// Name: Watch Screen Captures for MP4
// Description: Watches ~/Documents/Screen Captures for new .mp4 files and runs 'transcribe-locally-with-parakeet' on each new file.
// Author: tayiorbeii
// GitHub: tayiorbeii

import "@johnlindquist/kit"
import chokidar from "chokidar"

const watchDir = home("Documents", "Screen Captures")
await ensureDir(watchDir)

const pattern = path.join(watchDir, "*.mp4")
const processed = new Set<string>()

const watcher = chokidar.watch(pattern, {
  ignoreInitial: true,
  awaitWriteFinish: { stabilityThreshold: 2000, pollInterval: 250 },
})

watcher.on("add", async addedPath => {
  try {
    if (processed.has(addedPath)) return
    processed.add(addedPath)

    // small delay to ensure filesystem settled
    await wait(500)

    const latest = await getLatestMp4(watchDir)
    if (!latest) return

    await run("transcribe-locally-with-parakeet", latest)
  } catch (err) {
    console.error(err)
  }
})

await hide()

async function getLatestMp4(dir: string): Promise<string | null> {
  const entries = await readdir(dir)
  const mp4s = entries.filter(n => n.toLowerCase().endsWith(".mp4"))
  if (!mp4s.length) return null

  let latestPath = ""
  let latestTime = -1

  for (const name of mp4s) {
    const full = path.join(dir, name)
    const stats = await stat(full)
    const mtime = stats.mtimeMs
    if (mtime > latestTime) {
      latestTime = mtime
      latestPath = full
    }
  }

  return latestPath || null
}