const pool = require('./postgresql.js');
const logger = require('../../logger/src/main.js');

async function getDay(from_currency, conv_currency, date) {
    if (!from_currency || !conv_currency)
        return new Error('fromCurrency and convCurrency are required');
    else if (!date) return new Error('date is required');

    const data = await pool.query(
        'SELECT from_currency, conv_currency, date, rate FROM currency ' +
            'WHERE from_currency = $1 AND conv_currency = $2 AND date = $3',
        [from_currency.toUpperCase(), conv_currency.toUpperCase(), date],
    );

    if (data?.['rows'].length <= 0) return 'Missing data';

    logger.debug(data['rows'][0]);

    return data['rows'][0];
}

async function getPeriod(from_currency, conv_currency, start_date, end_date) {
    if (!from_currency || !conv_currency)
        return new Error('from_currency and conv_currency are required');
    else if (!start_date || !end_date)
        return new Error('start_date and end_date are required');

    const data = await pool.query(
        'SELECT * FROM currency WHERE ' +
            '(date BETWEEN $3 AND $4) AND from_currency = $1 AND conv_currency = $2 ORDER BY date',
        [
            from_currency.toUpperCase(),
            conv_currency.toUpperCase(),
            start_date,
            end_date,
        ],
    );

    if (data?.['rows'].length <= 0) return 'Missing data';

    logger.debug(data['rows']);

    return data['rows'];
}

module.exports = { getDay, getPeriod };