from __future__ import annotations

from app.qt_compat import QLabel, QVBoxLayout, QWidget

from app.ui.preview_fullscreen import FullscreenPreviewWindow
from app.ui.preview_modes import PREVIEW_MODE_TILE, normalize_preview_mode
from app.ui.preview_widget import PreviewWidget


class ScenePreviewArea(QWidget):
    def __init__(self, controller, preview_mode: str = PREVIEW_MODE_TILE, parent: QWidget | None = None) -> None:
        super().__init__(parent)
        self.controller = controller
        self.preview_mode = normalize_preview_mode(preview_mode)

        self.fullscreen_preview = FullscreenPreviewWindow(self.controller, preview_mode=self.preview_mode, scene_role="live")

        layout = QVBoxLayout(self)
        layout.setContentsMargins(0, 12, 0, 0)
        layout.setSpacing(14)

        self.preview_title = QLabel("Preview")
        self.preview_title.setStyleSheet("font-size: 12px; font-weight: 600; color: #CCCCCC; padding: 0 0 6px 2px;")
        layout.addWidget(self.preview_title)

        self.single_preview_container = QWidget()
        single_layout = QVBoxLayout(self.single_preview_container)
        single_layout.setContentsMargins(0, 0, 0, 0)
        single_layout.setSpacing(0)
        self.preview_widget = PreviewWidget(self.controller, preview_mode=self.preview_mode, scene_role="live")
        self.preview_widget.tileClicked.connect(self.controller.set_selected_tile)
        single_layout.addWidget(self.preview_widget, 1)
        layout.addWidget(self.single_preview_container, 1)

        self.foh_preview_container = QWidget()
        foh_layout = QVBoxLayout(self.foh_preview_container)
        foh_layout.setContentsMargins(0, 0, 0, 0)
        foh_layout.setSpacing(12)

        self.live_preview_widget = PreviewWidget(self.controller, preview_mode=self.preview_mode, scene_role="live")
        self.live_preview_widget.tileClicked.connect(self.controller.set_selected_tile)
        live_panel, self.live_preview_label = self._build_scene_preview_panel("Live", self.live_preview_widget)
        foh_layout.addWidget(live_panel, 1)

        self.next_preview_widget = PreviewWidget(self.controller, preview_mode=self.preview_mode, scene_role="next")
        self.next_preview_widget.tileClicked.connect(self.controller.set_selected_tile)
        next_panel, self.next_preview_label = self._build_scene_preview_panel("Next", self.next_preview_widget)
        foh_layout.addWidget(next_panel, 1)

        layout.addWidget(self.foh_preview_container, 1)

    def set_preview_mode(self, mode: str) -> None:
        self.preview_mode = normalize_preview_mode(mode)
        self.preview_widget.set_preview_mode(self.preview_mode)
        self.live_preview_widget.set_preview_mode(self.preview_mode)
        self.next_preview_widget.set_preview_mode(self.preview_mode)
        self.fullscreen_preview.set_preview_mode(self.preview_mode)

    def set_foh_mode(self, enabled: bool) -> None:
        self.single_preview_container.setVisible(not enabled)
        self.foh_preview_container.setVisible(enabled)

    def set_scene_labels(self, live_label: str, next_label: str) -> None:
        self.live_preview_label.setText(live_label)
        self.next_preview_label.setText(next_label)

    def toggle_fullscreen(self) -> None:
        if self.fullscreen_preview.isVisible():
            self.fullscreen_preview.hide()
        else:
            self.fullscreen_preview.showFullScreen()

    def _build_scene_preview_panel(self, title: str, preview_widget: PreviewWidget) -> tuple[QWidget, QLabel]:
        panel = QWidget()
        layout = QVBoxLayout(panel)
        layout.setContentsMargins(0, 0, 0, 0)
        layout.setSpacing(6)

        title_label = QLabel(title)
        title_label.setStyleSheet("font-size: 13px; font-weight: 600; color: #E6E6E6; padding-left: 2px;")
        layout.addWidget(title_label)

        preview_widget.setMinimumHeight(220)
        layout.addWidget(preview_widget, 1)
        return panel, title_label