// Copyright (c) 2022, Compiler Explorer Authors
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//     * Redistributions of source code must retain the above copyright notice,
//       this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
//       documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.

export type PropertyValue = string | boolean | number | undefined;

// names don't matter
interface TypeMap {
    a: string;
    b: boolean;
    c: number;
    d: undefined;
}

export type Widen<T> = T extends T
    ? {
          [P in keyof TypeMap]: T extends TypeMap[P] ? TypeMap[P] : never;
      }[keyof TypeMap]
    : T;

// TODO(jeremy-rifkin): I think the types could use some work here.
// Maybe props<string>(property) should be string | undefined.

function superficialGetter(property: string, defaultValue?: undefined): PropertyValue;
function superficialGetter<T extends PropertyValue>(property: string, defaultValue: Widen<T>): typeof defaultValue;
function superficialGetter<T extends PropertyValue>(property: string, defaultValue?: unknown): T;
function superficialGetter(property: string, defaultValue?: unknown): unknown {
    return;
}

export type PropertyGetter = typeof superficialGetter;
