const ParameterizedSQL = require('loopback-connector').ParameterizedSQL;

module.exports = Self => {
    Self.remoteMethod('getTransactions', {
        description: 'Returns last entries',
        accessType: 'READ',
        accepts: [{
            arg: 'filter',
            type: 'Object',
            description: 'Filter defining where, order, offset, and limit - must be a JSON-encoded string',
            http: {source: 'query'}
        }],
        returns: {
            type: ['Object'],
            root: true
        },
        http: {
            path: `/getTransactions`,
            verb: 'GET'
        }
    });

    Self.getTransactions = async filter => {
        let conn = Self.dataSource.connector;
        let stmt = new ParameterizedSQL(`
            SELECT 
                    t.id, 
                    t.clientFk, 
                    t.created, 
                    t.amount / 100 amount,
                    t.receiptFk IS NOT NULL AS isConfirmed,
                    tt.message responseMessage,
                    te.message errorMessage
                FROM hedera.tpvTransaction t
                    JOIN hedera.tpvMerchant m ON m.id = t.merchantFk
                    LEFT JOIN hedera.tpvResponse tt ON tt.id = t.response
                    LEFT JOIN hedera.tpvError te ON te.code = errorCode`);

        stmt.merge(conn.makeSuffix(filter, 't'));

        return await Self.rawStmt(stmt);
    };
};