#!/usr/bin/env python3
"""Copydev Imposing Tool — Point d'entree."""

import sys
import os
import json
import time
import urllib.request
import urllib.error
import urllib.parse

# Support PyInstaller (chemin des resources)
if getattr(sys, 'frozen', False):
    BASE_DIR = os.path.dirname(sys.executable)
    BUNDLE_DIR = sys._MEIPASS
else:
    BASE_DIR = os.path.dirname(os.path.abspath(__file__))
    BUNDLE_DIR = BASE_DIR

sys.path.insert(0, BUNDLE_DIR)

from PyQt6.QtWidgets import QApplication, QInputDialog, QMessageBox, QLineEdit

import hashlib
import platform
import socket
import uuid

LICENSE_API = "https://vision.copydev.fr/api/license.php"
LICENSE_FILE = os.path.join(BASE_DIR, ".license")


def _get_machine_id():
    """Generer un identifiant unique pour cette machine."""
    raw = ""
    try:
        raw += platform.node()
        raw += str(uuid.getnode())  # MAC address
    except Exception:
        raw += "unknown"
    return hashlib.sha256(raw.encode()).hexdigest()[:32]


def _get_hostname():
    """Recuperer le nom NetBIOS / hostname."""
    try:
        return platform.node() or socket.gethostname()
    except Exception:
        return "inconnu"


def _load_license_cache():
    """Charger le cache de licence local."""
    if not os.path.exists(LICENSE_FILE):
        return None
    try:
        with open(LICENSE_FILE, "r") as f:
            return json.load(f)
    except Exception:
        return None


def _save_license_cache(data):
    """Sauvegarder le cache de licence local."""
    try:
        with open(LICENSE_FILE, "w") as f:
            json.dump(data, f)
    except Exception:
        pass


def _check_license_online(key):
    """Verifier la licence aupres du serveur Vision."""
    try:
        mid = _get_machine_id()
        hname = _get_hostname()
        url = f"{LICENSE_API}?key={urllib.parse.quote(key)}&machine_id={urllib.parse.quote(mid)}&hostname={urllib.parse.quote(hname)}"
        req = urllib.request.Request(url, headers={"User-Agent": "CopydevImposingTool/1.0"})
        with urllib.request.urlopen(req, timeout=10) as resp:
            data = json.loads(resp.read().decode())
            if data.get("valid"):
                cache = {
                    "key": key,
                    "client": data.get("client", ""),
                    "product": data.get("product", ""),
                    "offline_timeout_hours": data.get("offline_timeout_hours", 72),
                    "last_validated": time.time(),
                }
                _save_license_cache(cache)
                return True, data.get("client", "")
            return False, "Licence invalide"
    except urllib.error.HTTPError as e:
        try:
            body = json.loads(e.read().decode())
            return False, body.get("error", "Erreur serveur")
        except Exception:
            return False, f"Erreur HTTP {e.code}"
    except Exception as e:
        return None, str(e)  # None = hors-ligne


def _check_license():
    """Verifier la licence au lancement."""
    cache = _load_license_cache()

    # Si on a un cache, essayer de valider en ligne
    if cache and cache.get("key"):
        key = cache["key"]
        result, msg = _check_license_online(key)

        if result is True:
            # Licence valide en ligne
            return True

        if result is False:
            # Licence refusee par le serveur
            QMessageBox.critical(
                None, "Licence invalide",
                f"Votre licence a ete refusee :\n{msg}\n\n"
                "Contactez CopyDev : contact@copydev.fr"
            )
            return False

        # result is None = hors-ligne, verifier le timeout
        timeout_hours = cache.get("offline_timeout_hours", 72)
        last_validated = cache.get("last_validated", 0)
        elapsed_hours = (time.time() - last_validated) / 3600

        if elapsed_hours < timeout_hours:
            remaining = timeout_hours - elapsed_hours
            return True

        # Timeout depasse
        QMessageBox.critical(
            None, "Licence expiree hors-ligne",
            f"Impossible de verifier votre licence depuis {int(elapsed_hours)}h.\n"
            f"Le delai hors-ligne autorise est de {timeout_hours}h.\n\n"
            "Connectez-vous a internet ou contactez CopyDev :\n"
            "contact@copydev.fr"
        )
        return False

    # Pas de cache — demander la cle de licence
    key, ok = QInputDialog.getText(
        None,
        "Copydev Imposing Tool — Activation",
        "Entrez votre cle de licence :",
        QLineEdit.EchoMode.Normal,
    )
    if not ok or not key.strip():
        return False

    key = key.strip()
    result, msg = _check_license_online(key)

    if result is True:
        QMessageBox.information(
            None, "Licence activee",
            f"Bienvenue, {msg} !\nVotre licence est activee."
        )
        return True

    if result is False:
        QMessageBox.critical(
            None, "Licence invalide",
            f"{msg}\n\nContactez CopyDev : contact@copydev.fr"
        )
        return False

    # Hors-ligne a la premiere activation
    QMessageBox.critical(
        None, "Connexion requise",
        "Impossible de contacter le serveur de licences.\n"
        "Une connexion internet est necessaire pour la premiere activation.\n\n"
        "Contactez CopyDev : contact@copydev.fr"
    )
    return False


def main():
    app = QApplication(sys.argv)
    app.setApplicationName("Copydev Imposing Tool")
    app.setOrganizationName("Copydev")

    # Icone application
    from PyQt6.QtGui import QIcon
    icon_path = os.path.join(BUNDLE_DIR, "resources", "logo.png")
    if os.path.exists(icon_path):
        app.setWindowIcon(QIcon(icon_path))

    # Splash screen
    from app.splash import SplashScreen
    splash = SplashScreen()
    splash.show()
    QApplication.processEvents()

    splash.set_status("Verification de la licence...")
    if not _check_license():
        sys.exit(1)

    splash.set_status("Recherche de mises a jour...")
    # Verification de mise a jour silencieuse
    from app.updater import check_for_update, VERSION
    update_available, remote_version = check_for_update()
    if update_available:
        reply = QMessageBox.question(
            None, "Mise a jour disponible",
            f"Une nouvelle version est disponible : {remote_version}\n"
            f"(version actuelle : {VERSION})\n\n"
            "Voulez-vous mettre a jour maintenant ?",
            QMessageBox.StandardButton.Yes | QMessageBox.StandardButton.No
        )
        if reply == QMessageBox.StandardButton.Yes:
            from app.updater import do_update
            success, msg = do_update()
            if success:
                QMessageBox.information(None, "Mise a jour", f"{msg}\n\nL'application va redemarrer.")
                os.execv(sys.executable, [sys.executable] + sys.argv)
            else:
                QMessageBox.warning(None, "Mise a jour", f"Echec de la mise a jour :\n{msg}")

    splash.set_status("Chargement de l'interface...")
    from app.main_window import MainWindow
    window = MainWindow()
    window.show()
    splash.close()
    sys.exit(app.exec())


if __name__ == "__main__":
    main()