(function () {
    'use strict';

    function fallbackCopy(text) {
        const input = document.createElement('textarea');
        input.value = text;
        input.setAttribute('readonly', 'readonly');
        input.style.position = 'fixed';
        input.style.left = '-9999px';
        document.body.appendChild(input);
        input.select();

        try {
            document.execCommand('copy');
        } finally {
            document.body.removeChild(input);
        }
    }

    function copyText(text) {
        if (navigator.clipboard && navigator.clipboard.writeText) {
            return navigator.clipboard.writeText(text);
        }

        fallbackCopy(text);
        return Promise.resolve();
    }

    function showCopied(button) {
        const original = button.dataset.copyLabel || button.textContent;
        const copied = button.dataset.copiedLabel || 'Copied';

        button.textContent = copied;
        window.setTimeout(function () {
            button.textContent = original;
        }, 1400);
    }

    document.addEventListener('DOMContentLoaded', function () {
        document.querySelectorAll('.js-copy-button').forEach(function (button) {
            button.addEventListener('click', function () {
                let text = button.dataset.copyText || '';
                const targetId = button.dataset.copyTarget || '';
                const target = targetId ? document.getElementById(targetId) : null;

                if (target) {
                    text = target.value || target.textContent || '';
                }

                copyText(text).then(function () {
                    showCopied(button);
                });
            });
        });
    });
}());