import sqlite3, uuid, random
import atexit
from datetime import datetime, timedelta
from flask import Flask, request, jsonify, render_template_string, session, redirect, send_from_directory
from apscheduler.schedulers.background import BackgroundScheduler
from helpers.send_email import send_gmail

app = Flask(__name__, static_folder='static', static_url_path='/static')
app.secret_key = "cheie_ultra_secreta_aquila"
DB_FILE = "data/aquila_forms.db"
ADMIN_EMAIL = "macamete.robert@gmail.com" 

# --- LOGICA BAZĂ DE DATE ---
def init_db():
    with sqlite3.connect(DB_FILE) as conn:
        cursor = conn.cursor()
        cursor.execute('''CREATE TABLE IF NOT EXISTS clients 
            (id TEXT PRIMARY KEY, 
             nume TEXT, 
             email_destinatie TEXT, 
             creat_la DATETIME,
             data_expirare DATETIME)''')
        cursor.execute('''CREATE TABLE IF NOT EXISTS otps (cod TEXT, expira_la DATETIME)''')
        conn.commit()

# --- RUTE ADMIN ---
@app.route('/admin')
def admin_home():
    if not session.get('logged_in'):
        return render_template_string(LOGIN_HTML)
    
    with sqlite3.connect(DB_FILE) as conn:
        conn.row_factory = sqlite3.Row
        clients = conn.execute("SELECT * FROM clients").fetchall()
    return render_template_string(DASHBOARD_HTML, clients=clients)

@app.route('/admin/login', methods=['POST'])
def do_login():
    email = request.form.get('email')
    if email == ADMIN_EMAIL:
        otp = str(random.randint(100000, 999999))
        expira = datetime.now() + timedelta(minutes=10)
        with sqlite3.connect(DB_FILE) as conn:
            conn.execute("INSERT INTO otps VALUES (?, ?)", (otp, expira))
        send_gmail(ADMIN_EMAIL, "Cod Acces Panou", f"Codul tau: <b>{otp}</b>")
        return render_template_string(VERIFY_HTML)
    return "Acces interzis", 403

@app.route('/admin/verify', methods=['POST'])
def do_verify():
    cod = request.form.get('cod')
    with sqlite3.connect(DB_FILE) as conn:
        res = conn.execute("SELECT * FROM otps WHERE cod=? AND expira_la > ?", (cod, datetime.now())).fetchone()
        if res:
            session['logged_in'] = True
            conn.execute("DELETE FROM otps") # Curățăm codurile folosite
            return redirect('/admin')
    return "Cod invalid", 401

@app.route('/admin/add', methods=['POST'])
def add_client():
    if not session.get('logged_in'): return "No", 401
    uid = str(uuid.uuid4())[:8]
    nume = request.form.get('nume')
    email = request.form.get('email')
    acum = datetime.now().isoformat()
    # Calculăm data de expirare (peste 365 zile)
    data_expirare = (datetime.now() + timedelta(days=365)).isoformat()
    
    with sqlite3.connect(DB_FILE) as conn:
        conn.execute("INSERT INTO clients VALUES (?, ?, ?, ?, ?)", 
                    (uid, nume, email, acum, data_expirare))
    return redirect('/admin')

@app.route('/admin/delete/<id>')
def delete_client(id):
    if not session.get('logged_in'): return "No", 401
    with sqlite3.connect(DB_FILE) as conn:
        conn.execute("DELETE FROM clients WHERE id=?", (id,))
    return redirect('/admin')

# --- ENDPOINT PUBLIC PENTRU SITE-URI ---
@app.route('/api/v1/send', methods=['POST'])
def public_api():
    cid = request.form.get('client_id')
    with sqlite3.connect(DB_FILE) as conn:
        conn.row_factory = sqlite3.Row
        client = conn.execute("SELECT * FROM clients WHERE id=?", (cid,)).fetchone()
    
    if client:
        body = f"Mesaj nou de la <b>{request.form.get('nume')}</b><br>Email: {request.form.get('email')}<br><br>{request.form.get('mesaj')}"
        send_gmail(client['email_destinatie'], f"Contact: {client['nume']}", body)
        return jsonify({"status": "ok"}), 200
    return jsonify({"status": "error"}), 404

# --- LOGICA DE VERIFICARE BILLING ---
def check_billing_reminders():
    print(f"[{datetime.now()}] Se verifică termenele de facturare...")
    
    # Calculăm data de peste fix 30 de zile (doar data, fără oră)
    tinta = (datetime.now() + timedelta(days=30)).strftime('%Y-%m-%d')
    
    try:
        with sqlite3.connect(DB_FILE) as conn:
            conn.row_factory = sqlite3.Row
            # Verificăm cine expiră în fereastra de 30 de zile
            query = "SELECT * FROM clients WHERE date(data_expirare) = ?"
            clienti = conn.execute(query, (tinta,)).fetchall()
            
            for client in clienti:
                subiect = f"💰 Facturare: {client['nume']}"
                corp = f"""
                <h3>Reminder Facturare</h3>
                <p>Clientul <b>{client['nume']}</b> are data de expirare pe <b>{client['data_expirare']}</b>.</p>
                <p>Trebuie emisă factura pentru reînnoire.</p>
                <br>
                <small>ID Intern: {client['id']}</small>
                """
                send_gmail(ADMIN_EMAIL, subiect, corp)
                print(f"Notificare trimisă pentru {client['nume']}")
                
    except Exception as e:
        print(f"Eroare la verificarea billing-ului: {e}")

# --- CONFIGURARE SCHEDULER ---
scheduler = BackgroundScheduler()
# Setează ora la care vrei să primești mail-ul (ex: ora 09:00 dimineața)
scheduler.add_job(func=check_billing_reminders, trigger="cron", hour=9, minute=0)
scheduler.start()

# Închide scheduler-ul când aplicația se oprește
atexit.register(lambda: scheduler.shutdown())

@app.route('/logo.png')
def serve_logo():
    return send_from_directory(app.static_folder, 'logo.png')

# --- TEMPLATE-URI HTML (Simplificate) ---
LOGIN_HTML = """
<!DOCTYPE html>
<html lang="ro">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <script src="https://cdn.tailwindcss.com"></script>
    <title>Login Admin - AquilaSoft</title>
</head>
<body class="bg-gray-100 h-screen flex items-center justify-center p-4">
    <div class="bg-white p-8 rounded-xl shadow-md w-full max-w-md">
        <h2 class="text-2xl font-bold mb-6 text-gray-800 text-center">Admin Access</h2>
        <form action="/admin/login" method="post" class="space-y-4">
            <div>
                <label class="block text-sm font-medium text-gray-700">Email Admin</label>
                <input type="email" name="email" required class="mt-1 w-full p-3 border rounded-lg focus:ring-2 focus:ring-blue-500 outline-none">
            </div>
            <button class="w-full bg-blue-600 hover:bg-blue-700 text-white font-bold py-3 rounded-lg transition">Trimite Cod</button>
        </form>
    </div>
</body>
</html>
"""

VERIFY_HTML = """
<!DOCTYPE html>
<html lang="ro">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <script src="https://cdn.tailwindcss.com"></script>
    <title>Verificare Cod - AquilaSoft</title>
</head>
<body class="bg-gray-100 h-screen flex items-center justify-center p-4">
    <div class="bg-white p-8 rounded-xl shadow-md w-full max-w-md">
        <h2 class="text-2xl font-bold mb-2 text-gray-800 text-center">Verificare Cod</h2>
        <p class="text-sm text-gray-600 mb-6 text-center">Introdu codul primit pe email.</p>
        <form action="/admin/verify" method="post" class="space-y-4">
            <input type="text" name="cod" placeholder="000000" required class="w-full p-4 border rounded-lg text-center text-2xl tracking-widest focus:ring-2 focus:ring-blue-500 outline-none">
            <button class="w-full bg-green-600 hover:bg-green-700 text-white font-bold py-3 rounded-lg transition">Verifică</button>
        </form>
    </div>
</body>
</html>
"""
DASHBOARD_HTML = """
<!DOCTYPE html>
<html lang="ro">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <script src="https://cdn.tailwindcss.com"></script>
    <title>Dashboard - AquilaSoft</title>
</head>
<body class="bg-gray-50 min-h-screen">
    <nav class="bg-blue-700 text-white p-3 shadow-lg">
        <div class="container mx-auto flex justify-between items-center">
            <div class="flex items-center gap-3">
                <img src="/logo.png" alt="Logo AquilaSoft" class="h-10 w-auto rounded">
                <h1 class="text-xl font-bold italic tracking-tight">Forms Management</h1>
            </div>
            
            <div class="flex items-center gap-2">
                <span class="text-xs text-blue-200">Admin</span>
                <a href="/admin" class="text-sm bg-blue-800 hover:bg-blue-900 px-4 py-2 rounded-lg transition">Refresh</a>
            </div>
        </div>
    </nav>

    <main class="container mx-auto p-4 md:p-8">
        <div class="bg-white p-6 rounded-xl shadow-sm mb-8 border border-gray-100">
            <h2 class="text-lg font-semibold mb-5 text-gray-700 flex items-center gap-2">
                <svg class="w-5 h-5 text-blue-500" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M18 9v3m0 0v3m0-3h3m-3 0h-3m-2-5a4 4 0 11-8 0 4 4 0 018 0zM3 20a6 6 0 0112 0v1H3v-1z"></path></svg>
                Adaugă Client Nou
            </h2>
            <form action="/admin/add" method="post" class="grid grid-cols-1 md:grid-cols-3 gap-4">
                <input name="nume" placeholder="Nume Client (ex: Avocat Popescu)" required class="p-3 border rounded-lg focus:ring-2 focus:ring-blue-200 outline-none transition">
                <input name="email" type="email" placeholder="Email Destinație Reînnoire" required class="p-3 border rounded-lg focus:ring-2 focus:ring-blue-200 outline-none transition">
                <button class="bg-blue-600 text-white font-bold py-3 rounded-lg hover:bg-blue-700 transition flex items-center justify-center gap-2">
                    <svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 4v16m8-8H4"></path></svg>
                    Creează Client
                </button>
            </form>
        </div>

        <div class="bg-white rounded-xl shadow-sm overflow-hidden border border-gray-100">
            <div class="p-5 border-b border-gray-100 bg-gray-50 flex justify-between items-center">
                <h3 class="font-semibold text-gray-800">Clienți Activi</h3>
                <span class="text-sm text-gray-500">{{ clients|length }} înregistrați</span>
            </div>
            
            <div class="overflow-x-auto">
                <table class="w-full text-left border-collapse">
                    <thead>
                        <tr class="bg-gray-100/50 text-gray-600 uppercase text-xs tracking-wider">
                            <th class="p-4 border-b">ID (client_id)</th>
                            <th class="p-4 border-b">Nume Site</th>
                            <th class="p-4 border-b">Email Notificări</th>
                            <th class="p-4 border-b">Expirare</th>
                            <th class="p-4 border-b text-center">Acțiuni</th>
                        </tr>
                    </thead>
                    <tbody class="text-gray-700">
                        {% for c in clients %}
                        <tr class="hover:bg-blue-50/50 transition border-b border-gray-100">
                            <td class="p-4"><code class="bg-blue-50 px-3 py-1 rounded-md text-blue-800 font-mono text-xs border border-blue-100">{{ c['id'] }}</code></td>
                            <td class="p-4 font-medium text-gray-900">{{ c['nume'] }}</td>
                            <td class="p-4 text-sm">{{ c['email_destinatie'] }}</td>
                            <td class="p-4 text-sm text-gray-600">{{ c['data_expirare'] }}</td>
                            <td class="p-4 text-center">
                                <a href="/admin/delete/{{ c['id'] }}" onclick="return confirm('Ești sigur că vrei să ștergi clientul {{ c['nume'] }}? Toate formularele lui vor înceta să funcționeze.')" class="text-red-500 hover:text-red-700 font-semibold text-sm bg-red-50 px-3 py-1 rounded-full hover:bg-red-100 transition">Şterge</a>
                            </td>
                        </tr>
                        {% endfor %}
                    </tbody>
                </table>
            </div>
            {% if not clients %}
            <div class="p-12 text-center text-gray-500 italic flex flex-col items-center gap-3">
                <svg class="w-12 h-12 text-gray-300" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M20 13V6a2 2 0 00-2-2H6a2 2 0 00-2 2v7m16 0v5a2 2 0 00-2 2H6a2 2 0 00-2 2v-5m16 0h-3m-3 0h-3m-3 0H4m0 0h3m-3 0h3m-3 0H4"></path></svg>
                Nu există clienți înregistrați. Adaugă primul client folosind formularul de mai sus.
            </div>
            {% endif %}
        </div>
        
        <footer class="mt-12 text-center text-xs text-gray-400 p-4">
            AquilaSoft Forms v1.0 | © 2026
        </footer>
    </main>
</body>
</html>
"""

if __name__ == '__main__':
    init_db()
    app.run(host='0.0.0.0', port=5000)