from datetime import date
from typing import Annotated
from fastapi import APIRouter, Depends, Query
import asyncpg

from app.core.pagination import pagination_params
from app.core.responses import ok, paginated
from app.dependencies import get_db, require_admin
from app.models.bookings import (
    UpdateBookingStatus, SlotCreate, WeeklyScheduleCreate,
    GenerateSlotsRequest, BlockedDateCreate, UpdateSlotRequest,
)
from app.services import booking_service, slot_service

router = APIRouter(tags=["Admin — Bookings"])


# ── Bookings ──────────────────────────────────────────────────────────────────

@router.get("/bookings")
async def list_bookings(
    pagination: Annotated[tuple, Depends(pagination_params)],
    status: str | None = Query(None),
    from_date: date | None = Query(None),
    to_date: date | None = Query(None),
    db: asyncpg.Connection = Depends(get_db),
    _: dict = Depends(require_admin),
):
    page, per_page, offset = pagination
    bookings, total = await booking_service.list_bookings(
        db, page, per_page, offset,
        status=status, from_date=from_date, to_date=to_date,
    )
    return paginated(bookings, total, page, per_page)


@router.get("/bookings/{booking_id}")
async def get_booking(
    booking_id: str,
    db: asyncpg.Connection = Depends(get_db),
    _: dict = Depends(require_admin),
):
    booking = await booking_service.get_booking(db, booking_id)
    return ok(booking)


@router.patch("/bookings/{booking_id}")
async def update_booking(
    booking_id: str,
    body: UpdateBookingStatus,
    db: asyncpg.Connection = Depends(get_db),
    admin: dict = Depends(require_admin),
):
    booking = await booking_service.admin_update_booking(
        db, booking_id, body.status, body.admin_notes, str(admin["id"])
    )
    return ok(booking)


@router.delete("/bookings/{booking_id}", status_code=204)
async def delete_booking(
    booking_id: str,
    db: asyncpg.Connection = Depends(get_db),
    _: dict = Depends(require_admin),
):
    await booking_service.admin_delete_booking(db, booking_id)


# ── Slots ─────────────────────────────────────────────────────────────────────

@router.get("/slots")
async def list_slots(
    from_date: date = Query(...),
    to_date: date = Query(...),
    db: asyncpg.Connection = Depends(get_db),
    _: dict = Depends(require_admin),
):
    slots = await slot_service.list_slots(db, from_date, to_date, available_only=False)
    return ok(slots)


@router.post("/slots", status_code=201)
async def create_slot(
    body: SlotCreate,
    db: asyncpg.Connection = Depends(get_db),
    _: dict = Depends(require_admin),
):
    slot = await slot_service.create_slot(db, body)
    return ok(slot)


@router.patch("/slots/{slot_id}")
async def update_slot(
    slot_id: str,
    body: UpdateSlotRequest,
    db: asyncpg.Connection = Depends(get_db),
    _: dict = Depends(require_admin),
):
    slot = await slot_service.update_slot(db, slot_id, body.is_blocked, body.block_reason)
    return ok(slot)


@router.delete("/slots/{slot_id}", status_code=204)
async def delete_slot(
    slot_id: str,
    db: asyncpg.Connection = Depends(get_db),
    _: dict = Depends(require_admin),
):
    await slot_service.delete_slot(db, slot_id)


@router.post("/slots/generate")
async def generate_slots(
    body: GenerateSlotsRequest,
    db: asyncpg.Connection = Depends(get_db),
    _: dict = Depends(require_admin),
):
    created = await slot_service.generate_slots(db, body.from_date, body.to_date)
    return ok({"created": created})


# ── Weekly schedule ───────────────────────────────────────────────────────────

@router.get("/schedule")
async def get_schedule(
    db: asyncpg.Connection = Depends(get_db),
    _: dict = Depends(require_admin),
):
    schedule = await slot_service.get_schedule(db)
    return ok(schedule)


@router.post("/schedule", status_code=201)
async def create_schedule(
    body: WeeklyScheduleCreate,
    db: asyncpg.Connection = Depends(get_db),
    _: dict = Depends(require_admin),
):
    entry = await slot_service.create_schedule_entry(db, body)
    return ok(entry)


@router.delete("/schedule/{schedule_id}", status_code=204)
async def delete_schedule(
    schedule_id: str,
    db: asyncpg.Connection = Depends(get_db),
    _: dict = Depends(require_admin),
):
    await slot_service.delete_schedule_entry(db, schedule_id)


# ── Blocked dates ─────────────────────────────────────────────────────────────

@router.get("/blocked-dates")
async def get_blocked_dates(
    db: asyncpg.Connection = Depends(get_db),
    _: dict = Depends(require_admin),
):
    dates = await slot_service.get_blocked_dates(db)
    return ok(dates)


@router.post("/blocked-dates", status_code=201)
async def add_blocked_date(
    body: BlockedDateCreate,
    db: asyncpg.Connection = Depends(get_db),
    _: dict = Depends(require_admin),
):
    entry = await slot_service.add_blocked_date(db, body.date, body.reason)
    return ok(entry)


@router.delete("/blocked-dates/{blocked_date_id}", status_code=204)
async def remove_blocked_date(
    blocked_date_id: str,
    db: asyncpg.Connection = Depends(get_db),
    _: dict = Depends(require_admin),
):
    await slot_service.remove_blocked_date(db, blocked_date_id)