from PySide6.QtWidgets import QWidget, QLabel, QVBoxLayout, QHBoxLayout, QPushButton, QSizePolicy, QScrollArea
from PySide6.QtCore import Qt
from PySide6.QtGui import QFont


class SettingsRow(QPushButton):
    def __init__(self, title: str, subtitle: str):
        super().__init__()
        self.setObjectName("SettingsRow")
        self.setCursor(Qt.PointingHandCursor)
        self.setCheckable(False)
        self.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Fixed)
        self.setMinimumHeight(70)

        row = QHBoxLayout(self)
        row.setContentsMargins(16, 10, 16, 10)
        row.setSpacing(12)

        text_col = QVBoxLayout()
        text_col.setContentsMargins(0, 0, 0, 0)
        text_col.setSpacing(2)

        lbl_title = QLabel(title)
        lbl_title.setObjectName("SettingsRowTitle")
        lbl_title.setFont(QFont("", 16, 600))

        lbl_sub = QLabel(subtitle)
        lbl_sub.setObjectName("SettingsRowSub")
        lbl_sub.setFont(QFont("", 12))
        lbl_sub.setWordWrap(True)

        text_col.addWidget(lbl_title)
        text_col.addWidget(lbl_sub)

        chevron = QLabel("›")
        chevron.setObjectName("SettingsChevron")
        chevron.setFont(QFont("", 20, 600))
        chevron.setAlignment(Qt.AlignRight | Qt.AlignVCenter)

        row.addLayout(text_col)
        row.addStretch(1)
        row.addWidget(chevron)


class SettingsScreen(QWidget):
    def __init__(self):
        super().__init__()
        root = QVBoxLayout(self)
        root.setContentsMargins(18, 16, 18, 16)
        root.setSpacing(12)

        title = QLabel("Настройки")
        title.setFont(QFont("", 24, 700))
        root.addWidget(title)

        scroll = QScrollArea()
        scroll.setWidgetResizable(True)
        scroll.setFrameShape(QScrollArea.NoFrame)
        scroll.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)

        content = QWidget()
        content_layout = QVBoxLayout(content)
        content_layout.setContentsMargins(0, 0, 0, 0)
        content_layout.setSpacing(12)

        self._add_section(
            content_layout,
            "Сеть",
            [
                ("Wi-Fi", "Доступные сети и подключение"),
                ("Bluetooth", "Сопряжение и устройства"),
            ],
        )

        self._add_section(
            content_layout,
            "Система",
            [
                ("Об устройстве", "Версия, память, серийный номер"),
                ("Параметры разработчика", "Отладка и логирование"),
            ],
        )

        self._add_section(
            content_layout,
            "Дисплей и звук",
            [
                ("Экран", "Яркость, сон, тема"),
                ("Звук", "Громкость, эквалайзер"),
            ],
        )

        content_layout.addStretch(1)
        scroll.setWidget(content)
        root.addWidget(scroll, 1)

    def _add_section(self, root: QVBoxLayout, title: str, items: list[tuple[str, str]]):
        section = QLabel(title)
        section.setObjectName("SettingsSection")
        section.setFont(QFont("", 14, 700))
        section.setContentsMargins(2, 8, 2, 0)
        root.addWidget(section)

        for row_title, row_subtitle in items:
            root.addWidget(SettingsRow(row_title, row_subtitle))