/* 演示插件的前端逻辑：全部能力都走宿主注入的 window.svfs（Promise）。 */
"use strict";

var $ = function (id) { return document.getElementById(id); };
var PLUGIN_VERSION = "1.0.0";

function randomColor() {
  var letters = "0123456789abcdef", out = "#";
  for (var i = 0; i < 6; i++) out += letters[Math.floor(Math.random() * 16)];
  return out;
}

async function main() {
  if (!window.svfsReady) {
    $("missing").hidden = false;
    $("version").textContent = "插件 " + PLUGIN_VERSION + "（未连接宿主）";
    return;
  }
  var svfs = await window.svfsReady;

  var info = await svfs.host.info();
  $("version").textContent = "插件 " + PLUGIN_VERSION + "  ·  桥 API v" + info.apiVersion;
  $("host-info").innerHTML = "";
  [["插件 id", info.pluginId], ["宿主", info.appName + " " + info.appVersion],
   ["平台", info.platform], ["来源", info.source || "-"]]
    .forEach(function (row) {
      var dt = document.createElement("dt"); dt.textContent = row[0];
      var dd = document.createElement("dd"); dd.textContent = row[1];
      $("host-info").append(dt, dd);
    });

  // storage：按插件隔离的键值存储，换一台机器/重装插件也不会串到别的插件
  var count = 0;
  try {
    count = parseInt(await svfs.storage.get("visits"), 10) || 0;
    count += 1;
    await svfs.storage.set("visits", count);
  } catch (e) { /* 没拿到 storage 权限时静默降级 */ }
  $("count").textContent = String(count);
  $("reset").onclick = async function () {
    await svfs.storage.set("visits", 0);
    $("count").textContent = "0";
    svfs.ui.notify("计数已清零");
  };
  $("add10").onclick = async function () {
    count += 10;
    await svfs.storage.set("visits", count);
    $("count").textContent = String(count);
  };

  $("notify").onclick = function () {
    svfs.ui.notify("来自 " + info.pluginId + " 的通知（" + PLUGIN_VERSION + "）");
  };
  $("paint").onclick = function () {
    svfs.ui.setTitle("SVFS Client · 演示插件 " + randomColor());
  };

  $("changelog").textContent = "初始版本";
}

main();