'use strict';

/* global CloudCmd, DOM */

CloudCmd.EditNames = exports;

const currify = require('currify/legacy');
const exec = require('execon');
const supermenu = require('supermenu');

const reject = Promise.reject.bind(Promise);

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

const TITLE = 'Edit Names';
const alert = currify(Dialog.alert, TITLE);
const refresh = currify(_refresh);
const rename = currify(_rename);

let Menu;

const EditNames = exec.bind();
const ConfigView  = {
    beforeClose: () => {
        exec.ifExist(Menu, 'hide');
        DOM.Events.remove('keydown', keyListener);
        isChanged();
    }
};

module.exports.init = async () => {
    await CloudCmd.Edit();
    
    const editor = CloudCmd.Edit.getEditor();
    setListeners(editor);
};

module.exports.show = (options) => {
    const names = getActiveNames().join('\n');
    const config = {
        ...ConfigView, 
        ...options,
    };
    
    if (Info.name === '..' && names.length === 1)
        return Dialog.alert.noFiles(TITLE);
    
    DOM.Events.addKey(keyListener);
    
    CloudCmd.Edit
        .getEditor()
        .setValueFirst('edit-names', names)
        .setMode()
        .setOption('keyMap', 'default')
        .disableKey();
    
    CloudCmd.Edit.show(config);
     
    return CloudCmd.Edit;
};

function keyListener(event) {
    const ctrl = event.ctrlKey;
    const meta = event.metaKey;
    const ctrlMeta = ctrl || meta;
    const Key = CloudCmd.Key;
    
    if (!ctrlMeta || event.keyCode !== Key.S)
        return;
    
    EditNames.hide();
}

function getActiveNames() {
    return DOM.getFilenames(DOM.getActiveFiles());
}

module.exports.hide = () => {
    CloudCmd.Edit.hide();
};

function setListeners() {
    const element = CloudCmd.Edit.getElement();
    
    DOM.Events.addOnce('contextmenu', element, setMenu);
}

function applyNames() {
    const dir = Info.dirPath;
    const from = getActiveNames();
    const nameIndex = from.indexOf(Info.name);
    
    const editor = CloudCmd.Edit.getEditor();
    const to = editor
        .getValue()
        .split('\n');
    
    const root = CloudCmd.config('root');
    
    Promise.resolve(root)
        .then(rename(dir, from, to))
        .then(refresh(to, nameIndex))
        .catch(alert);
}

function _refresh(to, nameIndex, res) {
    if (res.status === 404)
        return res.text().then(reject);
    
    const currentName = to[nameIndex];
    
    CloudCmd.refresh({
        currentName
    });
}

function getDir(root, dir) {
    if (root === '/')
        return dir;
    
    return root + dir;
}

function _rename(path, from, to, root) {
    const dir = getDir(root, path);
    
    return fetch(CloudCmd.PREFIX + '/rename', {
        method: 'put',
        credentials: 'include',
        body: JSON.stringify({
            from,
            to,
            dir,
        })
    });
}

function setMenu(event) {
    const position = {
        x: event.clientX,
        y: event.clientY
    };
    
    event.preventDefault();
    
    if (Menu)
        return;
    
    const editor = CloudCmd.Edit.getEditor();
    const options = {
        beforeShow: (params) => {
            params.x -= 18;
            params.y -= 27;
        },
        
        afterClick: () => {
            editor.focus();
        }
    };
    
    const menuData = {
        'Save           Ctrl+S' : () => {
            editor.save();
            EditNames.hide();
        },
        'Go To Line     Ctrl+G' : () => {
            editor.goToLine();
        },
        'Cut            Ctrl+X' : () => {
            editor.cutToClipboard();
        },
        'Copy           Ctrl+C' : () => {
            editor.copyToClipboard();
        },
        'Paste          Ctrl+V' : () => {
            editor.pasteFromClipboard();
        },
        'Delete         Del'    : () => {
            editor.remove('right');
        },
        'Select All     Ctrl+A' : () => {
            editor.selectAll();
        },
        'Close          Esc'    : () => {
            EditNames.hide();
        }
    };
    
    const element = CloudCmd.Edit.getElement();
    
    Menu = supermenu(element, options, menuData);
    Menu.show(position.x, position.y);
}

module.exports.isChanged = isChanged;

function isChanged() {
    const editor = CloudCmd.Edit.getEditor();
    const msg = 'Apply new names?';
    
    if (!editor.isChanged())
        return;
    
    Dialog.confirm(TITLE, msg, {cancel: false})
        .then(applyNames);
}