const fs = require('fs');
const optimum = 500;

function find(path) {
    let output = [];
    for (let content of fs.readdirSync(path, {withFileTypes: true})) {
        if (content.isDirectory()) {
            output.push(...find(path + '/' + content.name));
        } else {
            output.push(path + '/' + content.name);
        }
    }
    return output;
}

function optimizeCurve(path) {
    let input = fs.readFileSync(path, 'utf-8')
        .split('\n')
        .map((x) => x.split(' '));

    let output = [input[0]];

    let step = Math.floor(input.length / optimum);

    for (let i = 1; i < input.length; i += step) {
        output.push(input[i]);
    }

    fs.writeFileSync(path.slice(0, - '-full.dat'.length) + '.dat', output.map((x) => x.join(' ')).join('\n'));
}

for (let file of find('.')) {
    if (file.endsWith('-full.dat')) {
        optimizeCurve(file);
    }
}