#!/usr/bin/env python3
"""Daily decision sync and security report, with per-recipient delivery checkpoints.

Dry-run by default. --apply is the scheduled mode. No credentials are stored.
"""
import argparse
import fcntl
import json
from pathlib import Path
import subprocess
import sys
from urllib.request import Request, urlopen

from security_flow_report import DEFAULT_REPOS

SCRIPTS = Path(__file__).resolve().parent


def notifications(report, state, agent, founder):
    pending = []
    ready = {key: report[key] for key in ("READY", "UNBLOCKED")}
    if ready != state.get("agent"):
        pending.append(("agent", agent, ready))
    # ATTENDED is the daily operator reminder; empty lists never message the founder.
    if report["ATTENDED"]:
        pending.append(("founder", founder, {"ATTENDED": report["ATTENDED"]}))
    return pending


def post(hub, recipient, payload):
    body = {"from_agent": "the-custodian", "to_agent": recipient,
            "subject": "Daily security flow", "body": json.dumps(payload, sort_keys=True)}
    request = Request(hub.rstrip("/") + "/messages/", data=json.dumps(body).encode(),
                      headers={"Content-Type": "application/json"}, method="POST")
    with urlopen(request, timeout=30) as response:
        return json.load(response)["id"]


def save(path, data):
    temporary = path.with_suffix(path.suffix + ".tmp")
    temporary.write_text(json.dumps(data, indent=2) + "\n")
    temporary.replace(path)


def main():
    parser = argparse.ArgumentParser(description=__doc__)
    parser.add_argument("--root", default=str(Path.home()))
    parser.add_argument("--repos", default=",".join(dict.fromkeys(["the-custodian", *DEFAULT_REPOS])))
    parser.add_argument("--hub", default="http://127.0.0.1:8000")
    parser.add_argument("--agent", default="the-custodian")
    parser.add_argument("--founder", default="human")
    parser.add_argument("--state-dir", type=Path, default=Path.home() / ".local/state/custodian-security-flow")
    parser.add_argument("--apply", action="store_true")
    args = parser.parse_args()
    args.state_dir.mkdir(parents=True, exist_ok=True)
    with (args.state_dir / "run.lock").open("w") as lock:
        fcntl.flock(lock, fcntl.LOCK_EX | fcntl.LOCK_NB)
        command = [sys.executable, str(SCRIPTS / "sync_resolved_decisions.py"),
                   "--root", args.root, "--hub", args.hub]
        subprocess.run(command + (["--apply"] if args.apply else []), check=True)
        raw = subprocess.check_output([sys.executable, str(SCRIPTS / "security_flow_report.py"),
            "--root", args.root, "--repos", args.repos, "--json"], text=True)
        report = json.loads(raw)
        state_path = args.state_dir / "delivery.json"
        state = json.loads(state_path.read_text()) if state_path.exists() else {}
        save(args.state_dir / "report.json", report)
        for key, recipient, payload in notifications(report, state, args.agent, args.founder):
            if not args.apply:
                print(json.dumps({"dry_run": True, "to_agent": recipient, "report": payload}))
                continue
            message_id = post(args.hub, recipient, payload)
            state[key] = payload
            state[key + "_message_id"] = message_id
            save(state_path, state)  # A later recipient failure does not replay earlier sends.
        print(raw)


if __name__ == "__main__":
    main()