/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/
'use strict';

import 'vs/css!./findInput';

import * as nls from 'vs/nls';
import * as dom from 'vs/base/browser/dom';
import {IMessage as InputBoxMessage, IInputValidator, InputBox} from 'vs/base/browser/ui/inputbox/inputBox';
import {Checkbox} from 'vs/base/browser/ui/checkbox/checkbox';
import {IContextViewProvider} from 'vs/base/browser/ui/contextview/contextview';
import {Widget} from 'vs/base/browser/ui/widget';
import Event, {Emitter} from 'vs/base/common/event';
import {StandardKeyboardEvent} from 'vs/base/browser/keyboardEvent';

export interface IFindInputOptions {
	placeholder?:string;
	width?:number;
	validation?:IInputValidator;
	label:string;

	appendCaseSensitiveLabel?: string;
	appendWholeWordsLabel?: string;
	appendRegexLabel?: string;
}

const NLS_REGEX_CHECKBOX_LABEL = nls.localize('regexDescription', "Use Regular Expression");
const NLS_WHOLE_WORD_CHECKBOX_LABEL = nls.localize('wordsDescription', "Match Whole Word");
const NLS_CASE_SENSITIVE_CHECKBOX_LABEL = nls.localize('caseDescription', "Match Case");
const NLS_DEFAULT_LABEL = nls.localize('defaultLabel', "input");

export class FindInput extends Widget {

	static OPTION_CHANGE:string = 'optionChange';

	private contextViewProvider: IContextViewProvider;
	private width:number;
	private placeholder:string;
	private validation:IInputValidator;
	private label:string;

	private regex:Checkbox;
	private wholeWords:Checkbox;
	private caseSensitive:Checkbox;
	public domNode: HTMLElement;
	public inputBox:InputBox;

	private _onDidOptionChange = this._register(new Emitter<void>());
	public onDidOptionChange: Event<void> = this._onDidOptionChange.event;

	private _onKeyDown = this._register(new Emitter<StandardKeyboardEvent>());
	public onKeyDown: Event<StandardKeyboardEvent> = this._onKeyDown.event;

	private _onKeyUp = this._register(new Emitter<StandardKeyboardEvent>());
	public onKeyUp: Event<StandardKeyboardEvent> = this._onKeyUp.event;

	private _onCaseSensitiveKeyDown = this._register(new Emitter<StandardKeyboardEvent>());
	public onCaseSensitiveKeyDown: Event<StandardKeyboardEvent> = this._onCaseSensitiveKeyDown.event;

	constructor(parent:HTMLElement, contextViewProvider: IContextViewProvider, options?:IFindInputOptions) {
		super();
		this.contextViewProvider = contextViewProvider;
		this.width = options.width || 100;
		this.placeholder = options.placeholder || '';
		this.validation = options.validation;
		this.label = options.label || NLS_DEFAULT_LABEL;

		this.regex = null;
		this.wholeWords = null;
		this.caseSensitive = null;
		this.domNode = null;
		this.inputBox = null;

		this.buildDomNode(options.appendCaseSensitiveLabel || '', options.appendWholeWordsLabel || '', options.appendRegexLabel || '');

		if(Boolean(parent)) {
			parent.appendChild(this.domNode);
		}

		this.onkeydown(this.inputBox.inputElement, (e) => this._onKeyDown.fire(e));
		this.onkeyup(this.inputBox.inputElement, (e) => this._onKeyUp.fire(e));
	}

	public enable(): void {
		dom.removeClass(this.domNode, 'disabled');
		this.inputBox.enable();
		this.regex.enable();
		this.wholeWords.enable();
		this.caseSensitive.enable();
	}

	public disable(): void {
		dom.addClass(this.domNode, 'disabled');
		this.inputBox.disable();
		this.regex.disable();
		this.wholeWords.disable();
		this.caseSensitive.disable();
	}

	public clear(): void {
		this.clearValidation();
		this.setValue('');
		this.focus();
	}

	public setWidth(newWidth:number): void {
		this.width = newWidth;
		this.domNode.style.width = this.width + 'px';
		this.contextViewProvider.layout();
		this.setInputWidth();
	}

	public getValue(): string {
		return this.inputBox.value;
	}

	public setValue(value:string): void {
		if (this.inputBox.value !== value) {
			this.inputBox.value = value;
		}
	}

	public select(): void {
		this.inputBox.select();
	}

	public focus(): void {
		this.inputBox.focus();
	}

	public getCaseSensitive():boolean {
		return this.caseSensitive.checked;
	}

	public setCaseSensitive(value:boolean): void {
		this.caseSensitive.checked = value;
		this.setInputWidth();
	}

	public getWholeWords():boolean {
		return this.wholeWords.checked;
	}

	public setWholeWords(value:boolean): void {
		this.wholeWords.checked = value;
		this.setInputWidth();
	}

	public getRegex():boolean {
		return this.regex.checked;
	}

	public setRegex(value:boolean): void {
		this.regex.checked = value;
		this.setInputWidth();
	}

	public focusOnCaseSensitive(): void {
		this.caseSensitive.focus();
	}

	private setInputWidth(): void {
		let w = this.width - this.caseSensitive.width() - this.wholeWords.width() - this.regex.width();
		this.inputBox.width = w;
	}

	private buildDomNode(appendCaseSensitiveLabel:string, appendWholeWordsLabel: string, appendRegexLabel: string): void {
		this.domNode = document.createElement('div');
		this.domNode.style.width = this.width + 'px';
		dom.addClass(this.domNode, 'monaco-findInput');

		this.inputBox = this._register(new InputBox(this.domNode, this.contextViewProvider, {
			placeholder: this.placeholder || '',
			ariaLabel: this.label || '',
			validationOptions: {
				validation: this.validation || null,
				showMessage: true
			}
		}));

		this.regex = this._register(new Checkbox({
			actionClassName: 'regex',
			title: NLS_REGEX_CHECKBOX_LABEL + appendRegexLabel,
			isChecked: false,
			onChange: () => {
				this._onDidOptionChange.fire();
				this.inputBox.focus();
				this.setInputWidth();
				this.validate();
			}
		}));
		this.wholeWords = this._register(new Checkbox({
			actionClassName: 'whole-word',
			title: NLS_WHOLE_WORD_CHECKBOX_LABEL + appendWholeWordsLabel,
			isChecked: false,
			onChange: () => {
				this._onDidOptionChange.fire();
				this.inputBox.focus();
				this.setInputWidth();
				this.validate();
			}
		}));
		this.caseSensitive = this._register(new Checkbox({
			actionClassName: 'case-sensitive',
			title: NLS_CASE_SENSITIVE_CHECKBOX_LABEL + appendCaseSensitiveLabel,
			isChecked: false,
			onChange: () => {
				this._onDidOptionChange.fire();
				this.inputBox.focus();
				this.setInputWidth();
				this.validate();
			},
			onKeyDown: (e) => {
				this._onCaseSensitiveKeyDown.fire(e);
			}
		}));
		this.setInputWidth();

		let controls = document.createElement('div');
		controls.className = 'controls';
		controls.appendChild(this.caseSensitive.domNode);
		controls.appendChild(this.wholeWords.domNode);
		controls.appendChild(this.regex.domNode);

		this.domNode.appendChild(controls);
	}

	public validate(): void {
		this.inputBox.validate();
	}

	public showMessage(message: InputBoxMessage): void {
		this.inputBox.showMessage(message);
	}

	public clearMessage(): void {
		this.inputBox.hideMessage();
	}

	private clearValidation(): void {
		this.inputBox.hideMessage();
	}
}