/* 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 trendPayload = null;

    function jsonPost(url, body) {
        return fetch(url, {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(body || {})
        }).then(function (r) { return r.json(); });
    }

    function formData(form) {
        var fd = new FormData(form);
        var o = {};
        fd.forEach(function (v, k) { o[k] = v; });
        return o;
    }

    function esc(s) {
        return String(s == null ? '' : s)
            .replace(/&/g, '&')
            .replace(/</g, '&lt;')
            .replace(/>/g, '&gt;');
    }

    function showPreview(el, content, ok, isHtml) {
        if (!el) return;
        if (!content) {
            el.hidden = true;
            el.textContent = '';
            el.innerHTML = '';
            return;
        }
        el.hidden = false;
        el.style.color = ok === false ? 'var(--loss)' : '';
        if (isHtml) {
            el.innerHTML = content;
        } else {
            el.innerHTML = '';
            el.textContent = content;
        }
    }

    function fmtNum(v) {
        if (v == null || v === '') return '—';
        return String(v);
    }

    function renderTrendPlanHtml(plan) {
        if (!plan) return '';
        var summary = plan.summary_line || (
            (plan.symbol_name || plan.symbol || '') + ' ' +
            (plan.direction_label || '') + ' ' + (plan.period_label || '')
        );
        var detail = plan.detail_line || '';
        var rows = plan.preview_rows || [];
        var html = '<div class="trend-summary">' + esc(summary) + '</div>';
        if (detail) {
            html += '<div class="trend-detail">' + esc(detail) + '</div>';
        }
        if (rows.length) {
            html += '<table class="strategy-preview-table"><thead><tr>' +
                '<th>档位</th><th>触发/参考价</th><th>手数</th><th>加仓后均价</th>' +
                '<th>止盈盈利(元)</th><th>止损(元)</th><th>盈亏比</th>' +
                '</tr></thead><tbody>';
            rows.forEach(function (row) {
                html += '<tr><td>' + esc(row.level) + '</td>' +
                    '<td>' + fmtNum(row.price) + '</td>' +
                    '<td>' + fmtNum(row.lots) + '</td>' +
                    '<td>' + fmtNum(row.avg_after) + '</td>' +
                    '<td>' + fmtNum(row.profit_at_tp) + '</td>' +
                    '<td>' + fmtNum(row.loss_at_sl) + '</td>' +
                    '<td>' + fmtNum(row.rr_ratio) + '</td></tr>';
            });
            html += '</tbody></table>';
        } else {
            html += '<div class="trend-detail">目标手数 ' + fmtNum(plan.target_lots) +
                ' · 首仓 ' + fmtNum(plan.first_lots) + ' 手</div>';
        }
        return html;
    }

    function formatRoll(preview) {
        if (!preview) return '';
        var lines = [];
        if (preview.add_lots != null) lines.push('加仓手数：' + preview.add_lots);
        if (preview.new_stop_loss != null) lines.push('新止损：' + preview.new_stop_loss);
        if (preview.total_lots != null) lines.push('合计手数：' + preview.total_lots);
        if (preview.worst_loss != null) lines.push('最坏亏损：' + preview.worst_loss + ' 元');
        if (preview.margin_usage_pct != null) {
            lines.push('滚仓后保证金占用：' + preview.margin_usage_pct + '%');
        }
        if (preview.margin_cap_note) lines.push(preview.margin_cap_note);
        if (preview.message) lines.push(preview.message);
        return lines.length ? lines.join('\n') : JSON.stringify(preview, null, 2);
    }

    var trendForm = document.getElementById('trend-form');
    var btnPreview = document.getElementById('btn-trend-preview');
    var btnExec = document.getElementById('btn-trend-exec');
    var previewEl = document.getElementById('trend-preview');

    if (btnPreview && trendForm) {
        btnPreview.addEventListener('click', function () {
            btnPreview.disabled = true;
            jsonPost('/api/strategy/trend/preview', formData(trendForm)).then(function (d) {
                if (!d.ok) {
                    showPreview(previewEl, d.error || '预览失败', false, false);
                    btnExec.hidden = true;
                    return;
                }
                trendPayload = formData(trendForm);
                showPreview(previewEl, renderTrendPlanHtml(d.plan), true, true);
                btnExec.hidden = false;
            }).finally(function () {
                btnPreview.disabled = false;
            });
        });
    }
    if (btnExec) {
        btnExec.addEventListener('click', function () {
            if (!trendPayload) return;
            btnExec.disabled = true;
            btnExec.textContent = '执行中…';
            jsonPost('/api/strategy/trend/execute', trendPayload).then(function (d) {
                if (!d.ok) { alert(d.error); return; }
                location.reload();
            }).finally(function () {
                btnExec.disabled = false;
                btnExec.textContent = '确认执行首仓';
            });
        });
    }

    var rollForm = document.getElementById('roll-form');
    var btnRollP = document.getElementById('btn-roll-preview');
    var btnRollE = document.getElementById('btn-roll-exec');
    var rollPrev = document.getElementById('roll-preview');
    if (btnRollP && rollForm) {
        btnRollP.addEventListener('click', function () {
            btnRollP.disabled = true;
            jsonPost('/api/strategy/roll/preview', formData(rollForm)).then(function (d) {
                if (!d.ok) {
                    showPreview(rollPrev, d.error, false, false);
                    btnRollE.hidden = true;
                    return;
                }
                showPreview(rollPrev, formatRoll(d.preview), true, false);
                btnRollE.hidden = false;
            }).finally(function () {
                btnRollP.disabled = false;
            });
        });
    }
    if (btnRollE && rollForm) {
        btnRollE.addEventListener('click', function () {
            btnRollE.disabled = true;
            btnRollE.textContent = '执行中…';
            jsonPost('/api/strategy/roll/execute', formData(rollForm)).then(function (d) {
                if (!d.ok) { alert(d.error); return; }
                location.reload();
            }).finally(function () {
                btnRollE.disabled = false;
                btnRollE.textContent = '执行滚仓';
            });
        });
    }

    var btnStop = document.getElementById('btn-trend-stop');
    if (btnStop) {
        btnStop.addEventListener('click', function () {
            var pid = document.querySelector('#trend-stop-form input[name=plan_id]');
            jsonPost('/api/strategy/trend/stop', { plan_id: pid ? pid.value : 0 }).then(function (d) {
                if (!d.ok) { alert(d.error); return; }
                location.reload();
            });
        });
    }
})();