feat: İhaleist - Akıllı İhale Takip ve Analiz Platformu (Full PRD + 7 Enterprise Modül)
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import React, { useState } from 'react';
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import { Calculator, Copy, Check } from 'lucide-react';
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export const VatCalculator = () => {
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const [mode, setMode] = useState('haric'); // 'haric' (net to gross) or 'dahil' (gross to net)
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const [amount, setAmount] = useState(100000);
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const [vatRate, setVatRate] = useState(20); // 1, 10, 20
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const [tevkifatRate, setTevkifatRate] = useState(0); // 0, 50 (5/10), 70 (7/10), 90 (9/10)
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const [copied, setCopied] = useState(false);
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// Calculations
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let netAmount = 0;
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let vatAmount = 0;
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let grossAmount = 0;
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let tevkifatAmount = 0;
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let payableVat = 0;
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if (mode === 'haric') {
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netAmount = Number(amount) || 0;
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vatAmount = netAmount * (vatRate / 100);
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grossAmount = netAmount + vatAmount;
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} else {
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grossAmount = Number(amount) || 0;
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netAmount = grossAmount / (1 + vatRate / 100);
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vatAmount = grossAmount - netAmount;
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}
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if (tevkifatRate > 0) {
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tevkifatAmount = vatAmount * (tevkifatRate / 100);
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payableVat = vatAmount - tevkifatAmount;
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} else {
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payableVat = vatAmount;
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}
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const handleCopy = () => {
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const summary = `Matrah: ₺${netAmount.toLocaleString('tr-TR', { maximumFractionDigits: 2 })} | KDV (%${vatRate}): ₺${vatAmount.toLocaleString('tr-TR', { maximumFractionDigits: 2 })} | Genel Toplam: ₺${grossAmount.toLocaleString('tr-TR', { maximumFractionDigits: 2 })}`;
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navigator.clipboard.writeText(summary);
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setCopied(true);
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setTimeout(() => setCopied(false), 2000);
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};
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return (
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<div className="max-w-3xl mx-auto my-4 space-y-4 animate-fade-in">
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<div className="bg-white rounded-xl border border-slate-200 p-5 shadow-xs flex items-center justify-between">
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<div className="flex items-center gap-3">
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<div className="w-10 h-10 rounded-xl bg-blue-600 text-white flex items-center justify-center shadow-md">
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<Calculator className="w-6 h-6" />
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</div>
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<div>
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<h1 className="text-xl font-black text-slate-900">İhale KDV & Tevkifat Hesaplayıcı</h1>
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<p className="text-xs text-slate-500">Teklif matrahından KDV dahil tutarı veya KDV dahilden net matrahı hesaplayın.</p>
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</div>
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</div>
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</div>
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<div className="bg-white rounded-2xl border border-slate-200 p-6 shadow-xs space-y-6">
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{/* Mode Selector */}
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<div className="grid grid-cols-2 gap-3 p-1 bg-slate-100 rounded-xl">
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<button
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onClick={() => setMode('haric')}
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className={`py-2.5 rounded-lg text-xs font-extrabold transition-all ${
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mode === 'haric' ? 'bg-white text-blue-700 shadow-2xs' : 'text-slate-600 hover:text-slate-900'
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}`}
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>
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KDV Hariç ➔ KDV Dahil Hesapla
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</button>
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<button
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onClick={() => setMode('dahil')}
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className={`py-2.5 rounded-lg text-xs font-extrabold transition-all ${
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mode === 'dahil' ? 'bg-white text-blue-700 shadow-2xs' : 'text-slate-600 hover:text-slate-900'
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}`}
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>
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KDV Dahil ➔ Matrah Hesapla
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</button>
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</div>
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{/* Inputs */}
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<div className="grid grid-cols-1 md:grid-cols-3 gap-4 text-xs">
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<div>
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<label className="block font-bold text-slate-700 mb-1.5">
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{mode === 'haric' ? 'Teklif Tutarı (KDV Hariç Matrah)' : 'KDV Dahil Toplam Tutar'}
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</label>
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<div className="relative">
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<input
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type="number"
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value={amount}
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onChange={(e) => setAmount(e.target.value)}
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className="w-full bg-slate-50 border border-slate-300 rounded-lg px-3 py-2.5 font-mono text-sm font-bold text-slate-900 focus:ring-2 focus:ring-blue-500"
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/>
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<span className="absolute right-3 top-1/2 -translate-y-1/2 text-slate-400 font-bold">TL</span>
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</div>
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</div>
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<div>
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<label className="block font-bold text-slate-700 mb-1.5">KDV Oranı</label>
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<div className="flex gap-1.5">
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{[1, 10, 20].map(rate => (
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<button
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key={rate}
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type="button"
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onClick={() => setVatRate(rate)}
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className={`flex-1 py-2 rounded-lg font-extrabold transition-colors border ${
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vatRate === rate ? 'bg-blue-600 text-white border-blue-600' : 'bg-slate-50 text-slate-700 border-slate-300 hover:bg-slate-100'
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}`}
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>
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%{rate}
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</button>
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))}
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</div>
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</div>
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<div>
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<label className="block font-bold text-slate-700 mb-1.5">Tevkifat Oranı (Varsa)</label>
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<select
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value={tevkifatRate}
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onChange={(e) => setTevkifatRate(Number(e.target.value))}
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className="w-full bg-slate-50 border border-slate-300 rounded-lg px-3 py-2.5 font-semibold text-slate-800"
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>
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<option value={0}>Tevkifat Yok</option>
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<option value={50}>5/10 Tevkifat (%50)</option>
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<option value={70}>7/10 Tevkifat (%70)</option>
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<option value={90}>9/10 Tevkifat (%90)</option>
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</select>
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</div>
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</div>
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{/* Results Card */}
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<div className="bg-slate-900 text-white p-6 rounded-xl space-y-4 shadow-lg">
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<div className="flex items-center justify-between border-b border-slate-800 pb-3">
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<span className="font-bold text-xs uppercase tracking-wider text-slate-300">Hesaplama Sonucu</span>
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<button
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onClick={handleCopy}
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className="bg-slate-800 hover:bg-slate-700 text-blue-400 font-semibold px-3 py-1.5 rounded-lg text-xs flex items-center gap-1.5 transition-colors border border-slate-700"
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>
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{copied ? <Check className="w-3.5 h-3.5 text-emerald-400" /> : <Copy className="w-3.5 h-3.5" />}
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<span>{copied ? 'Kopyalandı!' : 'Kopyala'}</span>
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</button>
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</div>
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<div className="grid grid-cols-1 sm:grid-cols-3 gap-4 text-xs">
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<div className="bg-white/5 p-3 rounded-lg border border-white/10">
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<span className="text-slate-400 font-medium block">Net Matrah (KDV Hariç)</span>
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<span className="text-lg font-black text-white mt-1 block">
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₺{netAmount.toLocaleString('tr-TR', { maximumFractionDigits: 2 })}
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</span>
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</div>
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<div className="bg-white/5 p-3 rounded-lg border border-white/10">
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<span className="text-slate-400 font-medium block">Hesaplanan KDV (%{vatRate})</span>
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<span className="text-lg font-black text-amber-400 mt-1 block">
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₺{vatAmount.toLocaleString('tr-TR', { maximumFractionDigits: 2 })}
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</span>
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</div>
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<div className="bg-white/5 p-3 rounded-lg border border-white/10">
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<span className="text-slate-400 font-medium block">Genel Toplam (KDV Dahil)</span>
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<span className="text-xl font-black text-emerald-400 mt-1 block">
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₺{grossAmount.toLocaleString('tr-TR', { maximumFractionDigits: 2 })}
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</span>
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</div>
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</div>
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{tevkifatRate > 0 && (
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<div className="bg-blue-950/80 p-3.5 rounded-lg border border-blue-800 text-xs flex justify-between">
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<span className="text-slate-300">Tevkifat Tutarı: <strong className="text-amber-300">₺{tevkifatAmount.toLocaleString('tr-TR', { maximumFractionDigits: 2 })}</strong></span>
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<span className="text-slate-300">Ödenecek KDV: <strong className="text-emerald-400">₺{payableVat.toLocaleString('tr-TR', { maximumFractionDigits: 2 })}</strong></span>
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</div>
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)}
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</div>
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</div>
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</div>
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);
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};
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