#!/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, QMessageBox

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=5) 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_background(key):
    """Verification en arriere-plan (thread)."""
    import threading
    def _bg():
        _check_license_online(key)
    t = threading.Thread(target=_bg, daemon=True)
    t.start()


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

    # Si on a un cache valide, lancer direct et verifier en arriere-plan
    if cache and cache.get("key"):
        key = cache["key"]
        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:
            # Cache encore valide — lancer l'app et verifier en background
            _check_license_background(key)
            return True

        # Cache expire — on doit verifier en ligne
        result, msg = _check_license_online(key)

        if result is True:
            return True

        if result is False:
            from app.license_dialog import LicenseMessageDialog
            LicenseMessageDialog("Licence invalide",
                f"Votre licence a ete refusee :\n{msg}\n\n"
                "Contactez CopyDev : contact@copydev.fr", "error").exec()
            return False

        # Hors-ligne et cache expire
        from app.license_dialog import LicenseMessageDialog
        LicenseMessageDialog("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", "error").exec()
        return False

    # Pas de cache — demander la cle de licence
    from app.license_dialog import LicenseDialog, LicenseMessageDialog
    dlg = LicenseDialog()
    if dlg.exec() != LicenseDialog.DialogCode.Accepted:
        return False

    key = dlg.get_key()
    if not key:
        return False

    result, msg = _check_license_online(key)

    if result is True:
        LicenseMessageDialog("Licence activee",
            f"Bienvenue, {msg} !\nVotre licence est activee.", "success").exec()
        return True

    if result is False:
        LicenseMessageDialog("Licence invalide",
            f"{msg}\n\nContactez CopyDev : contact@copydev.fr", "error").exec()
        return False

    # Hors-ligne a la premiere activation
    LicenseMessageDialog("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", "error").exec()
    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...")
    QApplication.processEvents()
    splash.hide()
    if not _check_license():
        sys.exit(1)
    splash.show()
    QApplication.processEvents()

    # Plus de verification de MAJ au demarrage — c'est dans Aide > Rechercher une MAJ

    splash.set_status("Chargement de l'interface...")
    from app.main_window import MainWindow
    window = MainWindow()

    # Gestion des arguments
    args = sys.argv[1:]
    action = None
    files_to_open = []
    i = 0
    while i < len(args):
        if args[i] == "--action" and i + 1 < len(args):
            action = args[i + 1]
            i += 2
        elif args[i].lower().endswith('.pdf') and os.path.exists(args[i]):
            files_to_open.append(args[i])
            i += 1
        else:
            i += 1

    if len(files_to_open) == 1:
        window._open_pdf(files_to_open[0])
    elif len(files_to_open) > 1:
        from pypdf import PdfWriter
        import tempfile as tf
        writer = PdfWriter()
        for f in files_to_open:
            writer.append(f)
        fd, merged = tf.mkstemp(suffix=".pdf")
        os.close(fd)
        with open(merged, "wb") as out:
            writer.write(out)
        window._open_pdf(merged)
        window._status_label.setText(f"{len(files_to_open)} fichiers fusionnes")

    # Actions en ligne de commande
    if action and files_to_open:
        from PyQt6.QtCore import QTimer
        def run_cli_action():
            from app.engine.booklet import create_booklet
            from app.engine.nup import nup_pages
            from app.engine.unbooklet import unbooklet
            import tempfile as tf
            fd, output = tf.mkstemp(suffix=".pdf")
            os.close(fd)
            src = files_to_open[0]
            try:
                if action == "booklet_a4":
                    create_booklet(src, output, binding="saddle_stitch", sheet_size=(841.89, 595.28))
                elif action == "booklet_a3":
                    create_booklet(src, output, binding="saddle_stitch", sheet_size=(1190.55, 841.89))
                elif action == "nup_2x2":
                    nup_pages(src, output, cols=2, rows=2, sheet_size=(841.89, 595.28))
                elif action == "unbooklet":
                    unbooklet(src, output)
                else:
                    return
                window._show_result(output)
                window._status_label.setText(f"Action '{action}' executee")
            except Exception as e:
                QMessageBox.critical(window, "Erreur", str(e))
        QTimer.singleShot(500, run_cli_action)

    window.show()
    splash.close()
    sys.exit(app.exec())


if __name__ == "__main__":
    main()