import React from "react";
import {Group, Line} from "react-konva";
import {GRID_COLOR} from "../../../util/colors";
import {GRID_LINE_WIDTH_IN_PIXELS, MAP_SIZE, MAP_SIZE_IN_PIXELS, TILE_SIZE_IN_PIXELS} from "../MapConstants";

const MAP_COORDINATE_ENTRIES = Array.from(new Array(MAP_SIZE), (x, i) => i);
const HORIZONTAL_POINT_PAIRS = MAP_COORDINATE_ENTRIES.map(index => [
    0, index * TILE_SIZE_IN_PIXELS,
    MAP_SIZE_IN_PIXELS, index * TILE_SIZE_IN_PIXELS
]);
const VERTICAL_POINT_PAIRS = MAP_COORDINATE_ENTRIES.map(index => [
    index * TILE_SIZE_IN_PIXELS, 0,
    index * TILE_SIZE_IN_PIXELS, MAP_SIZE_IN_PIXELS
]);

const GridGroup = () => (
    <Group>
        {HORIZONTAL_POINT_PAIRS.concat(VERTICAL_POINT_PAIRS).map((points, index) => (
            <Line
                key={index}
                points={points}
                stroke={GRID_COLOR}
                strokeWidth={GRID_LINE_WIDTH_IN_PIXELS}
                listening={false}
            />
        ))}
    </Group>
);

export default GridGroup;