from fastapi import APIRouter, Depends, HTTPException
from fastapi.responses import Response
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession

from app.db.models.order import Order
from app.db.models.order_line import OrderLine
from app.db.models.tenant import Tenant
from app.db.models.vehicle import Vehicle
from app.db.session import get_db
from app.deps import get_tenant_id
from app.orders import schemas, service
from app.pdf.service import generate_deviz

router = APIRouter()


@router.get("")
async def list_orders(
    tenant_id: str = Depends(get_tenant_id),
    db: AsyncSession = Depends(get_db),
):
    return await service.list_orders(db, tenant_id)


@router.post("")
async def create_order(
    data: schemas.CreateOrderRequest,
    tenant_id: str = Depends(get_tenant_id),
    db: AsyncSession = Depends(get_db),
):
    order = await service.create_order(
        db,
        tenant_id,
        data.vehicle_id,
        data.tip_deviz_id,
        data.km_intrare,
        data.observatii,
    )
    return {"id": order.id}


@router.get("/{order_id}")
async def get_order(
    order_id: str,
    tenant_id: str = Depends(get_tenant_id),
    db: AsyncSession = Depends(get_db),
):
    result = await service.get_order(db, tenant_id, order_id)
    if not result:
        raise HTTPException(status_code=404, detail="Order not found")
    return result


@router.post("/{order_id}/lines")
async def add_line(
    order_id: str,
    data: schemas.AddLineRequest,
    tenant_id: str = Depends(get_tenant_id),
    db: AsyncSession = Depends(get_db),
):
    try:
        line = await service.add_line(
            db,
            tenant_id,
            order_id,
            data.tip,
            data.descriere,
            data.ore,
            data.pret_ora,
            data.cantitate,
            data.pret_unitar,
            data.um,
        )
        return {"id": line.id}
    except ValueError as e:
        raise HTTPException(status_code=422, detail=str(e))


@router.post("/{order_id}/validate")
async def validate_order(
    order_id: str,
    tenant_id: str = Depends(get_tenant_id),
    db: AsyncSession = Depends(get_db),
):
    try:
        order = await service.validate_order(db, tenant_id, order_id)
        return {"status": order.status}
    except ValueError as e:
        raise HTTPException(status_code=422, detail=str(e))


@router.get("/{order_id}/pdf/deviz")
async def get_deviz_pdf(
    order_id: str,
    tenant_id: str = Depends(get_tenant_id),
    db: AsyncSession = Depends(get_db),
):
    r = await db.execute(
        select(Order).where(Order.id == order_id, Order.tenant_id == tenant_id)
    )
    order = r.scalar_one_or_none()
    if not order:
        raise HTTPException(status_code=404, detail="Order not found")

    r = await db.execute(select(Vehicle).where(Vehicle.id == order.vehicle_id))
    vehicle = r.scalar_one_or_none()

    r = await db.execute(select(Tenant).where(Tenant.id == tenant_id))
    tenant = r.scalar_one()

    r = await db.execute(
        select(OrderLine).where(OrderLine.order_id == order.id)
    )
    lines = r.scalars().all()

    order_data = {
        "id": order.id,
        "data_comanda": order.data_comanda,
        "nr_auto": vehicle.nr_inmatriculare if vehicle else "",
        "client_nume": vehicle.client_nume if vehicle else "",
        "marca_denumire": "",
        "model_denumire": "",
        "total_manopera": order.total_manopera,
        "total_materiale": order.total_materiale,
        "total_general": order.total_general,
    }

    tenant_data = {
        "nume": tenant.nume,
        "cui": tenant.cui,
        "adresa": tenant.adresa,
        "telefon": tenant.telefon,
    }

    lines_data = [
        {
            "tip": l.tip,
            "descriere": l.descriere,
            "ore": l.ore,
            "pret_ora": l.pret_ora,
            "cantitate": l.cantitate,
            "pret_unitar": l.pret_unitar,
            "um": l.um,
            "total": l.total,
        }
        for l in lines
    ]

    pdf_bytes = generate_deviz(order_data, lines_data, tenant_data)
    return Response(
        content=pdf_bytes,
        media_type="application/pdf",
        headers={
            "Content-Disposition": f'inline; filename="deviz-{order.id[:8]}.pdf"'
        },
    )