import { __awaiter } from "tslib";
class Queue {
    constructor() {
        this.status = "waiting";
    }
    append(item, autoRun = true) {
        const node = new Node(item);
        if (!this.current || !this.end) {
            this.current = this.end = node;
        }
        else {
            this.end.setNext(node);
            this.end = node;
        }
        if (autoRun) {
            this.startRun();
        }
    }
    startRun() {
        if (this.status === "waiting") {
            this.run();
        }
    }
    run() {
        return __awaiter(this, void 0, void 0, function* () {
            if (this.current) {
                this.status = "running";
                const current = this.current;
                const self = current.getSelf();
                this.current = this.current.getNext();
                const res = yield self.run();
                current.destroy();
                if (res === false) {
                    this.status = "waiting";
                }
                else {
                    this.run();
                }
            }
            else {
                this.end = undefined;
                this.status = "waiting";
            }
        });
    }
}
class Node {
    constructor(self) {
        this.self = self;
    }
    getSelf() {
        return this.self;
    }
    setPrev(prev) {
        this.prev = prev;
        if (prev) {
            prev.next = this;
        }
    }
    setNext(next) {
        this.next = next;
        if (next) {
            next.prev = this;
        }
    }
    getPrev() {
        return this.prev;
    }
    getNext() {
        return this.next;
    }
    destroy() {
        if (this.prev) {
            this.prev.setNext(undefined);
        }
        if (this.next) {
            this.next.setPrev(undefined);
        }
        this.prev = undefined;
        this.next = undefined;
        this.self = undefined;
    }
}
export { Queue };