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import { SessionState, GAME_SIZE, PADDLE_WIDTH, GameState } from "../state";
import readline from "node:readline";
import {
clearTerminal,
getCurrentTerminalSize,
RENDER_GAME_SIZE,
RENDER_STATE_SIZE,
} from "./utils";
let lastTermSize: ReturnType<typeof getCurrentTerminalSize> | undefined;
let lastRender: { seqno: number; time: number } = {
seqno: 0,
time: Date.now(),
};
export const renderGameState = (gameState: GameState): string[] => {
let rows: string[] = [];
for (let row = -1; row < GAME_SIZE.rows + 1; row++) {
let rowOut: string = " ";
if (row === -1) {
rowOut = rowOut.concat("--".repeat(GAME_SIZE.cols + 2));
} else {
for (let col = -1; col < GAME_SIZE.cols + 1; col++) {
if (col === -1 || col === GAME_SIZE.cols) {
rowOut = rowOut.concat("||");
} else {
const [paddleX, paddleY] = gameState.paddle.position;
const paddleXMin = paddleX;
const paddleXMax = paddleX + PADDLE_WIDTH;
const ballPositions = gameState.balls.map(({ position }) => position);
const brickPositions = gameState.bricks.map(
({ position }) => position
);
const hasPaddle =
col >= paddleXMin && col <= paddleXMax && row === paddleY;
const firstBall = ballPositions.find(
([ballX, ballY]) =>
col === Math.round(ballX) && row === Math.round(ballY)
);
const hasBrick = brickPositions.some(
([brickX, brickY]) => col === brickX && row === brickY
);
if (hasPaddle) {
rowOut = rowOut.concat("##");
} else if (firstBall) {
const fx = firstBall[0] - Math.round(firstBall[0]);
let chars;
if (fx < 0) {
chars = "O ";
} else {
chars = " O";
}
rowOut = rowOut.concat(chars);
} else if (hasBrick) {
rowOut = rowOut.concat("▒▒");
} else {
rowOut = rowOut.concat(" ");
}
}
}
}
rows.push(rowOut);
}
return rows;
};
export const renderState = (sessionState: SessionState) => {
const rl = new readline.promises.Readline(process.stdout, {
autoCommit: true,
});
rl.cursorTo(0, 0);
const termSize = getCurrentTerminalSize();
if (
lastTermSize &&
(lastTermSize.cols !== termSize.cols || lastTermSize.rows !== termSize.rows)
) {
clearTerminal();
}
lastTermSize = termSize;
if (
termSize.cols < RENDER_STATE_SIZE.cols ||
termSize.rows < RENDER_STATE_SIZE.rows
) {
process.stdout.write("Please increase the screen size");
return;
}
const marginCols = termSize.cols - RENDER_STATE_SIZE.cols;
const marginRows = (termSize.rows - RENDER_STATE_SIZE.rows) / 2;
let allOut: string = "\n".repeat(marginRows);
const localDisplay = renderGameState(sessionState.localPlayerGameState);
const remoteDisplay =
sessionState.remotePlayerGameState &&
renderGameState(sessionState.remotePlayerGameState);
const timeNow = Date.now();
const infoHeader = `Frame: ${sessionState.seqno}
Session: ${sessionState.sessionId}
Fps: ${(
((sessionState.seqno - lastRender.seqno) / (timeNow - lastRender.time)) *
1000
).toFixed(0)}\n`;
if (remoteDisplay) {
allOut = allOut
.concat(infoHeader)
.concat(" ".repeat(marginCols / 2))
.concat(`LOCAL:`)
.concat(" ".repeat(RENDER_GAME_SIZE.cols))
.concat(" ".repeat(4))
.concat(`REMOTE:`)
.concat("\n");
localDisplay.forEach(
(row, i) =>
(allOut = allOut
.concat(" ".repeat(marginCols / 2))
.concat(row)
.concat(" ".repeat(8))
.concat(remoteDisplay[i])
.concat(" ".repeat(marginCols / 2))
.concat("\n"))
);
} else {
allOut = allOut.concat(infoHeader).concat("\n");
localDisplay.forEach(
(row, i) =>
(allOut = allOut
.concat(" ".repeat(marginCols / 2 + 4))
.concat(row)
.concat(" ".repeat(marginCols / 2 + 4))
.concat("\n"))
);
}
process.stdout.write(allOut);
lastRender = { seqno: sessionState.seqno, time: timeNow };
};
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