(function () {
    var sizingMode = window.TRADE_SIZING_MODE || 'risk';
    var list = document.getElementById('position-live-list');
    var recommendList = document.getElementById('recommend-list');
    var symInput = document.getElementById('trade-symbol');
    var dirSelect = document.getElementById('trade-direction');
    var lotsInput = document.getElementById('trade-lots');
    var lotsCalc = document.getElementById('trade-lots-calc');
    var priceInput = document.getElementById('trade-price');
    var slInput = document.getElementById('trade-sl');
    var tpInput = document.getElementById('trade-tp');
    var marketHint = document.getElementById('market-hint');
    var metricsHint = document.getElementById('trade-metrics-hint');
    var pollTimer = null;
    var recommendSource = null;
    var quoteTimer = null;
    var lastQuotePrice = null;
    var priceType = 'limit';

    function runWhenReady(fn) {
        if (document.readyState === 'loading') {
            document.addEventListener('DOMContentLoaded', fn);
        } else {
            fn();
        }
    }

    function fmtNum(v, digits) {
        if (v === null || v === undefined) return '--';
        return Number(v).toFixed(digits === undefined ? 2 : digits);
    }

    function selectedSymbol() {
        return (symInput && symInput.value || '').trim();
    }

    function isRiskMode() {
        return sizingMode === 'risk';
    }

    function effectiveLots() {
        if (isRiskMode()) {
            var v = parseInt(lotsCalc && lotsCalc.value, 10);
            return v > 0 ? v : 0;
        }
        return parseInt(lotsInput && lotsInput.value, 10) || 1;
    }

    function entryPrice() {
        if (priceType === 'market') return lastQuotePrice;
        return parseFloat(priceInput && priceInput.value) || 0;
    }

    function setPriceType(type) {
        priceType = type === 'market' ? 'market' : 'limit';
        document.querySelectorAll('.price-tab').forEach(function (btn) {
            btn.classList.toggle('active', btn.getAttribute('data-type') === priceType);
        });
        if (priceInput) {
            priceInput.disabled = priceType === 'market';
            if (priceType === 'market' && lastQuotePrice) priceInput.value = lastQuotePrice;
        }
        if (marketHint) marketHint.hidden = priceType !== 'market';
    }

    function refreshQuote() {
        var sym = selectedSymbol();
        var lots = isRiskMode() ? (effectiveLots() || 1) : (lotsInput ? lotsInput.value : '1');
        if (!sym) return;
        fetch('/api/trade/quote?symbol=' + encodeURIComponent(sym) + '&lots=' + encodeURIComponent(lots))
            .then(function (r) { return r.json(); })
            .then(function (data) {
                if (!data.ok) return;
                lastQuotePrice = data.price;
                if (priceType === 'market' && priceInput && data.price) {
                    priceInput.value = data.price;
                } else if (priceInput && !priceInput.dataset.manual && data.price) {
                    priceInput.value = data.price;
                }
                if (metricsHint && data.metrics) {
                    var m = data.metrics;
                    metricsHint.innerHTML =
                        '<strong>' + (data.name || sym) + '</strong> 精度 ' + m.price_precision +
                        ' 位 · 每跳 <strong class="text-accent">' + m.tick_value_total + '</strong> 元（' + lots + ' 手）';
                }
            }).catch(function () {});
    }

    function scheduleQuote() {
        clearTimeout(quoteTimer);
        quoteTimer = setTimeout(refreshQuote, 400);
    }

    function calcLotsPreview() {
        var sym = selectedSymbol();
        var entry = entryPrice() || parseFloat(priceInput && priceInput.value) || 0;
        var sl = parseFloat(slInput && slInput.value) || 0;
        if (!sym || !entry || !sl) {
            alert('请填写品种、入场价与止损');
            return;
        }
        fetch('/api/trade/preview', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({
                symbol: sym,
                direction: dirSelect ? dirSelect.value : 'long',
                entry: entry,
                price: entry,
                stop_loss: sl,
                take_profit: parseFloat(tpInput && tpInput.value) || 0
            })
        }).then(function (r) { return r.json(); }).then(function (data) {
            if (!data.ok) { alert(data.error || '计算失败'); return; }
            if (lotsCalc) lotsCalc.value = data.lots;
            scheduleQuote();
        });
    }

    function postOrder(offset) {
        var sym = selectedSymbol();
        if (!sym) { alert('请选择品种'); return; }
        var direction = dirSelect ? dirSelect.value : 'long';
        var price = entryPrice();
        if (!price || price <= 0) {
            alert('无法获取有效价格，请先填写或刷新行情');
            return;
        }
        var lots = effectiveLots();
        if (offset === 'open') {
            if (isRiskMode() && lots <= 0) {
                alert('请先点击「计算」得到手数');
                return;
            }
            if (!isRiskMode() && lots <= 0) {
                alert('请填写手数');
                return;
            }
        } else {
            lots = parseInt(lotsInput && lotsInput.value, 10) || 1;
        }
        var body = {
            symbol: sym,
            offset: offset,
            direction: direction,
            lots: lots,
            price: price,
            order_type: priceType,
            stop_loss: slInput && slInput.value ? parseFloat(slInput.value) : null,
            take_profit: tpInput && tpInput.value ? parseFloat(tpInput.value) : null
        };
        fetch('/api/trade/order', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(body)
        }).then(function (r) { return r.json(); }).then(function (data) {
            if (!data.ok) { alert(data.error || '下单失败'); return; }
            alert((offset === 'open' ? '开仓' : '平仓') + '已提交 ' + (data.lots || lots) + ' 手');
            pollPositions();
            refreshQuote();
        });
    }

    function buildPosCard(row) {
        var pnlClass = row.float_pnl > 0 ? 'pnl-pos' : (row.float_pnl < 0 ? 'pnl-neg' : '');
        var pnlText = row.float_pnl != null ? ((row.float_pnl >= 0 ? '+' : '') + fmtNum(row.float_pnl) + ' 元') : '--';
        var dirBadge = row.direction_label || (row.direction === 'long' ? '做多' : '做空');
        var closeBtn = row.can_close ?
            '<button type="button" class="btn-del pos-del" data-close=\'' + JSON.stringify({
                source: row.source, symbol_code: row.symbol_code, direction: row.direction,
                lots: row.lots, mark_price: row.mark_price, monitor_id: row.monitor_id || null
            }) + '\'>平仓</button>' : '';
        return (
            '<div class="pos-card">' +
            '<div class="pos-card-head"><div><div class="title">' + row.symbol + ' <span class="badge dir">' + dirBadge + '</span></div>' +
            '<div class="text-muted" style="font-size:.72rem">' + (row.symbol_code || '') + '</div></div>' + closeBtn + '</div>' +
            '<div class="pos-card-meta">来源 <strong>' + (row.source_label || 'CTP') + '</strong> · 柜台浮盈</div>' +
            '<div class="pos-metrics">' +
            '<div class="cell"><label>持仓均价</label><div>' + fmtNum(row.entry_price) + '</div></div>' +
            '<div class="cell"><label>止损</label><div>' + (row.stop_loss != null ? fmtNum(row.stop_loss) : '--') + '</div></div>' +
            '<div class="cell"><label>止盈</label><div>' + (row.take_profit != null ? fmtNum(row.take_profit) : '--') + '</div></div>' +
            '<div class="cell ' + pnlClass + '"><label>浮盈亏</label><div>' + pnlText + '</div></div>' +
            '</div><div class="pos-footer"><span>' + row.lots + ' 手</span></div></div>'
        );
    }

    function closePosition(payload) {
        function doClose(price) {
            if (!price || price <= 0) { alert('无法获取现价'); return; }
            if (!confirm('确认平仓 ' + payload.lots + ' 手？')) return;
            fetch('/api/trading/close', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify(Object.assign({}, payload, { price: price }))
            }).then(function (r) { return r.json(); }).then(function (d) {
                if (!d.ok) { alert(d.error || '平仓失败'); return; }
                pollPositions();
            });
        }
        if (payload.mark_price > 0) {
            doClose(payload.mark_price);
            return;
        }
        fetch('/api/trade/quote?symbol=' + encodeURIComponent(payload.symbol_code) + '&lots=' + payload.lots)
            .then(function (r) { return r.json(); })
            .then(function (d) { doClose(d.price); });
    }

    function pollPositions() {
        if (!list) return;
        fetch('/api/trading/live')
            .then(function (r) {
                if (!r.ok) throw new Error('HTTP ' + r.status);
                return r.json();
            })
            .then(function (data) {
                var cap = document.getElementById('cap-display');
                if (cap && data.capital != null) cap.textContent = Number(data.capital).toFixed(2);
                var ctpBadge = document.getElementById('ctp-badge');
                if (ctpBadge && data.ctp_status) {
                    ctpBadge.textContent = data.ctp_status.connected ? 'CTP 已连接' : 'CTP 未连接';
                    ctpBadge.className = 'badge ' + (data.ctp_status.connected ? 'profit' : 'planned');
                }
                var rows = data.rows || [];
                if (!data.ctp_status || !data.ctp_status.connected) {
                    list.innerHTML = '<div class="empty-hint">请先连接 CTP，持仓将显示柜台实际数据。</div>';
                    return;
                }
                if (!rows.length) {
                    list.innerHTML = '<div class="empty-hint">柜台暂无持仓。</div>';
                    return;
                }
                list.innerHTML = rows.map(buildPosCard).join('');
                list.querySelectorAll('[data-close]').forEach(function (btn) {
                    btn.addEventListener('click', function () {
                        closePosition(JSON.parse(btn.getAttribute('data-close')));
                    });
                });
            })
            .catch(function () {
                if (list.innerHTML.indexOf('pos-card') < 0) {
                    list.innerHTML = '<div class="empty-hint text-loss">持仓加载失败</div>';
                }
            });
    }

    function renderRecommendations(data) {
        if (!recommendList || !data) return;
        var recCap = document.getElementById('rec-capital');
        if (recCap && data.capital != null) recCap.textContent = Number(data.capital).toFixed(2);
        var rows = data.rows || [];
        if (!rows.length) {
            recommendList.innerHTML = '<tr><td colspan="6" class="empty-hint">当前资金下暂无推荐品种</td></tr>';
            return;
        }
        recommendList.innerHTML = rows.map(function (r) {
            return (
                '<tr class="rec-' + (r.status || '') + '">' +
                '<td><strong>' + (r.name || '') + '</strong> <span class="text-muted">' + (r.ths || '') + '</span></td>' +
                '<td>' + (r.exchange || '') + '</td>' +
                '<td>' + (r.price != null ? r.price : '—') + '</td>' +
                '<td>' + (r.margin_one_lot != null ? r.margin_one_lot : '—') + '</td>' +
                '<td>' + (r.min_capital_one_lot != null ? r.min_capital_one_lot : '—') + '</td>' +
                '<td><span class="badge ' + (r.status === 'ok' ? 'profit' : 'planned') + '">' + (r.status_label || '') + '</span></td>' +
                '</tr>'
            );
        }).join('');
    }

    function connectRecommendStream() {
        if (recommendSource) { recommendSource.close(); recommendSource = null; }
        recommendSource = new EventSource('/api/recommend/stream');
        recommendSource.addEventListener('recommend', function (ev) {
            try { renderRecommendations(JSON.parse(ev.data)); } catch (e) { /* ignore */ }
        });
        recommendSource.onerror = function () {
            if (recommendSource) { recommendSource.close(); recommendSource = null; }
            setTimeout(connectRecommendStream, 5000);
        };
    }

    document.querySelectorAll('.price-tab').forEach(function (btn) {
        btn.addEventListener('click', function () {
            setPriceType(btn.getAttribute('data-type'));
            scheduleQuote();
        });
    });

    if (symInput) symInput.addEventListener('input', scheduleQuote);
    if (lotsInput) lotsInput.addEventListener('input', scheduleQuote);
    if (slInput) slInput.addEventListener('input', function () {
        if (isRiskMode() && lotsCalc) lotsCalc.value = '';
    });
    if (priceInput) {
        priceInput.addEventListener('input', function () {
            if (priceType === 'limit') priceInput.dataset.manual = '1';
        });
    }

    var btnCalc = document.getElementById('btn-calc-lots');
    if (btnCalc) btnCalc.addEventListener('click', calcLotsPreview);

    var btnOpen = document.getElementById('btn-open');
    var btnClose = document.getElementById('btn-close-pos');
    if (btnOpen) btnOpen.addEventListener('click', function () { postOrder('open'); });
    if (btnClose) btnClose.addEventListener('click', function () { postOrder('close'); });

    var btnConnect = document.getElementById('btn-ctp-connect');
    if (btnConnect) {
        btnConnect.addEventListener('click', function () {
            btnConnect.disabled = true;
            btnConnect.textContent = '连接中…';
            fetch('/api/ctp/connect', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: '{}' })
                .then(function (r) { return r.json(); })
                .then(function (d) {
                    if (!d.ok) { alert(d.error || '连接失败'); return; }
                    location.reload();
                })
                .finally(function () {
                    btnConnect.disabled = false;
                    btnConnect.textContent = '连接 CTP';
                });
        });
    }

    runWhenReady(function () {
        setPriceType('limit');
        pollPositions();
        connectRecommendStream();
        pollTimer = setInterval(pollPositions, 3000);
        scheduleQuote();
    });
})();