class Client {

    quantWorker: Worker;

    constructor() { 
    
        /* Quant Worker */
        const blob = new Blob([document.getElementById('quant-worker').textContent]);
        this.quantWorker = new Worker(window.URL.createObjectURL(blob));
        this.quantWorker.addEventListener('message', this.onQuantMessage.bind(this), null);
    }

    onQuantMessage(event) : void {
        
        parent.postMessage({
            pluginMessage: {
                command: "quantizedPalette",
                data: event.data.data,
                id: event.data.id
            }
        }, '*');
    }
}

let client = new Client();

window.onmessage = (event) => {

    if ( !event.data.pluginMessage.command ) {
        throw( new Error("Command not included in plugin message."));
    }

    const command = event.data.pluginMessage.command;

    switch (command) {
        case "quantizeImageData":
            client.quantWorker.postMessage({ data: event.data.pluginMessage.data, id: event.data.pluginMessage.id });
            break;
        default:
            console.warn("Method not found for command `" + command + "`");
            break;
    }
};