Add FFmpeg-based video integrity check

src/ui/qt_app.py

@@ -20,7 +20,7 @@ from PySide6.QtWidgets import (
     QApplication, QMainWindow, QWidget, QSplitter, QTreeWidget, QTreeWidgetItem,
     QTableWidget, QTableWidgetItem, QVBoxLayout, QHBoxLayout, QLabel, QLineEdit,
     QPushButton, QFileDialog, QMessageBox, QInputDialog, QDialog, QDialogButtonBox,
-    QHeaderView, QMenu, QAbstractItemView, QCheckBox, QComboBox,
+    QHeaderView, QMenu, QAbstractItemView, QCheckBox, QComboBox, QProgressDialog,
 )
 
 from src.core.file_manager import FileManager
@@ -518,6 +518,7 @@ class QtApp(QMainWindow):
 
         tests_menu = bar.addMenu("&Testy")
         self._add_action(tests_menu, "Kontrola konzistence dat…", self.check_consistency)
+        self._add_action(tests_menu, "Kontrola integrity videa…", self.check_video_integrity)
 
     def _add_action(self, menu: QMenu, text: str, slot, shortcut: str | None = None) -> QAction:
         action = QAction(text, self)
@@ -1130,6 +1131,89 @@ class QtApp(QMainWindow):
         box.setDetailedText("\n".join(detail))
         box.exec()
 
+    def check_video_integrity(self) -> None:
+        """Test: scan movies for corrupted / unreadable video data (FFmpeg)."""
+        if not self.filehandler.movies_dir:
+            QMessageBox.information(self, "Testy", "Nejprve nastavte pool.")
+            return
+
+        # Scope: selected movies, or the whole pool when nothing is selected.
+        files = self._selected_movies() or self.filehandler.filelist
+        if not files:
+            QMessageBox.information(self, "Kontrola integrity", "Pool je prázdný.")
+            return
+        scope = "vybrané filmy" if self._selected_movies() else "celý pool"
+
+        # Depth: deep = full decode (thorough, slow), quick = ffprobe (fast).
+        box = QMessageBox(self)
+        box.setIcon(QMessageBox.Question)
+        box.setWindowTitle("Kontrola integrity videa")
+        box.setText(
+            f"Zkontrolovat {scope} ({len(files)}).\n\n"
+            "Důkladná: plné dekódování přes ffmpeg — odhalí i poškozená data "
+            "uvnitř souboru, ale čte celý soubor (pomalé).\n"
+            "Rychlá: ffprobe — odhalí nečitelné/uříznuté soubory (rychlé)."
+        )
+        deep_btn = box.addButton("Důkladná", QMessageBox.AcceptRole)
+        quick_btn = box.addButton("Rychlá", QMessageBox.AcceptRole)
+        box.addButton("Zrušit", QMessageBox.RejectRole)
+        box.exec()
+        clicked = box.clickedButton()
+        if clicked not in (deep_btn, quick_btn):
+            return
+        deep = clicked is deep_btn
+
+        progress = QProgressDialog(
+            "Kontroluji integritu videa…", "Zrušit", 0, len(files), self)
+        progress.setWindowTitle("Kontrola integrity videa")
+        progress.setWindowModality(Qt.WindowModal)
+        progress.setMinimumDuration(0)
+
+        def on_progress(done: int, total: int, f: File) -> None:
+            progress.setValue(done)
+            progress.setLabelText(f"[{done}/{total}] {f.filename}")
+            QApplication.processEvents()
+
+        result = self.filehandler.scan_video_integrity(
+            files, deep=deep, on_progress=on_progress,
+            should_cancel=progress.wasCanceled)
+        progress.setValue(len(files))
+
+        if not result["ok"]:
+            QMessageBox.warning(self, "Kontrola integrity", result["error"])
+            return
+
+        problems = result["problems"]
+        checked = result["checked"]
+        suffix = " (zrušeno)" if result["cancelled"] else ""
+        if not problems:
+            QMessageBox.information(
+                self, "Kontrola integrity videa",
+                f"✅ Bez problémů — zkontrolováno {checked} souborů{suffix}.")
+            return
+
+        bad = [r for r in problems if r.checked]
+        unchecked = [r for r in problems if not r.checked]
+        detail: list[str] = []
+        if bad:
+            detail.append(f"■ Poškozené / vadné ({len(bad)}):")
+            detail += [f"    • {r.path.name} — {r.error}" for r in bad]
+            detail.append("")
+        if unchecked:
+            detail.append(f"■ Nešlo zkontrolovat ({len(unchecked)}):")
+            detail += [f"    • {r.path.name} — {r.error}" for r in unchecked]
+
+        msg = QMessageBox(self)
+        msg.setIcon(QMessageBox.Warning)
+        msg.setWindowTitle("Kontrola integrity — nalezeny problémy")
+        msg.setText(
+            f"Zkontrolováno: {checked}{suffix}\n"
+            f"Poškozené / vadné: {len(bad)}\n"
+            f"Nešlo zkontrolovat: {len(unchecked)}\n\n"
+            "Podrobnosti zobrazíš přes „Show Details…\".")
+        msg.setDetailedText("\n".join(detail))
+        msg.exec()
+
     def closeEvent(self, event) -> None:  # noqa: N802 — Qt override
         self.filehandler.global_config["window_geometry"] = f"{self.width()}x{self.height()}"
         from src.core.config import save_global_config