"""DMS plugin contract — public interface for cross-plugin access."""

from __future__ import annotations

from app.plugins.builtins.contracts import get_contract_registry
from app.plugins.builtins.dms.models import File as DmsFile
from app.plugins.builtins.dms.models import Folder


class DmsContract:
    """Public contract for the DMS plugin."""

    contract_name = "dms"

    DmsFile = DmsFile
    Folder = Folder

    @staticmethod
    def workspace_scopes() -> list[dict]:
        """Scope-Dimensionen des dms-Moduls für den Workspace-Editor (N1)."""
        return [
            {
                "module_key": "dms",
                "dimensions": [
                    {
                        "key": "folder_ids",
                        "label": "DMS-Ordner",
                        "control": "multiselect",
                        "value_source": {
                            "endpoint": "/api/v1/dms/folders",
                            "items_path": "",
                            "value_key": "id",
                            "label_key": "name",
                        },
                    },
                    {
                        "key": "file_types",
                        "label": "Datei-Typen",
                        "control": "multiselect",
                        "options": [
                            {"value": "application/pdf", "label": "PDF"},
                            {"value": "image/", "label": "Bilder"},
                            {"value": "spreadsheet", "label": "Tabellen"},
                            {"value": "word", "label": "Dokumente"},
                            {"value": "other", "label": "Sonstige"},
                        ],
                    },
                ],
            }
        ]

    @classmethod
    def get_function(cls, name: str):
        """Return a callable exposed by this contract, or None if absent."""
        return getattr(cls, name, None)


# ─── self-registration ───

_contract = DmsContract()
get_contract_registry().register("dms", _contract)

# Backward-compatible local accessor
_contract_instance: DmsContract | None = None


def get_contract() -> DmsContract:
    global _contract_instance
    if _contract_instance is None:
        _contract_instance = DmsContract()
    return _contract_instance


__all__ = ["DmsContract", "DmsFile", "Folder"]