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

class Comment extends Model { }

const CommentModel = () => {
    Comment.init(
        {
            id: {
                autoIncrement: true,
                type: DataTypes.INTEGER,
                allowNull: false,
                primaryKey: true
            },
            body: {
                type: DataTypes.TEXT,
                allowNull: false
            },
            authorId: {
                type: DataTypes.STRING(24),
                allowNull: true,
                references: {
                    model: 'user',
                    key: 'id'
                }
            },
            articleId: {
                type: DataTypes.INTEGER,
                allowNull: true,
                references: {
                    model: 'article',
                    key: 'id'
                }
            }
        },
        {
            sequelize,
            tableName: 'comment',
            timestamps: true,
            indexes: [
                {
                    name: "PRIMARY",
                    unique: true,
                    using: "BTREE",
                    fields: [
                        { name: "id" },
                    ]
                },
                {
                    name: "authorId",
                    using: "BTREE",
                    fields: [
                        { name: "authorId" },
                    ]
                },
                {
                    name: "articleId",
                    using: "BTREE",
                    fields: [
                        { name: "articleId" },
                    ]
                },
            ]
        }
    );

    Comment.prototype.toJSONFor = function () {
        return {
            id: this.id,
            body: this.body
        };
    };

    return Comment;
};

module.exports = CommentModel;