{% extends 'base.html' %}

{% block title %}Change Password{% endblock %}

{% block content %}
<div class="container-fluid py-4">
    <!-- Header -->
    <div class="d-flex justify-content-between align-items-center mb-4">
        <h2 class="mb-0">
            <i class="fas fa-key text-warning"></i>
            Change Password
        </h2>
        <div>
            <a href="{{ url_for('profile') }}" class="btn btn-outline-secondary">
                <i class="fas fa-arrow-left"></i> Back to Profile
            </a>
        </div>
    </div>

    <!-- Flash Messages -->
    {% with messages = get_flashed_messages(with_categories=true) %}
        {% if messages %}
            {% for category, message in messages %}
                <div class="alert alert-{{ 'danger' if category == 'error' else 'success' }} alert-dismissible fade show" role="alert">
                    <i class="fas fa-{{ 'exclamation-triangle' if category == 'error' else 'check-circle' }} me-2"></i>
                    {{ message }}
                    <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
                </div>
            {% endfor %}
        {% endif %}
    {% endwith %}

    <!-- Change Password Form -->
    <div class="row justify-content-center">
        <div class="col-md-6">
            <div class="card border-warning">
                <div class="card-header bg-warning text-dark">
                    <h5 class="mb-0">
                        <i class="fas fa-key me-2"></i>Update Your Password
                    </h5>
                </div>
                <div class="card-body">
                    <form method="POST" id="changePasswordForm">
                        <div class="mb-3">
                            <label for="current_password" class="form-label">
                                <i class="fas fa-lock me-2"></i>Current Password *
                            </label>
                            <div class="input-group">
                                <input type="password" class="form-control" id="current_password" 
                                       name="current_password" placeholder="Enter current password" required>
                                <span class="input-group-text" onclick="togglePassword('current_password')">
                                    <i class="fas fa-eye" id="currentPasswordToggle"></i>
                                </span>
                            </div>
                        </div>
                        
                        <div class="mb-3">
                            <label for="new_password" class="form-label">
                                <i class="fas fa-lock me-2"></i>New Password *
                            </label>
                            <div class="input-group">
                                <input type="password" class="form-control" id="new_password" 
                                       name="new_password" placeholder="Enter new password" required>
                                <span class="input-group-text" onclick="togglePassword('new_password')">
                                    <i class="fas fa-eye" id="newPasswordToggle"></i>
                                </span>
                            </div>
                            <div class="password-strength" id="passwordStrength"></div>
                            <div class="form-text">Minimum 6 characters recommended</div>
                        </div>
                        
                        <div class="mb-3">
                            <label for="confirm_password" class="form-label">
                                <i class="fas fa-lock me-2"></i>Confirm New Password *
                            </label>
                            <div class="input-group">
                                <input type="password" class="form-control" id="confirm_password" 
                                       name="confirm_password" placeholder="Confirm new password" required>
                                <span class="input-group-text" onclick="togglePassword('confirm_password')">
                                    <i class="fas fa-eye" id="confirmPasswordToggle"></i>
                                </span>
                            </div>
                            <div class="validation-message" id="confirmPasswordValidation"></div>
                        </div>
                        
                        <div class="alert alert-info">
                            <i class="fas fa-info-circle me-2"></i>
                            <strong>Security Tips:</strong>
                            <ul class="mb-0 mt-2">
                                <li>Use a strong password with uppercase, lowercase, numbers, and symbols</li>
                                <li>Don't use the same password for multiple accounts</li>
                                <li>Change your password regularly</li>
                            </ul>
                        </div>
                        
                        <div class="d-grid gap-2">
                            <button type="submit" class="btn btn-warning">
                                <i class="fas fa-key me-2"></i>Update Password
                            </button>
                            <a href="{{ url_for('profile') }}" class="btn btn-outline-secondary">
                                <i class="fas fa-times me-2"></i>Cancel
                            </a>
                        </div>
                    </form>
                </div>
            </div>
        </div>
    </div>
</div>

<style>
.password-strength {
    height: 4px;
    border-radius: 2px;
    margin-top: 5px;
    transition: all 0.3s ease;
}

.strength-weak { background: #dc3545; }
.strength-medium { background: #ffc107; }
.strength-strong { background: #28a745; }

.validation-message {
    font-size: 12px;
    margin-top: 5px;
}

.validation-message.valid {
    color: #28a745;
}

.validation-message.invalid {
    color: #dc3545;
}
</style>

<script>
function togglePassword(fieldId) {
    const passwordField = document.getElementById(fieldId);
    const toggleIcon = document.getElementById(fieldId === 'current_password' ? 'currentPasswordToggle' : 
                                           fieldId === 'new_password' ? 'newPasswordToggle' : 'confirmPasswordToggle');
    
    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');
    }
}

// Password strength checker
function checkPasswordStrength(password) {
    const strengthBar = document.getElementById('passwordStrength');
    let strength = 0;
    
    if (password.length >= 6) strength++;
    if (password.match(/[a-z]/)) strength++;
    if (password.match(/[A-Z]/)) strength++;
    if (password.match(/[0-9]/)) strength++;
    if (password.match(/[^a-zA-Z0-9]/)) strength++;
    
    strengthBar.className = 'password-strength';
    if (strength <= 2) {
        strengthBar.classList.add('strength-weak');
    } else if (strength <= 3) {
        strengthBar.classList.add('strength-medium');
    } else {
        strengthBar.classList.add('strength-strong');
    }
}

// Real-time validation
document.getElementById('new_password').addEventListener('input', function() {
    const password = this.value;
    checkPasswordStrength(password);
});

document.getElementById('confirm_password').addEventListener('input', function() {
    const newPassword = document.getElementById('new_password').value;
    const confirmPassword = this.value;
    const validation = document.getElementById('confirmPasswordValidation');
    
    if (confirmPassword && newPassword !== confirmPassword) {
        validation.textContent = 'Passwords do not match';
        validation.className = 'validation-message invalid';
    } else if (confirmPassword) {
        validation.textContent = 'Passwords match!';
        validation.className = 'validation-message valid';
    } else {
        validation.textContent = '';
    }
});

// Form validation
document.getElementById('changePasswordForm').addEventListener('submit', function(e) {
    const newPassword = document.getElementById('new_password').value;
    const confirmPassword = document.getElementById('confirm_password').value;
    
    if (newPassword !== confirmPassword) {
        e.preventDefault();
        alert('New passwords do not match!');
        return;
    }
    
    if (newPassword.length < 6) {
        e.preventDefault();
        alert('New password must be at least 6 characters long!');
        return;
    }
    
    if (!confirm('Are you sure you want to change your password?')) {
        e.preventDefault();
        return;
    }
});
</script>
{% endblock %}