"""
删除确认对话框
"""
from PyQt5.QtWidgets import (
    QDialog, QVBoxLayout, QHBoxLayout, QLabel,
    QPushButton, QTextEdit, QCheckBox, QMessageBox
)
from PyQt5.QtCore import Qt
from PyQt5.QtGui import QFont, QColor

from utils import format_size


class DeleteConfirmDialog(QDialog):
    """删除确认对话框"""

    def __init__(
        self,
        paths: list,
        total_size: int,
        is_dir: bool = False,
        parent=None
    ):
        """
        初始化对话框

        参数:
            paths: 要删除的路径列表
            total_size: 总大小（字节）
            is_dir: 是否为目录
            parent: 父窗口
        """
        super().__init__(parent)
        self.paths = paths
        self.total_size = total_size
        self.is_dir = is_dir
        self.confirmed = False
        self.init_ui()

    def init_ui(self):
        """初始化界面"""
        self.setWindowTitle("确认删除")
        self.setMinimumSize(500, 350)
        self.setWindowFlags(self.windowFlags() & ~Qt.WindowContextHelpButtonHint)

        # 主布局
        layout = QVBoxLayout(self)
        layout.setSpacing(15)
        layout.setContentsMargins(20, 20, 20, 20)

        # 警告图标和标题
        header_layout = QHBoxLayout()

        icon_label = QLabel("⚠️")
        font = QFont()
        font.setPointSize(36)
        icon_label.setFont(font)
        header_layout.addWidget(icon_label)

        title_layout = QVBoxLayout()

        title_label = QLabel("确认删除")
        title_font = QFont()
        title_font.setPointSize(14)
        title_font.setBold(True)
        title_label.setFont(title_font)
        title_layout.addWidget(title_label)

        size_label = QLabel(f"将释放 {format_size(self.total_size)} 空间")
        size_label.setStyleSheet("color: green;")
        title_layout.addWidget(size_label)

        header_layout.addLayout(title_layout)
        header_layout.addStretch()

        layout.addLayout(header_layout)

        # 分隔线
        separator = QLabel()
        separator.setFrameStyle(QLabel.HLine | QLabel.Sunken)
        layout.addWidget(separator)

        # 删除内容列表
        content_label = QLabel("将删除以下内容：")
        layout.addWidget(content_label)

        self.content_text = QTextEdit()
        self.content_text.setReadOnly(True)
        self.content_text.setMaximumHeight(150)

        # 显示删除列表
        content = ""
        for path in self.paths[:50]:  # 最多显示 50 条
            content += f"• {path}\n"

        if len(self.paths) > 50:
            content += f"\n... 还有 {len(self.paths) - 50} 个项目"

        self.content_text.setPlainText(content)
        layout.addWidget(self.content_text)

        # 警告文本
        if self.is_dir:
            warning_label = QLabel(
                "⚠️ 目录将被递归删除，包含其中的所有文件和子目录！"
            )
            warning_label.setStyleSheet("color: red; font-weight: bold;")
            warning_label.setWordWrap(True)
            layout.addWidget(warning_label)

        # 确认复选框
        self.confirm_checkbox = QCheckBox("我已确认要删除以上内容")
        self.confirm_checkbox.stateChanged.connect(self.on_checkbox_changed)
        layout.addWidget(self.confirm_checkbox)

        # 按钮
        button_layout = QHBoxLayout()
        button_layout.addStretch()

        self.cancel_button = QPushButton("取消")
        self.cancel_button.clicked.connect(self.reject)
        button_layout.addWidget(self.cancel_button)

        self.delete_button = QPushButton("删除")
        self.delete_button.setEnabled(False)
        self.delete_button.setStyleSheet(
            "QPushButton:enabled { background-color: #e74c3c; color: white; }"
        )
        self.delete_button.clicked.connect(self.on_delete_clicked)
        button_layout.addWidget(self.delete_button)

        layout.addLayout(button_layout)

    def on_checkbox_changed(self, state):
        """复选框状态改变"""
        self.delete_button.setEnabled(state == Qt.Checked)

    def on_delete_clicked(self):
        """删除按钮点击"""
        if not self.confirm_checkbox.isChecked():
            return

        # 最终确认
        reply = QMessageBox.critical(
            self,
            "最终确认",
            f"确定要删除 {len(self.paths)} 个项目吗？\n"
            f"此操作不可撤销！",
            QMessageBox.Yes | QMessageBox.No,
            QMessageBox.No
        )

        if reply == QMessageBox.Yes:
            self.confirmed = True
            self.accept()

    def is_confirmed(self) -> bool:
        """是否确认删除"""
        return self.confirmed


class LogDeleteConfirmDialog(QDialog):
    """系统日志删除确认对话框"""

    def __init__(
        self,
        log_files: list,
        total_size: int,
        parent=None
    ):
        """
        初始化对话框

        参数:
            log_files: 日志文件列表
            total_size: 总大小（字节）
            parent: 父窗口
        """
        super().__init__(parent)
        self.log_files = log_files
        self.total_size = total_size
        self.confirmed = False
        self.init_ui()

    def init_ui(self):
        """初始化界面"""
        self.setWindowTitle("清理系统日志")
        self.setMinimumSize(500, 400)
        self.setWindowFlags(self.windowFlags() & ~Qt.WindowContextHelpButtonHint)

        # 主布局
        layout = QVBoxLayout(self)
        layout.setSpacing(15)
        layout.setContentsMargins(20, 20, 20, 20)

        # 标题
        header_layout = QHBoxLayout()

        icon_label = QLabel("📋")
        font = QFont()
        font.setPointSize(36)
        icon_label.setFont(font)
        header_layout.addWidget(icon_label)

        title_layout = QVBoxLayout()

        title_label = QLabel("清理系统日志")
        title_font = QFont()
        title_font.setPointSize(14)
        title_font.setBold(True)
        title_label.setFont(title_font)
        title_layout.addWidget(title_label)

        info_label = QLabel(
            f"检测到 /var/log 下有 {len(self.log_files)} 个日志文件，\n"
            f"共占用 {format_size(self.total_size)} 空间。"
        )
        title_layout.addWidget(info_label)

        header_layout.addLayout(title_layout)
        header_layout.addStretch()

        layout.addLayout(header_layout)

        # 分隔线
        separator = QLabel()
        separator.setFrameStyle(QLabel.HLine | QLabel.Sunken)
        layout.addWidget(separator)

        # 日志文件列表
        content_label = QLabel("将删除以下日志文件：")
        layout.addWidget(content_label)

        self.content_text = QTextEdit()
        self.content_text.setReadOnly(True)

        # 显示日志文件列表
        content = ""
        for log_file in self.log_files:
            name = log_file.name if hasattr(log_file, 'name') else str(log_file)
            size = format_size(log_file.size) if hasattr(log_file, 'size') else ""
            content += f"• {name} ({size})\n"

        self.content_text.setPlainText(content)
        layout.addWidget(self.content_text)

        # 说明文本
        note_label = QLabel(
            "💡 这些是 /var/log 目录下的日志文件（不包含子目录中的日志）。\n"
            "删除后系统会自动创建新的日志文件。"
        )
        note_label.setWordWrap(True)
        note_label.setStyleSheet("color: gray;")
        layout.addWidget(note_label)

        # 按钮
        button_layout = QHBoxLayout()
        button_layout.addStretch()

        self.cancel_button = QPushButton("取消")
        self.cancel_button.clicked.connect(self.reject)
        button_layout.addWidget(self.cancel_button)

        self.delete_button = QPushButton("清理日志")
        self.delete_button.setStyleSheet(
            "QPushButton { background-color: #3498db; color: white; }"
        )
        self.delete_button.clicked.connect(self.on_delete_clicked)
        button_layout.addWidget(self.delete_button)

        layout.addLayout(button_layout)

    def on_delete_clicked(self):
        """删除按钮点击"""
        reply = QMessageBox.question(
            self,
            "确认清理",
            f"确定要清理这 {len(self.log_files)} 个日志文件吗？\n"
            f"将释放 {format_size(self.total_size)} 空间。",
            QMessageBox.Yes | QMessageBox.No,
            QMessageBox.Yes
        )

        if reply == QMessageBox.Yes:
            self.confirmed = True
            self.accept()

    def is_confirmed(self) -> bool:
        """是否确认删除"""
        return self.confirmed