"""
sn_basis/functions/dialog_wrapper.py – Benutzer-Dialoge (Qt5/6/Mock-kompatibel)
"""
from typing import Any
from typing import Literal, Optional
from sn_basis.functions.qt_wrapper import (
    QMessageBox, YES, NO, CANCEL, QT_VERSION, exec_dialog, ICON_QUESTION,
    QProgressDialog, QCoreApplication, Qt,
)

def ask_yes_no(
    title: str,
    message: str,
    default: bool = True,
    parent: Any = None,
) -> bool:
    """
    Stellt Ja/Nein-Frage. Funktioniert in PyQt5/6 UND Mock-Modus.
    """
    try:
        if QT_VERSION == 0:  # Mock-Modus
            print(f"🔍 Mock-Modus: ask_yes_no('{title}') → {default}")
            return default
        
        # ✅ KORREKT: Verwende YES/NO-Aliase aus qt_wrapper!
        buttons = YES | NO  
        default_button = YES if default else NO
        
        result = QMessageBox.question(
            parent, title, message, buttons, default_button
        )
        
        # ✅ int(result) == int(YES) funktioniert Qt5/6/Mock
        print(f"DEBUG ask_yes_no: result={result}, YES={YES}, match={int(result) == int(YES)}")
        return int(result) == int(YES)
        
    except Exception as e:
        print(f"⚠️ ask_yes_no Fehler: {e}")
        return default


OverwriteDecision = Optional[Literal["overwrite", "append", "cancel"]]


def ask_overwrite_append_cancel_custom(
    parent,
    title: str,
    message: str,
) -> Literal["overwrite", "append", "cancel"]:
    """Zeigt Dialog mit benutzerdefinierten Buttons: Überschreiben/Anhängen/Abbrechen.

    Parameters
    ----------
    parent :
        Eltern-Widget oder None.
    title : str
        Dialog-Titel.
    message : str
        Hauptmeldung mit Erklärung.

    Returns
    -------
    Literal["overwrite", "append", "cancel"]
        Genaue Entscheidung des Nutzers.
    """
    msg = QMessageBox(parent)
    msg.setIcon(ICON_QUESTION)
    msg.setWindowTitle(title)
    msg.setText(message)
    
    # Eigene Buttons mit exakten Texten
    overwrite_btn = msg.addButton("Überschreiben", QMessageBox.ButtonRole.AcceptRole)
    append_btn = msg.addButton("Anhängen", QMessageBox.ButtonRole.ActionRole)
    cancel_btn = msg.addButton("Abbrechen", QMessageBox.ButtonRole.RejectRole)
    
    exec_dialog(msg)
    
    clicked = msg.clickedButton()
    if clicked == overwrite_btn:
        return "overwrite"
    elif clicked == append_btn:
        return "append"
    else:  # cancel_btn
        return "cancel"


class ProgressDialog:
    def __init__(self, total: int, title: str = "Fortschritt", label: str = "Verarbeite..."):
        self.total = max(total, 1)
        self._canceled = False

        if QT_VERSION == 0:
            self.value = 0
            self.label = label
            self.title = title
            return

        self._dlg = QProgressDialog(label, "Abbrechen", 0, self.total)
        self._dlg.setWindowTitle(title)

        # Qt5 vs Qt6: WindowModality-Enum unterschiedlich verfügbar
        modality = None
        if hasattr(Qt, "WindowModality"):
            try:
                modality = Qt.WindowModality.WindowModal
            except Exception:
                modality = None
        if modality is None and hasattr(Qt, "WindowModal"):
            modality = Qt.WindowModal
        if modality is not None:
            try:
                self._dlg.setWindowModality(modality)
            except Exception:
                pass

        self._dlg.setMinimumDuration(0)
        self._dlg.setAutoClose(False)
        self._dlg.setAutoReset(False)
        self._dlg.setValue(0)

        def on_cancel():
            if self._dlg and self._dlg.value() >= self.total:
                # OK-Button am Ende
                self._dlg.close()
                return
            self._canceled = True
            self._dlg.close()

        try:
            self._dlg.canceled.connect(on_cancel)
        except Exception:
            pass

    def set_total(self, total: int) -> None:
        self.total = max(total, 1)
        if QT_VERSION == 0:
            return

        if self._dlg is not None:
            self._dlg.setMaximum(self.total)

    def set_value(self, value: int) -> None:
        if QT_VERSION == 0:
            self.value = value
            return

        if self._dlg is not None:
            self._dlg.setValue(min(value, self.total))
            if value >= self.total:
                self._dlg.setLabelText("Fertig. Klicken Sie auf OK, um das Fenster zu schließen.")
                self._dlg.setCancelButtonText("OK")
            QCoreApplication.processEvents()

    def set_label(self, text: str) -> None:
        if QT_VERSION == 0:
            self.label = text
            return

        if self._dlg is not None:
            self._dlg.setLabelText(text)
            QCoreApplication.processEvents()

    def is_canceled(self) -> bool:
        if QT_VERSION == 0:
            return self._canceled

        if self._dlg is not None:
            return self._canceled or self._dlg.wasCanceled()

        return self._canceled

    def close(self) -> None:
        if QT_VERSION == 0:
            return

        if self._dlg is not None:
            self._dlg.close()


def create_progress_dialog(total: int, title: str = "Fortschritt", label: str = "Verarbeite...") -> ProgressDialog:
    return ProgressDialog(total, title, label)