import re
from http import HTTPStatus
from typing import Optional

from bech32 import bech32_decode, convertbits
from fastapi import Query, Request, Response
from fastapi.params import Depends
from loguru import logger
from starlette.exceptions import HTTPException

from lnbits.core.crud import get_user
from lnbits.core.services import create_invoice
from lnbits.core.views.api import api_payment
from lnbits.decorators import WalletTypeInfo, get_key_type, require_admin_key
from lnbits.utils.exchange_rates import fiat_amount_as_satoshis

from . import nostrnip5_ext
from .crud import (
    activate_address,
    create_address_internal,
    create_domain_internal,
    delete_address,
    delete_domain,
    get_address_by_local_part,
    get_addresses,
    get_all_addresses,
    get_domain,
    get_domain_by_name,
    get_domains,
    rotate_address,
)
from .models import CreateAddressData, CreateDomainData, RotateAddressData


@nostrnip5_ext.get("/api/v1/domains", status_code=HTTPStatus.OK)
async def api_domains(
    all_wallets: bool = Query(None), wallet: WalletTypeInfo = Depends(get_key_type)
):
    wallet_ids = [wallet.wallet.id]
    if all_wallets:
        wallet_ids = (await get_user(wallet.wallet.user)).wallet_ids

    return [domain.dict() for domain in await get_domains(wallet_ids)]


@nostrnip5_ext.get("/api/v1/addresses", status_code=HTTPStatus.OK)
async def api_addresses(
    all_wallets: bool = Query(None), wallet: WalletTypeInfo = Depends(get_key_type)
):
    wallet_ids = [wallet.wallet.id]
    if all_wallets:
        wallet_ids = (await get_user(wallet.wallet.user)).wallet_ids

    return [address.dict() for address in await get_all_addresses(wallet_ids)]


@nostrnip5_ext.get("/api/v1/domain/{domain_id}", status_code=HTTPStatus.OK)
async def api_invoice(domain_id: str, wallet: WalletTypeInfo = Depends(get_key_type)):
    domain = await get_domain(domain_id)
    if not domain:
        raise HTTPException(
            status_code=HTTPStatus.NOT_FOUND, detail="Domain does not exist."
        )

    return domain


@nostrnip5_ext.post("/api/v1/domain", status_code=HTTPStatus.CREATED)
async def api_domain_create(
    data: CreateDomainData, wallet: WalletTypeInfo = Depends(get_key_type)
):
    exists = await get_domain_by_name(data.domain)
    logger.error(exists)
    if exists:
        raise HTTPException(
            status_code=HTTPStatus.NOT_FOUND, detail="Domain already exists."
        )

    domain = await create_domain_internal(wallet_id=wallet.wallet.id, data=data)

    return domain


@nostrnip5_ext.delete("/api/v1/domain/{domain_id}", status_code=HTTPStatus.CREATED)
async def api_domain_delete(
    domain_id: str,
    wallet: WalletTypeInfo = Depends(require_admin_key),
):
    await delete_domain(domain_id)

    return True


@nostrnip5_ext.delete("/api/v1/address/{address_id}", status_code=HTTPStatus.CREATED)
async def api_address_delete(
    address_id: str,
    wallet: WalletTypeInfo = Depends(require_admin_key),
):
    await delete_address(address_id)

    return True


@nostrnip5_ext.post(
    "/api/v1/domain/{domain_id}/address/{address_id}/activate",
    status_code=HTTPStatus.OK,
)
async def api_address_activate(
    domain_id: str,
    address_id: str,
    wallet: WalletTypeInfo = Depends(require_admin_key),
):
    await activate_address(domain_id, address_id)

    return True


@nostrnip5_ext.post(
    "/api/v1/domain/{domain_id}/address/{address_id}/rotate",
    status_code=HTTPStatus.OK,
)
async def api_address_rotate(
    domain_id: str,
    address_id: str,
    post_data: RotateAddressData,
):

    if post_data.pubkey.startswith("npub"):
        hrp, data = bech32_decode(post_data.pubkey)
        decoded_data = convertbits(data, 5, 8, False)
        post_data.pubkey = bytes(decoded_data).hex()

    if len(bytes.fromhex(post_data.pubkey)) != 32:
        raise HTTPException(
            status_code=HTTPStatus.NOT_FOUND, detail="Pubkey must be in hex format."
        )

    await rotate_address(domain_id, address_id, post_data.pubkey)

    return True


@nostrnip5_ext.post(
    "/api/v1/domain/{domain_id}/address", status_code=HTTPStatus.CREATED
)
async def api_address_create(
    post_data: CreateAddressData,
    domain_id: str,
):
    domain = await get_domain(domain_id)

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

    if post_data.local_part == "_":
        raise HTTPException(
            status_code=HTTPStatus.NOT_FOUND, detail="You're sneaky, nice try."
        )

    regex = re.compile(r"^[a-z0-9_.]+$")
    if not re.fullmatch(regex, post_data.local_part.lower()):
        raise HTTPException(
            status_code=HTTPStatus.NOT_FOUND,
            detail="Only a-z, 0-9 and .-_ are allowed characters, case insensitive.",
        )

    exists = await get_address_by_local_part(domain_id, post_data.local_part)

    if exists:
        raise HTTPException(
            status_code=HTTPStatus.NOT_FOUND, detail="Local part already exists."
        )

    if post_data.pubkey.startswith("npub"):
        hrp, data = bech32_decode(post_data.pubkey)
        decoded_data = convertbits(data, 5, 8, False)
        post_data.pubkey = bytes(decoded_data).hex()

    if len(bytes.fromhex(post_data.pubkey)) != 32:
        raise HTTPException(
            status_code=HTTPStatus.NOT_FOUND, detail="Pubkey must be in hex format."
        )

    address = await create_address_internal(domain_id=domain_id, data=post_data)
    price_in_sats = await fiat_amount_as_satoshis(domain.amount / 100, domain.currency)

    try:
        payment_hash, payment_request = await create_invoice(
            wallet_id=domain.wallet,
            amount=price_in_sats,
            memo=f"Payment for NIP-05 for {address.local_part}@{domain.domain}",
            extra={
                "tag": "nostrnip5",
                "domain_id": domain_id,
                "address_id": address.id,
            },
        )
    except Exception as e:
        raise HTTPException(status_code=HTTPStatus.INTERNAL_SERVER_ERROR, detail=str(e))

    return {
        "payment_hash": payment_hash,
        "payment_request": payment_request,
        "address_id": address.id,
    }


@nostrnip5_ext.get(
    "/api/v1/domain/{domain_id}/payments/{payment_hash}", status_code=HTTPStatus.OK
)
async def api_nostrnip5_check_payment(domain_id: str, payment_hash: str):
    domain = await get_domain(domain_id)
    if not domain:
        raise HTTPException(
            status_code=HTTPStatus.NOT_FOUND, detail="Domain does not exist."
        )
    try:
        status = await api_payment(payment_hash)

    except Exception as exc:
        logger.error(exc)
        return {"paid": False}
    return status


@nostrnip5_ext.get("/api/v1/domain/{domain_id}/nostr.json", status_code=HTTPStatus.OK)
async def api_get_nostr_json(
    response: Response, domain_id: str, name: str = Query(None)
):
    addresses = [address.dict() for address in await get_addresses(domain_id)]
    output = {}

    for address in addresses:
        local_part = address.get("local_part").lower()

        if address.get("active") == False:
            continue

        if name and name.lower() != local_part:
            continue

        output[local_part] = address.get("pubkey")

    response.headers["Access-Control-Allow-Origin"] = "*"
    response.headers["Access-Control-Allow-Methods"] = "GET,OPTIONS"

    return {"names": output}