"""
 @file
 @brief This file contains the profiles model, used by the Profile dialog
 @author Jonathan Thomas <jonathan@openshot.org>

 @section LICENSE

 Copyright (c) 2008-2023 OpenShot Studios, LLC
 (http://www.openshotstudios.com). This file is part of
 OpenShot Video Editor (http://www.openshot.org), an open-source project
 dedicated to delivering high quality video editing and animation solutions
 to the world.

 OpenShot Video Editor 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 3 of the License, or
 (at your option) any later version.

 OpenShot Video Editor 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 OpenShot Library.  If not, see <http://www.gnu.org/licenses/>.
 """

from PyQt5.QtCore import Qt, QSortFilterProxyModel
from PyQt5.QtGui import QStandardItemModel, QStandardItem

from classes.logger import log
from classes.app import get_app


class ProfilesProxyModel(QSortFilterProxyModel):
    def __init__(self, parent=None):
        super().__init__(parent=parent)

    def filterAcceptsRow(self, sourceRow, sourceParent):
        """Filter for common transitions and text filter"""

        # Fetch the effect values
        profile_key = self.sourceModel().data(self.sourceModel().index(sourceRow, 0, sourceParent))
        profile_desc = self.sourceModel().data(self.sourceModel().index(sourceRow, 1, sourceParent))
        profile_dar = self.sourceModel().data(self.sourceModel().index(sourceRow, 5, sourceParent))

        # Return, if regExp match in displayed format.
        return self.filterRegExp().indexIn(profile_key.lower()) >= 0 or \
               self.filterRegExp().indexIn(profile_desc.lower()) >= 0 or \
               self.filterRegExp().indexIn(profile_dar) >= 0


class ProfilesStandardItemModel(QStandardItemModel):
    def __init__(self, parent=None):
        QStandardItemModel.__init__(self)


class ProfilesModel:

    def update_model(self, filter=None, clear=True):
        log.debug("updating profiles model.")
        app = get_app()
        _ = app._tr

        # Clear all items
        if clear:
            log.debug('cleared profiles model')
            self.model.clear()

        # Add Headers
        self.model.setHorizontalHeaderLabels([_("Key"), _("Description"), _("Width"), _("Height"),
                                              _("FPS"), _("DAR"), _("SAR")])

        for profile in self.profiles_list:

            if filter and not (
                filter.lower() in profile.info.description.lower()
                or filter.lower() in f'{profile.info.width}x{profile.info.height}'
                or filter.lower() in f'{profile.info.display_ratio.num}:{profile.info.display_ratio.den}'
            ):
                continue

            self._insert_row(profile)

    def update_or_insert_row(self, profile):
        """
        Updates an existing row if a profile with the same key exists,
        otherwise inserts a new row.
        """
        # Find if the profile already exists in the model by key
        existing_index = None
        for row in range(self.model.rowCount()):
            index = self.model.index(row, 0)  # Assuming key is in column 0
            if index.data(Qt.UserRole) is profile:
                existing_index = index
                break

        if existing_index:
            # Update existing row
            self._update_row(existing_index.row(), profile)
        else:
            # Insert new row
            self._insert_row(profile)

    def remove_row(self, profile):
        """
        Removes an existing row if a profile with the same key exists.
        """
        # Find if the profile already exists in the model by key
        for row in range(self.model.rowCount()):
            index = self.model.index(row, 0)  # Assuming key is in column 0
            if index.data(Qt.UserRole) is profile:
                # Remove the row from the model
                self.model.removeRow(row)
                break

    def _update_row(self, row, profile):
        """Update the data in an existing row."""
        self.model.setData(self.model.index(row, 0), profile.Key(), Qt.DisplayRole)
        self.model.setData(self.model.index(row, 0), profile, Qt.UserRole)

        self.model.setData(self.model.index(row, 1), profile.info.description, Qt.DisplayRole)
        self.model.setData(self.model.index(row, 2), profile.info.width, Qt.DisplayRole)
        self.model.setData(self.model.index(row, 3), profile.info.height, Qt.DisplayRole)

        fps_string = f"{(profile.info.fps.num / profile.info.fps.den):.2f}"
        if profile.info.fps.den == 1:
            fps_string = f"{int(profile.info.fps.num / profile.info.fps.den)}"
        self.model.setData(self.model.index(row, 4), fps_string, Qt.DisplayRole)

        self.model.setData(self.model.index(row, 5), f"{profile.info.display_ratio.num}:{profile.info.display_ratio.den}", Qt.DisplayRole)
        self.model.setData(self.model.index(row, 6), f"{profile.info.pixel_ratio.num}:{profile.info.pixel_ratio.den}", Qt.DisplayRole)

    def _insert_row(self, profile):
        """Insert a new row into the model."""
        row = []

        flags = Qt.ItemIsSelectable | Qt.ItemIsEnabled

        item = QStandardItem(f"{profile.Key()}")
        item.setData(profile, Qt.UserRole)
        row.append(item)

        item = QStandardItem(f"{profile.info.description}")
        item.setFlags(flags)
        row.append(item)

        item = QStandardItem(f"{profile.info.width}")
        item.setFlags(flags)
        row.append(item)

        item = QStandardItem(f"{profile.info.height}")
        item.setFlags(flags)
        row.append(item)

        fps_string = f"{(profile.info.fps.num / profile.info.fps.den):.2f}"
        if profile.info.fps.den == 1:
            fps_string = f"{int(profile.info.fps.num / profile.info.fps.den)}"

        item = QStandardItem(fps_string)
        item.setFlags(flags)
        row.append(item)

        item = QStandardItem(f"{profile.info.display_ratio.num}:{profile.info.display_ratio.den}")
        item.setFlags(flags)
        row.append(item)

        item = QStandardItem(f"{profile.info.pixel_ratio.num}:{profile.info.pixel_ratio.den}")
        item.setFlags(flags)
        row.append(item)

        self.model.appendRow(row)

    def __init__(self, profiles, *args):

        _ = get_app()._tr

        # Create standard model
        self.app = get_app()
        self.model = ProfilesStandardItemModel()
        self.model.setColumnCount(6)
        self.profiles_list = profiles

        # Create proxy model (for sorting and filtering)
        self.proxy_model = ProfilesProxyModel()
        self.proxy_model.setDynamicSortFilter(False)
        self.proxy_model.setFilterCaseSensitivity(Qt.CaseInsensitive)
        self.proxy_model.setSortCaseSensitivity(Qt.CaseSensitive)
        self.proxy_model.setSourceModel(self.model)
        self.proxy_model.setSortLocaleAware(True)
