import { CronJob } from "cron";
import fs from "fs";

import { DateTime } from "luxon";
import logger from "../config/winston.js";
import type { Settings } from "../types/settings.js";

const settingsPath = "/data/backup_conf.json";

function check_cron(conf: Settings) {
  if (conf.cron_base != null) {
    if (
      conf.cron_base == "1" ||
      conf.cron_base == "2" ||
      conf.cron_base == "3"
    ) {
      if (conf.cron_hour != null && conf.cron_hour.match(/\d\d:\d\d/)) {
        if (conf.cron_base === "1") return true;
      } else return false;
    }

    if (conf.cron_base === "2") {
      return (
        conf.cron_weekday != null &&
        conf.cron_weekday >= 0 &&
        conf.cron_weekday <= 6
      );
    }

    if (conf.cron_base === "3") {
      return (
        conf.cron_month_day != null &&
        conf.cron_month_day >= 1 &&
        conf.cron_month_day <= 28
      );
    }

    if (conf.cron_base === "4") {
      if (conf.cron_custom != null) {
        try {
          // TODO Need to be destroy
          new CronJob(conf.cron_custom, () => {                                                    
            //Do nothing
          });
          return true;
        } catch (e) {
          return false;
        }
      } else return false;
    }

    if (conf.cron_base === "0") return true;
  } else return false;

  return false;
}

function check(conf: Settings, fallback = false) {
  let needSave = false;
  if (!check_cron(conf)) {
    if (fallback) {
      logger.warn("Bad value for cron settings, fallback to default ");
      conf.cron_base = "0";
      conf.cron_hour = "00:00";
      conf.cron_weekday = 0;
      conf.cron_month_day = 1;
      conf.cron_custom = "5 4 * * *";
    } else {
      logger.error("Bad value for cron settings");
      return [false, "Bad cron settings"];
    }
  }
  if (!conf.name_template) {
    if (fallback) {
      logger.warn("Bad value for 'name_template', fallback to default ");
      conf.name_template = "{type}-{ha_version}-{date}_{hour}";
    } else {
      logger.error("Bad value for 'name_template'");
      return [false, "Bad value for 'name_template'"];
    }
  }
  if (
    conf.auto_clean_local_keep == undefined ||
    !/^\d+$/.test(conf.auto_clean_local_keep)
  ) {
    if (fallback) {
      logger.warn("Bad value for 'auto_clean_local_keep', fallback to 5 ");
      conf.auto_clean_local_keep = "5";
    } else {
      logger.error("Bad value for 'auto_clean_local_keep'");
      return [false, "Bad value for 'auto_clean_local_keep'"];
    }
  }
  if (
    conf.auto_clean_backup_keep == undefined ||
    !/^\d+$/.test(conf.auto_clean_backup_keep)
  ) {
    if (fallback) {
      logger.warn("Bad value for 'auto_clean_backup_keep', fallback to 5 ");
      conf.auto_clean_backup_keep = "5";
    } else {
      logger.error("Bad value for 'auto_clean_backup_keep'");
      return [false, "Bad value for 'auto_clean_backup_keep'"];
    }
  }
  if (conf.auto_clean_local == undefined) {
    if (fallback) {
      logger.warn("Bad value for 'auto_clean_local', fallback to false ");
      conf.auto_clean_local = "false";
    } else {
      logger.error("Bad value for 'auto_clean_local'");
      return [false, "Bad value for 'auto_clean_local'"];
    }
  }
  if (conf.auto_clean_backup == undefined) {
    if (fallback) {
      logger.warn("Bad value for 'auto_clean_backup', fallback to false ");
      conf.auto_clean_backup = "false";
    } else {
      logger.error("Bad value for 'auto_clean_backup'");
      return [false, "Bad value for 'auto_clean_backup'"];
    }
  }
  if (conf.exclude_addon == undefined) {
    if (fallback) {
      logger.warn("Bad value for 'exclude_addon', fallback to [] ");
      conf.exclude_addon = [];
    } else {
      logger.error("Bad value for 'exclude_addon'");
      return [false, "Bad value for 'exclude_addon'"];
    }
  }
  if (conf.exclude_folder == undefined) {
    if (fallback) {
      logger.warn("Bad value for 'exclude_folder', fallback to [] ");
      conf.exclude_folder = [];
    } else {
      logger.error("Bad value for 'exclude_folder'");
      return [false, "Bad value for 'exclude_folder'"];
    }
  }
  if (conf.auto_stop_addon == undefined) {
    if (fallback) {
      logger.warn("Bad value for 'auto_stop_addon', fallback to [] ");
      conf.auto_stop_addon = [];
    } else {
      logger.error("Bad value for 'auto_stop_addon'");
      return [false, "Bad value for 'auto_stop_addon'"];
    }
  }

  if (!Array.isArray(conf.exclude_folder)) {
    logger.debug("exclude_folder is not array (Empty value), reset...");
    conf.exclude_folder = [];
    needSave = true;
  }
  if (!Array.isArray(conf.exclude_addon)) {
    logger.debug("exclude_addon is not array (Empty value), reset...");
    conf.exclude_addon = [];
    needSave = true;
  }
  if (conf.password_protected == undefined) {
    if (fallback) {
      logger.warn("Bad value for 'password_protected', fallback to false ");
      conf.password_protected = "false";
    } else {
      logger.error("Bad value for 'password_protect_value'");
      return [false, "Bad value for 'password_protect_value'"];
    }
  }

  if (conf.password_protect_value == null) {
    if (fallback) {
      logger.warn("Bad value for 'password_protect_value', fallback to '' ");
      conf.password_protect_value = "";
    } else {
      logger.error("Bad value for 'password_protect_value'");
      return [false, "Bad value for 'password_protect_value'"];
    }
  }

  if (fallback || needSave) {
    setSettings(conf);
  }
  return [true, null];
}

function getFormatedName(is_manual: boolean, ha_version: string) {
  const setting = getSettings();
  let template = setting.name_template;
  template = template.replace("{type_low}", is_manual ? "manual" : "auto");
  template = template.replace("{type}", is_manual ? "Manual" : "Auto");
  template = template.replace("{ha_version}", ha_version);
  const now = DateTime.now().setLocale("en");
  template = template.replace("{hour_12}", now.toFormat("hhmma"));
  template = template.replace("{hour}", now.toFormat("HHmm"));
  template = template.replace("{date}", now.toFormat("yyyy-MM-dd"));
  return template;
}

function getSettings() {
  if (!fs.existsSync(settingsPath)) {
    return {};
  } else {
    return JSON.parse(fs.readFileSync(settingsPath).toString());
  }
}

function setSettings(settings: Settings) {
  fs.writeFileSync(settingsPath, JSON.stringify(settings));
}

export { getSettings, setSettings, check, check_cron, getFormatedName };