"""
Tenants Controller

The tenant registry's read API (core-api T-8 / workspace D-73): `GET
/tenants/me` and `GET /tenants`. No write routes this round — provisioning
is later (workspace T-195).
"""
from fastapi import APIRouter, Depends, HTTPException
from sqlalchemy.ext.asyncio import AsyncSession

from src.domains.auth.callers import Caller, require_caller
from src.domains.tenants.schemas import TenantListResponse, TenantMeResponse, TenantSummary
from src.domains.tenants.service import TenantError, get_tenants_service
from src.shared.base import BaseController
from src.shared.database import get_async_session
from src.shared.logging import get_logger

logger = get_logger(__name__)

require_tenants_reader = require_caller("office", "user")
require_tenants_lister = require_caller("office", "user", "tatlock", "scheduler")


def _summary(tenant) -> TenantSummary:
    return TenantSummary(
        id=tenant.id, display_name=tenant.display_name, kind=tenant.kind, status=tenant.status
    )


class TenantsController(BaseController):
    """Controller for the tenant registry's read API."""

    def __init__(self):
        super().__init__(prefix="/tenants", tags=["Tenants"])

    def create_router(self) -> APIRouter:
        router = APIRouter(prefix=self.prefix, tags=self.tags)
        service = get_tenants_service()

        # =====================================================================
        # me
        # =====================================================================

        @router.get(
            "/me",
            response_model=TenantMeResponse,
            summary="The caller's own tenant and the consumers granted in it",
        )
        async def get_me(
            caller: Caller = Depends(require_tenants_reader),
            session: AsyncSession = Depends(get_async_session),
        ):
            try:
                tenant, consumers, default_address = await service.get_me(session, caller)
            except TenantError as error:
                raise HTTPException(
                    status_code=error.status_code, detail={"code": error.code}
                ) from error
            return TenantMeResponse(
                id=tenant.id,
                display_name=tenant.display_name,
                kind=tenant.kind,
                status=tenant.status,
                consumers=consumers,
                default_address=default_address,
            )

        # =====================================================================
        # list
        # =====================================================================

        @router.get(
            "",
            response_model=TenantListResponse,
            summary="Every tenant (tatlock/scheduler) or the caller's own, as a list of one",
        )
        async def list_tenants(
            caller: Caller = Depends(require_tenants_lister),
            session: AsyncSession = Depends(get_async_session),
        ):
            try:
                tenants = await service.list_tenants(session, caller)
            except TenantError as error:
                raise HTTPException(
                    status_code=error.status_code, detail={"code": error.code}
                ) from error
            return TenantListResponse(tenants=[_summary(tenant) for tenant in tenants])

        return router


# Create controller instance
tenants_controller = TenantsController()