/* actions.c - ck actions ----------------------------------------------*- C -*-
 *
 * This file is part of ck, the config keeper
 *
 * -----------------------------------------------------------------------------
 *
 * Copyright (C) 2018  Anastasis Grammenos
 * GPLv3 (see LICENCE for the full notice)
 *
 * -------------------------------------------------------------------------- */
#include <limits.h>
#include <stdlib.h>

#include "actions.h"
#include "actionhelper.h"
#include "dblayer.h"
#include "ckutil.h"
#include "cklist.h"
#include "ckerrlog.h"

ERRLOG(action);

int run_INIT(UserOpt * opt, Conf *conf) {
  UNUSED(conf);
  if (db_exists(opt)) {
    ERR("ck is already initialized in %s", opt->confDir);
    return -1;
  }
  if (init_create_config_file(opt)) {
    HELP("Cound not create config file.");
    return -2;
  }
  DB db = init_make_DB(opt);
  if (db.error == SQL_NO_ERR) {
    init_make_tables(&db);
  }
  sqlite3_close(db.ptr);
  return 0;
}

int run_ADD(UserOpt * opt, Conf *conf) {
  DB db = open_DB(opt);
  if (db.ptr == NULL) {
    if (db.error == SQL_ERR_NO_TABLES) {
      ERR("The database file is currupted. Run ck init anew.");
    }
    goto error;
  }
  AddOpt addOpt = add_make_options(opt->args);
  switch (addOpt.err) {
  case ADD_NO_ERR:
    break;
  case ADD_ERR_WRONG_CONFIG:
    ERR("The config file specified doesn't exist or is a link.");
    goto error;
  case ADD_ERR_WRONG_FLAGS:
    ERR("Flags are: -s for secret and -p for primary.");
    goto error;
  }
  add_print_opts(&addOpt);
  /* Try adding the new config to the DB */
  if (add_transaction_try(&db, &addOpt)) {
    goto error;
  }
  add_make_link(&addOpt, conf);
  char err[STR_M];
  if (add_err_message(err)) {
    PRINT_ERR(err);
  error:
    close_DB(&db);
    return 1;
  }
  close_DB(&db);
  return 0;
}

int run_DEL(UserOpt * opt, Conf *conf) {
  DB db = open_DB(opt);
  if (db.ptr == NULL) {
    if (db.error == SQL_ERR_NO_TABLES) {
      ERR("The database file is currupted. Run ck init anew.");
    }
    goto error;
  }

  DelOpt delOpt = del_make_options(opt->args);
  switch(delOpt.err) {
  case DEL_NO_ERR:
    del_transaction_try(&db, delOpt.arg, delOpt.isConf);
    close_DB(&db);
    return 0;
  case DEL_ERR_WRONG_ARGS:
    ERR("Wrong delete arguments.");
    break;
  case DEL_ERR_WRONG_PATH:
    ERR("Path %s doesnt exist.", delOpt.arg);
  }
 error:
  close_DB(&db);
  return 1;
}

int run_EDIT(UserOpt *opt, Conf *conf) {
  DB db = open_DB(opt);
  if (db.ptr == NULL) {
    if (db.error == SQL_ERR_NO_TABLES) {
      ERR("The database file is currupted. Run ck init anew.");
    }
    return 1;
  }

  list_rewind(opt->args);
  char confPath[STR_L];
  char confName[STR_M];
  int secret = 0;
  /* Since we are here, args have to be 1 or 2 */
  char *pName = list_get(opt->args);
  if (!program_exists(&db, pName)) {
    ERR("Program %s doesn't exist in the database.", pName);
    goto error;
  }
  /* If there is no next argument */
  if (!list_next(opt->args)) {
    /* If there is no primary config*/
    if (edit_get_prime_config_from_program(&db, pName, confName, &secret) == -1) {
      /* If the program has only one config */
      if (get_config_number(&db, pName) == 1) {
        if (edit_get_config(&db, pName, confName, NULL, &secret)) {
          ERR("Coudln't find config file for %s", pName);
          goto error;
        }
      }
      /* If the program has many configs */
      else {
        HELP("Ambiguous config. Please type the config name after the program.");
        edit_print_suggested_configs(&db, pName);
        goto error;
      }
    }
  }
  /* If there are more arguments */
  else {
    char *cName = list_get(opt->args);
    if (edit_get_config(&db, pName, confName, cName, &secret)) {
      ERR("Program %s doesn't have a config named %s", pName, cName);
      edit_print_suggested_configs(&db, pName);
      goto error;
    }
  }
  close_DB(&db);
  str_join_dirname_with_basename(confPath, secret ? conf->scrt_dir : conf->vc_dir, confName);
  HELP("Editing %s", confPath);
    
  char *editor = getenv("EDITOR");
  char command[STR_L];
  strcpy(command, str_is_empty(editor) ? "nano" : editor);
  strcat(command, " ");
  strcat(command, confPath);
  system(command);
  return 0;
 error:
  close_DB(&db);
  return 1;
}

int run_LIST(UserOpt *opt, Conf *conf) {
  DB db = open_DB(opt);
  if (db.ptr == NULL) {
    if (db.error == SQL_ERR_NO_TABLES) {
      ERR("The database file is currupted. Run ck init anew.");
    }
    return 1;
  }

  cklist *the_list = list_make_new();
  ListOpt listOpt = list_make_options(opt->args);

  if (listOpt.err) {
    ERR("Wrong list options.");
    goto error;
  }
  char tmp[STR_L] = "";
  switch(listOpt._lt) {
  case LT_PATH:
    list_get_paths(&db, the_list, listOpt.attr);
    break;
  case LT_PROGRAM:
    list_get_programs(&db, the_list);
    break;
  case LT_TREE:
    list_get_path_program_tree(&db, the_list, listOpt.attr);
    list_print(the_list);
    goto close;
  case LT_CKCONF:
    strcat(tmp, "ck configuration directory path: ");
    strcat(tmp, opt->confDir);
    list_add(the_list, tmp);
#define X(var, str, name)                       \
    strcpy(tmp, "");                            \
    strcat(tmp, name);                          \
    strcat(tmp, ": ");                          \
    strcat(tmp, conf->var);                     \
    list_add(the_list, tmp);
    CONFIG_VARIABLES_TABLE;
#undef X
    list_print(the_list);
    goto close;
  case LT_PROG_CONFS:
    if (!program_exists(&db, listOpt.pName)) {
      ERR("Program %s doesn't exist in the database.", listOpt.pName);
      goto error;
    }
    get_program_paths(&db, the_list, listOpt.pName, 0, listOpt.attr);
    break;
  }
  switch(listOpt._lst) {
  case LST_PLAIN:
    list_print(the_list);
    break;
  case LST_LISP:
    list_print_lisp(the_list);
    break;
  case LST_PYTHON:
    list_print_python(the_list);
  }
 close:
  close_DB(&db);
  list_free(the_list);
  return 0;
 error:
  close_DB(&db);
  list_free(the_list);
  return 1;
}

FILE *popen(const char *command, const char *mode);
int pclose(FILE *stream);

int run_SEARCH(UserOpt *opt, Conf *conf) {
  if (system("which grep > /dev/null") != 0) {
    return 2;
  }
  DB db = open_DB(opt);
  cklist *paths = list_make_new();
  list_get_paths(&db, paths, 0);
  close_DB(&db);
  if (list_size(paths) && list_size(opt->args)) {
    do {
      FILE *cmd;
      char result[STR_L] = "";
      char command[STR_L] = "grep -H -n \"";
      strcat(command, list_get(opt->args));
      strcat(command, "\" ");
      strcat(command, list_get(paths));
      cmd = popen(command, "r");
      if (cmd == NULL) {
        list_free(paths);
        return 1;
      }
      while (fgets(result, sizeof(result), cmd)) {
        printf("%s", result);
      }
      pclose(cmd);
    } while(list_next(paths));
  }
  list_free(paths);
  return 0;
}

int run_HELP(UserOpt *opt, Conf *conf) {
  UNUSED(conf);
  switch(parser_get_action(list_get(opt->args), NULL)) {
#define X(ACTION)                                               \
    case CKA_##ACTION:                                          \
      print_##ACTION##_help();                                  \
      return 0;
    CK_ACTIONS
#undef X
  default:
    ERR("Unknown action: %s", list_get(opt->args));
  }
  return 1;
}