealWorkflows:
    """Contract tests against the workflows shipped in ``alfred/agent/workflows``."""

    def test_organize_media_loaded(self):
        loader = WorkflowLoader()
        assert ORGANIZE_MEDIA in loader.names()

    def test_manage_subtitles_loaded(self):
        loader = WorkflowLoader()
        assert MANAGE_SUBTITLES in loader.names()

    def test_organize_media_has_required_keys(self):
        loader = WorkflowLoader()
        wf = loader.get(ORGANIZE_MEDIA)
        assert wf is not None
        assert wf["name"] == ORGANIZE_MEDIA
        assert "steps" in wf
        assert "tools" in wf

    def test_organize_media_tools_list(self):
        loader = WorkflowLoader()
        wf = loader.get(ORGANIZE_MEDIA)
        tools = wf["tools"]
        # The four required tools that compose the move pipeline.
        for required in (
            "list_folder",
            "move_to_destination",
            "manage_subtitles",
            "create_seed_links",
        ):
            assert required in tools, f"missing tool: {required}"
        # There is no single ``resolve_destination`` tool anymore — the
        # workflow declares the four media-type-specific resolvers.
        for resolver in (
            "resolve_season_destination",
            "resolve_episode_destination",
            "resolve_movie_destination",
            "resolve_series_destination",
        ):
            assert resolver in tools, f"missing resolver: {resolver}"

    def test_organize_media_steps_order(self):
        loader = WorkflowLoader()
        wf = loader.get(ORGANIZE_MEDIA)
        step_ids = [s["id"] for s in wf["steps"]]
        # resolve_destination is the *step id* (not tool name) that fans
        # out to the four resolvers.
        assert step_ids.index("resolve_destination") < step_ids.index("move_file")
        assert step_ids.index("move_file") < step_ids.index("handle_subtitles")
        assert step_ids.index("ask_seeding") < step_ids.index("create_seed_links")

    def test_ask_seeding_has_yes_no_answers(self):
        loader = WorkflowLoader()
        wf = loader.get(ORGANIZE_MEDIA)
        ask_step = next(s for s in wf["steps"] if s["id"] == "ask_seeding")
        answers = ask_step["ask_user"]["answers"]
        # PyYAML parses bare yes/no as booleans, quoted as strings — normalize.
        answer_keys = {str(k).lower() for k in answers.keys()}
        assert "yes" in answer_keys
        assert "no" in answer_keys

    def test_naming_convention_present(self):
        loader = WorkflowLoader()
        wf = loader.get(ORGANIZE_MEDIA)
        assert "naming_convention" in wf
        assert "tv_show" in wf["naming_convention"]
        assert "movie" in wf["naming_convention"]


# ---------------------------------------------------------------------------
# WorkflowLoader mechanics (via monkeypatched dir)
# ---------------------------------------------------------------------------


class TestLoaderMechanics:
    """Loader behavior driven by YAML files in a temp directory."""

    def test_get_returns_workflow(self, loader_from_dir):
        wf = loader_from_dir.get("test_workflow")
        assert wf is not None
        assert wf["name"] == "test_workflow"

    def test_get_returns_none_for_unknown(self, loader_from_dir):
        assert loader_from_dir.get("nonexistent") is None

    def test_names_returns_list(self, loader_from_dir):
        names = loader_from_dir.names()
        assert isinstance(names, list)
        assert "test_workflow" in names

    def test_all_returns_dict(self, loader_from_dir):
        all_wf = loader_from_dir.all()
        assert isinstance(all_wf, dict)
        assert "test_workflow" in all_wf

    def test_uses_yaml_name_field(self, tmp_path, monkeypatch):
        """Name from YAML content takes priority over filename stem."""
        import alfred.agent.workflows.loader as loader_module

        monkeypatch.setattr(loader_module, "_WORKFLOWS_DIR", tmp_path)

        wf = {"name": "my_custom_name", "steps": []}
        (tmp_path / "completely_different_filename.yaml").write_text(yaml.dump(wf))

        loader = WorkflowLoader()
        assert "my_custom_name" in loader.names()
        assert "completely_different_filename" not in loader.names()

    def test_falls_back_to_stem_when_no_name(self, tmp_path, monkeypatch):
        import alfred.agent.workflows.loader as loader_module

        monkeypatch.setattr(loader_module, "_WORKFLOWS_DIR", tmp_path)

        (tmp_path / "my_workflow.yaml").write_text(yaml.dump({"steps": []}))
        loader = WorkflowLoader()
        assert "my_workflow" in loader.names()

    def test_skips_malformed_yaml(self, tmp_path, monkeypatch):
        import alfred.agent.workflows.loader as loader_module

        monkeypatch.setattr(loader_module, "_WORKFLOWS_DIR", tmp_path)

        (tmp_path / "valid.yaml").write_text(yaml.dump({"name": "valid", "steps": []}))
        (tmp_path / "broken.yaml").write_text("key: [unclosed bracket")

        loader = WorkflowLoader()
        assert "valid" in loader.names()
        assert "broken" not in loader.names()

    def test_deterministic_load_order(self, tmp_path, monkeypatch):
        """Files loaded in sorted order — later file wins on name collision."""
        import alfred.agent.workflows.loader as loader_module

        monkeypatch.setattr(loader_module, "_WORKFLOWS_DIR", tmp_path)

        (tmp_path / "a_workflow.yaml").write_text(
            yaml.dump({"name": "duplicate", "version": 1})
        )
        (tmp_path / "b_workflow.yaml").write_text(
            yaml.dump({"name": "duplicate", "version": 2})
        )

        loader = WorkflowLoader()
        # b_workflow loaded last → version 2 wins
        assert loader.get("duplicate")["version"] == 2

    def test_empty_directory(self, tmp_path, monkeypatch):
        import alfred.agent.workflows.loader as loader_module

        monkeypatch.setattr(loader_module, "_WORKFLOWS_DIR", tmp_path)

        loader = WorkflowLoader()
        assert loader.names() == []
        assert loader.all() == {}