{% extends 'accounts/base.html' %}
{% load static %}

{% block title %}Login - Accounts{% endblock %}

{% block extra_head %}
<style>
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    overflow: hidden;
}

.login-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem;
    text-align: center;
}

.login-body {
    padding: 2rem;
}

.form-floating {
    margin-bottom: 1rem;
}

.btn-login {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 10px;
    padding: 12px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.social-login {
    display: flex;
    gap: 1rem;
    margin: 1.5rem 0;
}

.btn-social {
    flex: 1;
    padding: 12px;
    border-radius: 10px;
    border: 2px solid #e9ecef;
    background: white;
    transition: all 0.3s ease;
}

.btn-social:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.btn-google {
    color: #db4437;
    border-color: #db4437;
}

.btn-github {
    color: #333;
    border-color: #333;
}

.divider {
    text-align: center;
    margin: 1.5rem 0;
    position: relative;
}

.divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: #e9ecef;
}

.divider span {
    background: white;
    padding: 0 1rem;
    color: #6c757d;
    font-size: 0.9rem;
}

.security-features {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 1rem;
    margin-top: 1.5rem;
}

.security-feature {
    display: flex;
    align-items: center;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: #6c757d;
}

.security-feature:last-child {
    margin-bottom: 0;
}

.security-feature i {
    color: #28a745;
    margin-right: 0.5rem;
    width: 16px;
}

.login-footer {
    text-align: center;
    padding: 1rem 2rem 2rem;
    color: #6c757d;
    font-size: 0.9rem;
}

.login-footer a {
    color: #667eea;
    text-decoration: none;
}

.login-footer a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .login-container {
        padding: 1rem;
    }
    
    .login-card {
        width: 100%;
        margin: 0;
    }
    
    .social-login {
        flex-direction: column;
    }
}
</style>
{% endblock %}

{% block content %}
<div class="login-container">
    <div class="container">
        <div class="row justify-content-center">
            <div class="col-md-6 col-lg-5">
                <div class="login-card">
                    <div class="login-header">
                        <h2 class="mb-0">
                            <i class="fas fa-shield-alt me-2"></i>
                            Welcome Back
                        </h2>
                        <p class="mb-0 mt-2 opacity-75">Sign in to your account</p>
                    </div>
                    
                    <div class="login-body">
                        {% if messages %}
                            {% for message in messages %}
                                <div class="alert alert-{{ message.tags }} alert-dismissible fade show" role="alert">
                                    {{ message }}
                                    <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
                                </div>
                            {% endfor %}
                        {% endif %}
                        
                        {% if form.non_field_errors %}
                            <div class="alert alert-danger">
                                {{ form.non_field_errors }}
                            </div>
                        {% endif %}
                        
                        <form method="post" id="loginForm">
                            {% csrf_token %}
                            
                            <div class="form-floating">
                                <input type="email" class="form-control {% if form.email.errors %}is-invalid{% endif %}" 
                                       id="id_email" name="email" placeholder="Email address" 
                                       value="{{ form.email.value|default:'' }}" required>
                                <label for="id_email">Email address</label>
                                {% if form.email.errors %}
                                    <div class="invalid-feedback">
                                        {{ form.email.errors.0 }}
                                    </div>
                                {% endif %}
                            </div>
                            
                            <div class="form-floating">
                                <input type="password" class="form-control {% if form.password.errors %}is-invalid{% endif %}" 
                                       id="id_password" name="password" placeholder="Password" required>
                                <label for="id_password">Password</label>
                                <div class="position-absolute" style="right: 15px; top: 50%; transform: translateY(-50%); cursor: pointer;" 
                                     onclick="togglePassword()">
                                    <i class="fas fa-eye" id="passwordToggle"></i>
                                </div>
                                {% if form.password.errors %}
                                    <div class="invalid-feedback">
                                        {{ form.password.errors.0 }}
                                    </div>
                                {% endif %}
                            </div>
                            
                            <div class="row mb-3">
                                <div class="col-6">
                                    <div class="form-check">
                                        <input class="form-check-input" type="checkbox" id="remember_me" name="remember_me">
                                        <label class="form-check-label" for="remember_me">
                                            Remember me
                                        </label>
                                    </div>
                                </div>
                                <div class="col-6 text-end">
                                    <a href="{% url 'accounts:password_reset' %}" class="text-decoration-none">
                                        Forgot password?
                                    </a>
                                </div>
                            </div>
                            
                            <button type="submit" class="btn btn-primary btn-login w-100" id="loginButton">
                                <span class="spinner-border spinner-border-sm me-2 d-none" id="loginSpinner"></span>
                                <i class="fas fa-sign-in-alt me-2"></i>
                                Sign In
                            </button>
                        </form>
                        
                        {% if social_auth_enabled %}
                        <div class="divider">
                            <span>or continue with</span>
                        </div>
                        
                        <div class="social-login">
                            {% if google_auth_enabled %}
                            <a href="{% url 'social:begin' 'google-oauth2' %}" class="btn btn-social btn-google">
                                <i class="fab fa-google me-2"></i>
                                Google
                            </a>
                            {% endif %}
                            
                            {% if github_auth_enabled %}
                            <a href="{% url 'social:begin' 'github' %}" class="btn btn-social btn-github">
                                <i class="fab fa-github me-2"></i>
                                GitHub
                            </a>
                            {% endif %}
                        </div>
                        {% endif %}
                        
                        <div class="security-features">
                            <h6 class="mb-2"><i class="fas fa-shield-alt me-2"></i>Security Features</h6>
                            <div class="security-feature">
                                <i class="fas fa-check"></i>
                                <span>256-bit SSL encryption</span>
                            </div>
                            <div class="security-feature">
                                <i class="fas fa-check"></i>
                                <span>Two-factor authentication</span>
                            </div>
                            <div class="security-feature">
                                <i class="fas fa-check"></i>
                                <span>Account lockout protection</span>
                            </div>
                            <div class="security-feature">
                                <i class="fas fa-check"></i>
                                <span>Login attempt monitoring</span>
                            </div>
                        </div>
                    </div>
                    
                    <div class="login-footer">
                        {% if registration_enabled %}
                        <p class="mb-2">
                            Don't have an account? 
                            <a href="{% url 'accounts:register' %}">Create one here</a>
                        </p>
                        {% endif %}
                        <p class="mb-0">
                            <a href="{% url 'accounts:help' %}">Need help?</a> • 
                            <a href="{% url 'accounts:privacy' %}">Privacy Policy</a> • 
                            <a href="{% url 'accounts:terms' %}">Terms of Service</a>
                        </p>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>

<!-- Account Locked Modal -->
<div class="modal fade" id="accountLockedModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header bg-warning text-dark">
                <h5 class="modal-title">
                    <i class="fas fa-lock me-2"></i>
                    Account Temporarily Locked
                </h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body">
                <div class="text-center mb-3">
                    <i class="fas fa-exclamation-triangle text-warning" style="font-size: 3rem;"></i>
                </div>
                <p class="text-center mb-3">
                    Your account has been temporarily locked due to multiple failed login attempts.
                </p>
                <div class="alert alert-info">
                    <h6><i class="fas fa-info-circle me-2"></i>What you can do:</h6>
                    <ul class="mb-0">
                        <li>Wait for the lockout period to expire</li>
                        <li>Contact an administrator for immediate unlock</li>
                        <li>Use the "Forgot Password" option to reset your password</li>
                    </ul>
                </div>
                <div class="text-center">
                    <p class="mb-0"><strong>Lockout expires in:</strong></p>
                    <div id="lockoutTimer" class="h4 text-warning">--:--</div>
                </div>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Close</button>
                <a href="{% url 'accounts:password_reset' %}" class="btn btn-primary">
                    <i class="fas fa-key me-1"></i>Reset Password
                </a>
            </div>
        </div>
    </div>
</div>

<!-- Two-Factor Authentication Modal -->
<div class="modal fade" id="twoFactorModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title">
                    <i class="fas fa-mobile-alt me-2"></i>
                    Two-Factor Authentication
                </h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body">
                <div class="text-center mb-3">
                    <i class="fas fa-shield-alt text-primary" style="font-size: 3rem;"></i>
                </div>
                <p class="text-center mb-3">
                    Please enter the 6-digit code from your authenticator app.
                </p>
                <form id="twoFactorForm">
                    {% csrf_token %}
                    <div class="mb-3">
                        <label for="verification_code" class="form-label">Verification Code</label>
                        <input type="text" class="form-control text-center" id="verification_code" 
                               name="verification_code" placeholder="000000" maxlength="6" 
                               pattern="[0-9]{6}" required>
                        <div class="form-text">Enter the 6-digit code from your authenticator app</div>
                    </div>
                    <div class="form-check mb-3">
                        <input class="form-check-input" type="checkbox" id="trust_device" name="trust_device">
                        <label class="form-check-label" for="trust_device">
                            Trust this device for 30 days
                        </label>
                    </div>
                </form>
                <div class="text-center">
                    <p class="mb-0">Having trouble? <a href="#" onclick="showBackupCodes()">Use backup codes</a></p>
                </div>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Cancel</button>
                <button type="button" class="btn btn-primary" onclick="verifyTwoFactor()">
                    <i class="fas fa-check me-1"></i>Verify
                </button>
            </div>
        </div>
    </div>
</div>
{% endblock %}

{% block extra_js %}
<script>
// Form submission handling
document.getElementById('loginForm').addEventListener('submit', function(e) {
    e.preventDefault();
    
    const button = document.getElementById('loginButton');
    const spinner = document.getElementById('loginSpinner');
    const form = this;
    
    // Show loading state
    button.disabled = true;
    spinner.classList.remove('d-none');
    button.innerHTML = '<span class="spinner-border spinner-border-sm me-2"></span>Signing in...';
    
    // Submit form data
    const formData = new FormData(form);
    
    fetch(form.action || window.location.href, {
        method: 'POST',
        body: formData,
        headers: {
            'X-Requested-With': 'XMLHttpRequest'
        }
    })
    .then(response => response.json())
    .then(data => {
        if (data.success) {
            if (data.requires_2fa) {
                // Show 2FA modal
                new bootstrap.Modal(document.getElementById('twoFactorModal')).show();
            } else {
                // Redirect to dashboard or next page
                window.location.href = data.redirect_url || '{% url "accounts:dashboard" %}';
            }
        } else if (data.account_locked) {
            // Show account locked modal
            if (data.lockout_time) {
                startLockoutTimer(data.lockout_time);
            }
            new bootstrap.Modal(document.getElementById('accountLockedModal')).show();
        } else {
            // Show error message
            showError(data.error || 'Invalid email or password');
        }
    })
    .catch(error => {
        showError('An error occurred. Please try again.');
    })
    .finally(() => {
        // Reset button state
        button.disabled = false;
        spinner.classList.add('d-none');
        button.innerHTML = '<i class="fas fa-sign-in-alt me-2"></i>Sign In';
    });
});

// Password visibility toggle
function togglePassword() {
    const passwordField = document.getElementById('id_password');
    const toggleIcon = document.getElementById('passwordToggle');
    
    if (passwordField.type === 'password') {
        passwordField.type = 'text';
        toggleIcon.classList.remove('fa-eye');
        toggleIcon.classList.add('fa-eye-slash');
    } else {
        passwordField.type = 'password';
        toggleIcon.classList.remove('fa-eye-slash');
        toggleIcon.classList.add('fa-eye');
    }
}

// Two-factor authentication verification
function verifyTwoFactor() {
    const code = document.getElementById('verification_code').value;
    const trustDevice = document.getElementById('trust_device').checked;
    
    if (!/^[0-9]{6}$/.test(code)) {
        showError('Please enter a valid 6-digit code');
        return;
    }
    
    fetch('{% url "accounts:verify_2fa" %}', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json',
            'X-CSRFToken': document.querySelector('[name=csrfmiddlewaretoken]').value
        },
        body: JSON.stringify({
            code: code,
            trust_device: trustDevice
        })
    })
    .then(response => response.json())
    .then(data => {
        if (data.success) {
            window.location.href = data.redirect_url || '{% url "accounts:dashboard" %}';
        } else {
            showError(data.error || 'Invalid verification code');
        }
    })
    .catch(error => {
        showError('An error occurred during verification');
    });
}

// Show backup codes
function showBackupCodes() {
    // Implementation for backup codes
    alert('Backup codes functionality would be implemented here');
}

// Lockout timer
function startLockoutTimer(lockoutTime) {
    const timer = document.getElementById('lockoutTimer');
    const endTime = new Date(lockoutTime).getTime();
    
    const interval = setInterval(() => {
        const now = new Date().getTime();
        const distance = endTime - now;
        
        if (distance < 0) {
            clearInterval(interval);
            timer.innerHTML = 'Expired';
            // Hide modal and allow retry
            bootstrap.Modal.getInstance(document.getElementById('accountLockedModal')).hide();
            return;
        }
        
        const minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
        const seconds = Math.floor((distance % (1000 * 60)) / 1000);
        
        timer.innerHTML = `${minutes.toString().padStart(2, '0')}:${seconds.toString().padStart(2, '0')}`;
    }, 1000);
}

// Show error message
function showError(message) {
    // Remove existing alerts
    document.querySelectorAll('.alert-danger').forEach(alert => alert.remove());
    
    // Create new alert
    const alertDiv = document.createElement('div');
    alertDiv.className = 'alert alert-danger alert-dismissible fade show';
    alertDiv.innerHTML = `
        ${message}
        <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
    `;
    
    // Insert at top of form
    const form = document.getElementById('loginForm');
    form.insertBefore(alertDiv, form.firstChild);
}

// Auto-focus on email field
document.addEventListener('DOMContentLoaded', function() {
    document.getElementById('id_email').focus();
    
    // Format verification code input
    const codeInput = document.getElementById('verification_code');
    if (codeInput) {
        codeInput.addEventListener('input', function(e) {
            // Only allow numbers
            this.value = this.value.replace(/[^0-9]/g, '');
            
            // Auto-submit when 6 digits entered
            if (this.value.length === 6) {
                setTimeout(() => verifyTwoFactor(), 500);
            }
        });
    }
});

// Handle Enter key in verification code
document.addEventListener('keypress', function(e) {
    if (e.key === 'Enter' && document.getElementById('twoFactorModal').classList.contains('show')) {
        verifyTwoFactor();
    }
});
</script>
{% endblock %}