// JavaScript sample file with technical debt comments

function calculateTotal(items) {
    // TODO: This should use reduce instead of a loop
    let total = 0;
    for (let i = 0; i < items.length; i++) {
        total += items[i].price;
    }
    return total;
}

function fetchUserData(userId) {
    // FIXME: API error handling is missing
    // FIXME: This endpoint may return null
    return fetch(`/api/users/${userId}`)
        .then(response => response.json());
}

function processPayment(amount) {
    // HACK: Quick fix for holiday season
    if (amount > 1000) {
        console.log("High value transaction");
    }
    // TODO: Implement proper payment processing
}

function createUser(name, email) {
    // NOTE: Email validation is basic
    if (!email.includes('@')) {
        throw new Error('Invalid email');
    }
    return { name, email };
}

class DataProcessor {
    constructor() {
        this.data = [];
        // XXX: Memory leak - data is never cleared
    }

    addItem(item) {
        this.data.push(item);
    }

    process() {
        // BUG: This doesn't handle edge cases
        return this.data.map(x => x * 2);
    }
}

// TODO: Add JSDoc comments
// TODO: Write unit tests

async function loadConfig() {
    // FIXME: Hardcoded path should be configurable
    const response = await fetch('/config.json');
    return response.json();
}

function temporaryFix() {
    // TEMP: Remove this after Q1
    return { status: 'pending' };
}

function oldCode() {
    // REFACTOR: This code is legacy
    let result = 0;
    for (let i = 0; i < 10; i++) {
        result += i;
    }
    return result;
}

module.exports = {
    calculateTotal,
    fetchUserData,
    processPayment,
    createUser,
    DataProcessor,
    loadConfig,
};