export type Format = 'RFC1738' | 'RFC3986';

export type DefaultEncoder = (str: any, defaultEncoder?: any, charset?: string) => string;
export type DefaultDecoder = (str: string, decoder?: any, charset?: string) => string;

export type BooleanOptional = boolean | undefined;

export type StringifyBaseOptions = {
  delimiter?: string;
  allowDots?: boolean;
  encodeDotInKeys?: boolean;
  strictNullHandling?: boolean;
  skipNulls?: boolean;
  encode?: boolean;
  encoder?: (
    str: any,
    defaultEncoder: DefaultEncoder,
    charset: string,
    type: 'key' | 'value',
    format?: Format,
  ) => string;
  filter?: Array<PropertyKey> | ((prefix: PropertyKey, value: any) => any);
  arrayFormat?: 'indices' | 'brackets' | 'repeat' | 'comma';
  indices?: boolean;
  sort?: ((a: PropertyKey, b: PropertyKey) => number) | null;
  serializeDate?: (d: Date) => string;
  format?: 'RFC1738' | 'RFC3986';
  formatter?: (str: PropertyKey) => string;
  encodeValuesOnly?: boolean;
  addQueryPrefix?: boolean;
  charset?: 'utf-8' | 'iso-8859-1';
  charsetSentinel?: boolean;
  allowEmptyArrays?: boolean;
  commaRoundTrip?: boolean;
};

export type StringifyOptions = StringifyBaseOptions;

export type ParseBaseOptions = {
  comma?: boolean;
  delimiter?: string | RegExp;
  depth?: number | false;
  decoder?: (str: string, defaultDecoder: DefaultDecoder, charset: string, type: 'key' | 'value') => any;
  arrayLimit?: number;
  parseArrays?: boolean;
  plainObjects?: boolean;
  allowPrototypes?: boolean;
  allowSparse?: boolean;
  parameterLimit?: number;
  strictDepth?: boolean;
  strictNullHandling?: boolean;
  ignoreQueryPrefix?: boolean;
  charset?: 'utf-8' | 'iso-8859-1';
  charsetSentinel?: boolean;
  interpretNumericEntities?: boolean;
  allowEmptyArrays?: boolean;
  duplicates?: 'combine' | 'first' | 'last';
  allowDots?: boolean;
  decodeDotInKeys?: boolean;
};

export type ParseOptions = ParseBaseOptions;

export type ParsedQs = {
  [key: string]: undefined | string | string[] | ParsedQs | ParsedQs[];
};

// Type to remove null or undefined union from each property
export type NonNullableProperties<T> = {
  [K in keyof T]-?: Exclude<T[K], undefined | null>;
};