#include <assert.h>
#include <stdio.h>
#include <sys/stat.h>

#include "mrk/lexer.h"
#include "mrk/parser.h"
#include "mrk/ast.h"

int main(int argc, char **argv) {
  if (argc == 1) {
    fprintf(stderr, "No file provided.");
    return 1;
  }

  struct stat stat_s;

  assert(stat(argv[1], &stat_s) == 0);

  char *buf = malloc(stat_s.st_size);
  assert(buf);

  long read = 0;

  FILE *f = fopen(argv[1], "rb");
  assert(f);

  while (read < stat_s.st_size) {
    read += fread(buf + read, 1, stat_s.st_size - read, f);
  }

  mrk_lexer *lexer;
  assert(mrk_lexer_init(&lexer) == mrk_err_ok);
  mrk_lexer_open(lexer, buf, stat_s.st_size);

  mrk_parser *parser;
  assert(mrk_parser_init(&parser) == mrk_err_ok);
  mrk_parser_open(parser, lexer);

  mrk_ast_node *root;
  mrk_err res = mrk_parser_parse(&root, parser);

  switch (res) {
    case mrk_err_ok:
      break;
    case mrk_err_invalid_md: {
      const char *err_msg = mrk_parser_err_msg(parser);
      printf("%s\n", err_msg);

      return 2;
     }
    default:
      printf("mrk error %i\n", res);
      return 3;
  }

  char *html;
  assert(mrk_ast_to_html(&html, buf, root) == mrk_err_ok);

  printf("%s\n", html);
}