// منطق اصلی ادیتور + Color Picker + Trimmer Logic

// ==========================
// --- Editor Core Logic ---
// ==========================

// متغیرهای پیکر رنگ
let pickerState = { h: 0, s: 0, v: 100, a: 100 };
let currentTarget = null;
let savedColors = [];
let isDraggingSpectrum = false;
let currentDeleteIndex = -1;
let toastTimeout;

// متغیرهای Trimmer (ویرایش زمان دقیق)
let trimMinLimit = 0; // پایان کلمه قبل
let trimMaxLimit = 0; // شروع کلمه بعد
let trimViewDuration = 0;
let activeDragHandle = null;

// آپدیت گرافیکی اسلایدرها
function updateRange(input, labelId, unit = '%') {
    const label = document.getElementById(labelId);
    if (label) label.innerText = input.value + unit;
    
    const min = parseFloat(input.min);
    const max = parseFloat(input.max);
    const val = parseFloat(input.value);
    const percentage = ((val - min) / (max - min)) * 100;
    input.style.backgroundSize = percentage + '% 100%';
}

function syncUIWithState() {
    let fzPercent = ((state.st.fz - 10) / 140) * 100;
    const fzInput = document.getElementById('fz');
    if(fzInput) { fzInput.value = Math.round(Math.max(0, Math.min(100, fzPercent))); updateRange(fzInput, 'lbl-size'); }

    let yPercent = (state.st.y / 1200) * 100;
    const posInput = document.getElementById('pos');
    if(posInput) { posInput.value = Math.round(Math.max(0, Math.min(100, yPercent))); updateRange(posInput, 'lbl-y'); }

    let currentX = state.st.x || 0;
    let xPercent = (currentX / 500) * 100;
    const posXInput = document.getElementById('posX');
    if(posXInput) { posXInput.value = Math.round(Math.max(-100, Math.min(100, xPercent))); updateRange(posXInput, 'lbl-x'); }

    const radiusInput = document.getElementById('radius');
    if(radiusInput) { radiusInput.value = state.st.radius || 16; updateRange(radiusInput, 'lbl-radius', 'px'); }
    
    const paddingXInput = document.getElementById('paddingX');
    if(paddingXInput) { paddingXInput.value = state.st.paddingX || 20; updateRange(paddingXInput, 'lbl-paddingX', 'px'); }
    
    const paddingYInput = document.getElementById('paddingY');
    if(paddingYInput) { paddingYInput.value = state.st.paddingY || 10; updateRange(paddingYInput, 'lbl-paddingY', 'px'); }
}

function openProject(projectId) {
    currentProjectId = projectId;
    const tx = db.transaction("projects", "readonly");
    const store = tx.objectStore("projects");
    const req = store.get(projectId);
    
    req.onsuccess = (e) => {
        const p = e.target.result;
        if (!p) { alert('پروژه یافت نشد'); loadHome(); return; }
        
        state = p.state;
        if (state.st.radius === undefined) state.st.radius = 16;
        if (state.st.paddingX === undefined) state.st.paddingX = 20;
        if (state.st.paddingY === undefined) state.st.paddingY = 10;

        document.getElementById('currentProjectTitle').innerText = p.name;
        
        try {
            const videoURL = URL.createObjectURL(p.videoBlob);
            v.src = videoURL;
        } catch(err) {
            console.error("Error creating video URL:", err);
            alert("خطا در بارگذاری ویدیو.");
            return;
        }
        
        updateColorPreviewButtons();
        syncUIWithState();
        
        document.querySelectorAll('.font-btn').forEach(btn => btn.classList.remove('ticked'));
        if(state.st.f === 'vazir') document.querySelectorAll('.font-btn')[1].classList.add('ticked');
        else if(state.st.f === 'lalezar') document.querySelectorAll('.font-btn')[0].classList.add('ticked');
        
        document.querySelectorAll('.style-card').forEach(c => c.classList.remove('selected'));
        if(state.st.name === 'karaoke_static') {
            const cards = document.querySelectorAll('.style-card');
            cards.forEach(c => {
                if(c.textContent.includes('ثابت') || (c.dataset.styleName === 'karaoke_static')) c.classList.add('selected');
            });
        }

        document.getElementById('homeScreen').style.display = 'none';
        document.getElementById('editorScreen').style.display = 'flex';
        
        initSavedColors();
        const palette = generateGridPalette();
        renderGridWithData(palette);
        renderSegList();
        
        if (v.readyState >= 1) { fit(); upd(); } 
        else {
            v.onloadeddata = () => {
                fit(); upd();
                if(!p.thumbnail && v.duration > 1) {
                     v.currentTime = 1.0; 
                     let captured = false;
                     v.addEventListener('seeked', function cap() {
                         if(captured) return; captured = true; saveProjectToDB(); v.currentTime = 0;
                     }, {once:true});
                } else if (!p.thumbnail) { saveProjectToDB(); }
            };
        }
    };
    
    req.onerror = (e) => { console.error("Error opening project:", e); alert("خطا در باز کردن پروژه"); loadHome(); };
}

function goHome() { if(v) v.pause(); saveProjectToDB(); loadHome(); }

function fit() { 
    // اصلاح: دریافت ابعاد از ویدیو اگر در استیت موجود نبود (حل مشکل نمایش و خروجی)
    const vw = (state.w && state.w > 0) ? state.w : v.videoWidth;
    const vh = (state.h && state.h > 0) ? state.h : v.videoHeight;
    
    if(!vw || !v) return; 
    
    // ذخیره ابعاد اصلاح شده در استیت برای جلوگیری از ارسال عدد 0 به سرور
    if(!state.w || state.w === 0) { state.w = vw; state.h = vh; }

    const ws = document.getElementById('workspace'); 
    const availableHeight = window.innerHeight * 0.6; 
    const scale = Math.min((ws.clientWidth - 40) / vw, availableHeight / vh); 
    
    const c = document.getElementById('videoContainer'); 
    c.style.width = vw + 'px'; 
    c.style.height = vh + 'px'; 
    
    document.getElementById('scaler').style.transform = `scale(${scale})`; 
    ws.style.height = (vh * scale + 40) + 'px';
}

function activateCustomStyle() {
    if(['karaoke_static', 'auto_director', 'plain_white', 'white_outline'].includes(state.st.name)) {
         state.st.name = 'classic';
         document.querySelectorAll('.style-card').forEach(c => c.classList.remove('selected'));
         const classicCard = document.querySelector('.custom-style-container .style-card:first-child');
         if(classicCard) classicCard.classList.add('selected');
    }
}

function renderSegList() {
    saveProjectToDB();
    const timeline = document.getElementById('timelineScroll');
    const spacers = timeline.querySelectorAll('.spacer');
    timeline.innerHTML = '';
    timeline.appendChild(spacers[0]); 
    if(!state.segs) state.segs = [];

    state.segs.forEach((seg, sIdx) => {
        if (!seg.words || seg.words.length === 0) {
            const wordsArr = seg.text.trim().split(/\s+/).filter(w => w.length > 0);
            const duration = seg.end - seg.start;
            const timePerWord = duration / Math.max(1, wordsArr.length);
            let wStart = seg.start;
            seg.words = wordsArr.map((wStr, i) => {
                let wEnd = wStart + timePerWord;
                if (i === wordsArr.length - 1) wEnd = seg.end;
                let obj = { word: wStr, start: parseFloat(wStart.toFixed(2)), end: parseFloat(wEnd.toFixed(2)) };
                wStart = wEnd;
                return obj;
            });
        }
        seg.words.forEach((w, wIdx) => {
            const el = document.createElement('div');
            el.className = 'word-chip';
            el.innerText = w.word;
            const uid = `${sIdx}-${wIdx}`;
            el.id = `w-${uid}`;
            if (activeWordId === uid) el.classList.add('active');
            el.onclick = (e) => { e.stopPropagation(); highlightWord(sIdx, wIdx, true); };
            timeline.appendChild(el);
        });
        if (sIdx < state.segs.length - 1) {
            const nl = document.createElement('div');
            nl.className = 'newline-indicator';
            nl.innerHTML = '<i class="fa-solid fa-arrow-turn-down" style="transform: rotate(90deg) scaleX(-1);"></i>';
            timeline.appendChild(nl);
        }
    });
    timeline.appendChild(spacers[1]); 
    updateSplitButton();
}

function highlightWord(sIdx, wIdx, showToolbar) {
    activeWordId = `${sIdx}-${wIdx}`;
    v.pause();
    togglePlayIcon(false);
    if(!state.segs[sIdx] || !state.segs[sIdx].words[wIdx]) return;
    const word = state.segs[sIdx].words[wIdx];
    v.currentTime = word.start;
    manualOverride = true; 
    updateOverlayContent(v.currentTime);
    document.querySelectorAll('.word-chip').forEach(c => c.classList.remove('active'));
    const el = document.getElementById(`w-${activeWordId}`);
    if(el) {
        el.classList.add('active');
        el.scrollIntoView({ behavior: 'smooth', block: 'center', inline: 'center' });
    }
    if(showToolbar) document.getElementById('toolbar').classList.add('show');
    updateSplitButton();
}

// ============================================
// --- LOGIC: Trimmer & Precise Time Playback ---
// ============================================

function initTrimmerUI(startT, endT, minLimit, maxLimit) {
    // تنظیم محدودیت‌های سراسری
    trimMinLimit = minLimit;
    trimMaxLimit = maxLimit;
    trimViewDuration = trimMaxLimit - trimMinLimit;
    
    // جلوگیری از خطای تقسیم بر صفر
    if(trimViewDuration <= 0.001) trimViewDuration = 1;

    // اعمال مقادیر اولیه به UI
    updateTrimmerVisuals();
    
    // مخفی کردن نوار نورانی وسط (طبق درخواست)
    const track = document.getElementById('trackActive');
    if(track) track.style.display = 'none';

    // هندلرهای درگ
    const handleL = document.getElementById('handleLeft');
    const handleR = document.getElementById('handleRight');
    
    const startDrag = (e, type) => {
        if(e.cancelable) e.preventDefault();
        e.stopPropagation();
        
        activeDragHandle = type;
        
        // بزرگنمایی دکمه هنگام لمس
        e.target.style.transform = "scale(1.5)";
        e.target.style.transition = "transform 0.1s";
        e.target.style.zIndex = "100";

        document.addEventListener('mousemove', onDrag);
        document.addEventListener('mouseup', endDrag);
        document.addEventListener('touchmove', onDrag, {passive: false});
        document.addEventListener('touchend', endDrag);
    };

    if(handleL) {
        handleL.onmousedown = (e) => startDrag(e, 'left');
        handleL.ontouchstart = (e) => startDrag(e, 'left');
        // استایل اولیه برای جلوگیری از تداخل
        handleL.style.position = 'absolute';
    }
    if(handleR) {
        handleR.onmousedown = (e) => startDrag(e, 'right');
        handleR.ontouchstart = (e) => startDrag(e, 'right');
        handleR.style.position = 'absolute';
    }
}

function onDrag(e) {
    if (!activeDragHandle) return;
    if(e.cancelable) e.preventDefault();
    e.stopPropagation();
    
    const strip = document.getElementById('timelineStrip');
    if (!strip) return;
    
    const rect = strip.getBoundingClientRect();
    
    // دریافت موقعیت X
    let clientX;
    if (e.touches && e.touches.length > 0) {
        clientX = e.touches[0].clientX;
    } else {
        clientX = e.clientX;
    }
    
    // محاسبه درصد از سمت چپ
    let percentFromLeft = (clientX - rect.left) / rect.width;
    percentFromLeft = Math.max(0, Math.min(1, percentFromLeft));
    
    // تبدیل به منطق RTL (راست به چپ)
    // در این حالت: سمت راست (100% چپ) = شروع بازه (Min)
    // سمت چپ (0% چپ) = پایان بازه (Max)
    // فرمول معکوس:
    let percentRTL = 1 - percentFromLeft;
    
    // محاسبه زمان بر اساس درصد RTL
    let newTime = trimMinLimit + (percentRTL * trimViewDuration);
    newTime = Math.round(newTime * 100) / 100;
    
    if (activeDragHandle === 'right') {
        // دکمه سمت راست = شروع زمان (Start Time)
        // نباید کمتر از حد مجاز (Min) باشد
        if (newTime < trimMinLimit) newTime = trimMinLimit;
        // نباید جلوتر از پایان فعلی برود
        if (newTime >= tempEndTime - 0.05) newTime = tempEndTime - 0.05;
        
        tempStartTime = newTime;
    } else {
        // دکمه سمت چپ = پایان زمان (End Time)
        // نباید بیشتر از حد مجاز (Max) باشد
        if (newTime > trimMaxLimit) newTime = trimMaxLimit;
        // نباید عقب‌تر از شروع فعلی بیاید
        if (newTime <= tempStartTime + 0.05) newTime = tempStartTime + 0.05;
        
        tempEndTime = newTime;
    }
    
    updateTrimmerVisuals();
}

function endDrag(e) {
    if(!activeDragHandle) return;
    
    // بازگشت سایز دکمه به حالت عادی
    const handleL = document.getElementById('handleLeft');
    const handleR = document.getElementById('handleRight');
    if(handleL) { handleL.style.transform = "scale(1)"; handleL.style.zIndex = "10"; }
    if(handleR) { handleR.style.transform = "scale(1)"; handleR.style.zIndex = "10"; }

    activeDragHandle = null;
    document.removeEventListener('mousemove', onDrag);
    document.removeEventListener('mouseup', endDrag);
    document.removeEventListener('touchmove', onDrag);
    document.removeEventListener('touchend', endDrag);
}

function updateTrimmerVisuals() {
    // نمایش متنی
    const tStartDisp = document.getElementById('trimStartDisp');
    const tEndDisp = document.getElementById('trimEndDisp');
    if(tStartDisp) tStartDisp.innerText = formatTimeMs(tempStartTime);
    if(tEndDisp) tEndDisp.innerText = formatTimeMs(tempEndTime);
    
    // محاسبه موقعیت دکمه‌ها برای حالت RTL
    // دکمه راست (Start): فاصله از لبه راست کادر
    const percentStart = ((tempStartTime - trimMinLimit) / trimViewDuration) * 100;
    
    // دکمه چپ (End): فاصله از لبه چپ کادر
    // چون محور معکوس است: End Time به Max نزدیک‌تر است که سمت چپ قرار دارد
    const percentEnd = ((trimMaxLimit - tempEndTime) / trimViewDuration) * 100;
    
    const handleL = document.getElementById('handleLeft');
    const handleR = document.getElementById('handleRight');
    
    // اعمال پوزیشن
    if(handleR) {
        handleR.style.right = `${percentStart}%`;
        handleR.style.left = 'auto'; // حذف تداخل
    }
    
    if(handleL) {
        handleL.style.left = `${percentEnd}%`;
        handleL.style.right = 'auto'; // حذف تداخل
    }
}

function formatTimeMs(t) {
    let m = Math.floor(t / 60);
    let s = Math.floor(t % 60);
    let ms = Math.round((t - Math.floor(t)) * 100);
    return `${m < 10 ? '0'+m : m}:${s < 10 ? '0'+s : s}.${ms < 10 ? '0'+ms : ms}`;
}

// تابع پخش دقیق
function playPreviewWord() {
    if ((tempStartTime === undefined) || (tempEndTime === undefined)) return;
    
    if(previewInterval) clearInterval(previewInterval);
    v.pause();
    
    v.currentTime = tempStartTime;
    
    const icon1 = document.getElementById('btnPreviewPlay')?.querySelector('i');
    if(icon1) icon1.className = "fa-solid fa-pause";
    
    const icon2 = document.getElementById('btnTimeSheetPlayIcon');
    if(icon2) icon2.className = "fa-solid fa-pause";
    
    v.play().then(() => {
        previewInterval = setInterval(() => {
            if(v.currentTime >= tempEndTime) {
                v.pause();
                clearInterval(previewInterval);
                
                if(icon1) icon1.className = "fa-solid fa-play";
                if(icon2) icon2.className = "fa-solid fa-play";
                
                v.currentTime = tempEndTime; 
            }
        }, 15);
    }).catch(e => console.log("Play interrupted", e));
}

function saveText() {
    if (!activeWordId) return;
    const [sIdx, wIdx] = activeWordId.split('-').map(Number);
    const val = document.getElementById('textInput').value.trim();
    if (val) {
        state.segs[sIdx].words[wIdx].word = val;
        state.segs[sIdx].text = state.segs[sIdx].words.map(w => w.word).join(' ');
        renderSegList();
        highlightWord(sIdx, wIdx, true);
    }
    closeAllSheets();
}

function adjustTime(type, am) {
    // اصلاح منطق دکمه‌های مثبت و منفی برای حالت RTL
    if(type === 'start') {
        let v = parseFloat((tempStartTime + am).toFixed(2));
        if(v < trimMinLimit) v = trimMinLimit; 
        if(v >= tempEndTime - 0.05) v = parseFloat((tempEndTime - 0.05).toFixed(2));
        tempStartTime = v; 
    } else {
        let v = parseFloat((tempEndTime + am).toFixed(2));
        if(v <= tempStartTime + 0.05) v = parseFloat((tempStartTime + 0.05).toFixed(2));
        if(v > trimMaxLimit) v = trimMaxLimit;
        tempEndTime = v; 
    }
    updateTrimmerVisuals();
}

function confirmTimeChanges() {
    if (!activeWordId) return;
    const [sIdx, wIdx] = activeWordId.split('-').map(Number);
    const seg = state.segs[sIdx];
    
    seg.words[wIdx].start = tempStartTime;
    seg.words[wIdx].end = tempEndTime;
    
    if (wIdx === 0 && tempStartTime < seg.start) seg.start = tempStartTime;
    if (wIdx === seg.words.length - 1 && tempEndTime > seg.end) seg.end = tempEndTime;
    
    closeAllSheets(); 
    renderSegList(); 
    highlightWord(sIdx, wIdx, true);
}
function cancelTimeChanges() { closeAllSheets(); }

function confirmDeleteWord() {
    if (!activeWordId) return;
    const [sIdx, wIdx] = activeWordId.split('-').map(Number);
    const seg = state.segs[sIdx];
    seg.words.splice(wIdx, 1);
    if (seg.words.length === 0) { state.segs.splice(sIdx, 1); activeWordId = null; document.getElementById('toolbar').classList.remove('show'); } 
    else { seg.text = seg.words.map(w => w.word).join(' '); activeWordId = null; document.getElementById('toolbar').classList.remove('show'); }
    closeAllSheets(); renderSegList();
}

function toggleSplit() {
    if (!activeWordId) return;
    const [sIdx, wIdx] = activeWordId.split('-').map(Number);
    if (wIdx === 0 && sIdx > 0) {
        const prevSeg = state.segs[sIdx - 1]; const currSeg = state.segs[sIdx];
        prevSeg.words = prevSeg.words.concat(currSeg.words); prevSeg.end = currSeg.end; 
        prevSeg.text = prevSeg.words.map(w => w.word).join(' '); state.segs.splice(sIdx, 1); 
        const newWIdx = prevSeg.words.length - currSeg.words.length;
        renderSegList(); highlightWord(sIdx - 1, newWIdx, true);
    } else {
        const seg = state.segs[sIdx]; const wordsFirstHalf = seg.words.slice(0, wIdx); const wordsSecondHalf = seg.words.slice(wIdx);
        seg.words = wordsFirstHalf; seg.text = seg.words.map(w => w.word).join(' '); seg.end = wordsFirstHalf[wordsFirstHalf.length-1].end;
        const newSeg = { id: Date.now().toString() + "_" + Math.floor(Math.random() * 1000), text: wordsSecondHalf.map(w => w.word).join(' '), start: wordsSecondHalf[0].start, end: wordsSecondHalf[wordsSecondHalf.length-1].end, words: wordsSecondHalf, isHidden: false };
        state.segs.splice(sIdx + 1, 0, newSeg);
        renderSegList(); highlightWord(sIdx + 1, 0, true);
    }
}

function updateSplitButton() {
    const btn = document.getElementById('btnSplit'); if(!activeWordId) { btn.classList.remove('active-state'); return; }
    const [sIdx, wIdx] = activeWordId.split('-').map(Number);
    if (wIdx === 0 && sIdx > 0) { btn.classList.add('active-state'); btn.style.transform = "rotate(180deg)"; } else { btn.classList.remove('active-state'); btn.style.transform = ""; }
}

function togglePlay() { if(v.paused) { v.play(); togglePlayIcon(true); } else { v.pause(); togglePlayIcon(false); } }
function togglePlayIcon(isPlaying) { const overlay = document.getElementById('playOverlay'); overlay.className = isPlaying ? 'playing' : ''; }

function updateOverlayContent(currentTime) {
    if (!state.segs) return;
    const idx = state.segs.findIndex(s => currentTime >= s.start && currentTime <= s.end); 
    if(idx !== -1) { 
        const seg = state.segs[idx]; 
        if(seg.isHidden) { tEl.style.opacity = 0; } 
        else { 
            tEl.style.opacity = 1; 
            
            const karaokeStyles = ['auto_director', 'karaoke_static'];
            if(karaokeStyles.includes(state.st.name) && seg.words) {
                let html = ""; 
                // فاصله استاندارد بین کلمات (ثابت)
                const GAP = 5;

                seg.words.forEach((w, i) => { 
                    let isActive = (currentTime >= w.start && currentTime <= w.end); 
                    
                    let boxColor = (state.st.name === 'auto_director') 
                        ? (i % 2 === 0 ? '#00D7FF' : '#FF0080') 
                        : state.st.col;
                    
                    let textColor = '#ffffff';
                    if (w.color) textColor = w.color;

                    // استایل پایه: اینلاین-بلاک برای اعمال پدینگ/مارجین، و تراز عمودی وسط
                    let baseStyle = "display: inline-block; vertical-align: middle; transition: all 0.1s; font-family: inherit;";

                    if(isActive) {
                        // تکنیک حاشیه منفی:
                        // 1. padding: کادر را بزرگ می‌کند.
                        // 2. margin منفی: اثر padding را خنثی می‌کند تا بقیه کلمات هل داده نشوند.
                        // فرمول افقی: فاصله استاندارد (GAP) منهای پدینگ تنظیمی
                        // فرمول عمودی: منفی پدینگ تنظیمی (برای جلوگیری از پریدن خط بالا/پایین)
                        
                        let py = state.st.paddingY;
                        let px = state.st.paddingX;

                        html += `<span style="${baseStyle} 
                                background-color: ${boxColor}; 
                                color: ${textColor} !important; 
                                border-radius: ${state.st.radius}px;
                                box-shadow: 0 0 10px rgba(0,0,0,0.3);
                                
                                padding: ${py}px ${px}px;
                                margin: -${py}px calc(${GAP}px - ${px}px);
                                
                                position: relative; 
                                z-index: 100;
                                white-space: nowrap;">${w.word}</span>`;
                    } else {
                        // کلمات غیرفعال: فقط فاصله استاندارد را دارند
                        html += `<span style="${baseStyle} 
                                color: ${textColor} !important; 
                                text-shadow: none; 
                                margin: 0 ${GAP}px; 
                                padding: 0;
                                position: relative;
                                z-index: 1;">${w.word}</span>`;
                    }
                    
                    // شکستن خطوط
                    if ((i + 1) % 5 === 0 && i !== seg.words.length - 1) {
                        html += "<br><br>"; 
                    }
                });
                tEl.innerHTML = html;
            } 
            else if (state.st.name === 'progressive_write' && seg.words) { 
                let html = ""; 
                seg.words.forEach((w, i) => { 
                    let styleExtra = "";
                    if (w.color) styleExtra = `color:${w.color} !important;`;
                    
                    // تغییر ۱: اضافه کردن دیسپلی اینلاین-بلاک و مارجین برای جلوگیری از چسبیدن
                    let baseStyle = "display: inline-block; vertical-align: middle; margin: 0px 3px;";

                    if(currentTime >= w.start) html += `<span style="${baseStyle} opacity:1; ${styleExtra}">${w.word}</span> `; 
                    else html += `<span style="${baseStyle} opacity:0; ${styleExtra}">${w.word}</span> `; 
                    
                    // تغییر ۲: استفاده از دو عدد اینتر (<br><br>) برای ایجاد فاصله بین خطوط بالا و پایین
                    if ((i + 1) % 5 === 0 && i !== seg.words.length - 1) {
                        html += "<br><br>";
                    }
                }); 
                tEl.innerHTML = html.trim(); 
            } 
            else { 
                // For static blocks without word-level highlights in data, mostly fallback or manual override
                // We'll rely on text segmentation. If words array exists, use it to break lines
                if (seg.words && seg.words.length > 0) {
                     let html = "";
                     seg.words.forEach((w, i) => {
                         let styleExtra = "";
                         if (w.color) styleExtra = `color:${w.color} !important;`;
                         html += `<span style="${styleExtra}">${w.word}</span> `;
                         if ((i + 1) % 5 === 0 && i !== seg.words.length - 1) {
                        html += "<br><br>"; 
                    }
                     });
                     tEl.innerHTML = html;
                } else {
                    tEl.innerText = seg.text; 
                }
            } 
        } 
    } else { tEl.style.opacity = 0; } 
}

function upd() {
    saveProjectToDB();
    state.st.fz = Math.round(10 + (parseFloat(document.getElementById('fz').value) / 100) * 140); 
    state.st.y = Math.round((parseFloat(document.getElementById('pos').value) / 100) * 1200);       
    state.st.x = Math.round((parseFloat(document.getElementById('posX').value) / 100) * 500);
    state.st.radius = parseInt(document.getElementById('radius').value, 10);
    state.st.paddingX = parseInt(document.getElementById('paddingX').value, 10);
    state.st.paddingY = parseInt(document.getElementById('paddingY').value, 10);

    updateColorPreviewButtons();

    let font = 'Vazirmatn';
    if(state.st.f === 'lalezar') font = 'Lalezar'; if(state.st.f === 'bangers') font = 'Impact'; if(state.st.f === 'roboto') font = 'Arial';
    
    tEl.style.fontFamily = font; tEl.style.fontSize = state.st.fz + 'px'; tEl.style.lineHeight = '0.8'; tEl.style.bottom = state.st.y + 'px'; 
    tEl.style.textAlign = 'center'; tEl.style.left = '50%'; tEl.style.transform = `translateX(calc(-50% + ${state.st.x}px))`; 
    tEl.style.paintOrder = 'normal'; tEl.style.webkitPaintOrder = 'normal';
    // Remove fixed padding here because we might handle it per word in karaoke
    tEl.style.padding = '0'; 
    tEl.style.borderRadius = '0px';

    const karaokeStyles = ['karaoke_static', 'auto_director'];
    if(karaokeStyles.includes(state.st.name)) {
        tEl.style.backgroundColor = 'transparent'; tEl.style.color = '#FFFFFF'; tEl.style.webkitTextStroke = '0px'; tEl.style.textShadow = 'none';
    } else if (state.st.name === 'plain_white' || state.st.name === 'white_outline') {
        tEl.style.color = '#FFFFFF'; tEl.style.backgroundColor = 'transparent'; tEl.style.webkitTextStroke = (state.st.name === 'white_outline') ? `${Math.max(3, state.st.fz / 4.5)}px #000000` : '0px'; tEl.style.paintOrder = 'stroke fill'; tEl.style.webkitPaintOrder = 'stroke fill'; tEl.style.textShadow = 'none';
    } else {
        if(!state.st.col) state.st.col = '#FFFFFF'; if(!state.st.bg) state.st.bg = '#000000';
        tEl.style.color = state.st.col;
        
        // Apply box style to the container
        tEl.style.padding = `${state.st.paddingY}px ${state.st.paddingX}px`;
        tEl.style.borderRadius = `${state.st.radius}px`;

        if(state.st.type === 'solid' || state.st.type === 'transparent') {
            let bgColor = state.st.bg;
            if (state.st.type === 'transparent') {
                if(bgColor.startsWith('#') && bgColor.length === 7) {
                    let r = parseInt(bgColor.substring(1, 3), 16); let g = parseInt(bgColor.substring(3, 5), 16); let b = parseInt(bgColor.substring(5, 7), 16);
                    bgColor = `rgba(${r},${g},${b},0.6)`;
                } else if(bgColor.startsWith('rgba')) {
                    bgColor = bgColor.replace(/[\d.]+\)$/, '0.6)'); 
                }
            }
            tEl.style.backgroundColor = bgColor;
            tEl.style.webkitTextStroke = '0px'; tEl.style.textShadow = 'none';
        } else if (state.st.type === 'outline') {
            tEl.style.backgroundColor = 'transparent';
            const s = Math.max(3, state.st.fz / 4.5); tEl.style.webkitTextStroke = `${s}px ${state.st.bg}`;
            tEl.style.paintOrder = 'stroke fill'; tEl.style.webkitPaintOrder = 'stroke fill';
            tEl.style.textShadow = 'none';
        } else {
            tEl.style.backgroundColor = 'transparent'; tEl.style.webkitTextStroke = '0px'; tEl.style.textShadow = 'none';
        }
    }

    const boxPreview = document.getElementById('boxPreview');
    const boxControlsPanel = document.getElementById('boxControlsPanel');

    if (boxControlsPanel) {
        const isBoxStyleActive = ['solid', 'transparent'].includes(state.st.type) || ['karaoke_static', 'auto_director'].includes(state.st.name);
        boxControlsPanel.style.display = isBoxStyleActive ? 'block' : 'none';

        if (isBoxStyleActive && boxPreview) {
            boxPreview.style.borderRadius = `${state.st.radius}px`;
            boxPreview.style.padding = `${state.st.paddingY}px ${state.st.paddingX}px`;
            let previewColor = state.st.name === 'karaoke_static' ? state.st.col : state.st.bg;
            boxPreview.style.backgroundColor = previewColor;
        }
    }
}

function resegmentByWordCount(count) {
    let allWords = [];
    state.segs.forEach(s => {
        if(s.words) allWords.push(...s.words);
    });

    if(allWords.length === 0) return;

    let newSegs = [];
    for (let i = 0; i < allWords.length; i += count) {
        let chunk = allWords.slice(i, i + count);
        let start = chunk[0].start;
        let end = chunk[chunk.length - 1].end;
        let text = chunk.map(w => w.word).join(' ');
        
        newSegs.push({
            id: Date.now() + i,
            start: start,
            end: end,
            text: text,
            words: chunk,
            isHidden: false
        });
    }

    state.segs = newSegs;
    renderSegList();
    upd();
    saveProjectToDB();
    closeAllSheets();
    showToast(`هر جمله شامل ${count} کلمه شد`, "fa-solid fa-list-ol");
}


function updateColorPreviewButtons() {
    const mainBtn = document.getElementById('preview-main-btn');
    if(mainBtn && state.st.col) mainBtn.style.backgroundColor = state.st.col;
    const bgBtn = document.getElementById('preview-bg-btn');
    if(bgBtn && state.st.bg) bgBtn.style.backgroundColor = state.st.bg;
}

function setStylePreset(name, el, skipModeSet = false) { 
    state.st.name = name; 
    document.querySelectorAll('.style-card').forEach(c => c.classList.remove('selected')); 
    if(el) el.classList.add('selected'); 
    
    if(name === 'karaoke_static' && !skipModeSet) { 
        const defaultPurple = '#A020F0'; state.st.col = defaultPurple; 
        document.documentElement.style.setProperty('--static-color', defaultPurple); 
    }
    
    if(name === 'classic' && !skipModeSet) setMode('solid'); 
    else if (name === 'progressive_write') setMode('none');
    else if (name === 'plain_white' || name === 'white_outline') { 
        state.st.col = '#FFFFFF'; state.st.bg = '#000000'; 
        setMode('outline'); 
    }
    upd(); 
}

function handleClassicDoubleClick(element) {
    event.stopPropagation();
    activateCustomStyle();
    setStylePreset('classic', element, true);
    setMode('none');
}

function setFont(f, el) { document.querySelectorAll('.font-btn').forEach(btn => btn.classList.remove('ticked')); el.classList.add('ticked'); state.st.f = f; upd(); }
function setMode(m) { state.st.type = m; syncModeButtons(); upd(); }

function openColorPicker(target, ev) { 
    if (ev) ev.stopPropagation(); 
    currentTarget = target; 
    document.getElementById('pickerBackdrop').classList.add('active'); 
    document.getElementById('colorPickerModal').classList.add('active'); 
    
    let hex = '#FFFFFF'; 
    if(target === 'main') hex = state.st.col; 
    else if(target === 'bg') hex = state.st.bg; 
    else if(target === 'static') hex = state.st.col; 
    else if(target === 'word') {
        if(activeWordId) {
            const [s, w] = activeWordId.split('-').map(Number);
            const wordObj = state.segs[s].words[w];
            hex = wordObj.color || state.st.col;
        } else {
            hex = state.st.col;
        }
    }

    let parsed = parseColorStringToState(hex || '#FFFFFF'); 
    pickerState = parsed; 
    switchTab('spectrum'); 
    syncAllUI(); 
    syncGridSelectedFromCurrentColor(); 
}
function closePicker() { document.getElementById('colorPickerModal').classList.remove('active'); document.getElementById('pickerBackdrop').classList.remove('active'); }
function saveAndClosePicker() { 
    const rgb = hsvToRgb(pickerState.h, pickerState.s, pickerState.v); 
    let colorStr; 
    if (pickerState.a >= 100) { colorStr = rgbToHex(rgb.r, rgb.g, rgb.b); } else { colorStr = `rgba(${rgb.r}, ${rgb.g}, ${rgb.b}, ${pickerState.a/100})`; } 
    
    if (currentTarget === 'main') state.st.col = colorStr; 
    else if (currentTarget === 'bg') state.st.bg = colorStr; 
    else if (currentTarget === 'static') { state.st.col = colorStr; document.documentElement.style.setProperty('--static-color', colorStr); } 
    else if (currentTarget === 'word' && activeWordId) {
        const [s, w] = activeWordId.split('-').map(Number);
        state.segs[s].words[w].color = colorStr;
        updateOverlayContent(v.currentTime); // آپدیت آنی پیش‌نمایش
    }
    
    upd(); 
    closePicker(); 
}
const spectrumAreaP = document.getElementById('spectrumArea'); const spectrumHandleP = document.getElementById('spectrumHandle'); const slBrightP = document.getElementById('brightness-slider'); const slAlphaP = document.getElementById('alpha-slider'); const previewBoxP = document.getElementById('largeColorPreview'); const gridContP = document.getElementById('gridContainer');
function switchTab(name) { document.querySelectorAll('.picker-tab').forEach(t => t.classList.remove('active')); document.getElementById('tab-' + name).classList.add('active'); document.querySelectorAll('.view-section').forEach(v => v.classList.remove('active-view')); document.getElementById('view-' + name).classList.add('active-view'); const brRow = document.getElementById('brightness-row'); if(brRow) brRow.style.display = (name === 'manual') ? 'none' : 'flex'; syncAllUI(); if(name === 'grid') syncGridSelectedFromCurrentColor(); }
function handleSpectrum(e) { if(!spectrumAreaP) return; const rect = spectrumAreaP.getBoundingClientRect(); let x = Math.max(0, Math.min(e.clientX - rect.left, rect.width)); let y = Math.max(0, Math.min(e.clientY - rect.top, rect.height)); spectrumHandleP.style.left = x + 'px'; spectrumHandleP.style.top = y + 'px'; pickerState.h = (x / rect.width) * 360; pickerState.s = 100 - ((y / rect.height) * 100); syncAllUI(); syncGridSelectedFromCurrentColor(); }
if(spectrumAreaP) { spectrumAreaP.addEventListener('mousedown', e => { isDraggingSpectrum = true; handleSpectrum(e); }); window.addEventListener('mousemove', e => { if(isDraggingSpectrum) handleSpectrum(e); }); window.addEventListener('mouseup', () => isDraggingSpectrum = false); spectrumAreaP.addEventListener('touchstart', e => { isDraggingSpectrum = true; handleSpectrum(e.touches[0]); }, { passive:false }); window.addEventListener('touchmove', e => { if(isDraggingSpectrum) { e.preventDefault(); handleSpectrum(e.touches[0]); } }, { passive:false }); window.addEventListener('touchend', () => isDraggingSpectrum = false); }
function updateBrightness() { pickerState.v = parseInt(slBrightP.value, 10); syncAllUI(); syncGridSelectedFromCurrentColor(); }
function updateAlpha() { pickerState.a = parseInt(slAlphaP.value, 10); syncAllUI(); }
function updateRGBFromSliders() { const r = parseInt(document.getElementById('slider-r').value, 10); const g = parseInt(document.getElementById('slider-g').value, 10); const b = parseInt(document.getElementById('slider-b').value, 10); updateFromRGB(r, g, b); }
function updateRGBFromInputs() { const r = Math.min(255, Math.max(0, parseInt(document.getElementById('input-r').value, 10) || 0)); const g = Math.min(255, Math.max(0, parseInt(document.getElementById('input-g').value, 10) || 0)); const b = Math.min(255, Math.max(0, parseInt(document.getElementById('input-b').value, 10) || 0)); updateFromRGB(r, g, b); }
function updateFromRGB(r, g, b) { const hsv = rgbToHsv(r, g, b); pickerState.h = hsv.h; pickerState.s = hsv.s; pickerState.v = hsv.v; syncAllUI(); syncGridSelectedFromCurrentColor(); }
function updateFromHexInput() { let val = document.getElementById('input-hex').value.trim(); if(val.startsWith('#')) val = val.substring(1); if(/^[0-9A-Fa-f]{6}$/.test(val) || /^[0-9A-Fa-f]{3}$/.test(val)) { const rgb = hexToRgb('#'+val); const hsv = rgbToHsv(rgb.r,rgb.g,rgb.b); pickerState.h = hsv.h; pickerState.s = hsv.s; pickerState.v = hsv.v; pickerState.a = 100; syncAllUI(); syncGridSelectedFromCurrentColor(); } }
function syncAllUI() { const rgb = hsvToRgb(pickerState.h, pickerState.s, pickerState.v); const hex = rgbToHex(rgb.r, rgb.g, rgb.b); const rgba = `rgba(${rgb.r},${rgb.g},${rgb.b},${pickerState.a/100})`; const slR = document.getElementById('slider-r'), inR = document.getElementById('input-r'); const slG = document.getElementById('slider-g'), inG = document.getElementById('input-g'); const slB = document.getElementById('slider-b'), inB = document.getElementById('input-b'); const inHex = document.getElementById('input-hex'); slR.value = inR.value = rgb.r; slG.value = inG.value = rgb.g; slB.value = inB.value = rgb.b; if(document.activeElement !== inHex) inHex.value = hex.replace('#','').toUpperCase(); slR.style.setProperty('--track-bg', `linear-gradient(90deg, rgb(0,${rgb.g},${rgb.b}), rgb(255,${rgb.g},${rgb.b}))`); slG.style.setProperty('--track-bg', `linear-gradient(90deg, rgb(${rgb.r},0,${rgb.b}), rgb(${rgb.r},255,${rgb.b}))`); slB.style.setProperty('--track-bg', `linear-gradient(90deg, rgb(${rgb.r},${rgb.g},0), rgb(${rgb.r},${rgb.g},255))`); slBrightP.value = Math.round(pickerState.v); document.getElementById('disp-brightness').innerText = Math.round(pickerState.v); const brightColor = hsvToRgb(pickerState.h, pickerState.s, 100); slBrightP.style.setProperty('--track-bg', `linear-gradient(90deg, #000000, rgb(${brightColor.r},${brightColor.g},${brightColor.b}))`); slAlphaP.value = Math.round(pickerState.a); document.getElementById('disp-alpha').innerText = Math.round(pickerState.a); slAlphaP.style.setProperty('--track-bg', `linear-gradient(90deg, rgba(${rgb.r},${rgb.g},${rgb.b},0), rgba(${rgb.r},${rgb.g},${rgb.b},1))`); if(previewBoxP) { previewBoxP.style.background = `linear-gradient(0deg, ${rgba}, ${rgba}), conic-gradient(#dedede 0.25turn, #ffffff 0.25turn 0.5turn, #dedede 0.5turn 0.75turn, #ffffff 0.75turn) top left / 16px 16px`; } if(!isDraggingSpectrum && spectrumHandleP) { spectrumHandleP.style.left = (pickerState.h / 360 * 100) + '%'; spectrumHandleP.style.top = (100 - pickerState.s) + '%'; } }
function rgbToHex(r,g,b) { r=Math.round(r);g=Math.round(g);b=Math.round(b); return "#" + ((1<<24)+(r<<16)+(g<<8)+b).toString(16).slice(1).toUpperCase(); }
function hexToRgb(hex) { hex = (hex||'#000').replace('#','').trim(); if(hex.length===3) hex=hex.split('').map(c=>c+c).join(''); if(hex.length!==6) return {r:0,g:0,b:0}; return {r:parseInt(hex.substring(0,2),16),g:parseInt(hex.substring(2,4),16),b:parseInt(hex.substring(4,6),16)}; }
function hsvToRgb(h,s,v){ s/=100;v/=100; let c=v*s; let x=c*(1-Math.abs(((h/60)%2)-1)); let m=v-c; let r=0,g=0,b=0; if(h<60){r=c;g=x;}else if(h<120){r=x;g=c;}else if(h<180){g=c;b=x;}else if(h<240){g=x;b=c;}else if(h<300){r=x;b=c;}else{r=c;b=x;} return {r:Math.round((r+m)*255),g:Math.round((g+m)*255),b:Math.round((b+m)*255)}; }
function rgbToHsv(r,g,b){ r/=255;g/=255;b/=255; let max=Math.max(r,g,b), min=Math.min(r,g,b), d=max-min, h=0, s=max===0?0:d/max, v=max; if(d!==0){ switch(max){ case r: h=(g-b)/d+(g<b?6:0);break; case g: h=(b-r)/d+2;break; case b: h=(r-g)/d+4;break;} h*=60;} return {h,s:s*100,v:v*100}; }
function parseColorStringToState(colorStr) { colorStr = colorStr.trim(); let r=255, g=255, b=255, a=100; if(colorStr.startsWith('#')) { let rgb = hexToRgb(colorStr); r=rgb.r; g=rgb.g; b=rgb.b; } else if(colorStr.startsWith('rgb')) { let parts = colorStr.match(/[\d.]+/g); if(parts && parts.length>=3) { r = parseFloat(parts[0]); g = parseFloat(parts[1]); b = parseFloat(parts[2]); if(parts.length > 3) a = Math.round(parseFloat(parts[3]) * 100); } } const hsv = rgbToHsv(r,g,b); return { h:hsv.h, s:hsv.s, v:hsv.v, a:a }; }
function initSavedColors() { const s = localStorage.getItem('mySavedColors'); if(s) { try{savedColors=JSON.parse(s)||[];}catch(e){savedColors=[];} } renderSavedColors(); }
function saveCurrentColor() { const rgb = hsvToRgb(pickerState.h, pickerState.s, pickerState.v); const hex = rgbToHex(rgb.r, rgb.g, rgb.b); savedColors.push(hex); localStorage.setItem('mySavedColors', JSON.stringify(savedColors)); renderSavedColors(); showToast("این رنگ در حافظه رنگ‌ها ذخیره شد", "fa-solid fa-save"); }
function renderSavedColors(){ const c = document.getElementById('savedColorsContainer'); if(!c) return; const svBtn = c.querySelector('.btn-save-text'); while(svBtn.nextSibling) svBtn.nextSibling.remove(); savedColors.forEach((hex, idx) => { const w = document.createElement('div'); w.className='saved-color-wrapper'; w.innerHTML = `<div class="saved-circle" style="background-color:${hex}"></div><div class="mini-delete-btn"><i class="fa-solid fa-xmark"></i></div>`; w.querySelector('.saved-circle').onclick = () => { let parsed = parseColorStringToState(hex); pickerState=parsed; syncAllUI(); syncGridSelectedFromCurrentColor(); }; w.querySelector('.mini-delete-btn').onclick = (e) => { e.stopPropagation(); currentDeleteIndex=idx; document.getElementById('delColorPreview').style.backgroundColor=hex; document.getElementById('deleteModal').classList.add('active'); }; c.appendChild(w); }); }
function showToast(message = "این رنگ در حافظه رنگ‌ها ذخیره شد", iconClass = "fa-solid fa-circle-check") { const t=document.getElementById('toastNotification'); if (!t) return; const span = t.querySelector('span'); const icon = t.querySelector('i'); if(span) span.innerText = message; if(icon) icon.className = iconClass; t.classList.add('show'); clearTimeout(toastTimeout); toastTimeout=setTimeout(()=>t.classList.remove('show'),2200); }
function confirmDelete(){ if(currentDeleteIndex>-1) { savedColors.splice(currentDeleteIndex,1); localStorage.setItem('mySavedColors',JSON.stringify(savedColors)); renderSavedColors(); } closeDeleteModal(); }
function closeDeleteModal(){ document.getElementById('deleteModal').classList.remove('active'); currentDeleteIndex=-1; }
function generateGridPalette() { const colors = ['#FFFFFF','#F2F2F7','#E5E5EA','#D1D1D6','#C7C7CC','#AEAEB2','#8E8E93','#636366','#48484A','#3A3A3C','#2C2C2E','#1C1C1E','#000000','#FF3B30','#FF453A','#FF9500','#FF9F0A','#FFD60A','#FFCC00','#34C759','#30D158','#00C7BE','#64D2FF','#32ADE6','#0A84FF','#007AFF','#5E5CE6','#5856D6','#AF52DE','#BF5AF2','#FF2D55']; for(let i=0;i<=20;i++){ let v=Math.round(i/20*255); colors.push(rgbToHex(v,v,v)); } for(let h=0;h<360;h+=12){ for(let s of [92,72]) for(let v of [100,85,70]) { colors.push(rgbToHex(hsvToRgb(h,s,v).r,hsvToRgb(h,s,v).g,hsvToRgb(h,s,v).b)); } } return [...new Set(colors)]; }
function renderGridWithData(colors){ if(!gridContP) return; gridContP.innerHTML=''; colors.forEach(hex => { const d = document.createElement('div'); d.className='grid-item'; d.style.backgroundColor=hex; d.setAttribute('data-hex', hex.toUpperCase()); d.onclick=()=>{ document.querySelectorAll('.grid-item').forEach(x=>x.classList.remove('selected')); d.classList.add('selected'); let parsed=parseColorStringToState(hex); pickerState=parsed; syncAllUI(); }; gridContP.appendChild(d); }); }
function syncGridSelectedFromCurrentColor() { if(!gridContP) return; const rgb = hsvToRgb(pickerState.h, pickerState.s, pickerState.v); const hex = rgbToHex(rgb.r,rgb.g,rgb.b).toUpperCase(); const items = gridContP.querySelectorAll('.grid-item'); items.forEach(it => { if(it.getAttribute('data-hex')===hex) it.classList.add('selected'); else it.classList.remove('selected'); }); }