"""Protocol-faithful stand-in for server-py/sidecar.py (no faster-whisper).

Used by tests/transcribe.test.ts to exercise the real Bun-side supervisor
(createSidecar) against an actual child process. Behavior is keyed off the
requested model name:

  "ok"              two segments (the second reports the audio byte count,
                    language and task for pass-through assertions), then done
  "boom"            an error line
  "die"             exit(1) mid-request (crash simulation)
  "wait-for-cancel" one segment, then block until the next stdin line
                    (the cancel), then done {cancelled: true}
"""

import json
import os
import sys


def emit(message):
    sys.stdout.write(json.dumps(message) + "\n")
    sys.stdout.flush()


emit({"type": "ready", "version": "fake"})

for line in sys.stdin:
    line = line.strip()
    if not line:
        continue
    message = json.loads(line)
    kind = message.get("type")
    if kind == "shutdown":
        break
    if kind != "transcribe":
        continue

    request_id = message.get("id")
    model = message.get("model")
    if model == "boom":
        emit({"type": "error", "id": request_id, "message": "kaboom"})
    elif model == "die":
        sys.exit(1)
    elif model == "wait-for-cancel":
        emit({"type": "segment", "id": request_id, "start": 0.0, "end": 1.0,
              "text": " before cancel"})
        next_line = json.loads(sys.stdin.readline())
        cancelled = (next_line.get("type") == "cancel"
                     and next_line.get("id") == request_id)
        emit({"type": "done", "id": request_id, "cancelled": cancelled})
    else:
        size = os.path.getsize(message["audio_path"])
        emit({"type": "segment", "id": request_id, "start": 0.0, "end": 1.5,
              "text": " Hello"})
        emit({"type": "segment", "id": request_id, "start": 1.5, "end": 3.0,
              "text": " world. [model=%s bytes=%d lang=%s task=%s]"
              % (model, size, message.get("language"), message.get("task"))})
        emit({"type": "done", "id": request_id, "cancelled": False})