/**
 * Asset Pilot - Frontend Logic (Integrated Watchdog Version)
 */

// 전역 변수 - 선임님 기존 변수명 유지
let currentPrices = {};
let userAssets = [];
let alertSettings = {};
let serverTimeOffset = 0; 

const ASSET_SYMBOLS = [
    'XAU/USD', 'XAU/CNY', 'XAU/GBP', 'USD/DXY', 'USD/KRW',
    'BTC/KRW', 'BTC/USD', 'KRX/GLD', 'XAU/KRW'
];

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] || '';
}

document.addEventListener('DOMContentLoaded', async () => {
    await Promise.all([loadAssets(), loadInitialPrices()]);
    
    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);

    setInterval(checkDataFreshness, 1000);
});

async function loadInitialPrices() {
    try {
        const response = await fetch('/api/prices');
        if (response.ok) {
            const result = await response.json();
            processPriceData(result);
        }
    } catch (error) { console.error('초기 가격 로드 실패:', error); }
}

function processPriceData(result) {
    currentPrices = result.prices || result; 
    
    if (result.fetch_status) {
        updateSystemStatus(result.fetch_status, result.last_heartbeat, result.server_time);
    }

    updatePricesInTable();
    calculatePnLRealtime();
}

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

function updateSystemStatus(status, lastHeartbeat, serverTimeStr) {
    const dot = document.getElementById('status-dot');
    const text = document.getElementById('status-text');
    const syncTime = document.getElementById('last-sync-time');

    if (dot && text) {
        if (status === 'healthy') {
            dot.className = "status-dot status-healthy";
            text.innerText = "데이터 수집 엔진 정상";
        } else {
            dot.className = "status-dot status-stale";
            text.innerText = "수집 지연 (Watchdog 감지)";
        }
    }

    if (syncTime && lastHeartbeat) {
        const hbTime = lastHeartbeat.split('T')[1].substring(0, 8);
        syncTime.innerText = `Last Heartbeat: ${hbTime}`;
    }
}

function checkDataFreshness() {
    const now = new Date();
    
    ASSET_SYMBOLS.forEach(symbol => {
        const priceData = currentPrices[symbol];
        if (!priceData || !priceData.업데이트) return;

        const updateTime = new Date(priceData.업데이트);
        const diffSeconds = Math.floor((now - updateTime) / 1000);
        
        const row = document.querySelector(`tr[data-symbol="${symbol}"]`);
        if (!row) return;

        const timeCell = row.querySelector('.update-time-cell');
        if (timeCell) {
            const timeStr = priceData.업데이트.split('T')[1].substring(0, 8);
            if (diffSeconds > 60) {
                timeCell.innerHTML = `<span style="color: #ef4444; font-weight:bold;">⚠️ ${timeStr}</span>`;
            } else {
                timeCell.innerText = timeStr;
                timeCell.style.color = '#666';
            }
        }
    });
}

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>
            <td class="numeric update-time-cell" style="font-size: 0.85em; color: #666;">-</td>
        `;
        tbody.appendChild(row);

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

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;

        // XAU/KRW일 경우, 서버가 보낸 KRX/GLD 가격을 '전일종가' input에 실시간 주입
        if (symbol === 'XAU/KRW' && currentPrices['KRX/GLD']) {
            const prevCloseInput = row.querySelector('.prev-close');
            // 사용자가 타이핑 중이 아닐 때만 업데이트 (포커스 체크)
            if (document.activeElement !== prevCloseInput) {
                prevCloseInput.value = currentPrices['KRX/GLD'].가격;
            }
        }

        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)}%`;

        // [교정] 선임님 기존 클래스명 profit/loss로 정확히 변경
        const cellsToColor = [currentPriceCell, changeCell, changePercentCell];
        cellsToColor.forEach(cell => {
            cell.classList.remove('profit', 'loss'); // 'price-up' 대신 선임님 클래스 사용
            if (prevClose > 0) {
                if (change > 0) cell.classList.add('profit');
                else if (change < 0) cell.classList.add('loss');
            }
        });
        
        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);
    });

    if (usdKrw > 0) {
        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(c => {
                c.classList.remove('profit', 'loss');
                if (btcPrem > 0) c.classList.add('profit'); else if (btcPrem < 0) c.classList.add('loss');
            });
        }

        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(c => {
                c.classList.remove('profit', 'loss');
                if (goldPrem > 0) c.classList.add('profit'); else if (goldPrem < 0) c.classList.add('loss');
            });
        }
    }
}

async function loadAssets() { try { const r = await fetch('/api/assets'); userAssets = await r.json(); renderAssetsTable(); } catch(e) { console.error(e); } }
async function loadAlertSettings() { try { const r = await fetch('/api/alerts/settings'); alertSettings = await r.json(); } catch(e) { console.error(e); } }
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:#f8fafc;">${label}</td><td class="numeric" style="background:#f8fafc;">-</td><td class="numeric premium-value" style="font-weight:bold;background:#f8fafc;">계산중...</td><td class="numeric premium-diff" colspan="2" style="background:#f8fafc;font-weight:bold;">-</td><td colspan="4" style="background:#f8fafc;"></td>`;
    tbody.appendChild(row);
}
function calculatePnLRealtime() {
    let totalBuy = 0, totalCurrentValue = 0;
    let goldBuy = 0, goldCurrent = 0, 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(vId, pId, v, p) {
    const vE = document.getElementById(vId), pE = document.getElementById(pId);
    if (!vE || !pE) return;
    vE.textContent = formatNumber(v, 0) + ' 원'; pE.textContent = formatNumber(p, 2) + '%';
    const sC = v > 0 ? 'profit' : v < 0 ? 'loss' : '';
    vE.className = `pnl-value ${sC}`; pE.className = `pnl-percent ${sC}`;
}
async function handleAssetChange(e) {
    const i = e.target; const s = i.dataset.symbol; const r = i.closest('tr');
    const d = { symbol: s, previous_close: parseFloat(r.querySelector('.prev-close').value)||0, average_price: parseFloat(r.querySelector('.avg-price').value)||0, quantity: parseFloat(r.querySelector('.quantity').value)||0 };
    try { await fetch('/api/assets', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(d) }); calculatePnLRealtime(); } catch(err) { console.error(err); }
}
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 r = await fetch('/api/alerts/settings', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ settings }) }); if (r.ok) { alertSettings = settings; closeAlertModal(); } } catch(err) { console.error(err); }
}
async function refreshData() { await Promise.all([loadAssets(), loadInitialPrices()]); }
function formatNumber(v, d = 0) { if (v === null || v === undefined || isNaN(v)) return 'N/A'; return v.toLocaleString('ko-KR', { minimumFractionDigits: d, maximumFractionDigits: d }); }
window.addEventListener('click', (e) => { if (e.target === document.getElementById('alert-modal')) closeAlertModal(); });