"""
═══════════════════════════════════════════════════════════════
  CORVO AI - Complete Teaching Platform
  Main Application Entry Point

  Run: python app.py
  Open: http://localhost:5000
═══════════════════════════════════════════════════════════════
"""

import os
from flask import Flask, redirect, url_for, session, flash, render_template, send_from_directory
from flask_socketio import SocketIO

from config import SECRET_KEY, DEBUG, HOST, PORT, REQUIRED_DIRS

# ─── Create Flask app ───
app = Flask(__name__)
app.secret_key = SECRET_KEY
socketio = SocketIO(app, cors_allowed_origins="*", async_mode='threading')

# ─── Create required directories ───
for d in REQUIRED_DIRS:
    os.makedirs(d, exist_ok=True)

# ─── Initialize databases ───
from database.users import init_users_db
from database.cards import init_cards_db
from database.chat_history import init_chat_history_db

init_users_db()
init_cards_db()
init_chat_history_db()

# ─── Initialize AI engines ───
from chat.agent import AIAgent
from board.engine import BoardEngine

agent = AIAgent()
board_engine = BoardEngine()

# ─── Register blueprints ───

# Auth
from auth.routes import auth_bp, init_auth_socketio
init_auth_socketio(socketio)
app.register_blueprint(auth_bp)

# Chat
from chat.routes import chat_bp, init_chat_agent
init_chat_agent(agent)
app.register_blueprint(chat_bp)

# Board
from board.routes import board_bp, init_board_engine
init_board_engine(board_engine)
app.register_blueprint(board_bp)

# Exam
from exam.routes import exam_bp
app.register_blueprint(exam_bp)

# Media
from media.routes import media_bp, init_media_agent
init_media_agent(agent)
app.register_blueprint(media_bp)

# Market
from market.routes import market_bp
app.register_blueprint(market_bp)

# WebSocket
from websocket.events import register_socketio_events
register_socketio_events(socketio)


# ═══════════════════════════════════════════════════════════════
#  ROOT ROUTES
# ═══════════════════════════════════════════════════════════════

from auth.helpers import is_session_valid
from database.users import load_users_db, get_user
from subjects.definitions import SUBJECTS, is_board_enabled


@app.route('/')
def index():
    if is_session_valid():
        return redirect(url_for('dashboard'))
    return redirect(url_for('auth.signup'))


@app.route('/dashboard')
def dashboard():
    if not is_session_valid():
        session.clear()
        flash('انتهت الجلسة، يرجى تسجيل الدخول مرة أخرى.', 'error')
        return redirect(url_for('auth.login'))

    username = session['username']
    users_db = load_users_db()
    user_data = users_db.get(username, {})

    student_type = user_data.get('student_type', 'علمي')
    all_subjects = SUBJECTS.get(student_type, [])
    purchased_subjects = user_data.get('purchased_subjects', ['islamic'])

    my_subjects = []
    for s in all_subjects:
        if s['id'] in purchased_subjects:
            subject_info = dict(s)
            subject_info['board_enabled'] = is_board_enabled(s['id'])
            my_subjects.append(subject_info)

    available_subjects = [s for s in all_subjects if s['id'] not in purchased_subjects]

    return render_template('dashboard.html',
                           username=username,
                           user_data=user_data,
                           my_subjects=my_subjects,
                           available_subjects=available_subjects,
                           balance=user_data.get('balance', 0))


@app.route('/static/<path:filename>')
def serve_static(filename):
    return send_from_directory('static', filename)


# ═══════════════════════════════════════════════════════════════
#  MAIN
# ═══════════════════════════════════════════════════════════════

if __name__ == '__main__':
    print("\n" + "═" * 60)
    print("  🎓 CORVO AI - Complete Teaching Platform")
    print("═" * 60)
    print()
    print("  📋 Architecture:")
    print("     ├── auth/        → Login, signup, sessions")
    print("     ├── chat/        → Text AI chat (multi-subject)")
    print("     ├── board/       → Interactive whiteboard (multi-subject)")
    print("     ├── exam/        → MCQ exam generation")
    print("     ├── media/       → Voice & image processing")
    print("     ├── market/      → Subject purchasing & cards")
    print("     ├── websocket/   → Real-time session management")
    print("     ├── database/    → JSON file persistence")
    print("     └── subjects/    → Subject definitions & loading")
    print()
    print("  🔧 FEATURES:")
    print("     ✅ Multi-subject support (chat + board)")
    print("     ✅ Per-user per-subject chat history")
    print("     ✅ Interactive whiteboard with TTS")
    print("     ✅ Board supports ANY subject dynamically")
    print("     ✅ <page>N</page> → per-subject book page images")
    print("     ✅ <svg>keyword</svg> → Icons8 hand-drawn icons")
    print("     ✅ MCQ exam generation per subject/chapter")
    print("     ✅ Voice input & image analysis")
    print("     ✅ Card-based balance & subject purchasing")
    print()
    print(f"  🌐 Open: http://localhost:{PORT}")
    print("═" * 60 + "\n")

    socketio.run(app, debug=DEBUG, host="0.0.0.0", port=7860, allow_unsafe_werkzeug=True)