"""`monky-deployd run [--once] [--prune]` · `status [--json]` · `bootstrap` · `version`."""

from __future__ import annotations

import argparse
import json
import logging
import os
import random
import signal
import sys
import time
from pathlib import Path

from monky_deployd import __version__
from monky_deployd import state as statemod
from monky_deployd.config import DEFAULT_CONFIG_PATH, Config, ConfigError, load
from monky_deployd.redact import install as install_redactor

EX_OK, EX_FAIL, EX_TEMPFAIL, EX_ENV_MISMATCH = 0, 1, 75, 78
_PRIO = {"DEBUG": 7, "INFO": 6, "WARNING": 4, "ERROR": 3, "CRITICAL": 2}


class _JournalFormatter(logging.Formatter):
    """sd-daemon priority prefix; journald strips it and files the level (no timestamp: journald has one)."""

    def format(self, record: logging.LogRecord) -> str:
        return f"<{_PRIO.get(record.levelname, 6)}>{record.name}: {record.getMessage()}"


def setup_logging(level: str = "INFO") -> None:
    root = logging.getLogger()
    root.handlers.clear()
    h = logging.StreamHandler(sys.stderr)
    if os.environ.get("JOURNAL_STREAM"):
        h.setFormatter(_JournalFormatter())
    else:
        h.setFormatter(logging.Formatter("%(asctime)s %(levelname)s %(name)s: %(message)s"))
    root.addHandler(h)
    root.setLevel(getattr(logging, level.upper(), logging.INFO))
    install_redactor(root)


def _load(args) -> Config:
    cfg = load(args.config)
    if args.verbose:
        cfg.log_level = "DEBUG"
    return cfg


def cmd_run(args) -> int:
    cfg = _load(args)
    setup_logging(cfg.log_level)
    from monky_deployd.agent import Agent

    if args.once:
        return Agent(cfg, prune=args.prune).run_once()
    stop = {"now": False}

    def _sig(*_):
        stop["now"] = True

    signal.signal(signal.SIGTERM, _sig)
    signal.signal(signal.SIGINT, _sig)
    log = logging.getLogger("monky-deployd")
    log.info("loop mode (interval %ss%s)", cfg.interval_s, ", laptop" if cfg.laptop_mode else "")
    rc = EX_OK
    while not stop["now"]:
        rc = Agent(cfg, prune=args.prune).run_once()
        if rc == EX_ENV_MISMATCH:
            return rc  # no retry storm
        delay = cfg.interval_s + random.uniform(0, min(10, cfg.interval_s / 6))
        for _ in range(int(delay)):
            if stop["now"]:
                break
            time.sleep(1)
    return rc


def cmd_bootstrap(args) -> int:
    cfg = _load(args)
    setup_logging(cfg.log_level)
    from monky_deployd.agent import Agent, NoCredentials
    from monky_deployd.bao import BaoError
    from monky_deployd.tenancy import EnvMismatch
    from monky_deployd.transport import TransportError

    agent = Agent(cfg)
    if cfg.token_path.exists() and not args.force:
        print(f"already bootstrapped ({cfg.token_path} exists); use --force to log in again")
        return EX_OK
    if args.force:
        statemod.delete(cfg.token_path)
    try:
        agent.state = statemod.load(cfg.state_path, cfg.env_id)
        agent._ensure_token()
        statemod.save(cfg.state_path, agent.state)
    except TransportError as exc:
        print(f"network: {exc}", file=sys.stderr)
        return EX_TEMPFAIL
    except EnvMismatch as exc:
        print(f"AGENT_ENV_MISMATCH: {exc.detail}", file=sys.stderr)
        return EX_ENV_MISMATCH
    except (NoCredentials, BaoError) as exc:
        print(f"bootstrap failed: {exc}", file=sys.stderr)
        return EX_FAIL
    print(f"bootstrapped: token stored at {cfg.token_path} (accessor {agent.state.token.accessor})")
    return EX_OK


def _fmt_ts(ts: float | None) -> str:
    if not ts:
        return "-"
    return time.strftime("%Y-%m-%dT%H:%M:%SZ", time.gmtime(ts)) + f" ({int(time.time() - ts)}s ago)"


def cmd_status(args) -> int:
    cfg = _load(args)
    st = statemod.load(cfg.state_path, cfg.env_id)
    token_present = cfg.token_path.exists()
    bootstrap_present = Path(cfg.bootstrap_path).exists()
    current = Path(cfg.deploy_dir) / "current"
    containers: list[dict] = []
    try:
        from monky_deployd.compose import Compose, Docker

        d = Docker(cfg.docker_bin)
        if d.available() and current.exists():
            containers = [c.as_dict() for c in Compose(d, current, cfg.compose_project).ps()]
    except Exception:  # status must never crash on docker trouble
        containers = []
    healthy = bool(containers) and all(
        c["state"] == "running" and c["health"] in ("", "healthy", "none") for c in containers
    )
    out = {
        "env_id": cfg.env_id,
        "site": cfg.site,
        "transport": cfg.transport,
        "agent_version": __version__,
        "laptop_mode": cfg.laptop_mode,
        "token_present": token_present,
        "bootstrap_grant_present": bootstrap_present,
        "token": {"accessor": st.token.accessor, "issued_at": st.token.issued_at, "source": st.token.source},
        "applied_sha": st.applied_sha,
        "desired_sha": st.desired_sha,
        "in_sync": bool(st.applied_sha) and st.applied_sha == st.desired_sha,
        "last_checkin_at": st.last_checkin_at,
        "last_report_at": st.last_report_at,
        "last_action": st.last_action,
        "last_result": st.last_result,
        "last_error": st.last_error,
        "current_release": os.path.realpath(current) if current.exists() else None,
        "containers": containers,
        "healthy": healthy,
    }
    if args.json:
        print(json.dumps(out, indent=2, sort_keys=True))
        return EX_OK
    print(
        f"monky-deployd {__version__} — {cfg.env_id} ({cfg.site}, transport {cfg.transport}{', laptop' if cfg.laptop_mode else ''})"
    )
    print(
        f"  credentials : token {'present' if token_present else 'ABSENT'}"
        f"{' (accessor ' + st.token.accessor + ')' if st.token.accessor else ''}"
        f"{'; bootstrap grant waiting' if bootstrap_present else ''}"
    )
    print(f"  applied sha : {st.applied_sha or '-'}")
    print(f"  desired sha : {st.desired_sha or '-'}   {'in sync' if out['in_sync'] else 'NOT in sync'}")
    print(f"  last checkin: {_fmt_ts(st.last_checkin_at)}  action={st.last_action or '-'}")
    print(f"  last report : {_fmt_ts(st.last_report_at)}  result={st.last_result or '-'}")
    if st.last_error:
        print(f"  last error  : {st.last_error}")
    print(f"  release     : {out['current_release'] or '-'}")
    if containers:
        print(f"  containers  : {'healthy' if healthy else 'UNHEALTHY'}")
        for c in containers:
            print(f"    - {c['name']}: {c['state']} {c['health'] or ''}".rstrip())
    else:
        print("  containers  : none (docker unavailable or nothing deployed)")
    return EX_OK if (token_present and (out["in_sync"] or not st.desired_sha)) else EX_FAIL


def cmd_version(_args) -> int:
    print(__version__)
    return EX_OK


def build_parser() -> argparse.ArgumentParser:
    p = argparse.ArgumentParser(prog="monky-deployd", description="Monky backend pull agent (ADR-0028)")
    p.add_argument("-c", "--config", default=os.environ.get("MONKY_DEPLOYD_CONFIG", DEFAULT_CONFIG_PATH))
    p.add_argument("-v", "--verbose", action="store_true")
    sub = p.add_subparsers(dest="cmd", required=True)
    r = sub.add_parser("run", help="reconcile: --once for the timer/oneshot, otherwise loop")
    r.add_argument("--once", action="store_true")
    r.add_argument(
        "--prune", action="store_true", help="after a successful apply, drop old releases + docker image prune"
    )
    r.set_defaults(fn=cmd_run)
    s = sub.add_parser("status", help="what this box has applied vs what tenancy wants")
    s.add_argument("--json", action="store_true")
    s.set_defaults(fn=cmd_status)
    b = sub.add_parser("bootstrap", help="log in to OpenBao with the install kit's grant; store the token")
    b.add_argument("--force", action="store_true")
    b.set_defaults(fn=cmd_bootstrap)
    sub.add_parser("version").set_defaults(fn=cmd_version)
    return p


def main(argv: list[str] | None = None) -> int:
    args = build_parser().parse_args(argv)
    try:
        return int(args.fn(args))
    except ConfigError as exc:
        print(f"config error: {exc}", file=sys.stderr)
        return EX_ENV_MISMATCH if "env_id" in str(exc) else EX_FAIL
    except KeyboardInterrupt:
        return 130