// 전역 변수
let currentPrices = {};
let userAssets = [];
let alertSettings = {};

// 자산 목록 (고정 리스트)
const ASSET_SYMBOLS = [
    'XAU/USD', 'XAU/CNY', 'XAU/GBP', 'USD/DXY', 'USD/KRW',
    'BTC/KRW', 'BTC/USD', 'KRX/GLD', 'XAU/KRW'
];

// 상세 페이지 주소 매핑
function getInvestingUrl(symbol) {
    const mapping = {
        'XAU/USD': 'https://kr.investing.com/currencies/xau-usd',
        'XAU/CNY': 'https://kr.investing.com/currencies/xau-cny',
        'XAU/GBP': 'https://kr.investing.com/currencies/xau-gbp',
        'USD/DXY': 'https://kr.investing.com/indices/usdollar',
        'USD/KRW': 'https://kr.investing.com/currencies/usd-krw',
        'BTC/USD': 'https://www.binance.com/en/trade/BTC_USD?type=spot',
        'BTC/KRW': 'https://upbit.com/exchange?code=CRIX.UPBIT.KRW-BTC',
        'KRX/GLD': 'https://m.stock.naver.com/marketindex/metals/M04020000',
        'XAU/KRW': 'https://kr.investing.com/currencies/xau-krw'
    };
    return mapping[symbol] || '';
}

// 초기화
document.addEventListener('DOMContentLoaded', () => {
    loadAssets();
    loadAlertSettings();
    startPriceStream();
    
    document.getElementById('refresh-btn').addEventListener('click', refreshData);
    document.getElementById('alert-settings-btn').addEventListener('click', openAlertModal);
    document.querySelector('.close').addEventListener('click', closeAlertModal);
    document.getElementById('save-alerts').addEventListener('click', saveAlertSettings);
    document.getElementById('cancel-alerts').addEventListener('click', closeAlertModal);
});

async function loadAssets() {
    try {
        const response = await fetch('/api/assets');
        userAssets = await response.json();
        renderAssetsTable();
    } catch (error) {
        console.error('자산 로드 실패:', error);
    }
}

async function loadAlertSettings() {
    try {
        const response = await fetch('/api/alerts/settings');
        alertSettings = await response.json();
    } catch (error) {
        console.error('알림 설정 로드 실패:', error);
    }
}

function startPriceStream() {
    const eventSource = new EventSource('/api/stream');
    eventSource.onmessage = (event) => {
        currentPrices = JSON.parse(event.data);
        updatePricesInTable();
        calculatePnLRealtime();
        updateLastUpdateTime();
        document.getElementById('status-indicator').style.backgroundColor = '#10b981';
    };
    eventSource.onerror = () => {
        document.getElementById('status-indicator').style.backgroundColor = '#ef4444';
    };
}

// 테이블 뼈대 생성
function renderAssetsTable() {
    const tbody = document.getElementById('assets-tbody');
    tbody.innerHTML = '';
    
    ASSET_SYMBOLS.forEach(symbol => {
        const asset = userAssets.find(a => a.symbol === symbol) || {
            symbol: symbol, previous_close: 0, average_price: 0, quantity: 0
        };
        
        const row = document.createElement('tr');
        row.dataset.symbol = symbol;
        row.innerHTML = `
            <td><a href="${getInvestingUrl(symbol)}" target="_blank" class="investing-btn">${symbol}</a></td>
            <td class="numeric"><input type="number" class="prev-close" value="${asset.previous_close}" step="0.01" data-symbol="${symbol}"></td>
            <td class="numeric current-price">Loading...</td>
            <td class="numeric change">0</td>
            <td class="numeric change-percent">0%</td>
            <td class="numeric"><input type="number" class="avg-price" value="${asset.average_price}" step="0.01" data-symbol="${symbol}"></td>
            <td class="numeric"><input type="number" class="quantity" value="${asset.quantity}" step="${symbol.includes('BTC') ? '0.00000001' : '0.01'}" data-symbol="${symbol}"></td>
            <td class="numeric buy-total">0</td>
        `;
        tbody.appendChild(row);

        // 프리미엄 행 삽입
        if (symbol === 'BTC/USD') {
            insertPremiumRow(tbody, 'BTC_PREMIUM', '📊 BTC 프리미엄 (김프)');
        } else if (symbol === 'XAU/KRW') {
            insertPremiumRow(tbody, 'GOLD_PREMIUM', '✨ GOLD 프리미엄 (국내외차)');
        }
    });
    
    document.querySelectorAll('#assets-tbody input[type="number"]').forEach(input => {
        input.addEventListener('change', (e) => {
            handleAssetChange(e);
            updatePricesInTable();
        });
    });
}

function insertPremiumRow(tbody, id, label) {
    const row = document.createElement('tr');
    row.id = id;
    row.className = 'premium-row';
    row.innerHTML = `
        <td style="color: #6366f1; font-weight: bold; background-color: #f8fafc;">${label}</td>
        <td class="numeric" style="background-color: #f8fafc;">-</td>
        <td class="numeric premium-value" style="font-weight: bold; background-color: #f8fafc;">계산중...</td>
        <td class="numeric premium-diff" colspan="2" style="background-color: #f8fafc; font-weight: bold;">-</td>
        <td colspan="3" style="background-color: #f8fafc;"></td>
    `;
    tbody.appendChild(row);
}

// 실시간 가격 및 색상 업데이트 핵심 로직
function updatePricesInTable() {
    const rows = document.querySelectorAll('#assets-tbody tr:not(.premium-row)');
    const usdKrw = currentPrices['USD/KRW']?.가격 || 0;

    rows.forEach(row => {
        const symbol = row.dataset.symbol;
        const priceData = currentPrices[symbol];
        if (!priceData || !priceData.가격) return;
        
        const currentPrice = priceData.가격;
        const decimalPlaces = (symbol.includes('USD') || symbol.includes('DXY')) ? 2 : 0;
        const prevClose = parseFloat(row.querySelector('.prev-close').value) || 0;
        
        const currentPriceCell = row.querySelector('.current-price');
        currentPriceCell.textContent = formatNumber(currentPrice, decimalPlaces);
        
        const change = currentPrice - prevClose;
        const changePercent = prevClose > 0 ? (change / prevClose * 100) : 0;
        
        const changeCell = row.querySelector('.change');
        const changePercentCell = row.querySelector('.change-percent');
        
        changeCell.textContent = formatNumber(change, decimalPlaces);
        changePercentCell.textContent = `${formatNumber(changePercent, 2)}%`;

        const cellsToColor = [currentPriceCell, changeCell, changePercentCell];
        cellsToColor.forEach(cell => {
            cell.classList.remove('price-up', 'price-down');
            if (prevClose > 0) {
                if (change > 0) cell.classList.add('price-up');
                else if (change < 0) cell.classList.add('price-down');
            }
        });
        
        const avgPrice = parseFloat(row.querySelector('.avg-price').value) || 0;
        const quantity = parseFloat(row.querySelector('.quantity').value) || 0;
        row.querySelector('.buy-total').textContent = formatNumber(avgPrice * quantity, 0);
    });

    // --- 프리미엄 계산 로직 (수정 완료) ---
    if (usdKrw > 0) {
        // 1. BTC 프리미엄
        const btcKrw = currentPrices['BTC/KRW']?.가격;
        const btcUsd = currentPrices['BTC/USD']?.가격;
        if (btcKrw && btcUsd) {
            const btcGlobalInKrw = btcUsd * usdKrw;
            const btcPrem = btcKrw - btcGlobalInKrw;
            const btcPremPct = (btcPrem / btcGlobalInKrw) * 100;
            
            const btcRow = document.getElementById('BTC_PREMIUM');
            const valCell = btcRow.querySelector('.premium-value');
            const diffCell = btcRow.querySelector('.premium-diff');
            
            valCell.textContent = `${formatNumber(btcPrem, 0)}`;
            diffCell.textContent = `(차이: ${formatNumber(btcPremPct, 2)}%)`;
            
            [valCell, diffCell].forEach(cell => {
                cell.classList.remove('price-up', 'price-down');
                if (btcPrem > 0) cell.classList.add('price-up');
                else if (btcPrem < 0) cell.classList.add('price-down');
            });
        }

        // 2. GOLD 프리미엄
        const krxGold = currentPrices['KRX/GLD']?.가격;
        const xauUsd = currentPrices['XAU/USD']?.가격;
        if (krxGold && xauUsd) {
            const goldGlobalInKrw = (xauUsd / 31.1035) * usdKrw;
            const goldPrem = krxGold - goldGlobalInKrw;
            const goldPremPct = (goldPrem / goldGlobalInKrw) * 100;

            const goldRow = document.getElementById('GOLD_PREMIUM');
            const valCell = goldRow.querySelector('.premium-value');
            const diffCell = goldRow.querySelector('.premium-diff');

            valCell.textContent = `${formatNumber(goldPrem, 0)}`;
            diffCell.textContent = `(차이: ${formatNumber(goldPremPct, 2)}%)`;

            [valCell, diffCell].forEach(cell => {
                cell.classList.remove('price-up', 'price-down');
                if (goldPrem > 0) cell.classList.add('price-up');
                else if (goldPrem < 0) cell.classList.add('price-down');
            });
        }
    }
}

function calculatePnLRealtime() {
    let totalBuy = 0, totalCurrentValue = 0;
    let goldBuy = 0, goldCurrent = 0;
    let btcBuy = 0, btcCurrent = 0;
    const usdKrw = currentPrices['USD/KRW']?.가격 || 1400;

    const rows = document.querySelectorAll('#assets-tbody tr:not(.premium-row)');
    rows.forEach(row => {
        const symbol = row.dataset.symbol;
        const priceData = currentPrices[symbol];
        if (!priceData) return;

        const currentPrice = priceData.가격;
        const avgPrice = parseFloat(row.querySelector('.avg-price').value) || 0;
        const quantity = parseFloat(row.querySelector('.quantity').value) || 0;

        let buyValue = avgPrice * quantity;
        let currentValue = currentPrice * quantity;

        if (symbol.includes('USD') && symbol !== 'USD/KRW') {
            buyValue *= usdKrw; currentValue *= usdKrw;
        }

        totalBuy += buyValue; totalCurrentValue += currentValue;
        if (symbol.includes('XAU') || symbol.includes('GLD')) {
            goldBuy += buyValue; goldCurrent += currentValue;
        } else if (symbol.includes('BTC')) {
            btcBuy += buyValue; btcCurrent += currentValue;
        }
    });

    updatePnLCard('total-pnl', 'total-percent', totalCurrentValue - totalBuy, totalBuy > 0 ? ((totalCurrentValue - totalBuy) / totalBuy * 100) : 0);
    updatePnLCard('gold-pnl', 'gold-percent', goldCurrent - goldBuy, goldBuy > 0 ? ((goldCurrent - goldBuy) / goldBuy * 100) : 0);
    updatePnLCard('btc-pnl', 'btc-percent', btcCurrent - btcBuy, btcBuy > 0 ? ((btcCurrent - btcBuy) / btcBuy * 100) : 0);
}

function updatePnLCard(valueId, percentId, value, percent) {
    const valueElem = document.getElementById(valueId);
    const percentElem = document.getElementById(percentId);
    if (!valueElem || !percentElem) return;
    valueElem.textContent = formatNumber(value, 0) + ' 원';
    percentElem.textContent = formatNumber(percent, 2) + '%';
    const stateClass = value > 0 ? 'profit' : value < 0 ? 'loss' : '';
    valueElem.className = `pnl-value ${stateClass}`;
    percentElem.className = `pnl-percent ${stateClass}`;
}

async function handleAssetChange(event) {
    const input = event.target;
    const symbol = input.dataset.symbol;
    const row = input.closest('tr');
    const data = {
        symbol,
        previous_close: parseFloat(row.querySelector('.prev-close').value) || 0,
        average_price: parseFloat(row.querySelector('.avg-price').value) || 0,
        quantity: parseFloat(row.querySelector('.quantity').value) || 0
    };
    try {
        await fetch('/api/assets', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(data)
        });
        calculatePnLRealtime();
    } catch (error) { console.error('업데이트 실패:', error); }
}

function openAlertModal() {
    document.getElementById('급등락_감지').checked = alertSettings.급등락_감지 || false;
    document.getElementById('급등락_임계값').value = alertSettings.급등락_임계값 || 3.0;
    document.getElementById('목표수익률_감지').checked = alertSettings.목표수익률_감지 || false;
    document.getElementById('목표수익률').value = alertSettings.목표수익률 || 10.0;
    document.getElementById('특정가격_감지').checked = alertSettings.특정가격_감지 || false;
    document.getElementById('금_목표가격').value = alertSettings.금_목표가격 || 100000;
    document.getElementById('BTC_목표가격').value = alertSettings.BTC_목표가격 || 100000000;
    document.getElementById('alert-modal').classList.add('active');
}

function closeAlertModal() { document.getElementById('alert-modal').classList.remove('active'); }

async function saveAlertSettings() {
    const settings = {
        급등락_감지: document.getElementById('급등락_감지').checked,
        급등락_임계값: parseFloat(document.getElementById('급등락_임계값').value),
        목표수익률_감지: document.getElementById('목표수익률_감지').checked,
        목표수익률: parseFloat(document.getElementById('목표수익률').value),
        특정가격_감지: document.getElementById('특정가격_감지').checked,
        금_목표가격: parseInt(document.getElementById('금_목표가격').value),
        BTC_목표가격: parseInt(document.getElementById('BTC_목표가격').value)
    };
    try {
        const response = await fetch('/api/alerts/settings', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({ settings })
        });
        if (response.ok) { alertSettings = settings; closeAlertModal(); }
    } catch (error) { console.error('알림 설정 저장 실패:', error); }
}

async function refreshData() { await loadAssets(); }

function updateLastUpdateTime() {
    document.getElementById('last-update').textContent = `마지막 업데이트: ${new Date().toLocaleTimeString('ko-KR')}`;
}

function formatNumber(value, decimals = 0) {
    if (value === null || value === undefined || isNaN(value)) return 'N/A';
    return value.toLocaleString('ko-KR', { minimumFractionDigits: decimals, maximumFractionDigits: decimals });
}

window.addEventListener('click', (e) => { if (e.target === document.getElementById('alert-modal')) closeAlertModal(); });