import { execFileSync } from "child_process";
import { readFileSync } from "fs";
import { fileURLToPath } from "url";
import { dirname, join } from "path";

const __dirname = dirname(fileURLToPath(import.meta.url));
const promptName = process.argv[2];

if (!promptName) {
  console.error("Usage: node scheduler.js <prompt-name>");
  process.exit(1);
}

const prompts = JSON.parse(readFileSync(join(__dirname, "prompts.json"), "utf-8"));
const config = prompts.find((p) => p.name === promptName);

if (!config) {
  console.error(`Prompt "${promptName}" not found.`);
  process.exit(1);
}

// Pick a random time in the window
const windowMinutes = (config.endHour - config.startHour) * 60;
const delayMinutes = Math.floor(Math.random() * windowMinutes);
const hours = Math.floor(delayMinutes / 60) + config.startHour;
const minutes = delayMinutes % 60;

const pad = (n) => String(n).padStart(2, "0");
console.log(`[${promptName}] Scheduled for ${pad(hours)}:${pad(minutes)} PST`);

const now = new Date(
  new Date().toLocaleString("en-US", { timeZone: "America/Los_Angeles" })
);
const target = new Date(now);
target.setHours(hours, minutes, 0, 0);

let delayMs = target.getTime() - now.getTime();
if (delayMs <= 0) {
  console.log("Target time passed. Posting now.");
  delayMs = 0;
}

console.log(`Waiting ${Math.round(delayMs / 60000)} minutes...`);

setTimeout(() => {
  try {
    execFileSync("node", [join(__dirname, "bot.js"), promptName], { stdio: "inherit" });
  } catch {
    process.exit(1);
  }
}, delayMs);