import time
from datetime import datetime
from http import HTTPStatus
from typing import List

from fastapi.params import Depends, Query
from starlette.responses import HTMLResponse

from lnbits.decorators import check_user_exists
from lnbits.core.models import Payment, User
from lnbits.core.crud import get_standalone_payment
from lnbits.core.views.api import api_payment

from . import offlineshop_ext, offlineshop_renderer
from .models import Item
from .crud import get_item, get_shop
from fastapi import Request, HTTPException


@offlineshop_ext.get("/", response_class=HTMLResponse)
async def index(request: Request, user: User = Depends(check_user_exists)):
    return offlineshop_renderer().TemplateResponse(
        "offlineshop/index.html", {"request": request, "user": user.dict()}
    )


@offlineshop_ext.get("/print", response_class=HTMLResponse)
async def print_qr_codes(request: Request, items: List[int] = None):
    items = []
    for item_id in request.query_params.get("items").split(","):
        item = await get_item(item_id)  # type: Item
        if item:
            items.append(
                {
                    "lnurl": item.lnurl(request),
                    "name": item.name,
                    "price": f"{item.price} {item.unit}",
                }
            )

    return offlineshop_renderer().TemplateResponse(
        "offlineshop/print.html", {"request": request, "items": items}
    )


@offlineshop_ext.get(
    "/confirmation/{p}",
    name="offlineshop.confirmation_code",
    response_class=HTMLResponse,
)
async def confirmation_code(p: str = Query(...)):
    style = "<style>* { font-size: 100px}</style>"

    payment_hash = p
    await api_payment(payment_hash)
    payment: Payment = await get_standalone_payment(payment_hash)
    if not payment:
        raise HTTPException(
            status_code=HTTPStatus.NOT_FOUND,
            detail=f"Couldn't find the payment {payment_hash}." + style,
        )
    if payment.pending:
        raise HTTPException(
            status_code=HTTPStatus.PAYMENT_REQUIRED,
            detail=f"Payment {payment_hash} wasn't received yet. Please try again in a minute."
            + style,
        )

    if payment.time + 60 * 15 < time.time():
        raise HTTPException(
            status_code=HTTPStatus.REQUEST_TIMEOUT,
            detail="Too much time has passed." + style,
        )

    item = await get_item(payment.extra.get("item"))
    shop = await get_shop(item.shop)

    return (
        f"""
[{shop.get_code(payment_hash)}]<br>
{item.name}<br>
{item.price} {item.unit}<br>
{datetime.utcfromtimestamp(payment.time).strftime('%Y-%m-%d %H:%M:%S')}
    """
        + style
    )