import { useMemo, useState } from 'react';
import useMountedState from './useMountedState';
import { noop } from './misc/util';
/*
const defaultState: DropAreaState = {
  over: false,
};
*/
var createProcess = function (options, mounted) { return function (dataTransfer, event) {
    var uri = dataTransfer.getData('text/uri-list');
    if (uri) {
        (options.onUri || noop)(uri, event);
        return;
    }
    if (dataTransfer.files && dataTransfer.files.length) {
        (options.onFiles || noop)(Array.from(dataTransfer.files), event);
        return;
    }
    if (dataTransfer.items && dataTransfer.items.length) {
        dataTransfer.items[0].getAsString(function (text) {
            if (mounted) {
                (options.onText || noop)(text, event);
            }
        });
    }
}; };
var createBond = function (process, setOver) { return ({
    onDragOver: function (event) {
        event.preventDefault();
    },
    onDragEnter: function (event) {
        event.preventDefault();
        setOver(true);
    },
    onDragLeave: function () {
        setOver(false);
    },
    onDrop: function (event) {
        event.preventDefault();
        event.persist();
        setOver(false);
        process(event.dataTransfer, event);
    },
    onPaste: function (event) {
        event.persist();
        process(event.clipboardData, event);
    },
}); };
var useDropArea = function (options) {
    if (options === void 0) { options = {}; }
    var onFiles = options.onFiles, onText = options.onText, onUri = options.onUri;
    var isMounted = useMountedState();
    var _a = useState(false), over = _a[0], setOver = _a[1];
    var process = useMemo(function () { return createProcess(options, isMounted()); }, [onFiles, onText, onUri]);
    var bond = useMemo(function () { return createBond(process, setOver); }, [process, setOver]);
    return [bond, { over: over }];
};
export default useDropArea;