#include "arena_alloc.h"
#include "context.h"
#include "interp.h"
#include "mprintf.h"
#include "self.h"
#include "strbuf.h"
#include <arena.h>
#include <desc.h>
#include <filereader.h>
#include <filewriter.h>
#include <liballoc.h>
#include <list.h>
#include <minmax.h>
#include <path.h>
#include <printf.h>
#include <process.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <str_status.h>
#include <string.h>
#include <system.h>
#include <terminal_cursor.h>

#define LINE_BUFFER_MAX 1024
#define PROMPT          "$ "

static void exec_line (const char* line) {
  struct list_node_link* tokens = NULL;

  tokenize (&tokens, line);

  if (tokens != NULL)
    parse_and_execute (tokens);

  arena_reset (&arena);
}

void app_main (void) {
  e_pid = get_exec_pid ();
  e_pgid = get_procgroup (e_pid);

  size_t line_cursor = 0;
  char line_buffer[LINE_BUFFER_MAX + 1];
  memset (line_buffer, 0, sizeof (line_buffer));

  while (interp_is_running ()) {
    mprintf (PROMPT);

    char ch = 0;
    for (;;) {
      mail_receive (&ch, 1);

      if (ch == '\n')
        break;

      if (line_cursor < LINE_BUFFER_MAX) {
        line_buffer[line_cursor++] = ch;
        mprintf ("%c", ch);
      }
    }

    mprintf ("\n");
    exec_line (line_buffer);

    line_cursor = 0;
    memset (line_buffer, 0, sizeof (line_buffer));
  }

  arena_destroy (&arena);
}