/* global CloudCmd */
/* global DOM */

import vim from './vim.js';
import finder from './find.js';

const Info = DOM.CurrentInfo;
const {Dialog} = DOM;

export default async (key, event) => {
    const operations = getOperations(event);
    await vim(key, operations);
};

const getOperations = (event) => {
    return {
        escape: DOM.unselectFiles,
        remove: () => {
            CloudCmd.Operation.show('delete');
        },
        copy: () => {
            DOM.Buffer.copy();
            DOM.unselectFiles();
        },
        select: () => {
            const current = Info.element;
            DOM.toggleSelectedFile(current);
        },
        paste: DOM.Buffer.paste,
        moveNext: ({count, isVisual, isDelete}) => {
            setCurrent('next', {
                count,
                isVisual,
                isDelete,
            });
        },
        movePrevious: ({count, isVisual, isDelete}) => {
            setCurrent('previous', {
                count,
                isVisual,
                isDelete,
            });
        },
        find: async () => {
            event.preventDefault();
            const [, value] = await Dialog.prompt('Find', '');
            
            if (!value)
                return;
            
            const names = Info.files.map(DOM.getCurrentName);
            const [result] = finder.find(value, names);
            
            DOM.setCurrentByName(result);
        },
        findNext: () => {
            const name = finder.findNext();
            DOM.setCurrentByName(name);
        },
        findPrevious: () => {
            const name = finder.findPrevious();
            DOM.setCurrentByName(name);
        },
    };
};

export function selectFile(current) {
    const name = DOM.getCurrentName(current);
    
    if (name === '..')
        return;
    
    DOM.selectFile(current);
}

function setCurrent(sibling, {count, isVisual, isDelete}) {
    let current = Info.element;
    const select = isVisual ? selectFile : DOM.unselectFile;
    
    select(current);
    
    const position = `${sibling}Sibling`;
    for (let i = 0; i < count; i++) {
        const next = current[position];
        
        if (!next)
            break;
        
        current = next;
        select(current);
    }
    
    DOM.setCurrentFile(current);
    
    if (isDelete)
        CloudCmd.Operation.show('delete');
}