"use strict";
var __rest = (this && this.__rest) || function (s, e) {
    var t = {};
    for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
        t[p] = s[p];
    if (s != null && typeof Object.getOwnPropertySymbols === "function")
        for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {
            if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))
                t[p[i]] = s[p[i]];
        }
    return t;
};
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const isEventTarget_1 = __importDefault(require("./isEventTarget"));
const eventOptionsSupported_1 = __importDefault(require("./eventOptionsSupported"));
const on_1 = __importDefault(require("./on"));
const off_1 = __importDefault(require("./off"));
const manuelOnce = (elm, handler, when) => {
    const offHandler = (e) => {
        if (when && when(e) !== true) {
            return true;
        }
        off_1.default(elm, e.type, offHandler);
        return 'handleEvent' in handler
            ? handler.handleEvent(e)
            : handler(e);
    };
    return offHandler;
};
const bind = (elm, eventNames, handler, options) => {
    const noOptions = !eventOptionsSupported_1.default();
    const _a = options || {}, { when } = _a, eventOptions = __rest(_a, ["when"]);
    eventOptions.once = !when;
    const eventHandler = when || noOptions
        ? manuelOnce(elm, handler, when)
        : handler;
    on_1.default(elm, eventNames, eventHandler, eventOptions);
    return () => off_1.default(elm, eventNames, eventHandler, eventOptions);
};
function once(elm, eventNames, handler, options) {
    if (!isEventTarget_1.default(elm)) {
        options = handler;
        handler = eventNames;
        eventNames = elm;
        elm = document;
    }
    return bind(elm, eventNames, handler, options);
}
exports.default = once;