"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.dropRight = exports.dropRight_ = void 0;
// ets_tracing: off
const CK = __importStar(require("../../../../Collections/Immutable/Chunk"));
const RB = __importStar(require("../../../../Support/RingBufferNew"));
const CH = __importStar(require("../../Channel"));
const C = __importStar(require("../core"));
const Chain = __importStar(require("./chain"));
const SucceedWith = __importStar(require("./succeedWith"));
/**
 * Drops the last specified number of elements from this stream.
 *
 * @note This combinator keeps `n` elements in memory. Be careful with big numbers.
 */
function dropRight_(self, n) {
    if (n <= 0) {
        return new C.Stream(self.channel);
    }
    return Chain.chain_(SucceedWith.succeedWith(() => new RB.RingBufferNew(n)), (queue) => {
        const reader = CH.readWith((in_) => {
            const outs = CK.filterMap_(in_, (elem) => {
                const head = queue.head();
                queue.put(elem);
                return head;
            });
            return CH.zipRight_(CH.write(outs), reader);
        }, (_) => CH.fail(_), (_) => CH.unit);
        return new C.Stream(self.channel[">>>"](reader));
    });
}
exports.dropRight_ = dropRight_;
/**
 * Drops the last specified number of elements from this stream.
 *
 * @note This combinator keeps `n` elements in memory. Be careful with big numbers.
 *
 * @ets_data_first dropRight_
 */
function dropRight(n) {
    return (self) => dropRight_(self, n);
}
exports.dropRight = dropRight;
//# sourceMappingURL=dropRight.js.map