import { IsTaskPlugin, pluginGroups, RunStrategy, TaskInput } from "@certd/pipeline";
import fs from "fs";
import path from "path";
import dayjs from "dayjs";
import { AbstractPlusTaskPlugin } from "@certd/plugin-plus";
import JSZip from "jszip";
import * as os from "node:os";
import { OssClientContext, ossClientFactory, OssClientRemoveByOpts, SshAccess, SshClient } from "@certd/plugin-lib";
import { pipeline } from "stream/promises";
const defaultBackupDir = "certd_backup";
const defaultFilePrefix = "db_backup";

@IsTaskPlugin({
  name: "DBBackupPlugin",
  title: "数据库备份",
  icon: "lucide:database-backup",
  desc: "【仅管理员可用】仅支持备份SQLite数据库",
  group: pluginGroups.admin.key,
  showRunStrategy: true,
  default: {
    strategy: {
      runStrategy: RunStrategy.AlwaysRun,
    },
  },
  onlyAdmin: true,
  needPlus: true,
})
export class DBBackupPlugin extends AbstractPlusTaskPlugin {
  @TaskInput({
    title: "备份方式",
    value: "local",
    component: {
      name: "a-select",
      options: [
        { label: "本地复制", value: "local" },
        { label: "ssh上传", value: "ssh" },
        { label: "oss上传", value: "oss" },
      ],
      placeholder: "",
    },
    helper: "支持本地复制、ssh上传",
    required: true,
  })
  backupMode = "local";

  @TaskInput({
    title: "主机登录授权",
    component: {
      name: "access-selector",
      type: "ssh",
    },
    mergeScript: `
      return {
         show:ctx.compute(({form})=>{
          return form.backupMode === 'ssh';
        })
      }
    `,
    required: true,
  })
  sshAccessId!: number;

  @TaskInput({
    title: "OSS类型",
    component: {
      name: "a-select",
      options: [
        { value: "alioss", label: "阿里云OSS" },
        { value: "s3", label: "MinIO/S3" },
        { value: "qiniuoss", label: "七牛云" },
        { value: "tencentcos", label: "腾讯云COS" },
        { value: "ftp", label: "Ftp" },
        { value: "sftp", label: "Sftp" },
      ],
    },
    mergeScript: `
      return {
         show:ctx.compute(({form})=>{
          return form.backupMode === 'oss';
        })
      }
    `,
    required: true,
  })
  ossType!: string;

  @TaskInput({
    title: "OSS授权",
    component: {
      name: "access-selector",
    },
    mergeScript: `
      return {
        show:ctx.compute(({form})=>{
          return form.backupMode === 'oss';
        }),
        component:{
          type: ctx.compute(({form})=>{
            return form.ossType;
          }),
        }
      }
    `,
    required: true,
  })
  ossAccessId!: number;

  @TaskInput({
    title: "备份保存目录",
    component: {
      name: "a-input",
      type: "value",
      placeholder: `默认${defaultBackupDir}`,
    },
    helper: `ssh方式默认保存在当前用户的${defaultBackupDir}目录下，本地方式默认保存在data/${defaultBackupDir}目录下，也可以填写绝对路径`,
    required: false,
  })
  backupDir: string = defaultBackupDir;

  @TaskInput({
    title: "备份文件前缀",
    component: {
      name: "a-input",
      vModel: "value",
      placeholder: `默认${defaultFilePrefix}`,
    },
    required: false,
  })
  filePrefix: string = defaultFilePrefix;

  @TaskInput({
    title: "附加上传文件",
    value: true,
    component: {
      name: "a-switch",
      vModel: "checked",
      placeholder: `是否备份上传的头像等文件`,
    },
    required: false,
  })
  withUpload = true;

  @TaskInput({
    title: "删除过期备份",
    component: {
      name: "a-input-number",
      vModel: "value",
      placeholder: "20",
    },
    helper: "删除多少天前的备份,不填则不删除，windows暂不支持",
    required: false,
  })
  retainDays!: number;

  async onInstance() {}

  async execute(): Promise<void> {
    if (!this.isAdmin()) {
      throw new Error("只有管理员才能运行此任务");
    }

    this.logger.info("开始备份数据库");

    let dbPath = process.env.certd_typeorm_dataSource_default_database;
    dbPath = dbPath || "./data/db.sqlite";
    if (!fs.existsSync(dbPath)) {
      this.logger.error("数据库文件不存在：", dbPath);
      return;
    }
    const dbTmpFilename = `${this.filePrefix}_${dayjs().format("YYYYMMDD_HHmmss")}_sqlite`;
    const dbZipFilename = `${dbTmpFilename}.zip`;
    const tempDir = path.resolve(os.tmpdir(), "certd_backup");
    if (!fs.existsSync(tempDir)) {
      await fs.promises.mkdir(tempDir, { recursive: true });
    }
    const dbTmpPath = path.resolve(tempDir, dbTmpFilename);
    const dbZipPath = path.resolve(tempDir, dbZipFilename);

    try {
      //复制到临时目录
      await fs.promises.copyFile(dbPath, dbTmpPath);
      // //本地压缩
      // const zip = new JSZip();
      // const stream = fs.createReadStream(dbTmpPath);
      // // 使用流的方式添加文件内容
      // zip.file(dbTmpFilename, stream, {binary: true, compression: 'DEFLATE'});

      // const uploadDir = path.resolve('data', 'upload');
      // if (this.withUpload && fs.existsSync(uploadDir)) {
      //   zip.folder(uploadDir);
      // }

      // const content = await zip.generateAsync({type: 'nodebuffer'});

      // await fs.promises.writeFile(dbZipPath, content);
      // 创建可写流
      const outputStream = fs.createWriteStream(dbZipPath);
      const zip = new JSZip();

      // 添加数据库文件
      const dbStream = fs.createReadStream(dbTmpPath);
      zip.file(dbTmpFilename, dbStream, { binary: true, compression: "DEFLATE" });

      // 处理上传目录
      const uploadDir = path.resolve("data", "upload");
      if (this.withUpload && fs.existsSync(uploadDir)) {
        zip.folder("upload"); // 注意：这里应该是相对路径
      }

      // 使用流式生成
      const zipStream = zip.generateNodeStream({
        type: "nodebuffer",
        streamFiles: true,
        compression: "DEFLATE",
      });

      // 管道传输
      await pipeline(zipStream, outputStream);
      this.logger.info(`数据库文件压缩完成:${dbZipPath}`);

      this.logger.info("开始备份，当前备份方式：", this.backupMode);
      const backupDir = this.backupDir || defaultBackupDir;
      const backupFilePath = `${backupDir}/${dbZipFilename}`;

      if (this.backupMode === "local") {
        await this.localBackup(dbZipPath, backupDir, backupFilePath);
      } else if (this.backupMode === "ssh") {
        await this.sshBackup(dbZipPath, backupDir, backupFilePath);
      } else if (this.backupMode === "oss") {
        await this.ossBackup(dbZipPath, backupDir, backupFilePath);
      } else {
        throw new Error(`不支持的备份方式:${this.backupMode}`);
      }
    } finally {
      //删除临时目录
      await fs.promises.rm(tempDir, { recursive: true, force: true });
    }

    this.logger.info("数据库备份完成");
  }

  private async localBackup(dbPath: string, backupDir: string, backupPath: string) {
    if (!backupPath.startsWith("/")) {
      backupPath = path.join("./data/", backupPath);
    }
    const dir = path.dirname(backupPath);
    if (!fs.existsSync(dir)) {
      await fs.promises.mkdir(dir, { recursive: true });
    }
    backupPath = path.resolve(backupPath);
    await fs.promises.copyFile(dbPath, backupPath);
    this.logger.info("备份文件路径：", backupPath);

    if (this.retainDays > 0) {
      // 删除过期备份
      this.logger.info("开始删除过期备份文件");
      const files = fs.readdirSync(dir);
      const now = Date.now();
      let count = 0;
      files.forEach(file => {
        const filePath = path.join(dir, file);
        const stat = fs.statSync(filePath);
        if (now - stat.mtimeMs > this.retainDays * 24 * 60 * 60 * 1000) {
          fs.unlinkSync(filePath as fs.PathLike);
          count++;
          this.logger.info("删除过期备份文件：", filePath);
        }
      });
      this.logger.info("删除过期备份文件数:", count);
    }
  }

  private async sshBackup(dbPath: string, backupDir: string, backupPath: string) {
    const access: SshAccess = await this.getAccess(this.sshAccessId);
    const sshClient = new SshClient(this.logger);
    this.logger.info("备份目录：", backupPath);
    await sshClient.uploadFiles({
      connectConf: access,
      transports: [{ localPath: dbPath, remotePath: backupPath }],
      mkdirs: true,
    });
    this.logger.info("备份文件上传完成");

    if (this.retainDays > 0) {
      // 删除过期备份
      this.logger.info("开始删除过期备份文件");
      const isWin = access.windows;
      let script: string[] = [];
      if (isWin) {
        throw new Error("删除过期文件暂不支持windows系统");
        // script = `forfiles /p ${backupDir} /s /d -${this.retainDays} /c "cmd /c del @path"`;
      } else {
        script = [`cd ${backupDir}`, "echo 备份目录", "pwd", `find . -type f -mtime +${this.retainDays} -name '${this.filePrefix}*' -exec rm -f {} \\;`];
      }

      await sshClient.exec({
        connectConf: access,
        script,
      });
      this.logger.info("删除过期备份文件完成");
    }
  }

  private async ossBackup(dbPath: string, backupDir: string, backupPath: string) {
    if (!this.ossAccessId) {
      throw new Error("未配置ossAccessId");
    }
    const access = await this.getAccess(this.ossAccessId);
    const ossType = this.ossType;

    const ctx: OssClientContext = {
      logger: this.logger,
      utils: this.ctx.utils,
      accessService: this.accessService,
    };

    this.logger.info(`开始备份文件到:${ossType}`);
    const client = await ossClientFactory.createOssClientByType(ossType, {
      access,
      ctx,
    });

    await client.upload(backupPath, dbPath);

    if (this.retainDays > 0) {
      // 删除过期备份
      this.logger.info("开始删除过期备份文件");
      const removeByOpts: OssClientRemoveByOpts = {
        dir: backupDir,
        beforeDays: this.retainDays,
      };
      await client.removeBy(removeByOpts);
      this.logger.info("删除过期备份文件完成");
    } else {
      this.logger.info("已禁止删除过期文件");
    }
  }
}

new DBBackupPlugin();