#include <algorithm>
#include <cstring>
#include <map>
#include <string>

#include "level3_file_system_ce_test.h"

namespace wvoec3 {

std::map<std::string, std::string> OEMCrypto_Level3CETestFileSystem::files_;

ssize_t OEMCrypto_Level3CETestFileSystem::Read(const char* filename,
                                               void* buffer, size_t size) {
  if (!Exists(filename)) return 0;
  std::string data = files_[std::string(filename)];
  size_t bytes_read = std::min(size, data.size());
  memcpy(buffer, data.data(), bytes_read);
  return bytes_read;
}

ssize_t OEMCrypto_Level3CETestFileSystem::Write(const char* filename,
                                                const void* buffer,
                                                size_t size) {
  std::string data(static_cast<const char*>(buffer), size);
  files_[std::string(filename)] = data;
  return size;
}

bool OEMCrypto_Level3CETestFileSystem::Exists(const char* filename) {
  return files_.find(std::string(filename)) != files_.end();
}

ssize_t OEMCrypto_Level3CETestFileSystem::FileSize(const char* filename) {
  if (!Exists(filename)) return -1;
  return files_[std::string(filename)].size();
}

bool OEMCrypto_Level3CETestFileSystem::Remove(const char* filename) {
  if (!Exists(filename)) return false;
  files_.erase(std::string(filename));
  return true;
}

}  // namespace wvoec3