const Sequelize = require('sequelize');

/**
 * 版本信息表模型
 * 存储应用版本信息，支持多平台多架构
 */
module.exports = (db) => {
  const version_info = db.define("version_info", {
    // 版本基本信息
    version: {
      comment: '版本号（x.y.z 格式）',
      type: Sequelize.STRING(20),
      allowNull: false
    },
    platform: {
      comment: '平台类型（win32/darwin/linux）',
      type: Sequelize.STRING(20),
      allowNull: false
    },
    arch: {
      comment: '架构类型（x64/ia32/arm64）',
      type: Sequelize.STRING(20),
      allowNull: false
    },
    
    // 文件信息
    download_url: {
      comment: '下载地址',
      type: Sequelize.STRING(500),
      allowNull: false
    },
    file_path: {
      comment: '服务器文件路径',
      type: Sequelize.STRING(500),
      allowNull: false
    },
    file_size: {
      comment: '文件大小（字节）',
      type: Sequelize.BIGINT,
      allowNull: true,
      defaultValue: 0
    },
    file_hash: {
      comment: 'SHA256 哈希值',
      type: Sequelize.STRING(64),
      allowNull: true
    },
    
    // 更新信息
    release_notes: {
      comment: '更新日志',
      type: Sequelize.TEXT,
      allowNull: true
    },
    force_update: {
      comment: '是否强制更新（1:是 0:否）',
      type: Sequelize.TINYINT(1),
      allowNull: false,
      defaultValue: 0
    },
    
    // 状态信息
    status: {
      comment: '状态（1:启用 0:禁用）',
      type: Sequelize.TINYINT(1),
      allowNull: false,
      defaultValue: 1
    },
    
  }, {
    timestamps: false,
    indexes: [
      {
        unique: true,
        fields: ['version', 'platform', 'arch']
      },
      {
        unique: false,
        fields: ['platform', 'arch', 'status']
      }
    ]
  });

  return version_info;
};