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

#include "save/save.h"
#include "util/string.h"
#include <stdio.h>
#include <sys/stat.h>
#include <errno.h>

errorret_t saveInitLinux(void) {
  stringCopy(SAVE.platform.savePath, SAVE_LINUX_PATH, SAVE_LINUX_PATH_MAX);

  if(mkdir(SAVE.platform.savePath, 0755) != 0 && errno != EEXIST) {
    errorThrow("Failed to create save directory: %s", SAVE.platform.savePath);
  }

  errorOk();
}

errorret_t saveDisposeLinux(void) {
  errorOk();
}

errorret_t saveLoadLinux(const uint8_t slot, savefile_t *file) {
  char_t path[SAVE_LINUX_PATH_MAX];
  snprintf(path, SAVE_LINUX_PATH_MAX, SAVE_LINUX_FILE_FORMAT,
    SAVE.platform.savePath, (uint32_t)slot
  );

  FILE *f = fopen(path, "rb");
  if(!f) {
    file->exists = false;
    errorOk();
  }

  size_t read = fread(file, sizeof(savefile_t), 1, f);
  fclose(f);

  if(read != 1) {
    file->exists = false;
    errorThrow("Failed to read save data for slot %u", (uint32_t)slot);
  }

  file->exists = true;
  errorOk();
}

errorret_t saveWriteLinux(const uint8_t slot, const savefile_t *file) {
  char_t path[SAVE_LINUX_PATH_MAX];
  snprintf(path, SAVE_LINUX_PATH_MAX, SAVE_LINUX_FILE_FORMAT,
    SAVE.platform.savePath, (uint32_t)slot
  );

  FILE *f = fopen(path, "wb");
  if(!f) {
    errorThrow("Failed to open save file for writing: slot %u", (uint32_t)slot);
  }

  size_t written = fwrite(file, sizeof(savefile_t), 1, f);
  fclose(f);

  if(written != 1) {
    errorThrow("Failed to write save data for slot %u", (uint32_t)slot);
  }

  errorOk();
}

errorret_t saveDeleteLinux(const uint8_t slot) {
  char_t path[SAVE_LINUX_PATH_MAX];
  snprintf(path, SAVE_LINUX_PATH_MAX, SAVE_LINUX_FILE_FORMAT,
    SAVE.platform.savePath, (uint32_t)slot
  );

  if(remove(path) != 0 && errno != ENOENT) {
    errorThrow("Failed to delete save file for slot %u", (uint32_t)slot);
  }

  errorOk();
}