"""图形界面入口：``python -m recorder.gui``（或双击 启动录音机.bat）。

负责三件事：High-DPI 适配、深色主题样式表、以及缺依赖时的友好提示。
"""

from __future__ import annotations

import sys


QSS = """
* { font-family: "Microsoft YaHei UI", "Microsoft YaHei", "Segoe UI", sans-serif; }
QWidget { background: #0F1218; color: #E8ECF4; font-size: 12px; }
QMainWindow, QDialog { background: #0F1218; }
QMenuBar { background: #12161D; border-bottom: 1px solid #2A313D; }
QMenuBar::item { padding: 5px 12px; background: transparent; }
QMenuBar::item:selected { background: #1D222C; border-radius: 4px; }
QMenu { background: #161A22; border: 1px solid #2A313D; padding: 4px; }
QMenu::item { padding: 6px 22px; border-radius: 4px; }
QMenu::item:selected { background: #23303F; }
QGroupBox {
    background: #161A22;
    border: 1px solid #2A313D;
    border-radius: 8px;
    margin-top: 12px;
    padding-top: 8px;
    font-weight: 600;
}
QGroupBox::title {
    subcontrol-origin: margin;
    left: 12px;
    padding: 0 6px;
    color: #9FB0CB;
}
QFrame#card {
    background: #161A22;
    border: 1px solid #2A313D;
    border-radius: 10px;
}
QLabel { background: transparent; }
QPushButton {
    background: #232A36;
    border: 1px solid #323A48;
    border-radius: 6px;
    padding: 6px 12px;
    color: #E8ECF4;
}
QPushButton:hover { background: #2A3341; border-color: #3E4A5C; }
QPushButton:pressed { background: #1B2129; }
QPushButton:disabled { color: #5C6577; background: #1A1F27; border-color: #262D38; }
QComboBox, QLineEdit, QSpinBox, QDoubleSpinBox, QPlainTextEdit {
    background: #1B2029;
    border: 1px solid #2E3644;
    border-radius: 6px;
    padding: 5px 8px;
    selection-background-color: #2C5F9E;
}
QComboBox:hover, QLineEdit:hover, QSpinBox:hover, QDoubleSpinBox:hover {
    border-color: #3E4A5C;
}
QComboBox::drop-down { border: none; width: 18px; }
QComboBox QAbstractItemView {
    background: #1B2029;
    border: 1px solid #2E3644;
    selection-background-color: #23303F;
    outline: none;
}
QComboBox::down-arrow {
    image: none;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 5px solid #8B94A7;
    margin-right: 6px;
}
QCheckBox { spacing: 7px; }
QCheckBox::indicator {
    width: 15px; height: 15px;
    border: 1px solid #3A4352; border-radius: 4px;
    background: #1B2029;
}
QCheckBox::indicator:checked {
    background: #4EA1FF; border-color: #4EA1FF;
}
QSlider::groove:horizontal {
    height: 4px; background: #2A313D; border-radius: 2px;
}
QSlider::sub-page:horizontal { background: #4EA1FF; border-radius: 2px; }
QSlider::handle:horizontal {
    background: #E8ECF4; width: 14px; margin: -6px 0; border-radius: 7px;
}
QScrollArea { background: transparent; border: none; }
QScrollBar:vertical { background: #12161D; width: 10px; border-radius: 5px; }
QScrollBar::handle:vertical { background: #333B49; border-radius: 5px; min-height: 30px; }
QScrollBar::handle:vertical:hover { background: #414B5C; }
QScrollBar::add-line, QScrollBar::sub-line { height: 0; }
QStatusBar { background: #12161D; border-top: 1px solid #2A313D; color: #8B94A7; }
QStatusBar QLabel { color: #8B94A7; }
QSplitter::handle { background: transparent; width: 6px; }
QProgressBar {
    background: #1B2029; border: 1px solid #2E3644; border-radius: 6px;
    text-align: center; color: #E8ECF4; height: 16px;
}
QProgressBar::chunk { background: #4EA1FF; border-radius: 5px; }
QToolTip {
    background: #1B2029; color: #E8ECF4; border: 1px solid #3E4A5C;
    padding: 4px 6px; border-radius: 4px;
}
QTabBar::tab {
    background: #1B2029; padding: 6px 14px; border: 1px solid #2E3644;
    border-bottom: none; border-top-left-radius: 6px; border-top-right-radius: 6px;
}
QTabBar::tab:selected { background: #232A36; }
"""


def _check_dependencies() -> str | None:
    """返回缺失依赖的说明，全部就绪时返回 None。"""
    missing = []
    try:
        import numpy  # noqa: F401  (仅用于探测依赖是否就绪)
    except Exception:
        missing.append("numpy（数值运算）")
    try:
        import PyQt5  # noqa: F401  (仅用于探测依赖是否就绪)
    except Exception:
        missing.append("PyQt5（图形界面）")
    from . import engine
    if engine.sd is None:
        missing.append("sounddevice（PortAudio 音频后端）")
    if not missing:
        return None
    return ("缺少以下依赖，无法启动图形界面：\n\n  · " + "\n  · ".join(missing)
            + "\n\n请运行：python install_deps.py\n"
              "（在项目目录下执行，会把依赖装到项目内的 _vendor 目录）")


def run(argv: list[str] | None = None) -> int:
    argv = list(sys.argv if argv is None else argv)

    problem = _check_dependencies()
    if problem:
        print(problem, file=sys.stderr)
        try:
            from PyQt5.QtWidgets import QApplication as _QA, QMessageBox
        except Exception:
            return 2
        _app = _QA(argv)
        QMessageBox.critical(None, "缺少依赖", problem)
        return 2

    from PyQt5.QtCore import Qt
    from PyQt5.QtGui import QFont
    from PyQt5.QtWidgets import QApplication

    # High-DPI 相关属性必须在 QApplication 实例化之前设置
    QApplication.setAttribute(Qt.AA_EnableHighDpiScaling, True)
    QApplication.setAttribute(Qt.AA_UseHighDpiPixmaps, True)

    from .window import MainWindow

    app = QApplication(argv)
    app.setApplicationName("RecorderStudio")
    app.setOrganizationName("RecorderStudio")
    app.setStyleSheet(QSS)
    app.setFont(QFont("Microsoft YaHei UI", 9))

    win = MainWindow()
    win.show()
    return app.exec_()


if __name__ == "__main__":
    sys.exit(run())