const state = {
  tasks: [], version: 1, selectedId: null, selectedTask: null,
  daily: null, history: null, summary: null, csrf: "", authEnabled: false,
  filter: "", editingId: null, dragId: null, selectedDate: null, ganttScale: "month",
};

const $ = (selector, root = document) => root.querySelector(selector);
const $$ = (selector, root = document) => [...root.querySelectorAll(selector)];
const today = () => new Intl.DateTimeFormat("en-CA", { timeZone: "Asia/Shanghai" }).format(new Date());
const shanghaiDate = (offsetDays) => {
  const now = new Date(Date.now() + offsetDays * 86400000);
  return new Intl.DateTimeFormat("en-CA", { timeZone: "Asia/Shanghai" }).format(now);
};
const escapeHtml = (value) => String(value ?? "").replace(/[&<>"']/g, (char) => ({"&":"&amp;","<":"&lt;",">":"&gt;",'"':"&quot;","'":"&#039;"}[char]));
const metricKindLabel = { checkin: "打卡", quantity: "数量", duration: "时长" };
const periodLabel = { day: "每日", week: "每周", month: "每月", lifetime: "总计" };
const durationUnitLabel = { second: "秒", minute: "分", hour: "时" };
const DURATION_SECONDS = { second: 1, minute: 60, hour: 3600 };

async function api(path, options = {}) {
  const opts = { ...options, headers: { ...(options.body ? { "Content-Type": "application/json" } : {}), ...(options.headers || {}) } };
  if (!opts.method || !["GET", "HEAD"].includes(opts.method)) opts.headers["X-CSRF-Token"] = state.csrf;
  const response = await fetch(path, opts);
  let body = null;
  try { body = await response.json(); } catch { body = {}; }
  if (response.status === 401 && state.authEnabled) { showLogin(); throw new Error(body.detail || "需要登录"); }
  if (!response.ok) throw new Error(body.detail || `请求失败 (${response.status})`);
  return body;
}

function toast(message) {
  const node = $("#toast"); node.textContent = message; node.classList.add("show");
  window.clearTimeout(toast.timer); toast.timer = window.setTimeout(() => node.classList.remove("show"), 2600);
}

function showLogin() { $("#loginOverlay").hidden = false; $("#app").setAttribute("aria-busy", "true"); }
function hideLogin() { $("#loginOverlay").hidden = true; $("#app").setAttribute("aria-busy", "false"); }

async function bootstrap() {
  const dateNode = $("#logicalDate"); if (dateNode) dateNode.textContent = today();
  try {
    const auth = await api("/api/auth/status");
    state.authEnabled = auth.enabled; state.csrf = auth.csrfToken || "";
    if (auth.enabled && !auth.authenticated) { showLogin(); return; }
    hideLogin();
    await loadTasks();
  } catch (error) { toast(error.message); }
}

const layoutCache = { home: null, "task-detail": null };
async function ensureLayout(page) { if (!layoutCache[page]) layoutCache[page] = await api(`/api/layouts/${page}`); return layoutCache[page]; }
async function loadTasks() {
  const result = await api("/api/tasks"); state.tasks = result.items; state.version = result.version;
  if (!state.selectedId || !state.tasks.some((task) => task.taskId === state.selectedId)) state.selectedId = state.tasks[0]?.taskId || null;
  await render();
}

function renderTaskList() {
  const filtered = state.tasks.filter((task) => !state.filter || task.name.toLowerCase().includes(state.filter.toLowerCase()));
  const items = filtered.map((task) => `<div class="task-item ${task.taskId === state.selectedId ? "selected" : ""}" draggable="true" data-task-id="${task.taskId}">
    <span class="priority-bar priority-${task.priority}"></span><span class="task-copy"><strong>${escapeHtml(task.name)}</strong><small>${periodText(task)} · ${task.metrics.length} 个指标</small></span><span class="drag-handle" title="拖动排序" aria-hidden="true">⠿</span></div>`).join("");
  return `<div class="sidebar-heading"><div><p class="eyebrow">WORKSPACE</p><h2>我的任务</h2></div><span>${state.tasks.length} 项</span></div><div class="filter-row"><input id="taskFilter" placeholder="搜索任务" value="${escapeHtml(state.filter)}"><button class="icon-button" id="clearFilter" title="清除搜索" aria-label="清除搜索">×</button></div><div class="task-list">${items || `<div class="empty-list">还没有任务<br>从右上角新建一项计划</div>`}</div>`;
}

function bindSidebar() {
  const filterInput = $("#taskFilter");
  if (filterInput) {
    filterInput.addEventListener("input", (event) => { state.filter = event.target.value; rerenderSidebarList(); });
    $("#clearFilter")?.addEventListener("click", () => { state.filter = ""; rerenderSidebarList(); });
  }
  bindSidebarItems();
}

function rerenderSidebarList() {
  $("#sidebar").innerHTML = renderTaskList();
  bindSidebar();
}

function bindSidebarItems() {
  $$(".task-item").forEach((node) => {
    node.addEventListener("click", () => { state.selectedId = node.dataset.taskId; render(); });
    node.addEventListener("dragstart", () => { state.dragId = node.dataset.taskId; node.classList.add("dragging"); });
    node.addEventListener("dragend", () => { node.classList.remove("dragging"); state.dragId = null; });
    node.addEventListener("dragover", (event) => event.preventDefault());
    node.addEventListener("drop", async (event) => { event.preventDefault(); if (!state.dragId || state.dragId === node.dataset.taskId) return; await reorder(state.dragId, node.dataset.taskId); });
  });
}

async function reorder(fromId, toId) {
  const ids = state.tasks.map((task) => task.taskId); const from = ids.indexOf(fromId); const to = ids.indexOf(toId);
  ids.splice(from, 1); ids.splice(to, 0, fromId);
  try { await api("/api/tasks/reorder/all", { method: "PUT", body: JSON.stringify({ taskIds: ids, expectedVersion: state.version }) }); toast("排序已保存"); await loadTasks(); }
  catch (error) { toast(error.message); }
}

function periodText(task) { const metrics = task.metrics || []; return [...new Set(metrics.map((metric) => periodLabel[metric.period] || metric.period))].join(" / "); }
function summaryFor(taskId) { return state.summary?.tasks?.[taskId] || null; }
function metricSummary(taskId, metricId) { return summaryFor(taskId)?.metrics?.find((metric) => metric.metricId === metricId) || null; }

// ---- 组件注册表：布局白名单对应的渲染器与事件绑定 ----
// 页面/区域约束与单例约束由服务端 validate_layout 保证（非法布局回退到内置默认），
// 前端只负责渲染已校验的布局，不再二次过滤以免静默丢组件。
const components = {
  "task-list": { render: renderTaskList, bind: bindSidebar },
  "overview-summary": { render: renderOverviewSummary },
  "task-progress-grid": { render: renderTaskProgressGrid, bind: bindOverview },
  "task-gantt": { render: renderTaskGantt, bind: bindGantt },
  "task-header": { render: renderTaskHeader, bind: bindTaskHeader },
  "today-record": { render: renderTodayRecord, bind: bindRecordForm },
  "metric-progress": { render: renderMetricProgress },
  "activity-heatmap": { render: renderActivityHeatmap },
  "task-settings": { render: renderTaskSettings, bind: bindSettings },
};

function componentHtml(item) { const entry = components[item.component]; return entry ? entry.render(item.options || {}) : ""; }

function bindComponents(items) {
  for (const item of items) {
    const entry = components[item.component];
    if (entry?.bind) entry.bind(item.options || {});
  }
}

async function renderLayout(page) {
  const layout = await ensureLayout(page);
  const sidebarItems = layout.regions.sidebar || [];
  const mainItems = layout.regions.main || [];
  $("#sidebar").innerHTML = sidebarItems.map(componentHtml).join("");
  $("#main").innerHTML = mainItems.map(componentHtml).join("");
  bindComponents(sidebarItems);
  bindComponents(mainItems);
}

async function render() {
  if (!state.selectedId) {
    try { state.summary = await api("/api/summary"); } catch (error) { toast(error.message); }
    await renderLayout("home");
    return;
  }
  state.selectedTask = state.tasks.find((task) => task.taskId === state.selectedId);
  const layout = await ensureLayout("task-detail");
  const heatmap = (layout.regions.main || []).find((item) => item.component === "activity-heatmap");
  const historyDays = Math.min(heatmap?.options?.historyDays ?? 365, 730);
  const start = shanghaiDate(-(historyDays - 1));
  const recordDate = state.selectedDate || today();
  try {
    [state.summary, state.daily, state.history] = await Promise.all([
      api("/api/summary"),
      api(`/api/tasks/${state.selectedId}/daily/${recordDate}`),
      api(`/api/tasks/${state.selectedId}/history?start=${start}&end=${today()}`),
    ]);
  } catch (error) { toast(error.message); return; }
  await renderLayout("task-detail");
}

function renderOverviewSummary() {
  const active = state.tasks.filter((task) => !task.deletedAt); const activePlans = active.filter((task) => task.state === "active").length;
  return `<div class="page-heading"><div><p class="eyebrow">OVERVIEW · ${today()}</p><h1>把注意力放回正在发生的事</h1><p>所有计划、记录和节奏，都在这里保持可见。</p></div></div><div class="summary-strip"><div class="summary-cell"><strong>${active.length}</strong><span>进行中的任务</span></div><div class="summary-cell"><strong>${activePlans}</strong><span>活跃计划</span></div><div class="summary-cell"><strong>${active.filter((task) => task.priority <= 2).length}</strong><span>高优先级</span></div></div>`;
}

function renderTaskProgressGrid() {
  const active = state.tasks.filter((task) => !task.deletedAt);
  const rows = active.map((task) => {
    const summary = summaryFor(task.taskId);
    const metrics = (task.metrics || []).map((metric) => {
      const info = (summary?.metrics || []).find((item) => item.metricId === metric.metricId) || { value: 0, percent: null };
      const pct = info.percent ?? 0;
      const valueText = metricDisplayValue(metric, info.value ?? 0);
      const targetText = metric.target ? ` / ${metricDisplayTarget(metric)}` : "";
      return `<div class="mini-progress"><span class="mini-progress-label" title="${escapeHtml(metric.name)}">${escapeHtml(metric.name)}<small>${valueText}${targetText}${metric.target ? ` · ${pct}%` : ""}</small></span><div class="progress-track"><div class="progress-fill" style="width:${pct}%"></div></div></div>`;
    }).join("");
    return `<div class="overview-row" data-task-id="${task.taskId}"><div class="overview-name"><strong>${escapeHtml(task.name)}</strong><small>${periodText(task)} · ${task.metrics.length} 个指标</small></div><div class="overview-metrics">${metrics}</div><span class="status-badge ${task.state === "paused" ? "paused" : ""}">${task.state === "paused" ? "已挂起" : ""}</span></div>`;
  }).join("");
  return `<section class="section"><div class="section-heading"><h2>任务进度</h2><span>每个指标独立展示</span></div><div class="overview-list">${rows || `<div class="empty-list">还没有计划，从右上角开始添加。</div>`}</div></section>`;
}

function bindOverview() {
  $$(".overview-row").forEach((row) => row.addEventListener("click", () => { state.selectedId = row.dataset.taskId; render(); }));
}

// ---- 主页任务时间甘特图 ----
// 日期统一用 UTC epoch-day 整数。「按周/按月」是缩放级别：一周和一月的
// 视觉宽度一致（约一个屏幕宽），时间轴覆盖全部任务，超出用底部横向滚动条。
function _epochDay(isoDate) {
  if (!isoDate) return null;
  return Math.floor(Date.parse(`${isoDate}T00:00:00Z`) / 86400000);
}

function _ganttFiniteBounds(tasks) {
  let min = Infinity, max = -Infinity, any = false;
  for (const task of tasks) {
    const s = _epochDay(task.startDate);
    const e = _epochDay(task.endDate);
    if (s !== null) { min = Math.min(min, s); max = Math.max(max, s); any = true; }
    if (e !== null) { min = Math.min(min, e); max = Math.max(max, e); any = true; }
  }
  return any ? { min, max } : { min: null, max: null };
}

// 月份带：每个跨月的月一个带，标签 "2026-08"。
function _ganttMonthBands(min, max) {
  const bands = [];
  let cursor = min;
  while (cursor <= max) {
    const d = new Date(cursor * 86400000);
    const y = d.getUTCFullYear(), m = d.getUTCMonth();
    const monthStart = _epochDay(`${y}-${String(m + 1).padStart(2, "0")}-01`);
    const nextMonth = Math.floor(new Date(Date.UTC(y, m + 1, 1)).getTime() / 86400000);
    const start = Math.max(monthStart, min);
    const end = Math.min(nextMonth - 1, max);
    bands.push({ start, span: end - start + 1, label: `${y}-${String(m + 1).padStart(2, "0")}` });
    cursor = nextMonth;
  }
  return bands;
}

// 天刻度：周视图每天标、月视图每 5 天标一次避免拥挤。
function _ganttDayMarks(min, max, scale) {
  const step = scale === "week" ? 1 : 5;
  const marks = [];
  for (let d = min; d <= max; d++) {
    if ((d - min) % step !== 0) continue;
    const dt = new Date(d * 86400000);
    marks.push({ start: d, label: `${dt.getUTCMonth() + 1}/${dt.getUTCDate()}` });
  }
  return marks;
}

function renderTaskGantt(options) {
  const scale = options.scale || state.ganttScale || "month";
  const active = state.tasks.filter((task) => !task.deletedAt);
  if (!active.length) return `<section class="section"><div class="section-heading"><h2>时间线</h2><span>起止概览</span></div><div class="empty-list">还没有任务，从右上角新建</div></section>`;

  const finite = _ganttFiniteBounds(active);
  const todayEpoch = _epochDay(today());
  let min, max;
  if (finite.min === null) { min = todayEpoch - 15; max = todayEpoch + 15; }
  else { min = finite.min; max = finite.max; }
  if (todayEpoch < min) min = todayEpoch;
  if (todayEpoch > max) max = todayEpoch;
  min -= 2; max += 2; // 两端留余量，容纳「无限」任务的箭头
  const days = max - min + 1;
  const col = (epoch) => (epoch - min) + 2; // 第 1 列是任务名列

  const header = `<div class="gantt-scale-switch"><button class="gantt-scale-btn ${scale === "week" ? "active" : ""}" data-gantt-scale="week">按周</button><button class="gantt-scale-btn ${scale === "month" ? "active" : ""}" data-gantt-scale="month">按月</button></div>`;

  const monthBands = _ganttMonthBands(min, max).map((b) =>
    `<div class="gantt-month-band" style="--col:${col(b.start)}; --span:${b.span}">${b.label}</div>`
  ).join("");
  const dayMarks = _ganttDayMarks(min, max, scale).map((m) =>
    `<div class="gantt-day-mark" style="--col:${col(m.start)}">${m.label}</div>`
  ).join("");

  const rows = active.map((task, i) => {
    const row = i + 3; // 第 1 行月份带、第 2 行天刻度
    const s = _epochDay(task.startDate);
    const e = _epochDay(task.endDate);
    const openLeft = s === null || s < min;
    const openRight = e === null || e > max;
    const startCol = openLeft ? 2 : col(s);
    const endCol = openRight ? days + 2 : col(e) + 1; // grid-column 结束线为开区间
    return `<div class="gantt-label" data-task-id="${task.taskId}" style="--row:${row}" title="${escapeHtml(task.name)}">${escapeHtml(task.name)}</div><div class="gantt-bar priority-${task.priority} ${openLeft ? "open-left" : ""} ${openRight ? "open-right" : ""}" data-task-id="${task.taskId}" style="--row:${row}; --start:${startCol}; --end:${endCol}"></div>`;
  }).join("");

  const todayMark = (todayEpoch >= min && todayEpoch <= max)
    ? `<div class="gantt-today" style="--col:${col(todayEpoch)}"></div>`
    : "";

  return `<section class="section"><div class="section-heading"><h2>时间线</h2><span>起止概览 · 无日期视为无限</span>${header}</div><div class="gantt-viewport" data-scale="${scale}"><div class="gantt-layout" style="--days:${days}; --rows:${active.length}">${monthBands}${dayMarks}${rows}${todayMark}</div></div></section>`;
}

function bindGantt() {
  $$(".gantt-label, .gantt-bar").forEach((node) => node.addEventListener("click", () => { state.selectedId = node.dataset.taskId; render(); }));
  $$(".gantt-scale-btn").forEach((btn) => btn.addEventListener("click", () => { state.ganttScale = btn.dataset.ganttScale; renderLayout("home"); }));
}

function renderTaskHeader() {
  const task = state.selectedTask;
  return `<div class="page-heading"><div><p class="eyebrow">TASK DETAIL · 优先级 ${task.priority}</p><h1>${escapeHtml(task.name)}</h1><p>${escapeHtml(task.description || "还没有写下说明")}</p></div><div class="top-actions"><span class="status-badge ${task.state === "paused" ? "paused" : ""}">${task.state === "paused" ? "已挂起" : "进行中"}</span><button class="button" id="editTaskButton">编辑属性</button></div></div>`;
}

function bindTaskHeader() {
  $("#editTaskButton").addEventListener("click", () => openTaskDialog(state.selectedTask));
}

// 按指标配置的时长单位把「整数秒」格式化为人类可读口径。
function formatDuration(seconds, unit) {
  const total = Math.max(0, Math.floor(Number(seconds) || 0));
  const label = durationUnitLabel[unit] || "分";
  const factor = DURATION_SECONDS[unit] || 60;
  const value = total / factor;
  if (factor === 3600 && value % 1 !== 0 && value < 10) return `${value.toFixed(1)} 时`;
  return `${Number.isInteger(value) ? value : value.toFixed(1)} ${label}`;
}

function metricField(metric) {
  const value = state.daily?.values?.[metric.metricId] || 0;
  if (metric.kind === "checkin") return `<label class="record-field check"><input type="checkbox" data-metric-id="${metric.metricId}" value="1" ${value ? "checked" : ""}><span><strong>${escapeHtml(metric.name)}</strong><small class="muted">${periodLabel[metric.period]}</small></span></label>`;
  if (metric.kind === "duration") {
    const unit = metric.durationUnit || "minute";
    const unitLabel = durationUnitLabel[unit] || "分";
    const scaled = value / (DURATION_SECONDS[unit] || 60);
    return `<label class="record-field"><span><strong>${escapeHtml(metric.name)}</strong><small class="muted">时长 · ${unitLabel} · ${periodLabel[metric.period]}</small></span><input type="number" min="0" step="any" data-kind="duration" data-duration-unit="${unit}" data-metric-id="${metric.metricId}" value="${scaled}"></label>`;
  }
  return `<label class="record-field"><span><strong>${escapeHtml(metric.name)}</strong><small class="muted">${metricKindLabel[metric.kind]} · ${metric.unit || "次"} · ${periodLabel[metric.period]}</small></span><input type="number" min="0" step="1" data-metric-id="${metric.metricId}" value="${value}"></label>`;
}

function renderTodayRecord() {
  const task = state.selectedTask;
  const recordDate = state.selectedDate || today();
  const isToday = recordDate === today();
  const completedToday = Object.values(state.daily?.values || {}).some((value) => value > 0);
  const hasCheckin = task.metrics.some((metric) => metric.kind === "checkin");
  const fields = task.metrics.map(metricField).join("");
  return `<section class="section" id="todayRecord"><div class="section-heading"><div><h2>${isToday ? "今天" : "补录"}，${recordDate}</h2><span>${isToday ? "只记录今天真实完成的部分" : "补充过去某天的记录，历史事实不会被删除"}</span></div><span class="status-badge ${completedToday ? "" : "paused"}">${completedToday ? "已有记录" : "尚未记录"}</span></div><div class="record-date-row"><input id="recordDate" type="date" value="${recordDate}" max="${today()}"></div><div class="record-grid">${fields}<label class="record-field wide">心得<textarea id="dailyNote" rows="4" maxlength="4000" placeholder="记下今天的阻力、收获或下一步">${escapeHtml(state.daily?.note || "")}</textarea></label><label class="record-field">完成时间<input id="completedAt" type="datetime-local" value="${toLocalDatetime(state.daily?.completedAt)}"></label></div><div class="record-actions">${hasCheckin ? `<button class="button primary" id="quickCheckinButton" type="button">一键打卡</button>` : `<span class="muted">修改会保留任务历史版本</span>`}<button class="button primary" id="saveDailyButton">保存${isToday ? "今日" : "补录"}记录</button></div></section>`;
}

function collectTodayValues() {
  return $$(`#todayRecord [data-metric-id]`).map((node) => {
    let value;
    if (node.type === "checkbox") value = node.checked ? 1 : 0;
    else if (node.dataset.kind === "duration") value = Math.round(Math.max(0, Number(node.value || 0)) * (DURATION_SECONDS[node.dataset.durationUnit] || 60));
    else value = Math.max(0, Number(node.value || 0));
    return { metricId: node.dataset.metricId, value };
  });
}

function saveTodayRecord(values = collectTodayValues()) {
  const task = state.selectedTask;
  const recordDate = state.selectedDate || today();
  const completedAt = $("#todayRecord #completedAt")?.value || "";
  return api(`/api/tasks/${task.taskId}/daily/${recordDate}`, { method: "PUT", body: JSON.stringify({ expectedVersion: state.daily?.version || 0, note: $("#todayRecord #dailyNote")?.value || "", completedAt: completedAt ? `${completedAt}:00` : null, values }) });
}

function toLocalDatetime(value) { return value ? value.slice(0, 16) : ""; }
function bindRecordForm() {
  $("#recordDate")?.addEventListener("change", (event) => { state.selectedDate = event.target.value || null; render(); });
  $("#saveDailyButton").addEventListener("click", async () => {
    try { await saveTodayRecord(); toast(state.selectedDate ? "补录已保存" : "今日记录已保存"); await render(); } catch (error) { toast(error.message); }
  });
  $("#quickCheckinButton")?.addEventListener("click", async () => {
    $$(`#todayRecord [data-metric-id][type="checkbox"]`).forEach((node) => { node.checked = true; });
    try { await saveTodayRecord(); toast("已打卡"); await render(); } catch (error) { toast(error.message); }
  });
}

function metricDisplayValue(metric, value) {
  if (metric.kind === "duration") return formatDuration(value, metric.durationUnit || "minute");
  return `${value}${metric.unit ? ` ${metric.unit}` : ""}`;
}

function metricDisplayTarget(metric) {
  if (metric.kind === "duration") return formatDuration(metric.target, metric.durationUnit || "minute");
  return metric.target;
}

function renderMetricProgress() {
  const task = state.selectedTask;
  const cards = task.metrics.map((metric) => {
    const info = metricSummary(task.taskId, metric.metricId) || { value: 0, target: metric.target, percent: null, windowStart: "", windowEnd: "" };
    const scope = metric.period === "lifetime" ? `自 ${info.windowStart}` : `${info.windowStart} ~ ${info.windowEnd}`;
    const valueText = metricDisplayValue(metric, info.value);
    const targetText = info.target ? ` <small>/ ${metricDisplayTarget(metric)}</small>` : "";
    return `<div class="metric-card"><div class="metric-card-head"><strong>${escapeHtml(metric.name)}</strong><small>${metricKindLabel[metric.kind]}</small></div><div class="metric-value">${valueText}${targetText}</div><div class="progress-track"><div class="progress-fill" style="width:${info.percent ?? 0}%"></div></div><small class="muted">${periodLabel[metric.period]} · ${info.percent === null ? "无上限" : `${info.percent}%`} · ${scope}</small></div>`;
  }).join("");
  return `<section class="section"><div class="section-heading"><h2>指标总览</h2><span>基于每日事实计算</span></div><div class="metric-cards">${cards}</div></section>`;
}

function renderActivityHeatmap(options) {
  const days = Math.min(options.historyDays ?? 365, 730);
  const heat = Array.from({ length: days }, (_, index) => { const iso = shanghaiDate(index - (days - 1)); const record = state.history?.records?.find((item) => item.date === iso); const amount = record ? Object.values(record.values || {}).reduce((sum, value) => sum + Number(value), 0) : 0; return `<span class="heat-cell level-${amount ? Math.min(4, Math.ceil(amount / 2)) : 0}" title="${iso} · ${amount}"></span>`; }).join("");
  return `<section class="section"><div class="section-heading"><h2>活动热力图</h2><span>过去 ${Math.round(days / 30)} 个月</span></div><div class="heatmap-wrap"><div class="heatmap">${heat}</div></div><div class="heat-legend"><span>少</span><i></i><i class="heat-cell level-1"></i><i class="heat-cell level-2"></i><i class="heat-cell level-3"></i><i class="heat-cell level-4"></i><span>多</span></div></section>`;
}

function renderTaskSettings() { return `<section class="section"><div class="section-heading"><div><h2>危险操作</h2><span>默认保留历史，可从后台彻底清理</span></div></div><button class="button danger" id="deleteTaskButton">移入回收站</button></section>`; }
function bindSettings() { const task = state.selectedTask; $("#deleteTaskButton").addEventListener("click", async () => { if (!confirm(`确认将“${task.name}”移入回收站？`)) return; try { await api(`/api/tasks/${task.taskId}?expectedVersion=${task.version}`, { method: "DELETE" }); state.selectedId = null; toast("任务已移入回收站"); await loadTasks(); } catch (error) { toast(error.message); } }); }

function openTaskDialog(task = null) {
  state.editingId = task?.taskId || null; const form = $("#taskForm"); form.reset(); $("#taskDialogTitle").textContent = task ? "编辑任务属性" : "新建任务";
  form.startDate.value = task?.startDate || ""; form.endDate.value = task?.endDate || ""; form.name.value = task?.name || ""; form.description.value = task?.description || ""; form.priority.value = task?.priority || 3; form.state.value = task?.state || "active";
  renderMetricEditor(task?.metrics || [{ name: "完成", kind: "checkin", period: "day", target: 1, unit: "次" }]); $("#taskDialog").showModal();
}
function metricTargetToEditor(metric) {
  if (metric.target == null) return "";
  if (metric.kind === "duration") return metric.target / (DURATION_SECONDS[metric.durationUnit] || 60);
  return metric.target;
}

function renderMetricEditor(metrics) {
  $("#metricEditor").innerHTML = metrics.map((metric, index) => {
    const isDuration = metric.kind === "duration";
    const du = metric.durationUnit || "minute";
    const unitField = `<label data-role="unit" ${isDuration ? "hidden" : ""}>单位<input data-field="unit" maxlength="20" value="${escapeHtml(metric.unit || "")}" placeholder="次"></label>`;
    const durationUnitField = `<label data-role="durationUnit" ${isDuration ? "" : "hidden"}>时长单位<select data-field="durationUnit" data-prev-unit="${du}"><option value="second" ${du === "second" ? "selected" : ""}>秒</option><option value="minute" ${du === "minute" ? "selected" : ""}>分</option><option value="hour" ${du === "hour" ? "selected" : ""}>时</option></select></label>`;
    const targetValue = metricTargetToEditor(metric);
    return `<div class="metric-row" data-index="${index}" data-metric-id="${escapeHtml(metric.metricId || "")}"><label>名称<input data-field="name" value="${escapeHtml(metric.name)}" maxlength="60" required></label><label>类型<select data-field="kind"><option value="checkin" ${metric.kind === "checkin" ? "selected" : ""}>打卡</option><option value="quantity" ${metric.kind === "quantity" ? "selected" : ""}>数量</option><option value="duration" ${metric.kind === "duration" ? "selected" : ""}>时长</option></select></label><label>周期<select data-field="period"><option value="day" ${metric.period === "day" ? "selected" : ""}>每日</option><option value="week" ${metric.period === "week" ? "selected" : ""}>每周</option><option value="month" ${metric.period === "month" ? "selected" : ""}>每月</option><option value="lifetime" ${metric.period === "lifetime" ? "selected" : ""}>总计</option></select></label><label>目标<input data-field="target" type="number" min="1" placeholder="无上限" value="${targetValue}"></label>${unitField}${durationUnitField}<button type="button" class="icon-button remove-metric" data-remove="${index}" title="删除指标" aria-label="删除指标">×</button></div>`;
  }).join("");
  $$("[data-remove]").forEach((button) => button.addEventListener("click", () => { const rows = $$(".metric-row"); if (rows.length <= 1) return toast("至少保留一个指标"); button.closest(".metric-row").remove(); }));
  $$(".metric-row [data-field='kind']").forEach((select) => select.addEventListener("change", () => {
    const row = select.closest(".metric-row");
    const isDuration = select.value === "duration";
    row.querySelector("[data-role='unit']").hidden = isDuration;
    row.querySelector("[data-role='durationUnit']").hidden = !isDuration;
  }));
  // 切换时长单位时，把目标数值按比例换算，保持“秒”语义不变。
  $$(".metric-row [data-field='durationUnit']").forEach((select) => select.addEventListener("change", () => {
    const row = select.closest(".metric-row");
    const targetInput = row.querySelector("[data-field='target']");
    if (!targetInput.value) return;
    const fromFactor = DURATION_SECONDS[select.dataset.prevUnit] || 60;
    const toFactor = DURATION_SECONDS[select.value] || 60;
    const seconds = Number(targetInput.value) * fromFactor;
    targetInput.value = seconds / toFactor;
    select.dataset.prevUnit = select.value;
  }));
}


$("#addMetricButton").addEventListener("click", () => { const metrics = $$(".metric-row").map((row) => Object.fromEntries($$("[data-field]", row).map((input) => [input.dataset.field, input.value]))); metrics.push({ name: "新指标", kind: "quantity", period: "day", target: "", unit: "次" }); renderMetricEditor(metrics); });
$("#taskForm").addEventListener("submit", async (event) => { event.preventDefault(); const form = event.currentTarget; const metrics = $$(".metric-row").map((row) => { const result = Object.fromEntries($$("[data-field]", row).map((input) => [input.dataset.field, input.value])); result.metricId = row.dataset.metricId || null; result.target = result.target ? Number(result.target) : null; if (result.kind === "duration") { result.unit = ""; result.durationUnit = result.durationUnit || "minute"; if (result.target != null) result.target = Math.round(result.target * (DURATION_SECONDS[result.durationUnit] || 60)); } else { delete result.durationUnit; } return result; }); const payload = { name: form.name.value, description: form.description.value, startDate: form.startDate.value || null, endDate: form.endDate.value || null, priority: Number(form.priority.value), state: form.state.value, metrics }; try { const endpoint = state.editingId ? `/api/tasks/${state.editingId}` : "/api/tasks"; const method = state.editingId ? "PUT" : "POST"; if (state.editingId) payload.expectedVersion = state.selectedTask.version; const task = await api(endpoint, { method, body: JSON.stringify(payload) }); $("#taskDialog").close(); state.selectedId = task.taskId; toast(state.editingId ? "任务属性已更新" : "任务已创建"); await loadTasks(); } catch (error) { toast(error.message); } });

$("#addTaskButton").addEventListener("click", () => openTaskDialog()); $("#homeButton").addEventListener("click", () => { state.selectedId = null; render(); });
$("#cancelTaskButton").addEventListener("click", () => $("#taskDialog").close());
$("#closeTaskButton").addEventListener("click", () => $("#taskDialog").close());

function renderAdminStats(stats) {
  const cells = [
    ["任务", stats.taskCount, "含回收站"],
    ["活跃", stats.activeTaskCount, "未删除"],
    ["每日事实", stats.dailyFactCount, "条记录"],
    ["归档", stats.archiveCount, "月"],
    ["修订", stats.revisionCount, "次"],
    ["占用", formatBytes(stats.storageBytes), "存储"],
  ];
  return cells.map(([label, value, hint]) => `<div class="summary-cell"><strong>${escapeHtml(value)}</strong><span>${label} · ${hint}</span></div>`).join("");
}

function formatBytes(bytes) { const n = Number(bytes) || 0; if (n < 1024) return `${n} B`; if (n < 1024 * 1024) return `${(n / 1024).toFixed(1)} KB`; return `${(n / 1024 / 1024).toFixed(1)} MB`; }

$("#adminButton").addEventListener("click", async () => {
  try {
    const [result, stats] = await Promise.all([api("/api/tasks?includeDeleted=true"), api("/api/admin/stats")]);
    const all = result.items;
    const deleted = all.filter((task) => task.deletedAt);
    $("#adminStats").innerHTML = `<div class="summary-strip admin-stats-strip">${renderAdminStats(stats)}</div>`;
    $("#taskAdminList").innerHTML = all.map((task) => {
      const badge = task.deletedAt ? `<span class="status-badge paused">已删除</span>` : `<span class="status-badge">${task.state === "paused" ? "挂起" : "进行中"}</span>`;
      const actions = task.deletedAt
        ? `<button class="button" data-restore="${task.taskId}">恢复</button><button class="button danger" data-purge="${task.taskId}">永久删除</button>`
        : `<button class="button" data-admin-delete="${task.taskId}">移入回收站</button>`;
      return `<div class="trash-item"><span><strong>${escapeHtml(task.name)}</strong><small class="muted">${escapeHtml(task.startDate)} · 优先级 ${task.priority} · ${task.metrics.length} 指标</small>${badge}</span><span class="trash-item-actions">${actions}</span></div>`;
    }).join("") || `<p class="muted">暂无任务</p>`;
    $("#trashList").innerHTML = deleted.length ? deleted.map((task) => `<div class="trash-item"><span><strong>${escapeHtml(task.name)}</strong><small class="muted">${task.deletedAt}</small></span><span class="trash-item-actions"><button class="button" data-restore="${task.taskId}">恢复</button><button class="button danger" data-purge="${task.taskId}">永久删除</button></span></div>`).join("") : `<p class="muted">回收站为空</p>`;
    $("#adminDialog").showModal();

    $$("[data-admin-delete]").forEach((button) => button.addEventListener("click", async () => {
      const task = all.find((item) => item.taskId === button.dataset.adminDelete);
      if (!confirm(`将“${task.name}”移入回收站？`)) return;
      try { await api(`/api/tasks/${task.taskId}?expectedVersion=${task.version}`, { method: "DELETE" }); toast("已移入回收站"); $("#adminDialog").close(); await loadTasks(); } catch (error) { toast(error.message); }
    }));
    $$("[data-restore]").forEach((button) => button.addEventListener("click", async () => { try { await api(`/api/tasks/${button.dataset.restore}/restore?expectedVersion=${all.find((task) => task.taskId === button.dataset.restore).version}`, { method: "POST" }); toast("任务已恢复"); $("#adminDialog").close(); await loadTasks(); } catch (error) { toast(error.message); } }));
    $$("[data-purge]").forEach((button) => button.addEventListener("click", async () => { const task = all.find((item) => item.taskId === button.dataset.purge); if (!confirm(`永久删除“${task.name}”？此操作不可恢复。`)) return; try { await api(`/api/tasks/${task.taskId}/purge`, { method: "POST", body: JSON.stringify({ confirmation: task.taskId }) }); toast("任务及其历史已永久删除"); $("#adminDialog").close(); await loadTasks(); } catch (error) { toast(error.message); } }));
  } catch (error) { toast(error.message); }
});
$("#closeAdminButton").addEventListener("click", () => $("#adminDialog").close()); $("#exportButton").addEventListener("click", async () => { const response = await fetch("/api/export"); const blob = await response.blob(); const link = document.createElement("a"); link.href = URL.createObjectURL(blob); link.download = "progress-export.json"; link.click(); URL.revokeObjectURL(link.href); });
$("#importButton").addEventListener("click", () => $("#importFile").click());
$("#importFile").addEventListener("change", async (event) => {
  const file = event.target.files[0]; if (!file) return;
  if (!confirm("导入将【整体替换】当前全部数据，且不可撤销。确认继续？")) { event.target.value = ""; return; }
  try {
    const text = await file.text(); const payload = JSON.parse(text);
    const result = await api("/api/admin/import", { method: "POST", body: JSON.stringify(payload) });
    toast(`已还原 ${result.imported} 个任务`); event.target.value = ""; $("#adminDialog").close(); await loadTasks();
  } catch (error) { toast(error.message); event.target.value = ""; }
});
$("#archiveButton").addEventListener("click", async () => { try { const result = await api("/api/admin/archive", { method: "POST", body: "{}" }); toast(`补归档完成，处理 ${result.closedDays} 天`); } catch (error) { toast(error.message); } }); $("#logoutButton").addEventListener("click", async () => { await api("/api/auth/logout", { method: "POST", body: "{}" }); showLogin(); });
$("#loginForm").addEventListener("submit", async (event) => { event.preventDefault(); try { const response = await fetch("/api/auth/login", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify({ password: event.currentTarget.password.value }) }); const body = await response.json(); if (!response.ok) throw new Error(body.detail || "登录失败"); state.csrf = body.csrfToken; hideLogin(); await loadTasks(); } catch (error) { $("#loginError").textContent = error.message; } });
bootstrap();