script.js

let attempts = 0;
let failedAttempts = 0;
let lastAttemptTime = null;

/* NEW: Array to store login history (CO3 requirement) */
let loginHistory = [];

const riskFill = document.getElementById("riskFill");
const timeline = document.getElementById("timeline");
const emailAlert = document.getElementById("emailAlert");

document.getElementById("loginForm").addEventListener("submit", function (e) {
    e.preventDefault();
    analyzeLogin();
});

function sendEmailAlert(reason) {
    emailAlert.innerText = "⚠ Email alert sent to administrator: " + reason;
}

function analyzeLogin() {

    const user = document.getElementById("username").value;
    const pass = document.getElementById("password").value;

    const status = document.getElementById("status");
    const rulesList = document.getElementById("rulesTriggered");
    const riskLevel = document.getElementById("riskLevel");
    const attemptDisplay = document.getElementById("attemptCount");
    const lastAttemptDisplay = document.getElementById("lastAttempt");

    rulesList.innerHTML = "";
    status.innerText = "";

    attempts++;
    attemptDisplay.innerText = attempts;

    const now = new Date();
    lastAttemptDisplay.innerText = now.toLocaleTimeString();

    let risk = 0;
    let triggered = [];

    const validUser = "admin";
    const validPass = "1234";

    /* Rule 1: Multiple attempts */
    if (attempts > 3) {
        risk += 2;
        triggered.push("Multiple login attempts detected");
    }

    /* Rule 2: Rapid login attempts */
    if (lastAttemptTime !== null) {

        const diff = (now - lastAttemptTime) / 1000;

        if (diff < 30) {
            risk += 2;
            triggered.push("Rapid login attempts within short time");
        }
    }

    /* Rule 3: Failed login attempts */

    let success = false;

    if (user !== validUser || pass !== validPass) {

        failedAttempts++;

        if (failedAttempts >= 2) {
            risk += 3;
            triggered.push("Repeated failed login attempts");
        }

    } else {
        success = true;
        failedAttempts = 0;
    }

    /* Rule 4: Unusual login time */

    const hour = now.getHours();

    if (hour >= 0 && hour <= 5) {
        risk += 1;
        triggered.push("Login during unusual hours");
    }

    /* NEW: Store login attempt as an object */

    let loginRecord = {
        username: user,
        time: now.toLocaleTimeString(),
        success: success,
        riskScore: risk
    };

    loginHistory.push(loginRecord);

    console.log("Login History:", loginHistory);

    /* Authentication result */

    if (success && risk === 0) {
        status.style.color = "#9cffc7";
        status.innerText = "Authentication successful. System secure.";
        emailAlert.innerText = "";
    } 
    else {
        status.style.color = "#ff9e9e";
        status.innerText = "Suspicious activity detected.";
    }

    /* Risk level display */

    if (risk <= 1) {
        riskLevel.innerText = "LOW";
        riskLevel.className = "low";
    } 
    else if (risk <= 3) {
        riskLevel.innerText = "MEDIUM";
        riskLevel.className = "medium";
    } 
    else {
        riskLevel.innerText = "HIGH";
        riskLevel.className = "high";

        sendEmailAlert("High risk login behavior detected");
    }

    /* Risk meter */

    let riskPercent = Math.min((risk / 6) * 100, 100);
    riskFill.style.width = riskPercent + "%";

    /* Display triggered rules */

    triggered.forEach(rule => {

        const li = document.createElement("li");
        li.innerText = rule;
        rulesList.appendChild(li);

    });

    /* Timeline */

    const event = document.createElement("li");

    event.innerText = now.toLocaleTimeString() +
        " — Risk level " + riskLevel.innerText;

    timeline.prepend(event);

    if (timeline.children.length > 5) {
        timeline.removeChild(timeline.lastChild);
    }

    lastAttemptTime = now;
}