"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.zipWithNext = void 0;
// ets_tracing: off
const A = __importStar(require("../../Collections/Immutable/Chunk"));
const Tp = __importStar(require("../../Collections/Immutable/Tuple"));
const Function_1 = require("../../Function");
const O = __importStar(require("../../Option"));
const T = __importStar(require("../_internal/effect"));
const M = __importStar(require("../_internal/managed"));
const Ref = __importStar(require("../_internal/ref"));
const Pull = __importStar(require("../Pull"));
const definitions_1 = require("./definitions");
/**
 * Zips each element with the next element if present.
 */
function zipWithNext(self) {
    return new definitions_1.Stream((M.map_(M.let_(M.let_(M.bind_(M.bind_(M.do, "chunks", () => self.proc), "ref", () => T.toManaged(Ref.makeRef(O.none))), "last", ({ ref }) => (T.map_(T.map_(T.some(Ref.getAndSet_(ref, O.none)), (_) => Tp.tuple(_, O.none)), A.single))), "pull", ({ chunks, ref }) => {
        return (T.map_(T.bind_(T.tap_(T.let_(T.bind_(T.bind_(T.do, "prev", () => ref.get), "chunk", () => chunks), "sc", ({ chunk, prev }) => (A.mapAccum_(chunk, prev, (prev, curr) => Tp.tuple(O.some(curr), O.map_(prev, (_) => Tp.tuple(_, curr)))))), ({ sc }) => ref.set(sc.get(0))), "result", ({ sc }) => Pull.emitChunk(A.filterMap_(sc.get(1), O.fold(() => O.none, ({ tuple: [prev, curr] }) => O.some(Tp.tuple(prev, O.some(curr))))))), ({ result }) => result));
    }), ({ last, pull }) => T.orElseOptional_(pull, () => last))));
}
exports.zipWithNext = zipWithNext;
//# sourceMappingURL=zipWithNext.js.map