import {Predicate, TypeGuardPredicate} from './types';

import isArray from './array';

import isFunction from './function';

import handleCurry from './utils/handleCurry';

import {getDescription, setDescription} from './utils/description';

import {getPredicateForType} from './typeToPredicate';

/**

* Checks whether every element of an array passes the predicate

*

* @example

* const isArrayOfStrings = is.arrayOf(is.string);

*

* isArrayOfStrings(['1', '2']); // true

* // same as

* is.arrayOf(is.string, ['1', '2']); // true

* // same as

* is.arrayOf(String, ['1', '2']); // true

*

* isArrayOfStrings([1, 2]); // false

*

* @throws {TypeError} if predicate is not a function

*/

function isArrayOf<T = any>(predicate: Predicate | Function): TypeGuardPredicate<Array<T>>;

function isArrayOf<T = any>(predicate: Predicate | Function, value: any[]): value is Array<T>;

function isArrayOf<T>(predicate: Predicate | Function, value?: any[], ...extraArgs: any[]): boolean | TypeGuardPredicate<Array<T>> {

if (!isFunction(predicate)) {

throw new TypeError('Predicate must be a function');

}

predicate = getPredicateForType(predicate) || predicate;

return handleCurry.call(this, arguments,

setDescription(function (value: any) {

const match = (value: any) => predicate.apply(this, [value].concat(extraArgs));

return isArray(value) && value.every(match);

},

'an array of elements of type: ' + getDescription(<Predicate>predicate)

)

);

}

export default isArrayOf;