import returnCategoriesCSV from './openai.js';

export default async function (transactions, categories) {

    // Split the transactions into array elements and pull out headers
    transactions = transactions.split('\n');
    const headers = transactions.shift();

    // Group the transactions into strings containing chunks of 10 transactions each
    const chunks = [];
    for (let i = 0; i < transactions.length; i += 10) {
        chunks.push(transactions.slice(i, i + 10).join('\n'));
    }

    let categorizedTransactions = []
    for(let i = 0; i < chunks.length; i++) {
        const returnedCSVText = await returnCategoriesCSV(headers+',Category\n'+chunks[i], categories);
        const returnedTransactions = returnedCSVText.split('\n').slice(3); // Remove blank lines and headers return array
        categorizedTransactions = categorizedTransactions.concat(returnedTransactions);
    }

    // Add headers back to the transactions
    categorizedTransactions.unshift(headers+',Category');

    const finalCSV = categorizedTransactions.join('\n').toString()

    return finalCSV
}