# People's Video Editor: high quality, GPU accelerated mp4 editor
# Copyright (C) 2025 Roz K <roz@rozk.net>
#
# This file is part of People's Video Editor.
#
# People's 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.
#
# People's 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 People's Video Editor.
# If not, see <https://www.gnu.org/licenses/>.

#TODO: split channels

from shape import Vertex, Shape

from array import array

class Mesh:
    __slots__ = '_array', '_view', '_size'

    def __init__(self, shape):
        #TODO: cpp
        if shape.cutouts:
            raise NotImplementedError
        if shape.size > 4:
            raise NotImplementedError

        self._array = array(Vertex.Type, 2 * 3 * Vertex.Channels)
        self._view = memoryview(self._array)
        self._size = self.view.nbytes
        tl = shape[0]
        tr = shape[1]
        br = shape[2]
        bl = shape[3]
        self.set(0, 0, tl)
        self.set(0, 1, tr)
        self.set(0, 2, br)
        self.set(1, 0, br)
        self.set(1, 1, bl)
        self.set(1, 2, tl)

    def __del__(self):
        del self._view
        del self._array

    def set(self, triangle, index, vertex):
        index = (triangle * 3 + index) * Vertex.Channels
        self._view[index:(index + Vertex.Channels)] = vertex

    @property
    def size(self):
        return self._size

    @property
    def view(self):
        return self._view