(function (window, document) {
    'use strict';

    var page = document.getElementById('media-admin-page');
    if (!page) {
        return;
    }

    var uploadForm = document.getElementById('media-upload-form');
    var uploadButton = document.getElementById('media-upload-submit');
    var uploadInput = document.getElementById('media-upload-input');
    var feedback = document.getElementById('media-upload-feedback');
    var isPickerMode = page.dataset.pickerMode === '1';

    function setFeedback(message, isError) {
        if (!feedback) {
            return;
        }

        feedback.textContent = message;
        feedback.style.color = isError ? '#b91c1c' : '';
    }

    async function copyToClipboard(text) {
        if (navigator.clipboard && navigator.clipboard.writeText) {
            await navigator.clipboard.writeText(text);
            return;
        }

        var helper = document.createElement('textarea');
        helper.value = text;
        helper.setAttribute('readonly', 'readonly');
        helper.style.position = 'absolute';
        helper.style.left = '-9999px';
        document.body.appendChild(helper);
        helper.select();
        document.execCommand('copy');
        document.body.removeChild(helper);
    }

    function toAbsoluteUrl(url) {
        try {
            return new URL(String(url || ''), window.location.origin).href;
        } catch (error) {
            return String(url || '');
        }
    }

    function buildImageHtml(url, mediaId) {
        return '<img src="' + String(url)
            .replace(/&/g, '&amp;')
            .replace(/"/g, '&quot;')
            .replace(/</g, '&lt;')
            .replace(/>/g, '&gt;') + '" alt="" data-media-id="' + Number(mediaId) + '">';
    }

    function flashButtonLabel(button, message, isError) {
        if (!button) {
            return;
        }

        if (!button.dataset.originalLabel) {
            button.dataset.originalLabel = button.textContent.trim();
        }

        if (button.dataset.restoreTimerId) {
            window.clearTimeout(Number(button.dataset.restoreTimerId));
        }

        button.textContent = message;

        if (isError) {
            button.classList.add('btn--danger');
        }

        button.dataset.restoreTimerId = String(window.setTimeout(function () {
            button.textContent = button.dataset.originalLabel || '';
            button.classList.remove('btn--danger');
            delete button.dataset.restoreTimerId;
        }, 1800));
    }

    async function handleUpload() {
        if (!uploadForm || !uploadButton || !uploadInput) {
            return;
        }

        if (!uploadInput.files || uploadInput.files.length === 0) {
            setFeedback('Sélectionnez une image avant de téléverser.', true);
            return;
        }

        uploadButton.disabled = true;
        setFeedback('Téléversement en cours…', false);

        try {
            var response = await fetch(uploadForm.dataset.uploadUrl || uploadForm.action || window.location.href, {
                method: 'POST',
                body: new FormData(uploadForm),
                credentials: 'same-origin',
                headers: {
                    'X-Requested-With': 'XMLHttpRequest'
                }
            });

            var payload = await response.json();

            if (!response.ok) {
                throw new Error(payload.error || 'Le téléversement a échoué.');
            }

            setFeedback('Image téléversée. Rafraîchissement…', false);
            window.location.reload();
        } catch (error) {
            setFeedback(error instanceof Error ? error.message : 'Le téléversement a échoué.', true);
        } finally {
            uploadButton.disabled = false;
        }
    }

    if (uploadButton) {
        uploadButton.addEventListener('click', function () {
            handleUpload();
        });
    }

    page.addEventListener('click', async function (event) {
        var button = event.target.closest('[data-media-action]');
        if (!button) {
            return;
        }

        var action = button.dataset.mediaAction;
        var url = button.dataset.mediaUrl || '';
        var mediaId = Number(button.dataset.mediaId || '0');

        if (action === 'insert-editor') {
            if (isPickerMode && window.parent && window.parent !== window) {
                window.parent.postMessage({
                    type: 'netslim:media-selected',
                    url: url,
                    mediaId: mediaId,
                    html: buildImageHtml(url, mediaId)
                }, window.location.origin);
            }
            return;
        }

        try {
            if (action === 'copy-url') {
                await copyToClipboard(toAbsoluteUrl(url));
                flashButtonLabel(button, 'URL copiée.', false);
                return;
            }

            if (action === 'copy-html') {
                await copyToClipboard(buildImageHtml(url, mediaId));
                flashButtonLabel(button, 'HTML copié.', false);
                return;
            }
        } catch (error) {
            flashButtonLabel(button, 'Copie impossible.', true);
            setFeedback('Impossible de copier dans le presse-papiers.', true);
        }
    });
})(window, document);