const { REQUEST_TYPES, DOCUMENT_TYPES } = require('../config/constants');

module.exports = (sequelize, DataTypes) => {
    const Document = sequelize.define('Document', {
        id: {
            type: DataTypes.UUID,
            defaultValue: DataTypes.UUIDV4,
            primaryKey: true
        },
        requestId: {
            type: DataTypes.UUID,
            allowNull: false
        },
        requestType: {
            type: DataTypes.ENUM(Object.values(REQUEST_TYPES)),
            allowNull: false
        },
        documentType: {
            type: DataTypes.ENUM(Object.values(DOCUMENT_TYPES)),
            allowNull: false
        },
        fileName: {
            type: DataTypes.STRING,
            allowNull: false
        },
        fileUrl: {
            type: DataTypes.STRING,
            allowNull: false
        },
        fileSize: {
            type: DataTypes.INTEGER,
            allowNull: true
        },
        uploadedBy: {
            type: DataTypes.UUID,
            allowNull: false,
            references: {
                model: 'users',
                key: 'id'
            }
        },
        status: {
            type: DataTypes.STRING,
            defaultValue: 'Active'
        }
    }, {
        tableName: 'documents',
        timestamps: true,
        indexes: [
            { fields: ['requestId'] },
            { fields: ['requestType'] },
            { fields: ['documentType'] }
        ]
    });

    Document.associate = (models) => {
        Document.belongsTo(models.User, {
            foreignKey: 'uploadedBy',
            as: 'uploader'
        });
    };

    return Document;
};