#include "../../include/package.h"
#include "../../include/error.h"
#include "../../include/util.h"

#include <stdbool.h>
#include <stdlib.h>
#include <string.h>

bool __lm_package_extract_check(char *file){
  if(!exists(file, NULL) || !is_file(file)){
    lm_error_set(LM_ERR_PkgBadArchive);
    return false;
  }
  return true;
}

lm_pkg_files_t *lm_package_extract(lm_pkg_t *pkg, char *target){
  if(NULL == pkg || NULL == target){
    lm_error_set(LM_ERR_ArgNULL);
    return NULL;
  }

  if(lm_package_path_is_empty(pkg)){
    lm_error_set(LM_ERR_PkgPathsEmpty);
    return NULL;
  }

  if(!extract_archive(target, pkg->archive))
    return NULL;

  lm_pkg_files_t *files = malloc(sizeof(lm_pkg_files_t));
  bool ret = false;

  bzero(files, sizeof(lm_pkg_files_t));

  files->data_file = join_alloc(target, "DATA");
  files->hashes_file = join_alloc(target, "HASHES");
  files->changes_file = join_alloc(target, "CHANGES");
  files->install_file = join_alloc(target, "INSTALL");
  files->files_archive = join_alloc(target, "files.tar.gz");

  if(!__lm_package_extract_check(files->data_file) ||
     !__lm_package_extract_check(files->hashes_file) ||
     !__lm_package_extract_check(files->changes_file) ||
     !__lm_package_extract_check(files->files_archive)){
    goto end;
  }

  ret = true;
end:
  if(!ret){
    lm_package_extract_free(files);
    files = NULL;
  }
  return files;
}

void lm_package_extract_free(lm_pkg_files_t *files){
  if(NULL == files)
    return;

  free(files->data_file);
  free(files->hashes_file);
  free(files->changes_file);
  free(files->install_file);
  free(files->files_archive);

  bzero(files, sizeof(lm_pkg_files_t));
  free(files);
}