/**
 * **This module is experimental**
 *
 * Experimental features are published in order to get early feedback from the community, see these tracking
 * [issues](https://github.com/gcanti/io-ts/issues?q=label%3Av2.2+) for further discussions and enhancements.
 *
 * A feature tagged as _Experimental_ is in a high state of flux, you're at risk of it changing without notice.
 *
 * @since 2.2.0
 */
import { identity } from 'fp-ts/es6/function';
import { pipe } from 'fp-ts/es6/pipeable';
import * as S from './Schemable';
// -------------------------------------------------------------------------------------
// constructors
// -------------------------------------------------------------------------------------
/**
 * @category constructors
 * @since 2.2.0
 */
export var literal = function () {
    var values = [];
    for (var _i = 0; _i < arguments.length; _i++) {
        values[_i] = arguments[_i];
    }
    return ({
        is: function (u) { return values.findIndex(function (a) { return a === u; }) !== -1; }
    });
};
// -------------------------------------------------------------------------------------
// primitives
// -------------------------------------------------------------------------------------
/**
 * @category primitives
 * @since 2.2.0
 */
export var string = {
    is: function (u) { return typeof u === 'string'; }
};
/**
 * Note: `NaN` is excluded.
 *
 * @category primitives
 * @since 2.2.0
 */
export var number = {
    is: function (u) { return typeof u === 'number' && !isNaN(u); }
};
/**
 * @category primitives
 * @since 2.2.0
 */
export var boolean = {
    is: function (u) { return typeof u === 'boolean'; }
};
/**
 * @category primitives
 * @since 2.2.0
 */
export var UnknownArray = {
    is: Array.isArray
};
/**
 * @category primitives
 * @since 2.2.0
 */
export var UnknownRecord = {
    is: function (u) { return u !== null && typeof u === 'object' && !Array.isArray(u); }
};
// -------------------------------------------------------------------------------------
// combinators
// -------------------------------------------------------------------------------------
/**
 * @category combinators
 * @since 2.2.0
 */
export var refine = function (refinement) { return function (from) { return ({
    is: function (i) { return from.is(i) && refinement(i); }
}); }; };
/**
 * @category combinators
 * @since 2.2.0
 */
export var nullable = function (or) { return ({
    is: function (i) { return i === null || or.is(i); }
}); };
/**
 * @category combinators
 * @since 2.2.15
 */
export var struct = function (properties) {
    return pipe(UnknownRecord, refine(function (r) {
        for (var k in properties) {
            if (!(k in r) || !properties[k].is(r[k])) {
                return false;
            }
        }
        return true;
    }));
};
/**
 * Use `struct` instead.
 *
 * @category combinators
 * @since 2.2.0
 * @deprecated
 */
export var type = struct;
/**
 * @category combinators
 * @since 2.2.0
 */
export var partial = function (properties) {
    return pipe(UnknownRecord, refine(function (r) {
        for (var k in properties) {
            var v = r[k];
            if (v !== undefined && !properties[k].is(v)) {
                return false;
            }
        }
        return true;
    }));
};
/**
 * @category combinators
 * @since 2.2.0
 */
export var array = function (item) {
    return pipe(UnknownArray, refine(function (us) { return us.every(item.is); }));
};
/**
 * @category combinators
 * @since 2.2.0
 */
export var record = function (codomain) {
    return pipe(UnknownRecord, refine(function (r) {
        for (var k in r) {
            if (!codomain.is(r[k])) {
                return false;
            }
        }
        return true;
    }));
};
/**
 * @category combinators
 * @since 2.2.0
 */
export var tuple = function () {
    var components = [];
    for (var _i = 0; _i < arguments.length; _i++) {
        components[_i] = arguments[_i];
    }
    return ({
        is: function (u) { return Array.isArray(u) && u.length === components.length && components.every(function (c, i) { return c.is(u[i]); }); }
    });
};
/**
 * @category combinators
 * @since 2.2.0
 */
export var intersect = function (right) { return function (left) { return ({
    is: function (u) { return left.is(u) && right.is(u); }
}); }; };
/**
 * @category combinators
 * @since 2.2.0
 */
export var union = function () {
    var members = [];
    for (var _i = 0; _i < arguments.length; _i++) {
        members[_i] = arguments[_i];
    }
    return ({
        is: function (u) { return members.some(function (m) { return m.is(u); }); }
    });
};
/**
 * @category combinators
 * @since 2.2.0
 */
export var sum = function (tag) { return function (members) {
    return pipe(UnknownRecord, refine(function (r) {
        var v = r[tag];
        if (v in members) {
            return members[v].is(r);
        }
        return false;
    }));
}; };
/**
 * @category combinators
 * @since 2.2.0
 */
export var lazy = function (f) {
    var get = S.memoize(f);
    return {
        is: function (u) { return get().is(u); }
    };
};
/**
 * @category combinators
 * @since 2.2.15
 */
export var readonly = identity;
/**
 * @category combinators
 * @since 2.2.8
 */
export var alt = function (that) { return function (me) { return ({
    is: function (i) { return me.is(i) || that().is(i); }
}); }; };
/**
 * @category combinators
 * @since 2.2.8
 */
export var zero = function () { return ({
    is: function (_) { return false; }
}); };
/**
 * @category combinators
 * @since 2.2.8
 */
export var compose = function (to) { return function (from) { return ({
    is: function (i) { return from.is(i) && to.is(i); }
}); }; };
/**
 * @category combinators
 * @since 2.2.8
 */
export var id = function () { return ({
    is: function (_) { return true; }
}); };
// -------------------------------------------------------------------------------------
// instances
// -------------------------------------------------------------------------------------
/**
 * @category instances
 * @since 2.2.0
 */
export var URI = 'io-ts/Guard';
/**
 * @category instances
 * @since 2.2.8
 */
export var Schemable = {
    URI: URI,
    literal: literal,
    string: string,
    number: number,
    boolean: boolean,
    nullable: nullable,
    type: type,
    struct: struct,
    partial: partial,
    record: record,
    array: array,
    tuple: tuple,
    intersect: intersect,
    sum: sum,
    lazy: function (_, f) { return lazy(f); },
    readonly: readonly
};
/**
 * @category instances
 * @since 2.2.8
 */
export var WithUnknownContainers = {
    UnknownArray: UnknownArray,
    UnknownRecord: UnknownRecord
};
/**
 * @category instances
 * @since 2.2.8
 */
export var WithUnion = {
    union: union
};
/**
 * @category instances
 * @since 2.2.8
 */
export var WithRefine = {
    refine: refine
};