"""
qt_compat.py – Einheitliche Qt-Kompatibilitätsschicht für QGIS-Plugins.

Ziele:
- PyQt6 bevorzugt
- Fallback auf PyQt5
- Mock-Modus, wenn kein Qt verfügbar ist (z. B. in Unittests)
- OR-fähige Fake-Enums im Mock-Modus
"""

QT_VERSION = 0  # 0 = Mock, 5 = PyQt5, 6 = PyQt6

# ---------------------------------------------------------
# Versuch: PyQt6 importieren
# ---------------------------------------------------------
try:
    from PyQt6.QtWidgets import QMessageBox, QFileDialog
    from PyQt6.QtCore import Qt, QEventLoop, QUrl
    from PyQt6.QtNetwork import QNetworkRequest, QNetworkReply

    YES = QMessageBox.StandardButton.Yes
    NO = QMessageBox.StandardButton.No
    CANCEL = QMessageBox.StandardButton.Cancel
    ICON_QUESTION = QMessageBox.Icon.Question

    QT_VERSION = 6

    def exec_dialog(dialog):
        """Einheitliche Ausführung eines Dialogs."""
        return dialog.exec()

# ---------------------------------------------------------
# Versuch: PyQt5 importieren
# ---------------------------------------------------------
except Exception:
    try:
        from PyQt5.QtWidgets import QMessageBox, QFileDialog
        from PyQt5.QtCore import Qt, QEventLoop, QUrl
        from PyQt5.QtNetwork import QNetworkRequest, QNetworkReply

        YES = QMessageBox.Yes
        NO = QMessageBox.No
        CANCEL = QMessageBox.Cancel
        ICON_QUESTION = QMessageBox.Question

        QT_VERSION = 5

        def exec_dialog(dialog):
            return dialog.exec_()

    # ---------------------------------------------------------
    # Mock-Modus (kein Qt verfügbar)
    # ---------------------------------------------------------
    except Exception:
        QT_VERSION = 0

        class FakeEnum(int):
            """Ein OR-fähiger Enum-Ersatz für den Mock-Modus."""
            def __or__(self, other):
                return FakeEnum(int(self) | int(other))

        class QMessageBox:
            Yes = FakeEnum(1)
            No = FakeEnum(2)
            Cancel = FakeEnum(4)
            Question = FakeEnum(8)

        class QFileDialog:
            """Minimaler Mock für QFileDialog."""
            @staticmethod
            def getOpenFileName(*args, **kwargs):
                return ("", "")  # kein Dateipfad

        YES = QMessageBox.Yes
        NO = QMessageBox.No
        CANCEL = QMessageBox.Cancel
        ICON_QUESTION = QMessageBox.Question

        def exec_dialog(dialog):
            """Mock-Ausführung: gibt YES zurück, außer Tests patchen es."""
            return YES
        # -------------------------
        # Mock Netzwerk-Klassen
        # -------------------------
        class QEventLoop:
            def exec(self):
                return 0

            def quit(self):
                pass

        class QUrl(str):
            pass

        class QNetworkRequest:
            def __init__(self, url):
                self.url = url

        class QNetworkReply:
            def __init__(self):
                self._data = b""

            def readAll(self):
                return self._data

            def error(self):
                return 0

        def exec_dialog(dialog):
            return YES