#!/usr/bin/env bash

tmp_out="$(mktemp)"

if [ -f "${0%_test.c}.c" ]; then
	echo "THIS"
	SRC="${0%_test.c}.c"
else
	echo "THAT"
	SRC="$($(type -P basename) -- "${0%_test.c}.c")"
fi
grep -A9999 -- "[S]TART_OF_C_FILE" "${0}" | cc -Wall -Wextra -Werror -o "${tmp_out}" -xc "${SRC}" -

if [ ! "${?}" = "0" ] || [ ! -f "${tmp_out}" ]; then
  printf "\e[101;37m%s\e[m\n" "Could not compile"
  exit 1
fi

diff --expand-tabs --left-column --width="60" --side-by-side --label="Expected Output" --label="    Test Output" -- <("${tmp_out}" 2>&1 1>/dev/null) <("${tmp_out}" 2>/dev/null) && { printf "\e[102;30m%s\e[m\n" "All tests passed"; exit_status="0"; } || { printf "\e[101;37m%s\e[m\n" "At least one test failed"; exit_status="1"; }
rm -f -- "${tmp_out}"

exit -- "${exit_status}"
// START_OF_C_FILE
#include <stdio.h>
#include <unistd.h>

#define test(out_prefix, expected_string, func, ...) \
    do { \
        fprintf(stderr, "Case:%s:%s", out_prefix, expected_string); \
        fflush(stderr); \
        int old_stderr_fd = dup(2); \
        dup2(1, 2); \
        fprintf(stdout, "Case:%s:", out_prefix); \
        fflush(stdout); \
        func(__VA_ARGS__); \
        fflush(stdout); \
        dup2(old_stderr_fd, 2); \
    } while(0)

int ft_isalpha(int c);

int main(){
  test(    "'a'", "1\n", printf, "%d\n", ft_isalpha('a'));
  test(    "'A'", "1\n", printf, "%d\n", ft_isalpha('A'));
  test(    "'m'", "1\n", printf, "%d\n", ft_isalpha('m'));
  test(    "'M'", "1\n", printf, "%d\n", ft_isalpha('M'));
  test(    "'z'", "1\n", printf, "%d\n", ft_isalpha('z'));
  test(    "'Z'", "1\n", printf, "%d\n", ft_isalpha('Z'));
  test(      "0", "0\n", printf, "%d\n", ft_isalpha(0));
  test(      "1", "0\n", printf, "%d\n", ft_isalpha(1));
  test("'a' - 1", "0\n", printf, "%d\n", ft_isalpha('a' - 1));
  test("'A' - 1", "0\n", printf, "%d\n", ft_isalpha('A' - 1));
  test("'z' + 1", "0\n", printf, "%d\n", ft_isalpha('z' + 1));
  test("'Z' + 1", "0\n", printf, "%d\n", ft_isalpha('Z' + 1));
  return 0;
}