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/*
 * msg
 * Copyright (C) 2025  Raghuram Subramani <raghus2247@gmail.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#define _GNU_SOURCE

#include <limits.h>
#include <list.h>
#include <msg.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <util.h>

msg_t *msg;
bool stop = false;
bool regen = false;

void
signal_handler(int x)
{
  (void) x;
  stop = true;
}

void
usage(char *program)
{
  printf("Usage: %s [-h] [-r] [-v] [-o <output>] <directory>\n"
         "\t-h         : Help\n"
         "\t-v         : Verbose\n"
         "\t-r         : Regenerate every 500ms\n"
         "\t-o <output>: Output directory\n"
         "\t<directory>: Working directory\n",
         program);
}

void
config(void)
{
  printf("Base Directory: %s\n"
         "Output Directory: %s\n"
         "Verbose: %s\n"
         "Regenerating: %s\n\n",
         msg->base_directory,
         msg->output_directory,
         msg->verbose ? "true" : "false",
         regen ? "true" : "false");
}

int
main(int argc, char **argv)
{
  printf("msg: The Minimal Static Site Generator\n\n");

  int opt;
  msg = malloc(sizeof(msg_t));
  msg->base_directory = ".";
  msg->output_directory = "dist";
  msg->verbose = false;

  while ((opt = getopt(argc, argv, "o:hvr")) != -1) {
    switch (opt) {
    case 'o':
      msg->output_directory = optarg;
      break;
    case 'r':
      regen = true;
      break;
    case 'v':
      msg->verbose = true;
      break;
    case 'h':
    default:
      usage(argv[0]);
      return EXIT_SUCCESS;
    }
  }

  if (optind < argc)
    msg->base_directory = argv[optind];

  config();

  int r = run(true);
  if (!regen || r != EXIT_SUCCESS) {
    free(msg);
    return r;
  }

  signal(SIGINT, signal_handler);

  while (!stop) {
    printf(".");
    fflush(stdout);
    r = run(false);
    msleep(500);
  }

  free(msg);
  return r;
}