#include <stdio.h>
#include <assert.h>
#include "pdf-tokeniser.h"
#include "pdf-error.h"

void print_token(pdf_token_t token)
{
  char *typ, *buf = NULL;
  int show_buf = 0, sz;
  switch(token->type)
    {
    case PDF_TOKEN_TYPE_WSPACE:
      typ = "WSPACE";
      break;
    case PDF_TOKEN_TYPE_COMMENT:
      typ = "COMMENT";
      show_buf = 1;
      break;
    case PDF_TOKEN_TYPE_KEYWORD:
      typ = "KEYWORD";
      show_buf = 1;
      break;
    case PDF_TOKEN_TYPE_INTEGER://TODO
      typ = "INTEGER";
      break;
    case PDF_TOKEN_TYPE_REAL://TODO
      typ = "REAL";
      break;
    case PDF_TOKEN_TYPE_NAME:
      typ = "NAME";
      show_buf = 1;
      break;
    case PDF_TOKEN_TYPE_STRING:
      typ = "STRING";
      show_buf = 1;
      break;
    case PDF_TOKEN_TYPE_DICT_START:
      typ = "DICT_START";
      break;
    case PDF_TOKEN_TYPE_DICT_END:
      typ = "DICT_END";
      break;
    case PDF_TOKEN_TYPE_ARRAY_START:
      typ = "ARRAY_START";
      break;
    case PDF_TOKEN_TYPE_ARRAY_END:
      typ = "ARRAY_END";
      break;
    case PDF_TOKEN_TYPE_PROC_START:
      typ = "PROC_START";
      break;
    case PDF_TOKEN_TYPE_PROC_END:
      typ = "PROC_END";
      break;
    default:
      typ = "(unknown)";
    }

  buf = show_buf ? (char*)token->value.buffer->data : "(no text)";
  sz = show_buf ? token->value.buffer->wp : -1;
  printf("token %s(%d): %s\n", typ, sz, buf);
};

void print_file(FILE *file)
{
  pdf_status_t rv;
  pdf_tokeniser_t tokeniser;
  pdf_stm_buffer_t buffer;
  pdf_token_t token;

  rv = pdf_tokeniser_new(&tokeniser);
  assert(rv == PDF_OK);
  buffer = pdf_stm_buffer_new(4096);
  assert(buffer);

  while (!feof(file))
    {
      buffer->rp = 0;
      buffer->wp = fread(buffer->data, 1, buffer->size, file);
      if (ferror(file))
        {
          perror("fread");
          break;
        }

      while (!pdf_stm_buffer_eob_p(buffer))
        {
          rv = read_token(tokeniser, buffer, &token, feof(file));
          if (rv == PDF_OK)
            print_token(token);
          else if (rv == PDF_ENINPUT || rv == PDF_EEOF)
            ;
          else
            {
              printf("read_token error %d\n", rv);
              goto out;
            }
        }
    }

out:
  printf("done\n");
}

int main(int argc, char **argv)
{
  print_file(stdin);
  return 0;
}