// 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 {BoardSize, Color, otherColor, Move, N} from './base'

function getElement(id: string) {

return document.getElementById(id) as HTMLElement;

}

function querySelector(selector: string) {

return document.querySelector(selector) as HTMLElement;

}

function parseColor(color: string) {

let c = color[0].toLowerCase();

return c == 'b' ? Color.Black : Color.White;

}

function parseMove(gtpCoord: string): Move {

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);

if (row < 0 || row >= N || col < 0 || col > N) {

throw new Error(`Can't parse "${gtpCoord}" as a GTP coord`);

}

return {row: row, col: col};

}

function parseMoves(moveStrs: string[]): Move[] {

let moves: Move[] = [];

for (let str of moveStrs) {

moves.push(parseMove(str));

}

return moves;

}

function pixelRatio() {

return window.devicePixelRatio || 1;

}

function partialUpdate(src: any, dst: any, propNames: string[]) {

for (let name of propNames) {

if (src[name] != null) {

dst[name] = src[name];

}

}

return dst;

}

// Converts a result like "B+R" or "W+3.5" to a human-readable string like

// "Black wins by resignation" or "White wins by 3.5 points".

function toPrettyResult(result: string) {

let prettyResult: string;

if (result[0] == 'W') {

prettyResult = 'White wins by ';

} else {

prettyResult = 'Black wins by ';

}

if (result[2] == 'R') {

prettyResult += 'resignation';

} else {

prettyResult += result.substr(2) + ' points';

}

return prettyResult;

}

export {

getElement,

parseColor,

parseMove,

parseMoves,

partialUpdate,

pixelRatio,

querySelector,

toPrettyResult,

}