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

#
# Copyright 2012-2014 ComicTagger Authors
#
# 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.
from __future__ import annotations

import logging

from PyQt5 import QtCore, QtGui, QtWidgets, uic

from comicapi.comicarchive import ComicArchive
from comicapi.genericmetadata import GenericMetadata
from comictaggerlib.coverimagewidget import CoverImageWidget
from comictaggerlib.ui import ui_path

logger = logging.getLogger(__name__)


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

        with (ui_path / "pagebrowser.ui").open(encoding="utf-8") as uifile:
            uic.loadUi(uifile, self)

        self.pageWidget = CoverImageWidget(self.pageContainer, CoverImageWidget.ArchiveMode, None)
        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: ComicArchive | None = None
        self.page_count = 0
        self.current_page_num = 0
        self.metadata = metadata

        self.buttonBox.button(QtWidgets.QDialogButtonBox.StandardButton.Close).setDefault(True)
        self.btnPrev.setIcon(QtGui.QIcon(":/graphics/left.png"))
        self.btnNext.setIcon(QtGui.QIcon(":/graphics/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:
            selected_page_index = self.metadata.get_archive_page_index(self.current_page_num)
        else:
            selected_page_index = self.current_page_num

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