/*
 * Copyright (C) 2021-2022 Open StApps
 * 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, version 3.
 *
 * 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 <https://www.gnu.org/licenses/>.
 */
import {SCISO8601Date} from '../../general/time.js';

/**
 * Date Range
 */
export type SCISO8601DateRange = SCRange<SCISO8601Date>;

/**
 * Checks if a value is inside a range
 * @param value the value to check
 * @param range the range
 */
export function isInRange<T>(value: T, range: SCRange<T>): boolean {
  return (
    (range.lt == undefined ? (range.lte == undefined ? true : range.lte >= value) : range.lt > value) &&
    (range.gt == undefined ? (range.gte == undefined ? true : range.gte <= value) : range.gt < value)
  );
}

/**
 * Format a range
 * @example '0..4'
 * @example '1=..=3'
 * @example '0..=3'
 */
export function formatRange<T>(range: SCRange<T>): string {
  return `${range.gt ?? range.gte}${range.gte == undefined ? '' : '='}..${range.lte == undefined ? '' : '='}${
    range.lt ?? range.lte
  }`;
}

/**
 * Generic range type
 */
export type SCRange<T> =
  | {
      /**
       * Greater than value
       */
      gt?: never;

      /**
       * Greater or equal to value
       */
      gte?: T;

      /**
       * Greater than value
       */
      lt?: never;

      /**
       * Greater or equal to value
       */
      lte?: T;
    }
  | {
      gt?: T;
      gte?: never;
      lt?: T;
      lte?: never;
    }
  | {
      gt?: T;
      gte?: never;
      lt?: never;
      lte?: T;
    }
  | {
      gt?: never;
      gte?: T;
      lt?: T;
      lte?: never;
    };