/**
 * 相机设备管理相关表
 */

export const up = (pgm) => {
  // 1. 相机设备表 (扩展现有设备表的概念，专门用于相机设备)
  pgm.createTable('camera_devices', {
    id: { type: 'serial', primaryKey: true },
    device_id: { 
      type: 'varchar(255)', 
      unique: true, 
      notNull: true,
      comment: '设备唯一标识符，如CAM-001' 
    },
    name: { 
      type: 'varchar(255)', 
      notNull: true,
      comment: '相机设备名称' 
    },
    location: { 
      type: 'varchar(255)', 
      notNull: true,
      comment: '相机所在地点' 
    },
    status: { 
      type: 'varchar(50)', 
      notNull: true, 
      default: 'offline',
      comment: 'active, maintenance, offline' 
    },
    last_seen_at: { 
      type: 'timestamptz',
      comment: '最后活跃时间' 
    },
    temperature: { 
      type: 'decimal(5,2)',
      comment: '当前温度' 
    },
    cooler_power: { 
      type: 'decimal(5,2)',
      comment: '制冷功率百分比' 
    },
    gain: { 
      type: 'integer',
      comment: 'CCD增益值' 
    },
    exposure_count: { 
      type: 'integer', 
      default: 0,
      comment: '总曝光次数' 
    },
    uptime: { 
      type: 'decimal(10,2)',
      comment: '运行时间(小时)' 
    },
    firmware_version: { 
      type: 'varchar(50)',
      comment: '固件版本' 
    },
    serial_number: { 
      type: 'varchar(100)', 
      unique: true,
      comment: '设备序列号' 
    },
    created_at: { type: 'timestamptz', notNull: true, default: pgm.func('current_timestamp') },
    updated_at: { type: 'timestamptz', notNull: true, default: pgm.func('current_timestamp') }
  });

  // 2. 相机历史记录表 (存储相机状态的历史数据)
  pgm.createTable('camera_history_records', {
    id: { type: 'serial', primaryKey: true },
    camera_device_id: { 
      type: 'integer', 
      notNull: true, 
      references: 'camera_devices(id)', 
      onDelete: 'CASCADE' 
    },
    recorded_at: { 
      type: 'timestamptz', 
      notNull: true, 
      default: pgm.func('current_timestamp') 
    },
    status: { 
      type: 'varchar(50)', 
      notNull: true,
      comment: 'active, maintenance, offline' 
    },
    temperature: { type: 'decimal(5,2)' },
    cooler_power: { type: 'decimal(5,2)' },
    gain: { type: 'integer' },
    exposure_count: { type: 'integer' },
    uptime: { type: 'decimal(10,2)' },
    created_at: { type: 'timestamptz', notNull: true, default: pgm.func('current_timestamp') }
  });

  // 添加索引
  pgm.createIndex('camera_devices', 'device_id');
  pgm.createIndex('camera_devices', 'status');
  pgm.createIndex('camera_history_records', 'camera_device_id');
  pgm.createIndex('camera_history_records', 'recorded_at');
};

export const down = (pgm) => {
  pgm.dropTable('camera_history_records');
  pgm.dropTable('camera_devices');
};