import type { PortInfo } from 'serialport'
import BindingAbstract from '@serialport/binding-abstract'
import { v4 as uuid } from 'uuid'

function genWebSerialPortPath() {
    return '/wsp/' + uuid();
}

function webSerialPortToPortInfo(virtualPath: string, wsp: SerialPort): PortInfo {
    const { usbVendorId, usbProductId } = wsp.getInfo();

    return {
        path: virtualPath,
        vendorId: usbVendorId?.toString(16),
        productId: usbProductId?.toString(16),
    }
}

class WebSerialBinding extends BindingAbstract {
    static portFilters = undefined;
    static wspMap: Map<string, SerialPort> = new Map();

    static requestPort() {
        return navigator.serial
            .requestPort({ filters: WebSerialBinding.portFilters })
            .then((port) => {
                const wspList = Array.from(WebSerialBinding.wspMap.values())

                if (!wspList.includes(port)) {
                    const virtualPath = genWebSerialPortPath()
                    WebSerialBinding.wspMap.set(virtualPath, port);
                }
                return port;
            })
    }

    static async list() {
        return Array.from(WebSerialBinding.wspMap.entries())
            .map(([virtualPath, wsp]) => webSerialPortToPortInfo(virtualPath, wsp))
    }
}

export default WebSerialBinding;