document.addEventListener("DOMContentLoaded", function() {
    function validateInputPt(inputElement, min, max) {
        const value = parseFloat(inputElement.value);
        if (value < min || value > max) {
            alert(`The value must be a number between ${min} y ${max}.`);
            inputElement.value = ''; 
        }
    }

    function calculateProbabilities() {
        const mPt = parseFloat(document.getElementById('mPt').value);
        const fPt = parseInt(document.getElementById('fPt').value);

        let pmPt = 0;
        for (let i = 0; i < fPt; i++) {
            pmPt += (Math.exp(-mPt) * Math.pow(mPt, i)) / factorial(i);
        }
        pmPt = 1 - pmPt;

        const plPt = 1 - pmPt;

        document.getElementById('pmPt').innerText = (pmPt * 100).toFixed(2); 
        document.getElementById('plPt').innerText = (plPt * 100).toFixed(2); 
    }

    function factorial(n) {
        if (n === 0 || n === 1) {
            return 1;
        }
        let result = 1;
        for (let i = 2; i <= n; i++) {
            result *= i;
        }
        return result;
    }

    document.getElementById('formWrapPt').addEventListener('input', calculateProbabilities);

    const mPt = document.getElementById('mPt');
    const fPt = document.getElementById('fPt');

    const safetyLevelMin = 0, safetyLevelMax = 115; 
    const accidentFrequencyMin = 0, accidentFrequencyMax = 150; 

    mPt.addEventListener('input', () => validateInputPt(mPt, safetyLevelMin, safetyLevelMax));
    fPt.addEventListener('input', () => validateInputPt(fPt, accidentFrequencyMin, accidentFrequencyMax));
});