from datetime import datetime, timezone
from uuid import UUID

from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy import select
from sqlalchemy.orm import Session

from .auth import current_user
from .database import get_db
from .models import PhoneNumber, UserAccount

router = APIRouter(prefix="/api/v1/numbers", tags=["numbers"])


def serialize_phone_number(number: PhoneNumber) -> dict:
    return {
        "id": str(number.id),
        "phone_number": number.phone_number,
        "monthly_number_price": float(number.monthly_number_price),
        "inbound_price": float(number.inbound_price),
        "outbound_price": float(number.outbound_price),
        "currency": number.currency,
        "status": number.status,
        "acquisition_type": number.acquisition_type,
        "assigned_at": number.assigned_at,
        "created_at": number.created_at,
    }


@router.get("/catalog")
def list_catalog(
    db: Session = Depends(get_db),
    _: UserAccount = Depends(current_user),
) -> list[dict]:
    numbers = db.scalars(
        select(PhoneNumber)
        .where(PhoneNumber.status == "available", PhoneNumber.user_id.is_(None))
        .order_by(PhoneNumber.created_at.desc())
    ).all()
    return [serialize_phone_number(number) for number in numbers]


@router.get("/mine")
def list_my_numbers(
    db: Session = Depends(get_db),
    user: UserAccount = Depends(current_user),
) -> list[dict]:
    numbers = db.scalars(
        select(PhoneNumber)
        .where(PhoneNumber.user_id == user.id, PhoneNumber.status == "assigned")
        .order_by(PhoneNumber.assigned_at.desc())
    ).all()
    return [serialize_phone_number(number) for number in numbers]


@router.post("/{number_id}/purchase")
def purchase_number(
    number_id: UUID,
    db: Session = Depends(get_db),
    user: UserAccount = Depends(current_user),
) -> dict:
    number = db.scalar(
        select(PhoneNumber).where(
            PhoneNumber.id == number_id,
            PhoneNumber.status == "available",
            PhoneNumber.user_id.is_(None),
        )
    )
    if not number:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Number is not available")

    now = datetime.now(timezone.utc)
    number.user_id = user.id
    number.status = "assigned"
    number.acquisition_type = "purchased"
    number.assigned_at = now
    db.commit()
    db.refresh(number)
    return serialize_phone_number(number)