"""A PyQT4 dialog to show pages of a comic archive"""

# Copyright 2012-2014 Anthony Beville

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at

#     http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import logging
import platform
from typing import Optional

from PyQt5 import QtCore, QtGui, QtWidgets, uic

from comicapi.comicarchive import ComicArchive
from comicapi.genericmetadata import GenericMetadata
from comictaggerlib.coverimagewidget import CoverImageWidget
from comictaggerlib.settings import ComicTaggerSettings

logger = logging.getLogger(__name__)


class PageBrowserWindow(QtWidgets.QDialog):
    def __init__(self, parent: QtWidgets.QWidget, metadata: GenericMetadata) -> None:
        super().__init__(parent)

        uic.loadUi(ComicTaggerSettings.get_ui_file("pagebrowser.ui"), self)

        self.pageWidget = CoverImageWidget(self.pageContainer, CoverImageWidget.ArchiveMode)
        gridlayout = QtWidgets.QGridLayout(self.pageContainer)
        gridlayout.addWidget(self.pageWidget)
        gridlayout.setContentsMargins(0, 0, 0, 0)
        self.pageWidget.showControls = False

        self.setWindowFlags(
            QtCore.Qt.WindowType(
                self.windowFlags()
                | QtCore.Qt.WindowType.WindowSystemMenuHint
                | QtCore.Qt.WindowType.WindowMaximizeButtonHint
            )
        )

        self.comic_archive: Optional[ComicArchive] = None
        self.page_count = 0
        self.current_page_num = 0
        self.metadata = metadata

        self.buttonBox.button(QtWidgets.QDialogButtonBox.StandardButton.Close).setDefault(True)
        if platform.system() == "Darwin":
            self.btnPrev.setText("<<")
            self.btnNext.setText(">>")
        else:
            self.btnPrev.setIcon(QtGui.QIcon(ComicTaggerSettings.get_graphic("left.png")))
            self.btnNext.setIcon(QtGui.QIcon(ComicTaggerSettings.get_graphic("right.png")))

        self.btnNext.clicked.connect(self.next_page)
        self.btnPrev.clicked.connect(self.prev_page)
        self.show()

        self.btnNext.setEnabled(False)
        self.btnPrev.setEnabled(False)

    def reset(self) -> None:
        self.comic_archive = None
        self.page_count = 0
        self.current_page_num = 0
        self.metadata = GenericMetadata()

        self.btnNext.setEnabled(False)
        self.btnPrev.setEnabled(False)
        self.pageWidget.clear()

    def set_comic_archive(self, ca: ComicArchive) -> None:

        self.comic_archive = ca
        self.page_count = ca.get_number_of_pages()
        self.current_page_num = 0
        self.pageWidget.set_archive(self.comic_archive)
        self.set_page()

        if self.page_count > 1:
            self.btnNext.setEnabled(True)
            self.btnPrev.setEnabled(True)

    def next_page(self) -> None:

        if self.current_page_num + 1 < self.page_count:
            self.current_page_num += 1
        else:
            self.current_page_num = 0
        self.set_page()

    def prev_page(self) -> None:

        if self.current_page_num - 1 >= 0:
            self.current_page_num -= 1
        else:
            self.current_page_num = self.page_count - 1
        self.set_page()

    def set_page(self) -> None:
        if not self.metadata.is_empty:
            archive_page_index = self.metadata.get_archive_page_index(self.current_page_num)
        else:
            archive_page_index = self.current_page_num

        self.pageWidget.set_page(archive_page_index)
        self.setWindowTitle(f"Page Browser - Page {self.current_page_num + 1} (of {self.page_count}) ")
