from __future__ import annotations

from app.qt_compat import QApplication, QColor, QFont, QPalette


def apply_dark_theme(app: QApplication) -> None:
    app.setStyle("Fusion")
    font = QFont(app.font())
    if font.pointSizeF() < 11.5:
        font.setPointSizeF(11.5)
    if hasattr(font, "setFamilies"):
        font.setFamilies(["Segoe UI Variable Text", "Segoe UI", "Bahnschrift"])
    else:
        font.setFamily("Segoe UI")
    app.setFont(font)

    palette = QPalette()
    palette.setColor(QPalette.Window, QColor("#1E1E1E"))
    palette.setColor(QPalette.WindowText, QColor("#CCCCCC"))
    palette.setColor(QPalette.Base, QColor("#252526"))
    palette.setColor(QPalette.AlternateBase, QColor("#2D2D30"))
    palette.setColor(QPalette.ToolTipBase, QColor("#252526"))
    palette.setColor(QPalette.ToolTipText, QColor("#CCCCCC"))
    palette.setColor(QPalette.Text, QColor("#CCCCCC"))
    palette.setColor(QPalette.Button, QColor("#2D2D30"))
    palette.setColor(QPalette.ButtonText, QColor("#CCCCCC"))
    palette.setColor(QPalette.Highlight, QColor("#007ACC"))
    palette.setColor(QPalette.HighlightedText, QColor("#FFFFFF"))
    palette.setColor(QPalette.BrightText, QColor("#FFFFFF"))
    palette.setColor(QPalette.PlaceholderText, QColor("#7A7A7A"))
    app.setPalette(palette)

    app.setStyleSheet(
        """
        QWidget {
          background: #1E1E1E;
          color: #CCCCCC;
        }
        QMainWindow, QDialog {
          background: #1E1E1E;
        }
        QToolBar {
          background: #2D2D30;
          border: none;
          border-bottom: 1px solid #3C3C3C;
          spacing: 4px;
          padding: 4px 6px;
        }
        QToolButton {
          background: transparent;
          color: #CCCCCC;
          border: 1px solid transparent;
          border-radius: 3px;
          padding: 6px 10px;
          margin: 0 1px;
        }
        QToolButton:hover {
          background: #37373D;
          border-color: #37373D;
        }
        QToolButton:pressed, QToolButton:checked {
          background: #094771;
          border-color: #007ACC;
          color: #FFFFFF;
        }
        QStatusBar {
          background: #007ACC;
          color: #FFFFFF;
        }
        QStatusBar QLabel {
          background: transparent;
          color: #FFFFFF;
          padding: 0 4px;
        }
        QWidget#sectionHeader {
          background: transparent;
          border: none;
        }
        QLabel#sectionHeaderLabel {
          background: transparent;
          color: #CCCCCC;
          font-size: 26px;
          font-weight: 600;
          padding: 0;
          margin: 0;
        }
        QWidget#sectionBody {
          background: #252526;
          border: 1px solid #3C3C3C;
          border-radius: 0;
        }
        QGroupBox {
          background: #252526;
          border: 1px solid #3C3C3C;
          border-radius: 0;
          margin-top: 30px;
          font-weight: 600;
          padding: 10px 12px 12px 12px;
        }
        QGroupBox::title {
          subcontrol-origin: margin;
          subcontrol-position: top left;
          top: 7px;
          left: 12px;
          background: transparent;
          padding: 0 0 0 0;
          color: #CCCCCC;
          font-size: 12px;
        }
        QLabel {
          background: transparent;
          border: none;
          padding: 0;
        }
        QPushButton, QComboBox, QLineEdit, QSpinBox, QDoubleSpinBox, QPlainTextEdit, QListWidget, QTableWidget {
          background: #1F1F1F;
          border: 1px solid #3C3C3C;
          border-radius: 3px;
          padding: 7px 10px;
          selection-background-color: #094771;
          selection-color: #FFFFFF;
        }
        QPushButton:hover, QComboBox:hover, QLineEdit:hover, QSpinBox:hover, QDoubleSpinBox:hover {
          border-color: #007ACC;
        }
        QPushButton {
          background: #2D2D30;
          min-height: 32px;
        }
        QPushButton:checked {
          background: #094771;
          color: #FFFFFF;
          border-color: #007ACC;
        }
        QComboBox::drop-down {
          border: none;
          width: 24px;
        }
        QListWidget::item {
          padding: 6px 8px;
          border-radius: 2px;
          margin: 1px 0;
        }
        QListWidget::item:selected {
          background: #094771;
          border: 1px solid #007ACC;
        }
        QHeaderView::section {
          background: #2D2D30;
          color: #CCCCCC;
          border: none;
          border-right: 1px solid #3C3C3C;
          padding: 6px 8px;
        }
        QTabWidget::pane {
          border: 1px solid #3C3C3C;
          border-radius: 0;
          top: -1px;
        }
        QTabBar::tab {
          background: #2D2D30;
          border: 1px solid #3C3C3C;
          border-bottom: none;
          padding: 8px 14px;
          margin-right: 2px;
          border-top-left-radius: 3px;
          border-top-right-radius: 3px;
        }
        QTabBar::tab:selected {
          background: #1E1E1E;
          color: #FFFFFF;
        }
        QScrollBar:vertical {
          background: #252526;
          width: 12px;
        }
        QScrollBar::handle:vertical {
          background: #424242;
          border-radius: 6px;
          min-height: 30px;
        }
        QScrollBar::handle:vertical:hover {
          background: #4F4F4F;
        }
        QSplitter::handle {
          background: #2D2D30;
        }
        """
    )