{% extends "base.html" %}

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

{% block content %}
<div class="min-h-screen flex items-center justify-center -mt-8">
    <div class="w-full max-w-md">
        <div class="card p-6 md:p-8">
            <h2 class="text-3xl font-bold mb-2 text-center">Sign In</h2>
            <p class="text-center text-slate-400 mb-6">Access your URL lists</p>
            
            <div id="errorMsg" class="hidden mb-4 alert alert-error"></div>
            <div id="successMsg" class="hidden mb-4 alert alert-success"></div>
            
            <form id="loginForm" class="space-y-4" novalidate>
                <div class="form-group">
                    <label for="email" class="form-label">Email Address</label>
                    <input 
                        type="email" 
                        name="email" 
                        id="email"
                        required 
                        class="form-input"
                        placeholder="you@example.com"
                        autocomplete="email"
                        maxlength="254"
                    >
                    <span id="emailError" class="text-xs text-red-400 mt-1 hidden"></span>
                </div>
                
                <div class="form-group">
                    <label for="password" class="form-label">Password</label>
                    <input 
                        type="password" 
                        name="password" 
                        id="password"
                        required 
                        class="form-input"
                        placeholder="••••••••"
                        autocomplete="current-password"
                        maxlength="128"
                    >
                    <span id="passwordError" class="text-xs text-red-400 mt-1 hidden"></span>
                </div>
                
                <div class="flex items-center">
                    <input 
                        type="checkbox" 
                        name="remember" 
                        id="remember"
                        class="w-4 h-4 bg-slate-700 border border-slate-600 rounded cursor-pointer"
                    >
                    <label for="remember" class="ml-2 text-sm text-slate-400 cursor-pointer">
                        Remember me
                    </label>
                </div>
                
                <button 
                    type="submit" 
                    class="btn-primary w-full mt-6"
                    id="submitBtn"
                >
                    Sign In
                </button>
            </form>
            
            <div class="mt-6 text-center">
                <p class="text-slate-400">
                    Don't have an account? 
                    <a href="{{ url_for('register') }}" class="text-sky-400 hover:text-sky-300 font-semibold transition-colors">
                        Sign up
                    </a>
                </p>
            </div>
        </div>
    </div>
</div>

<script>
document.addEventListener('DOMContentLoaded', () => {
    if (isAuthenticated()) {
        window.location.href = "{{ url_for('dashboard') }}";
    }
});

const loginForm = document.getElementById('loginForm');
const errorMsg = document.getElementById('errorMsg');
const successMsg = document.getElementById('successMsg');
const submitBtn = document.getElementById('submitBtn');

function showError(message) {
    errorMsg.textContent = message;
    errorMsg.classList.remove('hidden');
    successMsg.classList.add('hidden');
}

function showSuccess(message) {
    successMsg.textContent = message;
    successMsg.classList.remove('hidden');
    errorMsg.classList.add('hidden');
}

function clearMessages() {
    errorMsg.classList.add('hidden');
    successMsg.classList.add('hidden');
}

function validateEmail(email) {
    const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
    return emailRegex.test(email) && email.length <= 254;
}

function validateForm() {
    clearMessages();
    const email = document.getElementById('email').value.trim();
    const password = document.getElementById('password').value;
    const emailError = document.getElementById('emailError');
    const passwordError = document.getElementById('passwordError');
    
    let isValid = true;
    
    // Validate email
    if (!email) {
        emailError.textContent = 'Email is required';
        emailError.classList.remove('hidden');
        isValid = false;
    } else if (!validateEmail(email)) {
        emailError.textContent = 'Please enter a valid email address';
        emailError.classList.remove('hidden');
        isValid = false;
    } else {
        emailError.classList.add('hidden');
    }
    
    // Validate password
    if (!password) {
        passwordError.textContent = 'Password is required';
        passwordError.classList.remove('hidden');
        isValid = false;
    } else if (password.length < 8) {
        passwordError.textContent = 'Password must be at least 8 characters';
        passwordError.classList.remove('hidden');
        isValid = false;
    } else {
        passwordError.classList.add('hidden');
    }
    
    return isValid;
}

loginForm.addEventListener('submit', async (e) => {
    e.preventDefault();
    
    // Validate form
    if (!validateForm()) {
        showError('Please correct the errors above');
        return;
    }
    
    // Get form values
    const email = document.getElementById('email').value.trim().toLowerCase();
    const password = document.getElementById('password').value;
    const remember = document.getElementById('remember').checked;
    
    // Disable submit button
    submitBtn.disabled = true;
    submitBtn.textContent = 'Signing in...';
    
    try {
        // Use FormData for proper content-type
        const formData = new FormData();
        formData.append('username', email);  // FastAPI-users expects 'username'
        formData.append('password', password);
        
        const response = await fetch('/api/auth/jwt/login', {
            method: 'POST',
            body: formData
        });
        
        if (response.ok) {
            const data = await response.json();
            
            // Store token with proper key name
            localStorage.setItem('access_token', data.access_token);
            
            // Store remember me preference
            if (remember) {
                localStorage.setItem('rememberMe', 'true');
            } else {
                localStorage.removeItem('rememberMe');
            }
            
            showSuccess('Login successful! Redirecting...');
            
            // Redirect to dashboard
            setTimeout(() => {
                window.location.href = "{{ url_for('dashboard') }}";
            }, 500);
        } else {
            const error = await response.json();
            showError(error.detail || 'Login failed. Please check your credentials.');
            submitBtn.disabled = false;
            submitBtn.textContent = 'Sign In';
        }
    } catch (error) {
        console.error('Login error:', error);
        showError('An error occurred during login. Please try again.');
        submitBtn.disabled = false;
        submitBtn.textContent = 'Sign In';
    }
});

// Clear inline errors on input
document.getElementById('email').addEventListener('input', () => {
    document.getElementById('emailError').classList.add('hidden');
});

document.getElementById('password').addEventListener('input', () => {
    document.getElementById('passwordError').classList.add('hidden');
});
</script>
{% endblock %}