import config from "@/config";
import { getAllVersion } from "@/api/viewIndex";
import bus from "@/plugins/bus";

function compareVersion(v1, v2) {
  const s1 = String(v1 || "").replace(/[^\d.]/g, "").split(".").map((n) => Number(n) || 0);
  const s2 = String(v2 || "").replace(/[^\d.]/g, "").split(".").map((n) => Number(n) || 0);
  const len = Math.max(s1.length, s2.length);
  for (let i = 0; i < len; i += 1) {
    const n1 = s1[i] || 0;
    const n2 = s2[i] || 0;
    if (n1 > n2) return 1;
    if (n1 < n2) return -1;
  }
  return 0;
}

function formatFileSize(fileSize) {
  const size = Number(fileSize);
  if (!Number.isFinite(size) || size <= 0) return "";
  if (size >= 1024 * 1024 * 1024) return `${(size / (1024 * 1024 * 1024)).toFixed(2)}GB`;
  if (size >= 1024 * 1024) return `${(size / (1024 * 1024)).toFixed(2)}MB`;
  if (size >= 1024) return `${(size / 1024).toFixed(2)}KB`;
  return `${size}B`;
}

async function getCurrentVersion(logPrefix) {
  let currentVersion = config?.appInfo?.version || "1.0.0";
  console.log(`${logPrefix} 开始获取当前版本，默认值:`, currentVersion);
  // #ifdef MP-WEIXIN
  try {
    const accountInfo = uni.getAccountInfoSync();
    if (accountInfo?.miniProgram?.version) {
      currentVersion = accountInfo.miniProgram.version;
      console.log(`${logPrefix} 当前环境=MP-WEIXIN，版本=`, currentVersion);
      return currentVersion;
    }
  } catch (e) {
    console.log(`${logPrefix} MP-WEIXIN 获取版本失败:`, e);
  }
  // #endif
  // #ifdef APP-PLUS
  try {
    // APP-PLUS 下，plus.runtime.version 不是业务版本号（经常是运行时/SDK版本），
    // 这里改用 getProperty 取系统层面的 app version。
    // @ts-ignore
    if (plus?.runtime?.getProperty) {
      // @ts-ignore
      const appid = plus.runtime.appid;
      const appInfo = await new Promise((resolve) => {
        // @ts-ignore
        plus.runtime.getProperty(appid, (info) => resolve(info || {}));
      });
      const v = appInfo?.version || appInfo?.versionName || appInfo?.appVersion || "";
      if (v) {
        currentVersion = String(v);
        console.log(`${logPrefix} 当前环境=APP-PLUS，版本=`, currentVersion);
        return currentVersion;
      }
      console.log(`${logPrefix} APP-PLUS 获取到的版本字段为空，将使用配置版本:`, currentVersion);
    }
  } catch (e) {
    console.log(`${logPrefix} APP-PLUS 获取版本失败:`, e);
  }
  // #endif
  console.log(`${logPrefix} 未读取到运行时版本，使用配置版本:`, currentVersion);
  return currentVersion;
}

function installPackage(tempFilePath, logPrefix) {
  console.log(`${logPrefix} 开始安装更新包，临时路径:`, tempFilePath);
  // #ifdef APP-PLUS
  // @ts-ignore
  plus.runtime.install(
    tempFilePath,
    {},
    () => {
      console.log(`${logPrefix} 安装成功，等待用户确认是否重启`);
      uni.showModal({
        title: "更新完成",
        content: "安装包下载成功，是否立即重启应用生效？",
        success: (res) => {
          if (res.confirm) {
            // @ts-ignore
            plus.runtime.restart();
          }
        },
      });
    },
    (err) => {
      console.log(`${logPrefix} 安装失败:`, err);
      uni.showToast({ title: err?.message || "安装更新包失败", icon: "none" });
    }
  );
  // #endif
}

function buildFullDownloadUrl(rawUrl) {
  const u = String(rawUrl || "").trim();
  if (!u) return "";
  // 已经是绝对地址，直接返回
  if (/^https?:\/\//i.test(u)) return u;
  const base = String(config?.fileUrl || config?.baseUrl || "").replace(/\/+$/, "");
  const path = u.startsWith("/") ? u : `/${u}`;
  return `${base}${path}`;
}

function emitDownloadProgress(payload, logPrefix) {
  try {
    bus.$emit("versionUpgrade:downloadProgress", payload);
  } catch (e) {
    console.log(`${logPrefix} downloadProgress 事件派发失败:`, e);
  }
}

function downloadVersionPackage(url, logPrefix, fileSize) {
  const fullUrl = buildFullDownloadUrl(url);
  console.log(`${logPrefix} 开始下载更新包:`, { rawUrl: url, fullUrl });
  if (!fullUrl) {
    uni.showToast({ title: "更新附件地址无效", icon: "none" });
    return;
  }
  const totalSize = Number(fileSize);
  const hasTotalSize = Number.isFinite(totalSize) && totalSize > 0;
  console.log(`${logPrefix} 下载大小信息:`, { fileSize, totalSize, hasTotalSize });
  emitDownloadProgress({ show: true, progress: 0, title: "更新包下载中..." }, logPrefix);
  const task = uni.downloadFile({
    url: fullUrl,
    success: (res) => {
      console.log(`${logPrefix} 下载结果:`, res);
      emitDownloadProgress({ show: false }, logPrefix);
      if (res.statusCode !== 200 || !res.tempFilePath) {
        console.log(`${logPrefix} 下载失败，状态码或临时路径异常`);
        uni.showToast({ title: "下载失败，请稍后重试", icon: "none" });
        return;
      }
      const lowerUrl = String(fullUrl || "").toLowerCase();
      const isInstallPkg = lowerUrl.endsWith(".wgt") || lowerUrl.endsWith(".wgtu") || lowerUrl.endsWith(".apk");
      console.log(`${logPrefix} 文件类型判断:`, { lowerUrl, isInstallPkg });
      if (isInstallPkg) {
        installPackage(res.tempFilePath, logPrefix);
        return;
      }
      uni.openDocument({
        filePath: res.tempFilePath,
        showMenu: true,
        fail: () => {
          console.log(`${logPrefix} 非安装包，openDocument 失败，提示用户手动查看`);
          uni.showToast({ title: "下载成功，请在文件管理中查看", icon: "none" });
        },
      });
    },
    fail: (err) => {
      console.log(`${logPrefix} 下载请求失败:`, err);
      emitDownloadProgress({ show: false }, logPrefix);
      uni.showToast({ title: "下载失败，请检查网络", icon: "none" });
    },
  });

  // 下载进度：部分端（APP/小程序）支持 onProgressUpdate
  try {
    if (task && typeof task.onProgressUpdate === "function") {
      task.onProgressUpdate((p) => {
        const downloadedSize = Number(p?.totalBytesWritten ?? p?.writtenBytes ?? p?.downloadedSize);
        const expectedSize = Number(p?.totalBytesExpectedToWrite ?? p?.totalBytesExpected ?? p?.totalSize);
        const denom = hasTotalSize ? totalSize : (Number.isFinite(expectedSize) && expectedSize > 0 ? expectedSize : 0);

        let progress = Number(p?.progress);
        if (!(Number.isFinite(progress) && progress >= 0 && progress <= 100) && denom > 0 && Number.isFinite(downloadedSize) && downloadedSize >= 0) {
          progress = (downloadedSize / denom) * 100;
        }
        if (!Number.isFinite(progress)) return;

        emitDownloadProgress({ show: true, progress, title: "更新包下载中..." }, logPrefix);
      });
    }
  } catch (e) {
    console.log(`${logPrefix} onProgressUpdate 绑定失败:`, e);
  }
}

async function checkAppVersionUpgrade(logPrefix, currentVersion) {
  try {
    console.log(`${logPrefix} 开始检查版本升级`);
    const params = {
      records: "",
      total: 1,
      size: 1,
      current: 1,
      orders: "",
      optimizeCountSql: true,
      searchCount: true,
      optimizeJoinOfCountSql: true,
      maxLimit: 1,
      countId: "",
      id: 1,
      name: "",
      version: "",
      createTime: "2026-04-09 10:10:33",
      updateTime: "2026-04-09 10:10:33",
      createUser: 1,
      updateUser: 1,
      tenantId: 1,
    };
    console.log(`${logPrefix} 查询参数:`, params);
    const res = await getAllVersion(params);
    console.log(`${logPrefix} 接口返回:`, res);
    const first = Array.isArray(res?.rows)
      ? res.rows[0]
      : Array.isArray(res?.data?.records)
        ? res.data.records[0]
        : Array.isArray(res?.data)
          ? res.data[0]
          : res?.data;
    if (!first) {
      console.log(`${logPrefix} 未获取到第一条版本数据，结束检查`);
      return;
    }
    console.log(`${logPrefix} 第一条版本数据:`, first);
    const latestVersion = String(first?.version || "");
    if (!latestVersion) {
      console.log(`${logPrefix} 第一条数据无版本号，结束检查`);
      return;
    }
    const compareResult = compareVersion(latestVersion, currentVersion);
    console.log(`${logPrefix} 版本比较:`, { currentVersion, latestVersion, compareResult });
    if (compareResult <= 0) {
      console.log(`${logPrefix} 当前已是最新版本，无需更新`);
      return;
    }
    const firstFile = Array.isArray(first?.commonFileList) ? first.commonFileList[0] : null;
    const downloadUrl = firstFile?.url || firstFile?.downloadUrl || "";
    const fileSizeText = formatFileSize(firstFile?.fileSize);
    console.log(`${logPrefix} 更新附件信息:`, {
      downloadUrl,
      fileSize: firstFile?.fileSize,
      fileSizeText,
      firstFile,
    });
    const desc = fileSizeText ? `，更新包大小约 ${fileSizeText}` : "";
    uni.showModal({
      title: "发现新版本",
      content: `当前版本 ${currentVersion}，最新版本 ${latestVersion}${desc}，是否立即下载？`,
      confirmText: "立即下载",
      success: (modalRes) => {
        console.log(`${logPrefix} 更新弹窗操作:`, modalRes);
        if (!modalRes.confirm) return;
        if (!downloadUrl) {
          console.log(`${logPrefix} 用户确认更新，但附件地址为空`);
          uni.showToast({ title: "未找到更新附件地址", icon: "none" });
          return;
        }
        downloadVersionPackage(downloadUrl, logPrefix, firstFile?.fileSize);
      },
    });
  } catch (e) {
    console.log(`${logPrefix} 版本检查失败:`, e);
  }
}

export function createVersionUpgradeChecker(options = {}) {
  const throttleMs = Number(options.throttleMs) > 0 ? Number(options.throttleMs) : 3000;
  const logPrefix = options.logPrefix || "[version]";
  let lastVersionCheckAt = 0;

  const triggerVersionCheck = async (from = "unknown") => {
    const now = Date.now();
    if (now - lastVersionCheckAt < throttleMs) {
      console.log(`${logPrefix} 跳过重复检查，来源=${from}`);
      return;
    }
    lastVersionCheckAt = now;
    console.log(`${logPrefix} 触发版本检查，来源=${from}`);
    const currentVersion = await getCurrentVersion(logPrefix);
    await checkAppVersionUpgrade(logPrefix, currentVersion);
  };

  return { triggerVersionCheck };
}