#pragma once

#include <stdlib/quicksort.h>
#include <string.h>

template <typename T, bool reverse = false>
class Iterator {
public:
  T next() { return buffer[reverse ? pos-- : pos++]; }
  operator bool() const { return reverse ? (pos >= 0) : (pos < length); }

  explicit Iterator(T* b, size_t l) : buffer(b), length(l) {
    if (reverse)
      pos = length - 1;
  };

private:
  ssize_t pos = 0;
  T* const buffer;
  const size_t length;
};

class Console {
public:
  virtual void write(char c) = 0;
  virtual void write(ViewIterator& msg) = 0;
  virtual void update_cursor() = 0;

  static void set(Console* ptr);
  static Iterator<Console*> begin();
};

template <typename T>
void print_c(Console* c, const T& a) {
  if constexpr (is_same<T, char>()) {
    c->write(a);
  } else if constexpr (requires { StringView(a); }) {
    StringView v(a);
    auto iter = v.begin();
    c->write(iter);
  } else if constexpr (requires { IntegerView(a); }) {
    IntegerView v(a);
    auto iter = v.begin();
    c->write(iter);
  } else
    c->write(a);
}

template <typename T, typename... Args>
void print_c(Console* console, const T& a, const Args&... x) {
  print_c(console, a);
  print_c(console, x...);
}

template <typename T, typename... Args>
void printk(const T& a, const Args&... x) {
  auto iter = Console::begin();
  while (iter) {
    auto* c = iter.next();
    print_c(c, a, x...);
    c->update_cursor();
  }
}

extern "C" __attribute__((__noreturn__)) void abort();

#define runtime_assert(x, msg)                 \
  if (!x) {                                    \
    printk(__FILE__, ':', __LINE__, ' ', msg); \
    abort();                                   \
  }