// wizard.js — autosave, insertions, couleur catégorie, génération slug

document.addEventListener('DOMContentLoaded', function () {

    var page = document.getElementById('vl-page');
    var uuid = page ? page.dataset.uuid : '';
    var autosaveUrl = page ? page.dataset.autosaveUrl : '';

    // ─── Auto-resize textarea + scroll curseur ──────────────────────────────
    var ta = document.getElementById('wz-content');
    if (ta) {
        function resizeTa() { ta.style.height = 'auto'; ta.style.height = ta.scrollHeight + 'px'; }
        ta.addEventListener('input', resizeTa);
        resizeTa();

        function scrollToCursor() {
            var lineH = parseFloat(getComputedStyle(ta).lineHeight) || 20;
            var padT  = parseFloat(getComputedStyle(ta).paddingTop) || 8;
            var lines = ta.value.substr(0, ta.selectionStart).split('\n').length;
            var cursorY = ta.getBoundingClientRect().top + padT + lines * lineH;
            var margin  = lineH * 3;
            if (cursorY > window.innerHeight - margin) {
                window.scrollBy({ top: cursorY - window.innerHeight + margin, behavior: 'instant' });
            } else if (cursorY < margin) {
                window.scrollBy({ top: cursorY - margin, behavior: 'instant' });
            }
        }
        ta.addEventListener('keyup', scrollToCursor);
        ta.addEventListener('click', scrollToCursor);
    }

    // ─── Ctrl+Enter soumet le formulaire ────────────────────────────────────
    var form = document.querySelector('form[method="POST"]');
    if (form) {
        form.addEventListener('keydown', function (e) {
            if ((e.ctrlKey || e.metaKey) && e.key === 'Enter') { form.submit(); }
        });
    }

    // ─── Génération slug automatique (étape 1 / création) ───────────────────
    var titleInput  = document.getElementById('wz-title');
    var slugField   = document.getElementById('slug');
    var slugPreview = document.getElementById('slug-preview');

    function slugify(s) {
        var map = {'à':'a','â':'a','ä':'a','é':'e','è':'e','ê':'e','ë':'e','î':'i','ï':'i','ô':'o','ö':'o','ù':'u','û':'u','ü':'u','ç':'c','æ':'ae','œ':'oe'};
        return s.toLowerCase()
            .replace(/[àâäéèêëîïôöùûüçæœ]/g, function(c) { return map[c] || c; })
            .replace(/[^a-z0-9]+/g, '-')
            .replace(/^-+|-+$/g, '');
    }

    if (titleInput && slugField) {
        if (slugField.value !== '') slugField._auto = false;
        titleInput.addEventListener('input', function () {
            if (slugField._auto !== false) {
                var gen = slugify(this.value);
                slugField.value = gen;
                if (slugPreview) slugPreview.textContent = gen;
            }
        });
        slugField.addEventListener('input', function () {
            this._auto = (this.value === '');
            if (slugPreview) slugPreview.textContent = this.value;
        });
    }

    // ─── Autosave ────────────────────────────────────────────────────────────
    var indicator = document.getElementById('autosave-indicator');
    if (indicator && uuid && autosaveUrl) {
        var timer     = null;
        var titleEl   = document.getElementById('wz-title');
        var contentEl = document.getElementById('wz-content');

        function scheduleAutosave() {
            clearTimeout(timer);
            timer = setTimeout(doAutosave, 3000);
        }

        async function doAutosave() {
            if (!titleEl || !contentEl) return;
            indicator.textContent = 'Sauvegarde…';
            try {
                var res = await fetch(autosaveUrl, {
                    method: 'POST',
                    headers: {'Content-Type': 'application/x-www-form-urlencoded'},
                    body: new URLSearchParams({
                        title:   titleEl.value,
                        content: contentEl.value,
                        slug:    slugField ? slugField.value : '',
                    }),
                });
                var data = await res.json();
                indicator.textContent = data.ok ? 'Brouillon sauvegardé à ' + data.time : 'Erreur de sauvegarde';
            } catch (err) {
                indicator.textContent = 'Erreur de sauvegarde';
            }
        }

        if (titleEl)   titleEl.addEventListener('input', scheduleAutosave);
        if (ta)        ta.addEventListener('input', scheduleAutosave);
    }

    // ─── Insertion Markdown depuis miniatures ────────────────────────────────
    var insertUrl = page ? page.dataset.insertUrl : '';

    document.querySelectorAll('[data-insert-ref]').forEach(function (el) {
        el.addEventListener('click', function () {
            if (!ta) return;
            var ref     = this.dataset.insertRef;
            var isImage = /\.(jpe?g|png|gif|webp|svg|avif)(\?.*)?$/i.test(ref);
            var md      = isImage ? '![](' + ref + ')' : '[' + ref + '](' + ref + ')';
            var sep     = ta.value.length > 0 && !ta.value.endsWith('\n') ? '\n' : '';
            ta.value   += sep + md;
            ta.focus();
            ta.selectionStart = ta.selectionEnd = ta.value.length;
            ta.dispatchEvent(new Event('input'));
        });
    });

    if (insertUrl) {
        var isImg = /\.(jpe?g|png|gif|webp|svg|avif)(\?.*)?$/i.test(insertUrl);
        var name  = decodeURIComponent(insertUrl.split('/').pop().split('?')[0]) || 'fichier';
        var ref   = isImg ? '![](' + insertUrl + ')' : '[' + name + '](' + insertUrl + ')';
        if (ta) {
            var sep = ta.value.length > 0 && !ta.value.endsWith('\n') ? '\n' : '';
            ta.value += sep + ref;
            ta.dispatchEvent(new Event('input'));
        }
    }

    // ─── Copier référence Markdown (bouton MD dans la liste des fichiers) ────
    document.querySelectorAll('[data-copy-md-name]').forEach(function (btn) {
        btn.addEventListener('click', function () {
            if (!ta) return;
            var name    = this.dataset.copyMdName;
            var isImage = this.dataset.copyMdIsImage === '1';
            var md      = isImage ? '![](' + name + ')' : '[' + name + '](' + name + ')';
            var sep     = ta.value.length > 0 && !ta.value.endsWith('\n') ? '\n' : '';
            ta.value   += sep + md;
            ta.focus();
            ta.dispatchEvent(new Event('input'));
        });
    });

    // ─── Aperçu couleur catégorie (étape 3) ─────────────────────────────────
    var KNOWN_CATS = {
        'actualité': 10, 'travaux': 35, 'scolaire': 55,
        'linux': 120, 'domotique': 160, 'télécom': 190,
        'blog': 220, 'informatique': 255, 'réflexion': 285,
        'loisirs': 320, 'perso': 345,
    };
    var FREE_HUES = [87, 140, 205, 237, 302];

    var catInput   = document.getElementById('category');
    var catSwatch  = document.getElementById('cat-swatch');
    var catHint    = document.getElementById('cat-hint');
    var catSwatches = document.getElementById('cat-free-swatches');

    function catHue(name) {
        var key = name.toLowerCase().trim();
        if (KNOWN_CATS[key] !== undefined) return KNOWN_CATS[key];
        var h = 0;
        for (var i = 0; i < key.length; i++) h = (h * 31 + key.charCodeAt(i)) & 0xffff;
        return h % 360;
    }

    function updateCatSwatch() {
        if (!catInput || !catSwatch) return;
        var v = catInput.value.trim();
        if (v === '') {
            catSwatch.style.background = '#e5e7eb';
            catSwatch.title = '';
            if (catHint) catHint.textContent = '';
        } else {
            var hue = catHue(v);
            catSwatch.style.background = 'hsl(' + hue + ',55%,52%)';
            catSwatch.title = 'hsl(' + hue + ', 55%, 52%)';
            if (catHint) {
                var known = KNOWN_CATS[v.toLowerCase()] !== undefined;
                catHint.textContent = known ? 'Couleur fixe' : 'Nouvelle catégorie (couleur générée)';
            }
        }
    }

    if (catInput) {
        catInput.addEventListener('input', updateCatSwatch);
        updateCatSwatch();

        if (catSwatches) {
            FREE_HUES.forEach(function (h) {
                var sw = document.createElement('span');
                sw.style.cssText = 'display:inline-block;width:20px;height:20px;border-radius:4px;cursor:pointer;background:hsl(' + h + ',55%,52%)';
                sw.title = 'hsl(' + h + ', 55%, 52%)';
                sw.addEventListener('click', function () {
                    // trouver ou créer le nom correspondant
                    catInput.dispatchEvent(new Event('input'));
                });
                catSwatches.appendChild(sw);
            });
        }
    }

    // ─── Plan (TOC dynamique) ────────────────────────────────────────────────
    var tocList = document.getElementById('wz-toc-list');
    if (tocList && ta) {
        function buildToc() {
            var lines = ta.value.split('\n');
            var items = [];
            lines.forEach(function (line) {
                var m = line.match(/^(#{1,6})\s+(.+)/);
                if (m) { items.push({ level: m[1].length, text: m[2].trim() }); }
            });
            if (items.length === 0) {
                tocList.innerHTML = '<li class="small text-muted fst-italic px-1">Aucun titre</li>';
                return;
            }
            var minLevel = Math.min.apply(null, items.map(function (i) { return i.level; }));
            tocList.innerHTML = items.map(function (item) {
                var indent = (item.level - minLevel) * 12;
                var escaped = item.text.replace(/&/g,'&amp;').replace(/</g,'&lt;');
                return '<li class="small text-truncate py-0" style="padding-left:' + indent + 'px" title="' + escaped + '">'
                     + '<span class="text-muted me-1" style="font-size:.65rem">H' + item.level + '</span>'
                     + escaped + '</li>';
            }).join('');
        }
        ta.addEventListener('input', buildToc);
        buildToc();
    }

    // ─── Sélection catégorie — pills .wz-cat-pick (étape 3) ─────────────────
    document.querySelectorAll('.wz-cat-pick').forEach(function (btn) {
        btn.addEventListener('click', function () {
            var catInp = document.getElementById('category');
            if (catInp) {
                catInp.value = this.dataset.cat;
                catInp.dispatchEvent(new Event('input'));
            }
            document.querySelectorAll('.wz-cat-pick').forEach(function (b) { b.classList.remove('active'); });
            this.classList.add('active');
        });
    });

    // ─── Toggle tags — pills .wz-tag-pill (étape 4) ──────────────────────────
    document.querySelectorAll('.wz-tag-pills').forEach(function (container) {
        var targetId = container.dataset.target;
        var inp = document.getElementById(targetId);
        if (!inp) return;
        container.querySelectorAll('.wz-tag-pill').forEach(function (pill) {
            pill.addEventListener('click', function () {
                var val   = this.dataset.value;
                var parts = inp.value.split(',').map(function (s) { return s.trim(); }).filter(Boolean);
                var idx   = parts.indexOf(val);
                if (idx >= 0) {
                    parts.splice(idx, 1);
                    this.classList.remove('btn-secondary', 'btn-info');
                    this.classList.add(this.classList.contains('btn-outline-info') ? 'btn-outline-info' : 'btn-outline-secondary');
                } else {
                    parts.push(val);
                    var isDetected = this.classList.contains('btn-outline-info') || this.classList.contains('btn-info');
                    this.classList.remove('btn-outline-secondary', 'btn-outline-info');
                    this.classList.add(isDetected ? 'btn-info' : 'btn-secondary');
                }
                inp.value = parts.join(', ');
            });
        });
    });

    // ─── Image de couverture .wz-cover-thumb (étape 5) ───────────────────────
    document.querySelectorAll('.wz-cover-thumb').forEach(function (img) {
        img.addEventListener('click', function () {
            document.querySelectorAll('.wz-cover-thumb').forEach(function (i) { i.classList.remove('wz-cover-selected'); });
            this.classList.add('wz-cover-selected');
        });
    });

    // ─── Compteurs SEO (étape 5) ──────────────────────────────────────────────
    (function () {
        function counter(inputId, counterId, warn) {
            var el = document.getElementById(inputId);
            var ct = document.getElementById(counterId);
            if (!el || !ct) return;
            function upd() { var l = el.value.length; ct.textContent = l + ' / ' + warn; ct.className = 'small ' + (l > warn ? 'text-danger' : (l < warn * 0.5 ? 'text-muted' : 'text-success')); }
            el.addEventListener('input', upd);
            upd();
        }
        counter('seo_title', 'seo_title_counter', 60);
        counter('seo_description', 'seo_desc_counter', 155);
    }());

    // ─── Confirmation data-confirm ────────────────────────────────────────────
    document.querySelectorAll('[data-confirm]').forEach(function (el) {
        el.addEventListener('click', function (e) {
            if (!confirm(this.dataset.confirm)) e.preventDefault();
        });
    });

});