"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.changesWith = exports.changesWith_ = void 0;
// ets_tracing: off
const CK = __importStar(require("../../../../Collections/Immutable/Chunk"));
const Tp = __importStar(require("../../../../Collections/Immutable/Tuple"));
const O = __importStar(require("../../../../Option"));
const CH = __importStar(require("../../Channel"));
const C = __importStar(require("../core"));
/**
 * Returns a new stream that only emits elements that are not equal to the
 * previous element emitted, using the specified function to determine
 * whether two elements are equal.
 */
function changesWith_(self, equal) {
    const writer = (last) => CH.readWithCause((chunk) => {
        const { tuple: [newLast, newChunk] } = CK.reduce_(chunk, Tp.tuple(last, CK.empty()), ({ tuple: [op, os] }, o1) => {
            if (O.isSome(op)) {
                if (equal.equals(op.value, o1)) {
                    return Tp.tuple(O.some(o1), os);
                }
            }
            return Tp.tuple(O.some(o1), CK.append_(os, o1));
        });
        return CH.zipRight_(CH.write(newChunk), writer(newLast));
    }, (cause) => CH.failCause(cause), (_) => CH.unit);
    return new C.Stream(self.channel[">>>"](writer(O.none)));
}
exports.changesWith_ = changesWith_;
/**
 * Returns a new stream that only emits elements that are not equal to the
 * previous element emitted, using the specified function to determine
 * whether two elements are equal.
 *
 * @ets_data_first changesWith_
 */
function changesWith(equal) {
    return (self) => changesWith_(self, equal);
}
exports.changesWith = changesWith;
//# sourceMappingURL=changesWith.js.map