// == 配置 ==
const API_KEY   = "change-me";
const API_HOST  = "https://calendar-widget-api.tunpok.com";
const GET_URL   = `${API_HOST}/tasks`;
const CACHE_FN  = "calendar-widget-task-cache.json";   // 本地缓存文件

// == 处理「点击 cell」==
if (args.queryParameters?.action === "schedule" && args.queryParameters?.id) {
  await scheduleTask(args.queryParameters.id);
  // 小提示：让 Scriptable 返回桌面并刷新 widget
  Script.complete();
  return;
}

// == 入口：拉取数据 & 渲染 widget ==
const data = await safeFetchTasks();      // 若接口失败则自动读取缓存
const widget = buildWidget(data);
Script.setWidget(widget);
Script.complete();

// == 每分钟自动刷新 ==
widget.refreshAfterDate = new Date(Date.now() + 60 * 1000);

// -----------------------------------------------------------------------------
//                               ⬇️  工具函数 ⬇️
// -----------------------------------------------------------------------------

/**
 * 从接口安全拉取任务；失败时返回缓存内容
 */
async function safeFetchTasks() {
  try {
    const req = new Request(GET_URL);
    req.method = "GET";
    req.headers = { "X-Api-Key": API_KEY };
    const json = await req.loadJSON();
    cacheJson(json);            // 拉取成功即写入缓存
    return json;
  } catch (e) {
    return readCache();
  }
}

/**
 * 点击 cell 后调度任务
 */
async function scheduleTask(id) {
  try {
    const url = `${API_HOST}/tasks/${id}/schedule`;
    const req = new Request(url);
    req.method = "POST";
    req.headers = { "X-Api-Key": API_KEY };
    await req.load();           // 无需关心返回值
  } catch (e) {
    // 失败时静默忽略，保持 widget 不变
  }
}

/**
 * 构建并返回 ListWidget
 */
function buildWidget(tasks) {
  // == Widget 初始化 ==
  const w = new ListWidget();
  w.backgroundColor = new Color("#f5f5f9");
  w.setPadding(10, 10, 10, 10);

  const main = w.addStack();
  main.layoutVertically();
  main.centerAlignContent();
  main.spacing = 12;

  // == 布局判定 ==
  let columns = 4, rows = 1;
  switch (config.widgetFamily) {
    case "medium": columns = 2; rows = 2; break;
    case "large":  columns = 4; rows = 2; break;
  }

  let idx = 0;
  const total = tasks.length;

  for (let r = 0; r < rows; r++) {
    const row = main.addStack();
    row.layoutHorizontally();
    row.centerAlignContent();
    row.spacing = 10;

    for (let c = 0; c < columns; c++) {
      if (idx >= total) break;
      const item = tasks[idx++];

      const cell = row.addStack();
      cell.layoutVertically();
      cell.backgroundColor = new Color("#f2f2f2");
      cell.cornerRadius = 16;
      cell.setPadding(10, 25, 10, 25);
      cell.centerAlignContent();
      cell.size = new Size(0, 65);

      // ===== 标题 =====
      const title = cell.addText(item.name);
      title.font = Font.mediumSystemFont(14);
      title.textColor = Color.black();
      title.centerAlignText();

      cell.addSpacer(8);

      // ===== 色条 =====
      const bar = cell.addStack();
      bar.backgroundColor = colorMap(item.color);
      bar.cornerRadius = 8;
      bar.size = new Size(Device.screenSize().width / (columns * 1.8), 10);

      // ===== 点击跳转 =====
      const url = `scriptable:///run?scriptName=${encodeURIComponent(Script.name())}`
                + `&action=schedule&id=${item.id}`;
      cell.url = url;          // 整个 cell 可点击
    }
  }
  return w;
}

/**
 * 根据接口给出的 color 字段返回 Scriptable 的颜色对象
 */
function colorMap(color) {
  switch ((color || "").toLowerCase()) {
    case "green":  return Color.green();
    case "yellow": return Color.yellow();
    case "red":    return Color.red();
    default:       return Color.gray();
  }
}

/**
 * 写缓存
 */
function cacheJson(obj) {
  try {
    const fm = FileManager.local();
    const dir = fm.documentsDirectory();
    const path = fm.joinPath(dir, CACHE_FN);
    fm.writeString(path, JSON.stringify(obj));
  } catch (_) {}
}

/**
 * 读缓存，若无缓存则返回空数组
 */
function readCache() {
  try {
    const fm = FileManager.local();
    const dir = fm.documentsDirectory();
    const path = fm.joinPath(dir, CACHE_FN);
    if (fm.fileExists(path)) {
      const str = fm.readString(path);
      return JSON.parse(str);
    }
  } catch (_) {}
  return [];
}