"""One-command end-to-end demo (plan §3):

stock drop -> A2A hand-off -> negotiations -> best deal -> AP2 mandate ->
human approves (dashboard or scripts/decide.py) -> PO write-back -> confirmation.

Run:  python -m scripts.run_demo [--sku SEED-MAIZE-01] [--auto-approve]
"""
from __future__ import annotations

import argparse
import asyncio
import json
import sys
from pathlib import Path

sys.path.insert(0, str(Path(__file__).resolve().parent.parent))

from core.events import EventBus  # noqa: E402
from orchestrator.gate import run_gate  # noqa: E402
from orchestrator.pipeline import run_pipeline  # noqa: E402


async def main() -> None:
    parser = argparse.ArgumentParser()
    parser.add_argument("--sku", default=None)
    parser.add_argument("--auto-approve", action="store_true",
                        help="testing only: approve without a human (CI/self-test)")
    parser.add_argument("--run-id", default=None,
                        help="fix the run id (the dashboard uses this to follow live)")
    parser.add_argument("--live-lock-token", default=None,
                        help=argparse.SUPPRESS)
    args = parser.parse_args()

    bus = EventBus(args.run_id)
    print(f"[demo] run_id = {bus.run_id}")
    print(f"[demo] events -> traces/{bus.run_id}.jsonl")

    try:
        result = await run_pipeline(bus, sku=args.sku)
    finally:
        # The shared provider slot protects only the API-heavy pipeline. Once
        # the mandate exists, each visitor can wait at their own human gate.
        if args.live_lock_token:
            from core.hosted_runtime import release_live_slot
            release_live_slot(args.live_lock_token)
    if result["status"] != "winner_selected":
        print(f"[demo] pipeline ended early: {result['status']}")
        return

    if args.auto_approve:
        from core.config import traces_dir
        (traces_dir() / f"{bus.run_id}.decision.json").write_text(
            json.dumps({"decision": "approve"}), encoding="utf-8")

    print("[demo] waiting at the human gate — open the dashboard "
          "(streamlit run ui/app.py) or run: python -m scripts.decide "
          f"--run {bus.run_id} approve")
    outcome = await run_gate(bus, result)
    print(f"[demo] outcome: {json.dumps(outcome, indent=2)}")


if __name__ == "__main__":
    asyncio.run(main())