const { DataTypes, Model } = require("sequelize");
const sequelize = require("../../config/sequelize");

class Favorite extends Model { }

const FavoriteModel = () => {
    Favorite.init(
        {
            userId: {
                type: DataTypes.STRING(24),
                allowNull: false,
                primaryKey: true,
                references: {
                    model: 'user',
                    key: 'id'
                }
            },
            articleId: {
                type: DataTypes.INTEGER,
                allowNull: false,
                primaryKey: true,
                references: {
                    model: 'article',
                    key: 'id'
                }
            }
        },
        {
            sequelize,
            tableName: 'favorite',
            timestamps: false,
            indexes: [
                {
                    name: "PRIMARY",
                    unique: true,
                    using: "BTREE",
                    fields: [
                        { name: "userId" },
                        { name: "articleId" },
                    ]
                },
                {
                    name: "articleId",
                    using: "BTREE",
                    fields: [
                        { name: "articleId" },
                    ]
                },
            ]
        }
    );

    Favorite.prototype.toJSONFor = function () {
        return {
            userId: this.userId,
            articleId: this.articleId
        };
    };

    return Favorite;
};

module.exports = FavoriteModel;