import type React from "react";
import { useEffect, useState } from "react";

import { fromByteArray } from "base64-js";
import { toast } from "react-hot-toast";
import { QRCode } from "react-qrcode-logo";

import { Dialog } from "@headlessui/react";
import { ClipboardIcon, XMarkIcon } from "@heroicons/react/24/outline";
import { Protobuf } from "@meshtastic/meshtasticjs";

import { Checkbox } from "../form/Checkbox.js";
import { Input } from "../form/Input.js";
import { IconButton } from "../IconButton.js";

export interface ImportDialogProps {
  isOpen: boolean;
  close: () => void;
  loraConfig?: Protobuf.Config_LoRaConfig;
  channels: Protobuf.Channel[];
}

export const ImportDialog = ({
  isOpen,
  close,
  loraConfig,
  channels
}: ImportDialogProps): JSX.Element => {
  const [selectedChannels, setSelectedChannels] = useState<number[]>([0]);
  const [QRCodeURL, setQRCodeURL] = useState<string>("");

  useEffect(() => {
    const channelsToEncode = channels
      .filter((channel) => selectedChannels.includes(channel.index))
      .map((channel) => channel.settings)
      .filter((ch): ch is Protobuf.ChannelSettings => !!ch);
    const encoded = Protobuf.ChannelSet.toBinary({
      loraConfig,
      settings: channelsToEncode
    });
    const base64 = fromByteArray(encoded)
      .replace(/=/g, "")
      .replace(/\+/g, "-")
      .replace(/\//g, "_");

    setQRCodeURL(`https://meshtastic.org/e/#${base64}`);
  }, [channels, selectedChannels, loraConfig]);

  return (
    <Dialog open={isOpen} onClose={close}>
      <div className="fixed inset-0 bg-black/30" aria-hidden="true" />
      <div className="fixed inset-0 flex items-center justify-center p-4">
        <Dialog.Panel>
          <div className="divide-y divide-gray-200 overflow-hidden rounded-lg bg-white shadow">
            <div className="flex px-4 py-5 sm:px-6">
              <div>
                <h1 className="text-lg font-bold">Generate QR Code</h1>
                <h5 className="text-sm text-slate-600">
                  The current LoRa configuration will also be shared.
                </h5>
              </div>
              <IconButton
                onClick={close}
                className="my-auto ml-auto"
                size="sm"
                variant="secondary"
                icon={<XMarkIcon className="h-4" />}
              />
            </div>
            <div className="flex gap-3 px-4 py-5 sm:p-6">
              <div className="flex w-40 flex-col gap-1">
                {channels.map((channel) => (
                  <Checkbox
                    key={channel.index}
                    disabled={
                      channel.index === 0 ||
                      channel.role === Protobuf.Channel_Role.DISABLED
                    }
                    label={
                      channel.settings?.name.length
                        ? channel.settings.name
                        : channel.role === Protobuf.Channel_Role.PRIMARY
                        ? "Primary"
                        : `Channel: ${channel.index}`
                    }
                    checked={selectedChannels.includes(channel.index)}
                    onChange={() => {
                      if (selectedChannels.includes(channel.index)) {
                        setSelectedChannels(
                          selectedChannels.filter((c) => c !== channel.index)
                        );
                      } else {
                        setSelectedChannels([
                          ...selectedChannels,
                          channel.index
                        ]);
                      }
                    }}
                  />
                ))}
              </div>
              <QRCode value={QRCodeURL} size={200} qrStyle="dots" />
            </div>

            <div className="px-4 py-4 sm:px-6">
              <Input
                label="Sharable URL"
                value={QRCodeURL}
                disabled
                action={{
                  icon: <ClipboardIcon className="h-4" />,
                  action() {
                    void navigator.clipboard.writeText(QRCodeURL);
                    toast.success("Copied URL to Clipboard");
                  }
                }}
              />
            </div>

            {/* </Card> */}
          </div>
        </Dialog.Panel>
      </div>
    </Dialog>
  );
};