// ==================== 数据加载函数 ====================

async function loadParameters(state) {
    if (state.cachedParams) return state.cachedParams;
    try {
        // 不再传递 group 参数，后端从 SESSION 读取当前组
        const url = '06.01_Parameter_JSON.php';
        const res = await fetch(url);
        if (!res.ok) throw new Error(`HTTP ${res.status}`);
        const data = await res.json();
        if (data.error) throw new Error(data.error);
        state.cachedParams = data;
        return data;
    } catch (err) {
        console.error('加载参数失败:', err);
        throw new Error('参数API请求失败: ' + err.message);
    }
}


async function loadDynamicIndicatorsForAllSymbols(state) {
    if (!state.activeSource || !state.cachedData) {
        return { error: '动态指标：基于已获取的K线数据，请先点击MEXC或Binance按钮获取K线数据' };
    }
    const symbols = Object.keys(state.cachedData);
    const promises = symbols.map(async (sym) => {
        try {
            let url = `06.02_DynamicIndicators_JSON.php?source=${state.activeSource}&symbol=${sym}`;
            // 如果是 Binance，传递当前 group 参数
            if (state.activeSource === 'binance') {
                const group = state.binanceGroup || 1;
                url += `&group=${group}`;
            }
            const res = await fetch(url);
            const data = await res.json();
            return { symbol: sym, data: data };
        } catch (err) {
            console.warn(`加载 ${sym} 动态指标失败`, err);
            return { symbol: sym, data: { error: err.message } };
        }
    });
    const results = await Promise.all(promises);
    const map = {};
    for (const { symbol, data } of results) {
        map[symbol] = data;
    }
    state.cachedRealtimeIndicators = map;
    return map;
}

async function preloadDynamicIndicators(state, dom) {
    if (!state.activeSource || !state.cachedData) return;
    if (state.cachedRealtimeIndicators && Object.keys(state.cachedRealtimeIndicators).length > 0) return;
    console.log('[预加载] 开始静默加载动态指标...');
    await loadDynamicIndicatorsForAllSymbols(state);
    console.log('[预加载] 动态指标加载完成');
    if (state.currentMode === 'realtime') {
        renderRealtimeIndicators(state, dom);
    }
}


async function renderRealtimeIndicators(state, dom) {
    if (!state.activeSource || !state.cachedData) {
        dom.resultDiv.innerHTML = '<div class="no-data">⚠️ 请先点击 MEXC 或 Binance 按钮获取K线数据</div>';
        return;
    }

    // 确保指标字段已加载
    if (!window.indicatorFields) {
        dom.resultDiv.innerHTML = '<div class="no-data">⏳ 正在加载指标字段定义...</div>';
        await loadIndicatorFields();
    }

    if (!state.cachedRealtimeIndicators || Object.keys(state.cachedRealtimeIndicators).length === 0) {
        dom.resultDiv.innerHTML = '<div class="no-data">⏳ 正在加载实时指标，请稍候...</div>';
        await preloadDynamicIndicators(state, dom);
        await renderRealtimeIndicators(state, dom);
        return;
    }

    const dynamicFragment = renderAllDynamicIndicators(state.cachedRealtimeIndicators);
    dom.resultDiv.innerHTML = '';
    dom.resultDiv.appendChild(dynamicFragment);
}


async function showParameterList(state, dom) {
    dom.resultDiv.innerHTML = '<div class="no-data">⏳ 加载参数清单中...</div>';
    try {
        const params = await loadParameters(state);        
        const paramFragment = renderParameterList(params, state);
        const container = document.createElement('div');
        container.id = 'fullParamContainer';
        container.appendChild(paramFragment);
        dom.resultDiv.innerHTML = '';
        dom.resultDiv.appendChild(container);
        if (state.activeSource && state.cachedData) {
            await preloadDynamicIndicators(state, dom);
        }
    } catch (err) {
        console.error('参数清单加载错误:', err);
        dom.resultDiv.innerHTML = `<div class="no-data error-message">❌ 参数清单加载失败<br>${err.message}</div>`;
    }
}

async function loadResultReportData(source, group = 1) {
    try {
        let url = `06.03_ResultReport_JSON.php?source=${source}`;
        if (source === 'binance') {
            url += `&group=${group}`;
        }
        const res = await fetch(url);
        if (!res.ok) throw new Error(`HTTP ${res.status}`);
        const data = await res.json();
        if (data.error) throw new Error(data.error);
        return data;
    } catch (err) {
        console.error('加载报告数据失败:', err);
        throw err;
    }
}