// @flow

import type { ViewProps } from 'react-native/Libraries/Components/View/ViewPropTypes'
import type { SyntheticEvent } from 'react-native/Libraries/Types/CoreEventTypes'

export type OnLoadEvent = SyntheticEvent<
    $ReadOnly<{
        width: number,
        height: number,
    }>,
>

export type OnProgressEvent = SyntheticEvent<
    $ReadOnly<{|
        loaded: number,
        total: number,
    |}>,
>

export type ResizeMode = $ReadOnly<{|
    contain: 'contain',
    cover: 'cover',
    stretch: 'stretch',
    center: 'center',
|}>

export type Priority = $ReadOnly<{|
    low: 'low',
    normal: 'normal',
    high: 'high',
|}>

export type CacheControl = $ReadOnly<{|
    immutable: 'immutable',
    web: 'web',
    cacheOnly: 'cacheOnly',
|}>

export type ResizeModes = $Values<ResizeMode>
export type Priorities = $Values<Priority>
export type CacheControls = $Values<CacheControl>

export type PreloadFn = (sources: Array<FastImageSource>) => void
export type FastImageSource = {
    uri?: string,
    headers?: Object,
    priority?: Priorities,
    cache?: CacheControls,
}

export type FastImageProps = $ReadOnly<{|
    ...ViewProps,
    onError?: ?() => void,
    onLoad?: ?(event: OnLoadEvent) => void,
    onLoadEnd?: ?() => void,
    onLoadStart?: ?() => void,
    onProgress?: ?(event: OnProgressEvent) => void,

    source?: ?(FastImageSource | number),
    defaultSource?: ?number,

    tintColor?: number | string,
    blurRadius?: number,
    resizeMode?: ?ResizeModes,
    fallback?: ?boolean,
    testID?: ?string,
|}>

declare export default class FastImage extends React$Component<FastImageProps> {
    static resizeMode: ResizeMode;
    static priority: Priority;
    static cacheControl: CacheControl;
    static preload: PreloadFn;
    static clearMemoryCache: () => Promise<void>;
    static clearDiskCache: () => Promise<void>;
}