/* init.c - the init action --------------------------------------------*- C -*-
 *
 * This file is part of ck, the config keeper
 *
 * -----------------------------------------------------------------------------
 *
 * Copyright (C) 2019  Anastasis Grammenos
 * GPLv3 (see LICENCE for the full notice)
 *
 * -------------------------------------------------------------------------- */
#include "dblayer.h"
#include "ckerrlog.h"

ERRLOG(init);

static int init_create_config_file(UserOpt *opt) {
  char absVCdir[STR_L] = "";
  list_rewind(opt->args);
  if (!util_file_exists(list_get(opt->args), absVCdir)) {
    ERR("Version control directory: %s does not exist.", list_get_at(opt->args, 0));
    return 1;
  }

  char absSRdir[STR_L] = "";
  if (list_next(opt->args)) {
    if (!util_file_exists(list_get_at(opt->args, 1), absSRdir)) {
      ERR("Secret directory: %s does not exist.", list_get_at(opt->args, 1));
      return 1;
    }
  }

  if (!util_file_exists(opt->confDir, NULL)) {
    util_mkdir(opt->confDir);
  }

  char confName[STR_L] = "";
  make_config_name(confName, opt->confDir);
  FILE *f;
  if ((f = fopen(confName, "w")) == NULL) {
    return 1;
  }

  char tmp[STR_L] = "";
  strcpy(tmp, "version_control_dir = ");
  strcat(tmp, absVCdir);
  strcat(tmp, "\n");
  fputs(tmp, f);

  /* if absSRdir is not equal to "" */
  if (strcmp(absSRdir, "")) {
    strcpy(tmp, "secret_dir = ");
    strcat(tmp, absSRdir);
    strcat(tmp, "\n");
    fputs(tmp, f);
  }

  strcpy(tmp, "home_dir = ");
  strcat(tmp, getenv("HOME"));
  strcat(tmp, "\n");
  fputs(tmp, f);

  strcpy(tmp, "# Uncomment this line to enable logging in file\n");
  fputs(tmp, f);

  strcpy(tmp, "# log_dir = ");
  strcat(tmp, opt->confDir);
  strcat(tmp, "\n");
  fputs(tmp, f);

  fclose(f);
  return 0;
}

static int set_secret_enabled(DB *db, int enabled) {
  sqlite3_stmt *stmt;
  int rc;

  char sql[STR_M] = "";
  dbh_form_query_set_secret_enabled(sql);

  rc = sqlite3_prepare_v2(db->ptr, sql, -1, &stmt, 0);
  if (rc != SQLITE_OK) {
    ERR("while preparing set_secret_enabled sql.");
    return -2;
  }
  sqlite3_bind_int(stmt, 1, enabled);
  if (sqlite3_step(stmt) != SQLITE_DONE) {
    ERR("while excecuting set_secret_enabled sql.");
    return -1;
  }
  sqlite3_finalize(stmt);
  return 0;
}

static void init_make_tables(DB *db) {
  char sql[STR_L] = "";
  dbh_form_query_make_tables(sql);

  int rc = sqlite3_exec(db->ptr, sql, 0, 0, 0);
  if (rc != SQLITE_OK ) {
    PRINT_ERR("Could not create empty db.");
    db->error = SQL_ERR_SQLITE;
    return;
  }
}

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)) {
    sERR("Cound not create config file.");
    return -1;
  }
  DB db;
  if (open_DB(&db, opt)) {
    return -1;
  }
  init_make_tables(&db);
  /* If there are two arguments secret is enabled */
  set_secret_enabled(&db, list_size(opt->args) == 2);
  sqlite3_close(db.ptr);
  hLOG("Initialized empty ckdb.");
  return 0;
}

void print_INIT_help() {
  HELP("ck init VERSION_CONTROL_DIR [SECRET_DIR]");
}