from PySide6.QtWidgets import QGraphicsView, QGraphicsScene, QGraphicsPixmapItem, QApplication, QMainWindow, QWidget, QVBoxLayout, QSplitter, QStackedWidget, QPushButton, QLabel
from PySide6.QtGui import QPixmap, QWheelEvent, QPainter, QBrush, QColor
from PySide6.QtCore import Qt
import sys
from ui.widgets.placeholder_widget import PlaceholderWidget

class ZoomableImageView(QGraphicsView):
    def __init__(self, parent=None):
        super().__init__(parent)

        # Scena i element obrazu
        self._scene = QGraphicsScene(self)
        self.setScene(self._scene)
        self._scene.setBackgroundBrush(QBrush(QColor(20, 20, 20)))  # ciemne tło

        self._pixmap_item = QGraphicsPixmapItem()
        self._scene.addItem(self._pixmap_item)

        # Ustawienia widoku
        self.setDragMode(QGraphicsView.DragMode.ScrollHandDrag)  # przesuwanie myszą
        self.setRenderHint(QPainter.RenderHint.Antialiasing)
        self.setRenderHint(QPainter.RenderHint.SmoothPixmapTransform)

        # Wyłączenie suwaków
        self.setHorizontalScrollBarPolicy(Qt.ScrollBarPolicy.ScrollBarAlwaysOff)
        self.setVerticalScrollBarPolicy(Qt.ScrollBarPolicy.ScrollBarAlwaysOff)
        # Parametry zoomu
        self._zoom_factor = 1.25
        self._current_scale = 1.0

    def set_image(self, pixmap: QPixmap):
        # pixmap = QPixmap(image_path)
        self._pixmap_item.setPixmap(pixmap)
        self._scene.setSceneRect(pixmap.rect())
        # self.reset_transform()

    def reset_transform(self):
        """Resetuje skalowanie i ustawia 1:1"""
        self._current_scale = 1.0
        self.setTransform(self.transform().fromScale(1, 1))

    def wheelEvent(self, event: QWheelEvent):
        """Zoom kółkiem myszy"""
        if event.modifiers() & Qt.KeyboardModifier.ControlModifier:  # zoom tylko z CTRL
            if event.angleDelta().y() > 0:
                zoom = self._zoom_factor
            else:
                zoom = 1 / self._zoom_factor

            self._current_scale *= zoom
            self.scale(zoom, zoom)
        else:
            return
            super().wheelEvent(event)  # normalne przewijanie

class CameraPlaceholder(QWidget):
    def __init__(self, parent=None):
        super().__init__(parent)

        self.setAutoFillBackground(True)
        self.setStyleSheet("background-color: #141414;")

        layout = QVBoxLayout(self)
        layout.setSpacing(20)

        self.camera_start_btn = QPushButton("Start Camera")
        self.camera_start_btn.setFixedSize(200, 50)
        style_sheet = """
                        QPushButton {
                /* --- Styl podstawowy --- */
                background-color: transparent;
                border: 2px solid #CECECE; /* Grubość, styl i kolor obramowania */
                border-radius: 25px; /* Kluczowa właściwość do zaokrąglenia rogów! */
                color: #CECECE;
                padding: 10px 20px; /* Wewnętrzny margines */
                font-size: 16px;
            }

            QPushButton:hover {
                /* --- Styl po najechaniu myszką --- */
                color: #F0F0F0;
                border: 2px solid #F0F0F0;
            }

            QPushButton:pressed {
                /* --- Styl po naciśnięciu --- */
                background-color: #e0e0e0; /* Ciemniejsze tło w momencie kliknięcia */
                border: 2px solid #e0e0e0; /* Zmiana koloru ramki dla sygnalizacji akcji */
            }
        """
        self.camera_start_btn.setStyleSheet(style_sheet)

        self.info_label = QLabel("Kliknij, aby uruchomić kamerę")
        self.info_label.setStyleSheet("background-color: transparent; color: #CECECE; font-size: 18px;")
        self.info_label.setAlignment(Qt.AlignmentFlag.AlignCenter)

        layout.addStretch()
        layout.addWidget(self.camera_start_btn, alignment=Qt.AlignmentFlag.AlignCenter)
        layout.addWidget(self.info_label)
        layout.addStretch()
        self.setLayout(layout)

    def set_info_text(self, text: str):
        self.info_label.setText(text)

class SplitView(QSplitter):
    def __init__(self, parent=None):
        super().__init__(parent)
        print("Inicjalizacja SplitView2")
        self.setOrientation(Qt.Orientation.Vertical)

        self.widget_start = CameraPlaceholder()
        self.widget_live = ZoomableImageView()
        # self.widget_live = PlaceholderWidget("Camera View", "#750466")
        self.widget_ref = ZoomableImageView()
        # self.widget_ref = PlaceholderWidget("Image View", "#007981")

        self.stack = QStackedWidget()
        self.stack.addWidget(self.widget_start)
        self.stack.addWidget(self.widget_live)
        self.stack.setCurrentWidget(self.widget_start)

        self.addWidget(self.stack)
        self.addWidget(self.widget_ref)

        self.setSizes([self.height(), 0])

        pixmap = QPixmap("media/empty_guitar_h.jpg")
        # pixmap.fill(Qt.GlobalColor.lightGray)
        self.widget_live.set_image(pixmap)

    def toggle_orientation(self):
        if self.orientation() == Qt.Orientation.Vertical:
            self.setOrientation(Qt.Orientation.Horizontal)
            self.setSizes([self.width()//2, self.width()//2])
        else:
            self.setOrientation(Qt.Orientation.Vertical)
            self.setSizes([self.height()//2, self.height()//2])
    
    # def set_live_image(self, path_image: str):
    #     """Ustawienie obrazu na żywo"""
    #     pixmap = QPixmap(path_image)
    #     self.widget_live.set_image(pixmap)

    def set_live_image(self,  pixmap: QPixmap):
        """Ustawienie obrazu na żywo"""
        self.widget_live.set_image(pixmap)
        if self.stack.currentWidget() != self.widget_live:
            self.stack.setCurrentWidget(self.widget_live)

    def set_reference_image(self, path_image: str):
        """Ustawienie obrazu referencyjnego"""
        pixmap = QPixmap(path_image)
        self.widget_ref.set_image(pixmap)

    def toglle_live_view(self):
        """Przełączanie widoku na żywo"""
        if self.stack.currentWidget() == self.widget_start:
            self.stack.setCurrentWidget(self.widget_live)
        else:
            self.stack.setCurrentWidget(self.widget_start)