"""Public contract for the kommunikation plugin.

Exposes only the symbols that other builtins plugins need.
Importers should use::

    from app.plugins.builtins.contracts import get_contract
    komm = get_contract("kommunikation")
    if komm:
        await komm.send_message(db, tenant_id, ...)

instead of importing from internal modules directly.
"""

from __future__ import annotations

from typing import Any

from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession

from app.plugins.builtins.contracts import get_contract_registry
from app.plugins.builtins.kommunikation.miniapp_registry import (
    MiniAppDef,
    MiniAppRegistry,
    get_miniapp_registry,
    reset_miniapp_registry,
)
from app.plugins.builtins.kommunikation.models import (
    CommConversation,
    CommMessage,
    CommParticipant,
)
from app.plugins.builtins.kommunikation.participant_registry import (
    ParticipantHandler,
    get_participant_registry,
)
from app.plugins.builtins.kommunikation.services import (
    create_plugin_room,
    find_locked_room_id,
    get_conversation,
    get_messages,
    parse_mentions,
    send_message,
)
from app.plugins.builtins.kommunikation.services import post_system_message as _post_system_message


class KommunikationContract:
    """Public API surface for the kommunikation plugin.

    Exposes functions, classes, and model types that other plugins are
    allowed to use.  Internal implementation details remain private to
    the plugin package.
    """

    contract_name = "kommunikation"

    # ─── services ───
    parse_mentions = staticmethod(parse_mentions)
    get_conversation = staticmethod(get_conversation)
    get_messages = staticmethod(get_messages)
    send_message = staticmethod(send_message)
    create_plugin_room = staticmethod(create_plugin_room)
    find_locked_room_id = staticmethod(find_locked_room_id)

    # ─── participant registry ───
    get_participant_registry = staticmethod(get_participant_registry)
    ParticipantHandler = ParticipantHandler

    # ─── mini-app registry ───
    MiniAppRegistry = MiniAppRegistry
    MiniAppDef = MiniAppDef
    get_miniapp_registry = staticmethod(get_miniapp_registry)
    reset_miniapp_registry = staticmethod(reset_miniapp_registry)
    post_system_message = staticmethod(_post_system_message)

    # ─── models (read-only for queries) ───
    CommConversation = CommConversation
    CommMessage = CommMessage
    CommParticipant = CommParticipant

    @staticmethod
    async def dsar_collect(
        db: AsyncSession, tenant_id: Any, user_id: Any
    ) -> dict[str, Any]:
        """GDPR Art. 15: collect communication messages sent by the user."""
        comm_messages = (
            await db.execute(
                select(CommMessage).where(
                    CommMessage.sender_id == user_id,
                    CommMessage.tenant_id == tenant_id,
                ).limit(1000)
            )
        ).scalars().all()
        return {
            "comm_messages": [
                {
                    "id": str(m.id),
                    "sender_type": m.sender_type,
                    "content": m.content[:500],
                    "created_at": m.created_at.isoformat() if m.created_at else None,
                }
                for m in comm_messages
            ]
        }



    # ─── Workspace Scopes contribution (Phase N4) ───

    @staticmethod
    def workspace_scopes() -> list[dict]:
        """Scope-Dimensionen des communication-Moduls: Räume-Teilmengen (N4)."""
        return [
            {
                "module_key": "communication",
                "dimensions": [
                    {
                        "key": "conversation_ids",
                        "label": "Räume",
                        "control": "multiselect",
                        "options": [],
                        "value_source": {
                            "endpoint": "/api/v1/comm/conversations",
                            "items_path": "items",
                            "value_key": "id",
                            "label_key": "title",
                        },
                    },
                ],
            }
        ]


# ─── self-registration ───

_contract = KommunikationContract()
get_contract_registry().register("kommunikation", _contract)


__all__ = [
    "KommunikationContract",
    "ParticipantHandler",
    "get_participant_registry",
    "MiniAppRegistry",
    "MiniAppDef",
    "get_miniapp_registry",
    "reset_miniapp_registry",
    "parse_mentions",
    "get_conversation",
    "get_messages",
    "send_message",
    "create_plugin_room",
    "find_locked_room_id",
    "CommConversation",
    "CommMessage",
    "CommParticipant",
]