import json
from http import HTTPStatus

from fastapi import Depends, Query, Request
from lnurl.exceptions import InvalidUrl as LnurlInvalidUrl  # type: ignore
from starlette.exceptions import HTTPException

from lnbits.core.crud import get_user
from lnbits.decorators import WalletTypeInfo, get_key_type
from lnbits.utils.exchange_rates import currencies, get_fiat_rate_satoshis

from . import lnurlp_ext
from .crud import (
    create_pay_link,
    delete_pay_link,
    get_pay_link,
    get_pay_links,
    update_pay_link,
)
from .models import CreatePayLinkData


@lnurlp_ext.get("/api/v1/currencies")
async def api_list_currencies_available():
    return list(currencies.keys())


@lnurlp_ext.get("/api/v1/links", status_code=HTTPStatus.OK)
async def api_links(
    req: Request,
    wallet: WalletTypeInfo = Depends(get_key_type),
    all_wallets: bool = Query(False),
):
    wallet_ids = [wallet.wallet.id]

    if all_wallets:
        user = await get_user(wallet.wallet.user)
        wallet_ids = user.wallet_ids if user else []

    try:
        return [
            {**link.dict(), "lnurl": link.lnurl(req)}
            for link in await get_pay_links(wallet_ids)
        ]

    except LnurlInvalidUrl:
        raise HTTPException(
            status_code=HTTPStatus.UPGRADE_REQUIRED,
            detail="LNURLs need to be delivered over a publically accessible `https` domain or Tor.",
        )


@lnurlp_ext.get("/api/v1/links/{link_id}", status_code=HTTPStatus.OK)
async def api_link_retrieve(
    r: Request, link_id, wallet: WalletTypeInfo = Depends(get_key_type)
):
    link = await get_pay_link(link_id)

    if not link:
        raise HTTPException(
            detail="Pay link does not exist.", status_code=HTTPStatus.NOT_FOUND
        )

    if link.wallet != wallet.wallet.id:
        raise HTTPException(
            detail="Not your pay link.", status_code=HTTPStatus.FORBIDDEN
        )

    return {**link.dict(), **{"lnurl": link.lnurl(r)}}


@lnurlp_ext.post("/api/v1/links", status_code=HTTPStatus.CREATED)
@lnurlp_ext.put("/api/v1/links/{link_id}", status_code=HTTPStatus.OK)
async def api_link_create_or_update(
    data: CreatePayLinkData,
    request: Request,
    link_id=None,
    wallet: WalletTypeInfo = Depends(get_key_type),
):

    if data.min > data.max:
        raise HTTPException(
            detail="Min is greater than max.", status_code=HTTPStatus.BAD_REQUEST
        )

    if data.currency == None and (
        round(data.min) != data.min or round(data.max) != data.max or data.min < 1
    ):
        raise HTTPException(
            detail="Must use full satoshis.", status_code=HTTPStatus.BAD_REQUEST
        )

    if data.webhook_headers:
        try:
            json.loads(data.webhook_headers)
        except ValueError:
            raise HTTPException(
                detail="Invalid JSON in webhook_headers.",
                status_code=HTTPStatus.BAD_REQUEST,
            )

    if data.webhook_body:
        try:
            json.loads(data.webhook_body)
        except ValueError:
            raise HTTPException(
                detail="Invalid JSON in webhook_body.",
                status_code=HTTPStatus.BAD_REQUEST,
            )

    # database only allows int4 entries for min and max. For fiat currencies,
    # we multiply by data.fiat_base_multiplier (usually 100) to save the value in cents.
    if data.currency and data.fiat_base_multiplier:
        data.min *= data.fiat_base_multiplier
        data.max *= data.fiat_base_multiplier

    if data.success_url is not None and not data.success_url.startswith("https://"):
        raise HTTPException(
            detail="Success URL must be secure https://...",
            status_code=HTTPStatus.BAD_REQUEST,
        )

    if link_id:
        link = await get_pay_link(link_id)

        if not link:
            raise HTTPException(
                detail="Pay link does not exist.", status_code=HTTPStatus.NOT_FOUND
            )

        if link.wallet != wallet.wallet.id:
            raise HTTPException(
                detail="Not your pay link.", status_code=HTTPStatus.FORBIDDEN
            )

        link = await update_pay_link(**data.dict(), link_id=link_id)
    else:
        link = await create_pay_link(data, wallet_id=wallet.wallet.id)
    assert link
    return {**link.dict(), "lnurl": link.lnurl(request)}


@lnurlp_ext.delete("/api/v1/links/{link_id}", status_code=HTTPStatus.OK)
async def api_link_delete(link_id, wallet: WalletTypeInfo = Depends(get_key_type)):
    link = await get_pay_link(link_id)

    if not link:
        raise HTTPException(
            detail="Pay link does not exist.", status_code=HTTPStatus.NOT_FOUND
        )

    if link.wallet != wallet.wallet.id:
        raise HTTPException(
            detail="Not your pay link.", status_code=HTTPStatus.FORBIDDEN
        )

    await delete_pay_link(link_id)
    return {"success": True}


@lnurlp_ext.get("/api/v1/rate/{currency}", status_code=HTTPStatus.OK)
async def api_check_fiat_rate(currency):
    try:
        rate = await get_fiat_rate_satoshis(currency)
    except AssertionError:
        rate = None

    return {"rate": rate}