#pragma once

#include <iostream>
#include <source_location>
#include <string>

namespace error_handling {

inline void print_position(std::ostream &out,
                           std::pair<size_t, size_t> start_position,
                           std::pair<size_t, size_t> end_position) {
  out << '[' << start_position.first + 1 << ", " << start_position.second + 1
      << "] - [" << end_position.first + 1 << ", " << end_position.second + 1
      << ']';
}

inline void print_source_location(std::ostream &out,
                                  const std::source_location &location) {
  out << "\x1b[1;33mSOURCE LOCATION:\x1b[0m " << location.file_name() << "("
      << location.line() << ":" << location.column() << ") `"
      << location.function_name() << "`.\n";
}

inline void handle_general_error(std::string_view message) {
  std::cerr << "\x1b[1;31mGeneral Error:\x1b[0m " << message << ".\n";
  exit(1);
}

inline void
expect(bool condition, std::string_view failure_message,
       const std::source_location &location = std::source_location::current()) {

  if (!condition) {
    std::cerr << "\x1b[1;33mExpected condition failed (compiler error):\x1b[0m "
              << failure_message << ".\n";
    print_source_location(std::cerr, location);
    exit(1);
  }
}

inline void
ensure(bool condition, std::string_view failure_message,
       const std::source_location &location = std::source_location::current()) {

  if (!condition) {
    std::cerr << "\x1b[1;33mEnsured condition failed (compiler error):\x1b[0m "
              << failure_message << ".\n";
    print_source_location(std::cerr, location);
    exit(1);
  }
}

} // namespace error_handling

namespace utils {

// in std from c++23
[[noreturn]] inline void unreachable() {
  // Uses compiler specific extensions if possible.
  // Even if no extension is used, undefined behavior is still raised by
  // an empty function body and the noreturn attribute.
#if defined(_MSC_VER) && !defined(__clang__) // MSVC
  __assume(false);
#else // GCC, Clang
  __builtin_unreachable();
#endif
}

} // namespace utils