/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/
import * as dom from '../../dom.js';
import { EventType, Gesture } from '../../touch.js';
import * as arrays from '../../../common/arrays.js';
import { Emitter } from '../../../common/event.js';
import { Disposable } from '../../../common/lifecycle.js';
import { isMacintosh } from '../../../common/platform.js';
export class SelectBoxNative extends Disposable {
    constructor(options, selected, styles, selectBoxOptions) {
        super();
        this.selected = 0;
        this.selectBoxOptions = selectBoxOptions || Object.create(null);
        this.options = [];
        this.selectElement = document.createElement('select');
        this.selectElement.className = 'monaco-select-box';
        if (typeof this.selectBoxOptions.ariaLabel === 'string') {
            this.selectElement.setAttribute('aria-label', this.selectBoxOptions.ariaLabel);
        }
        if (typeof this.selectBoxOptions.ariaDescription === 'string') {
            this.selectElement.setAttribute('aria-description', this.selectBoxOptions.ariaDescription);
        }
        this._onDidSelect = this._register(new Emitter());
        this.styles = styles;
        this.registerListeners();
        this.setOptions(options, selected);
    }
    registerListeners() {
        this._register(Gesture.addTarget(this.selectElement));
        [EventType.Tap].forEach(eventType => {
            this._register(dom.addDisposableListener(this.selectElement, eventType, (e) => {
                this.selectElement.focus();
            }));
        });
        this._register(dom.addStandardDisposableListener(this.selectElement, 'click', (e) => {
            dom.EventHelper.stop(e, true);
        }));
        this._register(dom.addStandardDisposableListener(this.selectElement, 'change', (e) => {
            this.selectElement.title = e.target.value;
            this._onDidSelect.fire({
                index: e.target.selectedIndex,
                selected: e.target.value
            });
        }));
        this._register(dom.addStandardDisposableListener(this.selectElement, 'keydown', (e) => {
            let showSelect = false;
            if (isMacintosh) {
                if (e.keyCode === 18 /* KeyCode.DownArrow */ || e.keyCode === 16 /* KeyCode.UpArrow */ || e.keyCode === 10 /* KeyCode.Space */) {
                    showSelect = true;
                }
            }
            else {
                if (e.keyCode === 18 /* KeyCode.DownArrow */ && e.altKey || e.keyCode === 10 /* KeyCode.Space */ || e.keyCode === 3 /* KeyCode.Enter */) {
                    showSelect = true;
                }
            }
            if (showSelect) {
                // Space, Enter, is used to expand select box, do not propagate it (prevent action bar action run)
                e.stopPropagation();
            }
        }));
    }
    get onDidSelect() {
        return this._onDidSelect.event;
    }
    setOptions(options, selected) {
        if (!this.options || !arrays.equals(this.options, options)) {
            this.options = options;
            this.selectElement.options.length = 0;
            this.options.forEach((option, index) => {
                this.selectElement.add(this.createOption(option.text, index, option.isDisabled));
            });
        }
        if (selected !== undefined) {
            this.select(selected);
        }
    }
    select(index) {
        if (this.options.length === 0) {
            this.selected = 0;
        }
        else if (index >= 0 && index < this.options.length) {
            this.selected = index;
        }
        else if (index > this.options.length - 1) {
            // Adjust index to end of list
            // This could make client out of sync with the select
            this.select(this.options.length - 1);
        }
        else if (this.selected < 0) {
            this.selected = 0;
        }
        this.selectElement.selectedIndex = this.selected;
        if ((this.selected < this.options.length) && typeof this.options[this.selected].text === 'string') {
            this.selectElement.title = this.options[this.selected].text;
        }
        else {
            this.selectElement.title = '';
        }
    }
    focus() {
        if (this.selectElement) {
            this.selectElement.tabIndex = 0;
            this.selectElement.focus();
        }
    }
    blur() {
        if (this.selectElement) {
            this.selectElement.tabIndex = -1;
            this.selectElement.blur();
        }
    }
    setFocusable(focusable) {
        this.selectElement.tabIndex = focusable ? 0 : -1;
    }
    render(container) {
        container.classList.add('select-container');
        container.appendChild(this.selectElement);
        this.setOptions(this.options, this.selected);
        this.applyStyles();
    }
    applyStyles() {
        // Style native select
        if (this.selectElement) {
            const background = this.styles.selectBackground ? this.styles.selectBackground.toString() : '';
            const foreground = this.styles.selectForeground ? this.styles.selectForeground.toString() : '';
            const border = this.styles.selectBorder ? this.styles.selectBorder.toString() : '';
            this.selectElement.style.backgroundColor = background;
            this.selectElement.style.color = foreground;
            this.selectElement.style.borderColor = border;
        }
    }
    createOption(value, index, disabled) {
        const option = document.createElement('option');
        option.value = value;
        option.text = value;
        option.disabled = !!disabled;
        return option;
    }
}
