/* global thalimNL, tinymce */
(function ($) {
    'use strict';

    // -------------------------------------------------------------------------
    // Month change → AJAX reload sections + update TinyMCE intro
    // -------------------------------------------------------------------------
    $('#thalim-nl-month').on('change', function () {
        var month  = $(this).val();
        var $wrap  = $('#thalim-nl-sections-wrap');
        var $spin  = $('.thalim-nl-spinner');

        if (!month) return;

        $spin.addClass('is-active');
        $wrap.css('opacity', '0.5');

        $.post(thalimNL.ajaxUrl, {
            action:    'thalim_nl_load_month',
            month:     month,
            _wpnonce:  thalimNL.nonce,
        })
        .done(function (response) {
            if (!response.success) return;

            $wrap.html(response.data.html);

            // Update TinyMCE intro — do NOT re-render wp_editor
            var introEditor = typeof tinymce !== 'undefined' && tinymce.get('thalim_nl_intro');
            if (introEditor) {
                introEditor.setContent(response.data.intro || '');
            } else {
                $('#thalim_nl_intro').val(response.data.intro || '');
            }

            // Update TinyMCE conclusion
            var conclusionEditor = typeof tinymce !== 'undefined' && tinymce.get('thalim_nl_conclusion');
            if (conclusionEditor) {
                conclusionEditor.setContent(response.data.conclusion || '');
            } else {
                $('#thalim_nl_conclusion').val(response.data.conclusion || '');
            }

            // Update subscribe/unsubscribe URLs
            $('#thalim-nl-subscribe').val(response.data.subscribe_url || '');
            $('#thalim-nl-unsubscribe').val(response.data.unsubscribe_url || '');
        })
        .fail(function () {
            $wrap.html('<p class="thalim-nl-empty">Erreur lors du chargement.</p>');
        })
        .always(function () {
            $spin.removeClass('is-active');
            $wrap.css('opacity', '1');
        });
    });

    // -------------------------------------------------------------------------
    // Fetch newsletter HTML (shared by download & preview)
    // -------------------------------------------------------------------------
    function fetchNewsletterHTML(postId) {
        return $.post(thalimNL.ajaxUrl, {
            action:    'thalim_nl_export_html',
            post_id:   postId,
            _wpnonce:  thalimNL.nonce,
        });
    }

    // -------------------------------------------------------------------------
    // Download HTML file
    // -------------------------------------------------------------------------
    $(document).on('click', '.thalim-nl-download', function () {
        var $btn     = $(this);
        var postId   = $btn.data('post-id');
        var filename = $btn.data('filename') || 'newsletter-THALIM.html';
        var origText = $btn.text();

        $btn.prop('disabled', true).text('…');

        fetchNewsletterHTML(postId)
        .done(function (response) {
            if (!response.success) {
                alert('Erreur : ' + (response.data || 'Impossible d\'exporter le HTML.'));
                return;
            }
            var blob = new Blob([response.data.html], { type: 'text/html;charset=utf-8' });
            var url  = URL.createObjectURL(blob);
            var a    = document.createElement('a');
            a.href     = url;
            a.download = filename;
            document.body.appendChild(a);
            a.click();
            document.body.removeChild(a);
            URL.revokeObjectURL(url);
        })
        .fail(function () {
            alert('Erreur réseau lors de l\'export.');
        })
        .always(function () {
            $btn.prop('disabled', false).text(origText);
        });
    });

    // -------------------------------------------------------------------------
    // Preview in new window
    // -------------------------------------------------------------------------
    $(document).on('click', '.thalim-nl-preview', function () {
        var $btn     = $(this);
        var postId   = $btn.data('post-id');
        var origText = $btn.text();

        $btn.prop('disabled', true).text('…');

        fetchNewsletterHTML(postId)
        .done(function (response) {
            if (!response.success) {
                alert('Erreur : ' + (response.data || 'Impossible de charger la prévisualisation.'));
                return;
            }
            var win = window.open('', '_blank');
            if (win) {
                win.document.open();
                win.document.write(response.data.html);
                win.document.close();
            } else {
                alert('Le navigateur a bloqué l\'ouverture de la fenêtre. Autorisez les pop-ups pour ce site.');
            }
        })
        .fail(function () {
            alert('Erreur réseau lors du chargement.');
        })
        .always(function () {
            $btn.prop('disabled', false).text(origText);
        });
    });

}(jQuery));