/**
 * Copyright (c) oct16.
 * https://github.com/oct16
 *
 * This source code is licensed under the GPL-3.0 license found in the
 * LICENSE file in the root directory of this source tree.
 *
 */

// reference https://github.com/Microsoft/TypeScript/issues/30984

type CSSOMString = string
type FontFaceLoadStatus = 'unloaded' | 'loading' | 'loaded' | 'error'
type FontFaceSetStatus = 'loading' | 'loaded'

interface FontFace extends FontFaceDescriptors {
    // eslint-disable-next-line @typescript-eslint/no-misused-new
    new (family: string, source: string | ArrayBuffer, descriptors?: FontFaceDescriptors): FontFace
    readonly status: FontFaceLoadStatus
    readonly loaded: Promise<FontFace>
    variationSettings: CSSOMString
    display: CSSOMString
    load(): Promise<FontFace>
}

interface FontFaceDescriptors {
    family: CSSOMString
    style: CSSOMString
    weight: CSSOMString
    stretch: CSSOMString
    unicodeRange: CSSOMString
    variant: CSSOMString
    featureSettings: CSSOMString
}

interface FontFaceSet extends Iterable<FontFace> {
    readonly status: FontFaceSetStatus
    readonly ready: Promise<FontFaceSet>
    add(font: FontFace): void
    check(font: string, text?: string): Boolean // throws exception
    load(font: string, text?: string): Promise<FontFace[]>
    delete(font: FontFace): void
    clear(): void
}

interface Document {
    fonts: FontFaceSet
}
interface Window {
    FontFace: FontFace
}