// Copyright (c) 2022, Compiler Explorer Authors
// All rights reserved.
//
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//     * Redistributions of source code must retain the above copyright notice,
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//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// 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
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// 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; // eslint-disable-line no-useless-return
}

export type PropertyGetter = typeof superficialGetter;