import is, { assert } from '@sindresorhus/is';
import asPromise from './as-promise/index.js';
import Request from './core/index.js';
import Options from './core/options.js';
// The `delay` package weighs 10KB (!)
const delay = async (ms) => new Promise(resolve => {
    setTimeout(resolve, ms);
});
const isGotInstance = (value) => is.function_(value);
const aliases = [
    'get',
    'post',
    'put',
    'patch',
    'head',
    'delete',
];
const create = (defaults) => {
    defaults = {
        options: new Options(undefined, undefined, defaults.options),
        handlers: [...defaults.handlers],
        mutableDefaults: defaults.mutableDefaults,
    };
    Object.defineProperty(defaults, 'mutableDefaults', {
        enumerable: true,
        configurable: false,
        writable: false,
    });
    // Got interface
    const got = ((url, options, defaultOptions = defaults.options) => {
        const request = new Request(url, options, defaultOptions);
        let promise;
        const lastHandler = (normalized) => {
            // Note: `options` is `undefined` when `new Options(...)` fails
            request.options = normalized;
            request._noPipe = !normalized.isStream;
            void request.flush();
            if (normalized.isStream) {
                return request;
            }
            if (!promise) {
                promise = asPromise(request);
            }
            return promise;
        };
        let iteration = 0;
        const iterateHandlers = (newOptions) => {
            const handler = defaults.handlers[iteration++] ?? lastHandler;
            const result = handler(newOptions, iterateHandlers);
            if (is.promise(result) && !request.options.isStream) {
                if (!promise) {
                    promise = asPromise(request);
                }
                if (result !== promise) {
                    const descriptors = Object.getOwnPropertyDescriptors(promise);
                    for (const key in descriptors) {
                        if (key in result) {
                            // eslint-disable-next-line @typescript-eslint/no-dynamic-delete
                            delete descriptors[key];
                        }
                    }
                    // eslint-disable-next-line @typescript-eslint/no-floating-promises
                    Object.defineProperties(result, descriptors);
                    result.cancel = promise.cancel;
                }
            }
            return result;
        };
        return iterateHandlers(request.options);
    });
    got.extend = (...instancesOrOptions) => {
        const options = new Options(undefined, undefined, defaults.options);
        const handlers = [...defaults.handlers];
        let mutableDefaults;
        for (const value of instancesOrOptions) {
            if (isGotInstance(value)) {
                options.merge(value.defaults.options);
                handlers.push(...value.defaults.handlers);
                mutableDefaults = value.defaults.mutableDefaults;
            }
            else {
                options.merge(value);
                if (value.handlers) {
                    handlers.push(...value.handlers);
                }
                mutableDefaults = value.mutableDefaults;
            }
        }
        return create({
            options,
            handlers,
            mutableDefaults: Boolean(mutableDefaults),
        });
    };
    // Pagination
    const paginateEach = (async function* (url, options) {
        let normalizedOptions = new Options(url, options, defaults.options);
        normalizedOptions.resolveBodyOnly = false;
        const { pagination } = normalizedOptions;
        assert.function_(pagination.transform);
        assert.function_(pagination.shouldContinue);
        assert.function_(pagination.filter);
        assert.function_(pagination.paginate);
        assert.number(pagination.countLimit);
        assert.number(pagination.requestLimit);
        assert.number(pagination.backoff);
        const allItems = [];
        let { countLimit } = pagination;
        let numberOfRequests = 0;
        while (numberOfRequests < pagination.requestLimit) {
            if (numberOfRequests !== 0) {
                // eslint-disable-next-line no-await-in-loop
                await delay(pagination.backoff);
            }
            // eslint-disable-next-line no-await-in-loop
            const response = (await got(undefined, undefined, normalizedOptions));
            // eslint-disable-next-line no-await-in-loop
            const parsed = await pagination.transform(response);
            const currentItems = [];
            assert.array(parsed);
            for (const item of parsed) {
                if (pagination.filter({ item, currentItems, allItems })) {
                    if (!pagination.shouldContinue({ item, currentItems, allItems })) {
                        return;
                    }
                    yield item;
                    if (pagination.stackAllItems) {
                        allItems.push(item);
                    }
                    currentItems.push(item);
                    if (--countLimit <= 0) {
                        return;
                    }
                }
            }
            const optionsToMerge = pagination.paginate({
                response,
                currentItems,
                allItems,
            });
            if (optionsToMerge === false) {
                return;
            }
            if (optionsToMerge === response.request.options) {
                normalizedOptions = response.request.options;
            }
            else {
                normalizedOptions.merge(optionsToMerge);
                assert.any([is.urlInstance, is.undefined], optionsToMerge.url);
                if (optionsToMerge.url !== undefined) {
                    normalizedOptions.prefixUrl = '';
                    normalizedOptions.url = optionsToMerge.url;
                }
            }
            numberOfRequests++;
        }
    });
    got.paginate = paginateEach;
    got.paginate.all = (async (url, options) => {
        const results = [];
        for await (const item of paginateEach(url, options)) {
            results.push(item);
        }
        return results;
    });
    // For those who like very descriptive names
    got.paginate.each = paginateEach;
    // Stream API
    got.stream = ((url, options) => got(url, { ...options, isStream: true }));
    // Shortcuts
    for (const method of aliases) {
        got[method] = ((url, options) => got(url, { ...options, method }));
        got.stream[method] = ((url, options) => got(url, { ...options, method, isStream: true }));
    }
    if (!defaults.mutableDefaults) {
        Object.freeze(defaults.handlers);
        defaults.options.freeze();
    }
    Object.defineProperty(got, 'defaults', {
        value: defaults,
        writable: false,
        configurable: false,
        enumerable: true,
    });
    return got;
};
export default create;