// models/News.js
module.exports = (sequelize, DataTypes) => {
  const News = sequelize.define('News', {
    id: {
      type: DataTypes.INTEGER.UNSIGNED,
      primaryKey: true,
      autoIncrement: true
    },
    title: {
      type: DataTypes.STRING,
      allowNull: false,
      comment: '新闻标题'
    },
    content: {
      type: DataTypes.TEXT,
      allowNull: false,
      comment: '新闻内容'
    },
    summary: {
      type: DataTypes.TEXT,
      allowNull: true,
      comment: '新闻摘要'
    },
    author: {
      type: DataTypes.STRING,
      allowNull: true,
      comment: '作者'
    },
    source: {
      type: DataTypes.STRING,
      allowNull: true,
      comment: '新闻来源'
    },
    coverImage: {
      type: DataTypes.STRING,
      allowNull: true,
      comment: '封面图片URL'
    },
    category: {
      type: DataTypes.STRING,
      allowNull: true,
      comment: '新闻分类'
    },
    tags: {
      type: DataTypes.STRING,
      allowNull: true,
      comment: '标签，用逗号分隔'
    },
    viewCount: {
      type: DataTypes.INTEGER.UNSIGNED,
      defaultValue: 0,
      comment: '浏览次数'
    },
    isPublished: {
      type: DataTypes.BOOLEAN,
      defaultValue: true,
      comment: '是否发布'
    },
    publishedAt: {
      type: DataTypes.DATE,
      allowNull: true,
      comment: '发布时间'
    }
  }, {
    tableName: 'news',
    timestamps: true,
    indexes: [
      {
        fields: ['title']
      },
      {
        fields: ['category']
      },
      {
        fields: ['isPublished']
      },
      {
        fields: ['publishedAt']
      }
    ]
  });

  return News;
};