/* Copyright (c) 2025-2026 马建军. All rights reserved.
 * 专有软件 — 未经授权禁止复制、传播、转售。
 * 详见 LICENSE.zh-CN.txt
 */
(function () {
    var cache = null;

    function fmtNum(v, suffix) {
        if (v === null || v === undefined || v === '') return '-';
        var n = Number(v);
        if (isNaN(n)) return String(v);
        var s = Number.isInteger(n) ? String(n) : n.toFixed(2);
        return suffix ? s + suffix : s;
    }

    function fmtMoney(v) {
        if (v === null || v === undefined) return '-';
        return fmtNum(v) + ' 元';
    }

    function fmtPct(v) {
        if (v === null || v === undefined) return '-';
        return fmtNum(v) + '%';
    }

    function setSummary(s) {
        var map = {
            total_trades: function () { return fmtNum(s.total_trades); },
            win_rate: function () { return fmtPct(s.win_rate); },
            avg_profit: function () { return fmtMoney(s.avg_profit); },
            avg_loss: function () { return fmtMoney(s.avg_loss); },
            profit_loss_ratio: function () { return fmtNum(s.profit_loss_ratio); },
            consecutive_losses: function () { return fmtNum(s.consecutive_losses); },
            max_drawdown: function () {
                var amt = fmtMoney(s.max_drawdown);
                var pct = s.max_drawdown_pct ? ' (' + fmtPct(s.max_drawdown_pct) + ')' : '';
                return amt + pct;
            },
            max_loss_amount: function () { return fmtMoney(s.max_loss_amount); },
            max_loss_pct: function () { return fmtPct(s.max_loss_pct); },
            max_profit_amount: function () { return fmtMoney(s.max_profit_amount); },
            max_profit_pct: function () { return fmtPct(s.max_profit_pct); },
            total_fee: function () { return fmtMoney(s.total_fee); },
            emotion_count: function () { return fmtNum(s.emotion_count); },
            emotion_ratio: function () { return fmtPct(s.emotion_ratio); },
        };
        document.querySelectorAll('#stats-summary [data-k]').forEach(function (el) {
            var key = el.getAttribute('data-k');
            el.textContent = map[key] ? map[key]() : '-';
        });
    }

    function fillViewSelect(views, selected) {
        var sel = document.getElementById('stats-view-select');
        if (!sel) return;
        sel.innerHTML = '';
        views.forEach(function (v) {
            var opt = document.createElement('option');
            opt.value = v.key;
            opt.textContent = v.label;
            if (v.key === selected) opt.selected = true;
            sel.appendChild(opt);
        });
    }

    function cellClass(key, val) {
        if (key === 'total_net' || key === 'max_profit' || key === 'avg_profit') {
            if (val > 0) return 'text-profit';
            if (val < 0) return 'text-loss';
        }
        if (key === 'max_loss' || key === 'avg_loss' || key === 'total_fee') {
            return 'text-loss';
        }
        return '';
    }

    function renderBreakdown(key) {
        if (!cache || !cache.breakdowns) return;
        var block = cache.breakdowns[key];
        var head = document.getElementById('stats-breakdown-head');
        var body = document.getElementById('stats-breakdown-body');
        if (!block || !head || !body) return;

        head.innerHTML = '';
        block.columns.forEach(function (col) {
            var th = document.createElement('th');
            th.textContent = col.label;
            head.appendChild(th);
        });

        body.innerHTML = '';
        if (!block.rows || !block.rows.length) {
            var tr = document.createElement('tr');
            var td = document.createElement('td');
            td.colSpan = block.columns.length;
            td.className = 'text-muted';
            td.textContent = '暂无数据';
            tr.appendChild(td);
            body.appendChild(tr);
            return;
        }

        block.rows.forEach(function (row) {
            var tr = document.createElement('tr');
            block.columns.forEach(function (col) {
                var td = document.createElement('td');
                var val = row[col.key];
                if (col.key === 'win_rate') {
                    td.textContent = fmtPct(val);
                } else if (col.key === 'label') {
                    td.textContent = val || '-';
                } else if (typeof val === 'number') {
                    td.textContent = fmtNum(val);
                    td.className = cellClass(col.key, val);
                } else {
                    td.textContent = val != null ? val : '-';
                }
                tr.appendChild(td);
            });
            body.appendChild(tr);
        });
    }

    function applyData(data) {
        cache = data;
        setSummary(data.summary || {});
        var views = data.views || [];
        var sel = document.getElementById('stats-view-select');
        var current = sel && sel.value ? sel.value : (views[0] && views[0].key);
        fillViewSelect(views, current);
        renderBreakdown(current);
        var updated = document.getElementById('stats-updated');
        if (updated) {
            updated.textContent = data.updated_at
                ? '统计更新于 ' + data.updated_at.replace('T', ' ')
                : '统计已加载';
        }
    }

    function loadStats() {
        fetch('/api/stats')
            .then(function (r) { return r.json(); })
            .then(applyData)
            .catch(function () {
                var updated = document.getElementById('stats-updated');
                if (updated) updated.textContent = '加载失败，请刷新页面';
            });
    }

    function bootStatsPage() {
        var viewSel = document.getElementById('stats-view-select');
        if (viewSel && !viewSel.dataset.statsBound) {
            viewSel.dataset.statsBound = '1';
            viewSel.addEventListener('change', function () {
                renderBreakdown(this.value);
            });
        }
        loadStats();
    }

    if (window.qihuoPageBoot) window.qihuoPageBoot(bootStatsPage, '#stats-summary');
    else if (window.qihuoOnPageLoad) window.qihuoOnPageLoad(bootStatsPage);
    else document.addEventListener('DOMContentLoaded', bootStatsPage);
})();