"""ISO volume properties dialog (view + edit metadata)."""

# This file is part of ISO Scalpel.
# Copyright (C) 2025 Jeremy Anderson <info@dcos.net>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, see <https://www.gnu.org/licenses/>
# or write to the Free Software Foundation, Inc., 51 Franklin Street,
# Fifth Floor, Boston, MA  02110-1301 USA.

from __future__ import annotations

from PySide6.QtWidgets import (
    QDialog,
    QDialogButtonBox,
    QFormLayout,
    QGroupBox,
    QHBoxLayout,
    QLabel,
    QLineEdit,
    QPushButton,
    QVBoxLayout,
)

from ..iso_handler import IsoHandler
from ..iso_record import _human_size


class PropertiesDialog(QDialog):
    """Display and edit volume descriptors of the open image."""

    def __init__(self, handler: IsoHandler, parent=None):
        super().__init__(parent)
        self.setWindowTitle("ISO Properties")
        self.setMinimumWidth(520)
        self._handler = handler

        props = handler.get_properties()

        # --- editable identity --------------------------------------------
        id_group = QGroupBox("Volume Identity")
        f = QFormLayout(id_group)
        self.volume_label = QLineEdit(props.volume_label)
        self.volume_label.setMaxLength(32)
        f.addRow("Volume label:", self.volume_label)
        self.publisher = QLineEdit(props.publisher)
        f.addRow("Publisher:", self.publisher)
        self.preparer = QLineEdit(props.preparer)
        f.addRow("Data preparer:", self.preparer)
        self.application = QLineEdit(props.application)
        f.addRow("Application:", self.application)
        self.system_id = QLineEdit(props.system_id)
        f.addRow("System ID:", self.system_id)
        self.volume_set_id = QLineEdit(props.volume_set_id)
        f.addRow("Volume set ID:", self.volume_set_id)

        # --- read-only image info -----------------------------------------
        info_group = QGroupBox("Image Information")
        info = QFormLayout(info_group)
        info.addRow("File:", QLabel(handler.filename or "(unsaved)"))
        info.addRow("Image size:", QLabel(_human_size(props.total_size)))
        info.addRow("Block size:", QLabel(f"{props.block_size} bytes"))
        info.addRow("ISO9660 level:", QLabel(str(props.interchange_level)))
        info.addRow("Extensions:", QLabel(", ".join(props.extensions) or "(none)"))

        # --- buttons -------------------------------------------------------
        self.apply_label_btn = QPushButton("Apply Label")
        self.apply_label_btn.setToolTip(
            "Write the volume label back to the image (does not save to disk)")
        buttons = QDialogButtonBox(QDialogButtonBox.Close)
        buttons.rejected.connect(self.reject)
        buttons.accepted.connect(self.accept)
        self.apply_label_btn.clicked.connect(self._apply_label)

        bl = QHBoxLayout()
        bl.addWidget(self.apply_label_btn)
        bl.addStretch(1)
        bl.addWidget(buttons)

        layout = QVBoxLayout(self)
        layout.addWidget(id_group)
        layout.addWidget(info_group)
        layout.addStretch(1)
        layout.addLayout(bl)

    def _apply_label(self) -> None:
        self._handler.set_volume_label(self.volume_label.text())
        self.publisher.setEnabled(False)
        self.preparer.setEnabled(False)
        self.application.setEnabled(False)