= 60 && w <= 75) return 150; return Math.round((w / 2) * 3.14 + 30); } else if (this.shape === 'lebih') { let arch = (w / 2) * 3.14; let straight = Math.max(0, (h - w / 2) * 2); let total = arch + straight + 30; if (total > 600) total += 30; return Math.round(total); } return 0; }, get totalMeter() { let q = parseInt(this.qty) || 1; return ((this.materialCm * q) / 100).toFixed(2); }, handleShape(s) { this.shape = s; let w = parseFloat(this.width) || 100; if (s === 'pas') { this.height = Math.round(w / 2); } else if (s === 'kurang') { this.height = Math.max(20, Math.floor(w / 2 - 15)); } else if (s === 'lebih') { this.height = Math.round(w / 2 + 50); } }, handleWidth(val) { this.width = val; let w = parseFloat(val) || 0; if (this.shape === 'pas' && w > 0) { this.height = Math.round(w / 2); } }, addItem() { let w = parseFloat(this.width); let h = parseFloat(this.height); let q = parseInt(this.qty) || 1; if (!w || w <= 0 || !h || h <= 0) { alert('Mohon masukkan ukuran lebar dan tinggi yang valid.'); return; } let shapeLabels = { kurang: 'Kurang dari ½ Lingkaran', pas: 'Setengah Lingkaran Pas', lebih: 'Lebih dari ½ Lingkaran (Arch)' }; this.items.push({ id: Date.now(), shapeName: shapeLabels[this.shape], width: w, height: h, product: this.product, qty: q, materialCm: this.materialCm, totalMeter: parseFloat(this.totalMeter) }); }, removeItem(id) { this.items = this.items.filter(it => it.id !== id); }, get grandTotalMeter() { return this.items.reduce((acc, curr) => acc + curr.totalMeter, 0).toFixed(2); }, get grandTotalPcs() { return this.items.reduce((acc, curr) => acc + curr.qty, 0); }, sendWhatsApp() { let company = 'Sugih Mitra Abadi'; let wa = '6287885126733'; let msg = 'Halo ' + company + ',\nSaya ingin meminta penawaran harga berdasarkan estimasi kalkulator:\n\n'; if (this.items.length > 0) { this.items.forEach((it, idx) => { msg += (idx + 1) + '. ' + it.product + ' (' + it.shapeName + ')\n'; msg += ' - Ukuran: ' + it.width + ' x ' + it.height + ' cm\n'; msg += ' - Jumlah: ' + it.qty + ' pcs\n'; msg += ' - Estimasi: ' + it.totalMeter + ' meter (' + it.materialCm + ' cm/pcs)\n\n'; }); msg += 'Total: ' + this.grandTotalPcs + ' pcs, ' + this.grandTotalMeter + ' meter material.\n\n'; } else { let shapeLabels = { kurang: 'Kurang dari ½ Lingkaran', pas: 'Setengah Lingkaran Pas', lebih: 'Lebih dari ½ Lingkaran' }; msg += 'Produk: ' + this.product + ' (' + shapeLabels[this.shape] + ')\n'; msg += 'Ukuran: ' + this.width + ' x ' + this.height + ' cm\n'; msg += 'Jumlah: ' + this.qty + ' pcs\n'; msg += 'Estimasi Material: ' + this.totalMeter + ' meter (' + this.materialCm + ' cm/pcs)\n\n'; } msg += 'Mohon info penawaran harga terbaik, warna finishing, dan estimasi waktu pengerjaan. Terima kasih!'; let url = 'https://wa.me/' + wa + '?text=' + encodeURIComponent(msg); window.open(url, '_blank'); } }">