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import { Song } from "../types/song";
import { GuessState, GuessType } from "../types/guess";
const SALT = import.meta.env.VITE_HEARDLE_SALT ?? "changeme";
const API_URL = import.meta.env.VITE_HEARDLE_API_URL ?? "http://localhost:3001";
function hexToBytes(hex: string): Uint8Array {
const bytes = new Uint8Array(hex.length / 2);
for (let i = 0; i < hex.length; i += 2) {
bytes[i / 2] = parseInt(hex.slice(i, i + 2), 16);
}
return bytes;
}
function xor(data: Uint8Array, key: Uint8Array): Uint8Array {
const output = new Uint8Array(data.length);
for (let i = 0; i < data.length; i++) {
output[i] = data[i] ^ key[i % key.length];
}
return output;
}
function getObfuscationKey(date = new Date().toISOString().split("T")[0]): Uint8Array {
return new TextEncoder().encode(SALT + date);
}
function decryptResponse(data: string, date?: string): Song {
const obfuscationKey = getObfuscationKey(date);
const obfuscatedBytes = hexToBytes(data);
const decrypted = xor(obfuscatedBytes, obfuscationKey);
return JSON.parse(new TextDecoder().decode(decrypted)) as Song;
}
export interface DailySolution {
date: string;
song: Song;
sessionToken: string;
initialSig: string;
}
export interface DailyGameState {
date: string;
currentTry: number;
didGuess: boolean;
guesses: GuessType[];
}
interface SongGuessPayload {
artist: string;
name: string;
}
interface SubmitDailyGuessRequest {
sessionToken: string;
state: DailyGameState;
sig: string;
guess?: SongGuessPayload | null;
}
interface SubmitDailyGuessResponse {
state: DailyGameState;
sig: string;
guessState: GuessState;
}
export async function getDailySolution(): Promise<DailySolution> {
const solutionData = await fetch(`${API_URL}/today`);
if (!solutionData.ok) {
throw new Error(`Failed to fetch solution: ${solutionData.statusText}`);
}
const { data, date, sessionToken, initialSig } = await solutionData.json();
return {
date,
sessionToken,
initialSig,
song: decryptResponse(data, date),
};
}
export async function submitDailyGuess(
payload: SubmitDailyGuessRequest
): Promise<SubmitDailyGuessResponse> {
const response = await fetch(`${API_URL}/guess`, {
method: "POST",
headers: {
"Content-Type": "application/json",
},
body: JSON.stringify(payload),
});
if (!response.ok) {
throw new Error(`Failed to submit guess: ${response.statusText}`);
}
return (await response.json()) as SubmitDailyGuessResponse;
}
export async function getSelectSolution(): Promise<Song> {
const solutionData = await fetch(`${API_URL}/select`);
if (!solutionData.ok) {
throw new Error(`Failed to fetch solution: ${solutionData.statusText}`);
}
const { data } = await solutionData.json();
return decryptResponse(data);
}
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