import 'dart:math';

import 'package:tuuli_api/tuuli_api.dart';
import 'package:tuuli_app/models/user_definition.dart';

Random _random = Random();

String randomHexString(int length) {
  StringBuffer sb = StringBuffer();
  for (var i = 0; i < length; i++) {
    sb.write(_random.nextInt(16).toRadixString(16));
  }
  return sb.toString();
}

String postgresDateFormat(DateTime dt) {
  int yearSign = dt.year.sign;
  int absYear = dt.year.abs();
  String y = absYear
      .toString()
      .padLeft((dt.year >= -9999 && dt.year <= 9999) ? 4 : 6, "0");
  if (yearSign == -1) {
    y = "-$y";
  }
  String m = dt.month.toString().padLeft(2, "0");
  String d = dt.day.toString().padLeft(2, "0");
  String h = dt.hour.toString().padLeft(2, "0");
  String min = dt.minute.toString().padLeft(2, "0");
  String sec = dt.second.toString().padLeft(2, "0");

  return "$y-$m-$d $h:$min:$sec";
}

Map<String, dynamic> convertToPayload(Map<String, dynamic> data) {
  return data.map((key, value) {
    if (value is UserDefinition) {
      return MapEntry(key, value.id);
    } else if (value is Asset) {
      return MapEntry(key, value.id);
    } else if (value is DateTime) {
      return MapEntry(key, postgresDateFormat(value));
    }

    return MapEntry(key, value);
  });
}