import { CodedError, UnavailabilityError } from '@unimodules/core';
import ExpoFontLoader from './ExpoFontLoader';
import { FontDisplay } from './Font.types';
import { getAssetForSource, loadSingleFontAsync, fontFamilyNeedsScoping, getNativeFontName, } from './FontLoader';
const loaded = {};
const loadPromises = {};
/**
 * Used to transform font family names to the scoped name. This does not need to
 * be called in standalone or bare apps but it will return unscoped font family
 * names if it is called in those contexts.
 * note(brentvatne): at some point we may want to warn if this is called
 * outside of a managed app.
 *
 * @param fontFamily name to process
 * @returns a name processed for use with the [current workflow](https://docs.expo.io/versions/latest/introduction/managed-vs-bare/)
 */
export function processFontFamily(fontFamily) {
    if (!fontFamily || !fontFamilyNeedsScoping(fontFamily)) {
        return fontFamily;
    }
    if (!isLoaded(fontFamily)) {
        if (__DEV__) {
            if (isLoading(fontFamily)) {
                console.error(`You started loading the font "${fontFamily}", but used it before it finished loading.\n
- You need to wait for Font.loadAsync to complete before using the font.\n
- We recommend loading all fonts before rendering the app, and rendering only Expo.AppLoading while waiting for loading to complete.`);
            }
            else {
                console.error(`fontFamily "${fontFamily}" is not a system font and has not been loaded through Font.loadAsync.\n
- If you intended to use a system font, make sure you typed the name correctly and that it is supported by your device operating system.\n
- If this is a custom font, be sure to load it with Font.loadAsync.`);
            }
        }
        return 'System';
    }
    return `ExpoFont-${getNativeFontName(fontFamily)}`;
}
/**
 * Synchronously detect if the font for `fontFamily` has finished loading
 *
 * @param fontFamily the name used to load the `FontResource`.
 * @returns `true` if the the font has fully loaded.
 */
export function isLoaded(fontFamily) {
    return fontFamily in loaded;
}
/**
 * Synchronously detect if the font for `fontFamily` is still being loaded
 *
 * @param fontFamily the name used to load the `FontResource`.
 * @returns `true` if the the font is still loading.
 */
export function isLoading(fontFamily) {
    return fontFamily in loadPromises;
}
/**
 * Natively load a font for use with Text elements.
 * @param fontFamilyOrFontMap string or map of values that can be used as the [`fontFamily`](https://reactnative.dev/docs/text#style) style prop with React Native Text elements.
 * @param source the font asset that should be loaded into the `fontFamily` namespace.
 */
export async function loadAsync(fontFamilyOrFontMap, source) {
    if (typeof fontFamilyOrFontMap === 'object') {
        if (source) {
            throw new CodedError(`ERR_FONT_API`, `No fontFamily can be used for the provided source: ${source}. The second argument of \`loadAsync()\` can only be used with a \`string\` value as the first argument.`);
        }
        const fontMap = fontFamilyOrFontMap;
        const names = Object.keys(fontMap);
        await Promise.all(names.map(name => loadFontInNamespaceAsync(name, fontMap[name])));
        return;
    }
    return await loadFontInNamespaceAsync(fontFamilyOrFontMap, source);
}
async function loadFontInNamespaceAsync(fontFamily, source) {
    if (!source) {
        throw new CodedError(`ERR_FONT_SOURCE`, `Cannot load null or undefined font source: { "${fontFamily}": ${source} }. Expected asset of type \`FontSource\` for fontFamily of name: "${fontFamily}"`);
    }
    if (loaded[fontFamily]) {
        return;
    }
    if (loadPromises[fontFamily]) {
        return loadPromises[fontFamily];
    }
    // Important: we want all callers that concurrently try to load the same font to await the same
    // promise. If we're here, we haven't created the promise yet. To ensure we create only one
    // promise in the program, we need to create the promise synchronously without yielding the event
    // loop from this point.
    const asset = getAssetForSource(source);
    loadPromises[fontFamily] = (async () => {
        try {
            await loadSingleFontAsync(fontFamily, asset);
            loaded[fontFamily] = true;
        }
        finally {
            delete loadPromises[fontFamily];
        }
    })();
    await loadPromises[fontFamily];
}
/**
 * Unloads all of the custom fonts. This is used for testing.
 */
export async function unloadAllAsync() {
    if (!ExpoFontLoader.unloadAllAsync) {
        throw new UnavailabilityError('expo-font', 'unloadAllAsync');
    }
    if (Object.keys(loadPromises).length) {
        throw new CodedError(`ERR_UNLOAD`, `Cannot unload fonts while they're still loading: ${Object.keys(loadPromises).join(', ')}`);
    }
    for (const fontFamily of Object.keys(loaded)) {
        delete loaded[fontFamily];
    }
    await ExpoFontLoader.unloadAllAsync();
}
/**
 * Unload custom fonts matching the `fontFamily`s and display values provided.
 * Because fonts are automatically unloaded on every platform this is mostly used for testing.
 *
 * @param fontFamilyOrFontMap the names of the custom fonts that will be unloaded.
 * @param source when `fontFamilyOrFontMap` is a string, this should be the font source used to load the custom font originally.
 */
export async function unloadAsync(fontFamilyOrFontMap, options) {
    if (!ExpoFontLoader.unloadAsync) {
        throw new UnavailabilityError('expo-font', 'unloadAsync');
    }
    if (typeof fontFamilyOrFontMap === 'object') {
        if (options) {
            throw new CodedError(`ERR_FONT_API`, `No fontFamily can be used for the provided options: ${options}. The second argument of \`unloadAsync()\` can only be used with a \`string\` value as the first argument.`);
        }
        const fontMap = fontFamilyOrFontMap;
        const names = Object.keys(fontMap);
        await Promise.all(names.map(name => unloadFontInNamespaceAsync(name, fontMap[name])));
        return;
    }
    return await unloadFontInNamespaceAsync(fontFamilyOrFontMap, options);
}
async function unloadFontInNamespaceAsync(fontFamily, options) {
    if (!loaded[fontFamily]) {
        return;
    }
    else {
        delete loaded[fontFamily];
    }
    // Important: we want all callers that concurrently try to load the same font to await the same
    // promise. If we're here, we haven't created the promise yet. To ensure we create only one
    // promise in the program, we need to create the promise synchronously without yielding the event
    // loop from this point.
    const nativeFontName = getNativeFontName(fontFamily);
    if (!nativeFontName) {
        throw new CodedError(`ERR_FONT_FAMILY`, `Cannot unload an empty name`);
    }
    await ExpoFontLoader.unloadAsync(nativeFontName, options);
}
export { FontDisplay };
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