// Copyright (C) 2022 WYATT GROUP
// Please see the AUTHORS file for details.
//
// 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, either version 3 of the License, or
// any later version.
//
// 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 'dart:convert';

/// Defines some convert functions.
abstract class Convert {
  /// Converts a list of bytes to a hex string.
  ///
  /// If [upperCase] is `true`, the hex string will be in uppercase.
  static String toHex(List<int> bytes, {bool upperCase = false}) {
    final buffer = StringBuffer();
    for (final int part in bytes) {
      if (part & 0xff != part) {
        throw const FormatException('Non-byte integer detected');
      }
      buffer.write('${part < 16 ? '0' : ''}${part.toRadixString(16)}');
    }
    if (upperCase) {
      return buffer.toString().toUpperCase();
    } else {
      return buffer.toString();
    }
  }

  /// Converts a map to a query string.
  ///
  /// If [encoding] is `null`, the default encoding is `utf8`.
  ///
  /// For example, the map `{a: 1, b: 2}` will be converted to `a=1&b=2`.
  static String mapToQuery(Map<String, String> map, {Encoding? encoding}) {
    final pairs = <List<String>>[];
    map.forEach(
      (key, value) => pairs.add([
        Uri.encodeQueryComponent(key, encoding: encoding ?? utf8),
        Uri.encodeQueryComponent(value, encoding: encoding ?? utf8),
      ]),
    );
    return pairs.map((pair) => '${pair[0]}=${pair[1]}').join('&');
  }
}

extension UriX on Uri {
  /// Returns a new [Uri] by appending the given [path] to this [Uri].
  Uri operator +(String path) {
    final thisPath = toString();
    return Uri.parse(thisPath + path);
  }
}