#!/usr/bin/env python3
"""
build_fill_events.py — Decision A from the synthetic-data gap report.

Walks tests/multi-agent/scenarios/*.json (43 client-day scenarios) and
data/_playbook_lessons/*.json (64 retrospective outcomes) and emits a
single normalized fill_events.parquet at data/datasets/fill_events.parquet.

Pure deterministic normalization — no LLM, no new data. Each scenario
event becomes one row. Lesson outcomes augment scenario events with
success/fail counts where (client, date, city, state) matches.

Reproducibility: identical inputs → bit-identical output. event_id is
SHA1(client|date|role|at|city) truncated to 16 hex chars; rows are
sorted by event_id before write so re-runs produce the same parquet.
"""

import hashlib
import json
import sys
from datetime import datetime, timezone
from pathlib import Path

import pyarrow as pa
import pyarrow.parquet as pq

REPO = Path(__file__).resolve().parents[2]
SCENARIO_DIR = REPO / "tests" / "multi-agent" / "scenarios"
LESSONS_DIR = REPO / "data" / "_playbook_lessons"
OUT_PATH = REPO / "data" / "datasets" / "fill_events.parquet"


def event_id(client: str, date: str, role: str, at: str, city: str) -> str:
    h = hashlib.sha1(f"{client}|{date}|{role}|{at}|{city}".encode()).hexdigest()
    return h[:16]


def load_lessons() -> dict:
    """Returns map of (client, date) → outcome dict."""
    out: dict = {}
    for path in sorted(LESSONS_DIR.glob("*.json")):
        try:
            d = json.loads(path.read_text())
        except json.JSONDecodeError:
            continue
        client = d.get("client")
        date = d.get("date")
        if not client or not date:
            continue
        out[(client, date)] = {
            "outcome_events_total": d.get("events_total"),
            "outcome_events_ok": d.get("events_ok"),
            "outcome_checkpoint_count": d.get("checkpoint_count"),
            "outcome_model": d.get("model"),
            "outcome_cloud": d.get("cloud"),
            "outcome_lesson_path": str(path.relative_to(REPO)),
        }
    return out


def load_scenarios(lessons: dict) -> list[dict]:
    rows: list[dict] = []
    for path in sorted(SCENARIO_DIR.glob("scen_*.json")):
        try:
            d = json.loads(path.read_text())
        except json.JSONDecodeError:
            continue
        client = d.get("client")
        date = d.get("date")
        contract = d.get("contract") or {}
        events = d.get("events") or []
        if not client or not date or not events:
            continue
        outcome = lessons.get((client, date), {})
        for event in events:
            role = event.get("role") or ""
            at = event.get("at") or ""
            city = event.get("city") or ""
            state = event.get("state") or ""
            rows.append({
                "event_id": event_id(client, date, role, at, city),
                "source_file": str(path.relative_to(REPO)),
                "source_kind": "scenario",
                "client": client,
                "date": date,
                "city": city,
                "state": state,
                "role": role,
                "count": int(event.get("count") or 0),
                "kind": event.get("kind") or "",
                "at": at,
                "shift_start": event.get("shift_start") or "",
                "contract_deadline": contract.get("deadline"),
                "contract_budget_per_hour_max": contract.get("budget_per_hour_max"),
                "contract_local_bonus_per_hour": contract.get("local_bonus_per_hour"),
                "contract_local_bonus_radius_mi": contract.get("local_bonus_radius_mi"),
                "contract_fill_requirement": contract.get("fill_requirement"),
                "outcome_events_total": outcome.get("outcome_events_total"),
                "outcome_events_ok": outcome.get("outcome_events_ok"),
                "outcome_checkpoint_count": outcome.get("outcome_checkpoint_count"),
                "outcome_model": outcome.get("outcome_model"),
                "outcome_cloud": outcome.get("outcome_cloud"),
                "outcome_lesson_path": outcome.get("outcome_lesson_path"),
            })
    return rows


def main() -> int:
    lessons = load_lessons()
    rows = load_scenarios(lessons)
    if not rows:
        print("no rows produced — scenario dir empty?", file=sys.stderr)
        return 1
    rows.sort(key=lambda r: r["event_id"])

    schema = pa.schema([
        ("event_id", pa.string()),
        ("source_file", pa.string()),
        ("source_kind", pa.string()),
        ("client", pa.string()),
        ("date", pa.string()),
        ("city", pa.string()),
        ("state", pa.string()),
        ("role", pa.string()),
        ("count", pa.int32()),
        ("kind", pa.string()),
        ("at", pa.string()),
        ("shift_start", pa.string()),
        ("contract_deadline", pa.string()),
        ("contract_budget_per_hour_max", pa.int32()),
        ("contract_local_bonus_per_hour", pa.int32()),
        ("contract_local_bonus_radius_mi", pa.int32()),
        ("contract_fill_requirement", pa.string()),
        ("outcome_events_total", pa.int32()),
        ("outcome_events_ok", pa.int32()),
        ("outcome_checkpoint_count", pa.int32()),
        ("outcome_model", pa.string()),
        ("outcome_cloud", pa.bool_()),
        ("outcome_lesson_path", pa.string()),
    ])
    table = pa.Table.from_pylist(rows, schema=schema)

    OUT_PATH.parent.mkdir(parents=True, exist_ok=True)
    pq.write_table(table, OUT_PATH, compression="snappy")

    matched = sum(1 for r in rows if r["outcome_events_total"] is not None)
    print(f"fill_events.parquet written: {OUT_PATH.relative_to(REPO)}")
    print(f"  rows: {len(rows)}")
    print(f"  scenarios: {len({r['source_file'] for r in rows})}")
    print(f"  with outcome: {matched}")
    print(f"  unique (client,date): {len({(r['client'], r['date']) for r in rows})}")
    print(f"  generated_at: {datetime.now(timezone.utc).isoformat(timespec='seconds')}")
    return 0


if __name__ == "__main__":
    sys.exit(main())