/*
 * libmedia update box position size
 *
 * 版权所有 (C) 2024 赵高兴
 * Copyright (C) 2024 Gaoxing Zhao
 *
 * 此文件是 libmedia 的一部分
 * This file is part of libmedia.
 * 
 * libmedia 是自由软件；您可以根据 GNU Lesser General Public License（GNU LGPL）3.1
 * 或任何其更新的版本条款重新分发或修改它
 * libmedia is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3.1 of the License, or (at your option) any later version.
 * 
 * libmedia 希望能够为您提供帮助，但不提供任何明示或暗示的担保，包括但不限于适销性或特定用途的保证
 * 您应自行承担使用 libmedia 的风险，并且需要遵守 GNU Lesser General Public License 中的条款和条件。
 * libmedia 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
 * Lesser General Public License for more details.
 *
 */

import type { BoxsPositionSizeInfo, IsobmffContext } from '../type'
import { array } from '@libmedia/common'
import { type IOWriterSync } from '@libmedia/common/io'

export default function updatePositionSize(ioWriter: IOWriterSync, isobmffContext: IsobmffContext) {
  const pos = ioWriter.getPos()
  const pointer = ioWriter.getPointer()
  const minPos = pos - static_cast<int64>(pointer)

  const seeks: BoxsPositionSizeInfo[] = []

  array.each(isobmffContext.boxsPositionInfo, (item) => {
    if (item.pos < pos && item.pos >= minPos) {
      ioWriter.seekInline(pointer + Number(item.pos - pos))
      ioWriter.writeUint32(item.size)
    }
    else {
      seeks.push(item)
    }
  })

  ioWriter.seekInline(pointer)

  if (seeks.length) {
    array.each(seeks, (item) => {
      ioWriter.seek(item.pos)
      ioWriter.writeUint32(item.size)
    })
    ioWriter.seek(pos)
  }

  isobmffContext.boxsPositionInfo = []
}