/**
 * Copyright (c) 2026 Dominic Masters
 * 
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */

#include "assetpalette.h"
#include "asset/assettype.h"
#include "assert/assert.h"

errorret_t assetPaletteLoad(assetentire_t entire) {
  assertNotNull(entire.data, "Data pointer cannot be NULL.");
  assertNotNull(entire.output, "Output pointer cannot be NULL.");

  assetpalette_t *assetData = (assetpalette_t *)entire.data;
  palette_t *palette = (palette_t *)entire.output;

  // Read header and version (first 4 bytes)
  if(
    assetData->header[0] != 'D' || 
    assetData->header[1] != 'P' ||
    assetData->header[2] != 'F'
  ) {
    errorThrow("Invalid palette header");
  }
  
  // Version (can only be 1 atm)
  if(assetData->version != 0x01) {
    errorThrow("Unsupported palette version");
  }

  // Check color count.
  if(
    assetData->colorCount == 0 || 
    assetData->colorCount > PALETTE_COLOR_COUNT_MAX
  ) {
    errorThrow("Invalid palette color count");
  }
  
  paletteInit(
    palette,
    assetData->colorCount,
    assetData->colors
  );
  errorOk();
}