// Copyright 2018 Google LLC

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

// http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

import {Color, otherColor, Point, BoardSize} from './board'

function getElement(id: string) {

return document.getElementById(id) as HTMLElement;

}

function querySelector(selector: string) {

return document.querySelector(selector) as HTMLElement;

}

function parseGtpPoint(gtpCoord: string, N: BoardSize): Point | 'pass' | 'resign' {

if (gtpCoord == 'pass' || gtpCoord == 'resign') {

return gtpCoord;

}

let col = gtpCoord.charCodeAt(0) - 65;

if (col >= 8) {

--col;

}

let row = N - parseInt(gtpCoord.slice(1), 10);

return {row: row, col: col};

}

function parseVariation(str: string, N: BoardSize, toPlay: Color) {

if (str.trim() == '') {

return [];

}

let moves = str.split(' ');

let variation = [];

let color = toPlay;

for (let move of moves) {

let p = parseGtpPoint(move, N)

if (p != 'pass' && p != 'resign') {

variation.push({p: p, color: color});

}

color = otherColor(color);

}

return variation;

}

export {

getElement,

parseGtpPoint,

parseVariation,

querySelector,

}