"""
Rodchenko
Suprematist art auction
"""
from flask import Flask, render_template, request, redirect, url_for, session, flash
from dotenv import load_dotenv
import requests
import json
import os
import threading
import time
import logging

from utils.db import (
    authenticate_user,
    cleanup_expired_records,
    create_artwork_record,
    create_user,
    session_user,
    fetch_recent_artworks_for_user,
    get_artwork_owner_id,
    get_artwork_with_settings,
    check_connect,
    get_user_balance,
    get_user_profile,
    import_artwork_record,
    init_db,
    purchase_artwork,
    save_artwork_settings,
    search_artworks,
)
from utils.art import generate_suprematist_art, generate_artwork_title
from utils.security import load_artwork_settings, save_artwork_description, is_safe_url

app = Flask(__name__)
load_dotenv()
app.secret_key = os.environ.get("SECRET_KEY", "super_secret_key_123ZZZZZZZZZPWNEDBYKIDZZZ")
_cleaner_started = False

CLEANER_INTERVAL_SECONDS = 7 * 60
CLEANER_MAX_AGE_MINUTES = 7
logger = logging.getLogger("db-cleaner")
if not logger.handlers:
    handler = logging.StreamHandler()
    formatter = logging.Formatter(
        "%(asctime)s [%(levelname)s] %(name)s: %(message)s"
    )
    handler.setFormatter(formatter)
    logger.addHandler(handler)
logger.setLevel(logging.INFO)


def start_db_cleaner():
    global _cleaner_started
    if _cleaner_started:
        return
    _cleaner_started = True
    logger.info("Starting DB cleaner thread with interval=%ss window=%smin",
                CLEANER_INTERVAL_SECONDS, CLEANER_MAX_AGE_MINUTES)

    def _worker():
        while True:
            try:
                result = cleanup_expired_records(max_age_minutes=CLEANER_MAX_AGE_MINUTES)
                logger.info("DB cleanup run: %s", result)
            except Exception as exc:
                logger.exception("DB cleanup failed: %s", exc)
            time.sleep(CLEANER_INTERVAL_SECONDS)

    thread = threading.Thread(target=_worker, name="db-cleaner", daemon=True)
    thread.start()


init_db()
start_db_cleaner()

@app.route('/')
def index():
    if 'username' not in session:
        return redirect(url_for('login'))
    if session_user(session['username']):
        return redirect(url_for('login'))
    
    artworks = fetch_recent_artworks_for_user(session['user_id'])
    user_balance = get_user_balance(session['user_id'])
    
    return render_template('index.html', artworks=artworks, balance=user_balance)

@app.route('/login', methods=['GET', 'POST'])
def login():
    if request.method == 'POST':
        username = request.form['username']
        password = request.form['password']
        
        user = authenticate_user(username, password)

        if user:
            session['user_id'] = user["id"]
            session['username'] = user["username"]
            flash('Успешный вход!', 'success')
            return redirect(url_for('index'))
        else:
            flash('Неверные учетные данные!', 'error')
    
    return render_template('login.html')


@app.route('/register', methods=['GET', 'POST'])
def register():
    if request.method == 'POST':
        username = request.form['username']
        password = request.form['password']
        
        if not username or not password:
            flash('Заполните все поля!', 'error')
            return render_template('register.html')
        
        if len(username) < 3:
            flash('Имя пользователя должно быть не менее 3 символов!', 'error')
            return render_template('register.html')
        
        created, _ = create_user(username, password)
        if not created:
            flash('Пользователь с таким именем уже существует!', 'error')
            return render_template('register.html')
        
        flash('Регистрация успешна!', 'success')
        return redirect(url_for('login'))
    
    return render_template('register.html')


@app.route('/logout')
def logout():
    session.clear()
    flash('Вы вышли из системы', 'success')
    return redirect(url_for('login'))

@app.route('/create_artwork', methods=['POST'])
def create_artwork():
    if 'username' not in session:
        return redirect(url_for('login'))
    if session_user(session['username']):
        return redirect(url_for('login'))
    
    price = request.form.get('price', 100)
    description = request.form.get('description', '')
    is_private = 1 if request.form.get('is_private') else 0
    signature = request.form.get('signature', '')
    
    title = generate_artwork_title()
    art_data = generate_suprematist_art()
    
    settings_data = save_artwork_description(description) if description else None
    create_artwork_record(
        owner_id=session['user_id'],
        title=title,
        data=art_data,
        price=price,
        is_private=is_private,
        signature=signature,
        settings_data=settings_data,
    )
    if settings_data:
        _ = load_artwork_settings(settings_data)
    
    flash('Картина создана!', 'success')
    return redirect(url_for('index'))


@app.route('/buy/<int:artwork_id>')
def buy_artwork(artwork_id):
    if 'username' not in session:
        return redirect(url_for('login'))
    if session_user(session['username']):
        return redirect(url_for('login'))
    
    success, status = purchase_artwork(session['user_id'], artwork_id)

    if success:
        flash('Покупка успешна!', 'success')
    else:
        if status == "not_found":
            flash('Картина не найдена!', 'error')
        elif status == "same_owner":
            flash('Нельзя купить свою картину!', 'error')
        elif status == "insufficient":
            flash('Недостаточно средств!', 'error')
        else:
            flash('Не удалось завершить покупку.', 'error')
    return redirect(url_for('index'))


@app.route('/profile')
def profile():
    if 'username' not in session:
        return redirect(url_for('login'))
    if session_user(session['username']):
        return redirect(url_for('login'))
    
    user_id = session['user_id']
    user, artworks = get_user_profile(user_id)

    if not user:
        flash('Пользователь не найден', 'error')
        return redirect(url_for('logout'))
    
    return render_template('profile.html', user=user, artworks=artworks, balance=user['balance'])


@app.route('/artwork_settings/<int:artwork_id>')
def artwork_settings(artwork_id):
    if session_user(session['username']):
        return redirect(url_for('login'))
    
    artwork_data = get_artwork_with_settings(artwork_id)
    
    if not artwork_data:
        flash('Артворк не найден!', 'error')
        return redirect(url_for('index'))
    
    artwork, settings_data = artwork_data

    if artwork['owner_id'] != session['user_id']:
        flash('Нет доступа!', 'error')
        return redirect(url_for('index'))
    
    settings = None
    if settings_data:
        settings = load_artwork_settings(settings_data)
    
    balance = get_user_balance(session['user_id'])
    
    return render_template('artwork_settings.html', artwork=artwork, settings=settings, balance=balance)


@app.route('/update_settings', methods=['POST'])
def update_settings():
    if 'username' not in session:
        return redirect(url_for('login'))
    if session_user(session['username']):
        return redirect(url_for('login'))
    
    artwork_id = request.form.get('artwork_id')
    description = request.form.get('description', '')

    try:
        artwork_id_int = int(artwork_id)
    except (TypeError, ValueError):
        flash('Недостаточно прав!', 'error')
        return redirect(url_for('index'))

    owner_id = get_artwork_owner_id(artwork_id_int)

    if owner_id and owner_id == session['user_id']:
        if description:
            settings_data = save_artwork_description(description)
            
            save_artwork_settings(artwork_id_int, settings_data)
            
            _ = load_artwork_settings(settings_data)
            flash('Описание обновлено!', 'success')
        else:
            flash('Введите описание!', 'error')
    else:
        flash('Недостаточно прав!', 'error')
    
    return redirect(url_for('artwork_settings', artwork_id=artwork_id_int))

@app.route('/search')
def search():
    if 'username' not in session:
        return redirect(url_for('login'))
    if session_user(session['username']):
        return redirect(url_for('login'))
    
    query = request.args.get('q', '')
    
    balance = get_user_balance(session['user_id'])
    
    results = search_artworks(query) if query else []
    
    return render_template('search.html', results=results, query=query, balance=balance)

@app.route('/import_artwork', methods=['GET', 'POST'])
def import_artwork():
    if 'username' not in session:
        return redirect(url_for('login'))
    if session_user(session['username']):
        return redirect(url_for('login'))
    
    preview_content = None
    error = None
    success = None
    fetched_url = None
    balance = get_user_balance(session['user_id'])
    
    if request.method == 'POST':
        artwork_url = request.form.get('artwork_url', '').strip()
        
        if artwork_url:
            is_safe, result = is_safe_url(artwork_url)
            
            if not is_safe:
                error = f"Небезопасный URL: {result}"
            else:
                try:
                    resp = requests.get(
                        artwork_url, 
                        timeout=5,
                        allow_redirects=True,
                        headers={'User-Agent': 'Rodchenko-Gallery/1.0'}
                    )
                    
                    if resp.status_code == 200:
                        preview_content = resp.text[:10000]
                        fetched_url = resp.url
                        
                        try:
                            data = resp.json()
                            if isinstance(data, dict) and 'shapes' in data:
                                title = data.get('title', 'Импортированная композиция')
                                shapes_json = json.dumps(data['shapes'])
                                price = data.get('price', 100)
                                
                                import_artwork_record(
                                    owner_id=session['user_id'],
                                    title=title,
                                    shapes_json=shapes_json,
                                    price=price,
                                    signature=data.get('signature', ''),
                                )
                                success = f"Картина '{title}' успешно импортирована!"
                        except (json.JSONDecodeError, KeyError):
                            pass
                    else:
                        error = f"Сервер вернул статус {resp.status_code}"
                        
                except requests.exceptions.Timeout:
                    error = "Таймаут при загрузке"
                except requests.exceptions.RequestException as e:
                    error = f"Ошибка загрузки: {str(e)}"
    
    return render_template('import_artwork.html',
                          preview_content=preview_content,
                          error=error,
                          success=success,
                          fetched_url=fetched_url,
                          balance=balance)

@app.route('/healthcheck')
def healthcheck():
    return check_connect(request.remote_addr), 200