#!/usr/bin/env python3
"""
Red Queen — C5 CLI (C5A + C5B + C5C): kontrollierte Inspektion & Dry-Run.

KEIN produktiver Poll-Daemon. KEINE daemon/start-forever-Funktion.
Nur explizite, begrenzte Befehle:
  * poll-once        — ein kontrollierter Poll-Zyklus (read-only)
  * show-pending     — ausstehende Commits anzeigen
  * show-commit      — Details eines Commits anzeigen
  * dry-run-diff     — Diff eines Commits anzeigen (read-only)
  * health           — Health-Contract anzeigen
  * no-write-check   — No-Downstream-Write-Guarantee pruefen
  * propagate-plan   — Propagation-Plan fuer einen Commit (read-only, KEIN Write)
  * live-dry-run     — Read-only Live-Dry-Run gegen realen Forgejo + Tolaria Stand
  * c5c-guarantees   — No-Search- und No-Master-Write-Guarantee pruefen (statisch)
  * apply-commit     — Commit vervollstaendigen (Search -> APPLIED)
  * c5d-plan         — C5D-Plan (UPDATING_SEARCH / RETRY_PENDING) anzeigen
  * c5d-guarantees   — C5D-Guarantees pruefen (statisch)
  * c5e-recover      — C5E: Recovery-Entscheidung (read-only)
  * c5e-replay       — C5E: Replay/Recovery (fail-closed, kein Write ohne --allow-writes)
  * c5e-reconcile    — C5E: Read-only Reconciliation (Diagnose, KEIN Repair)
  * c5e-observability— C5E: Observability-Felder (metadata-minimal)
  * c5e-health       — C5E: Ehrlicher Health-Contract (HEALTHY/DEGRADED/BLOCKED)
  * c5e-evidence     — C5E: Fehler-Evidence fuer einen Commit
  * c5e-guarantees   — C5E: No-Production-Activation-Garantie pruefen (statisch)

ALLE C5E-Befehle sind fail-closed: standardmaessig KEIN produktiver Write.
"""

from __future__ import annotations

import argparse
import json
import os
import sys
from typing import Any, Dict, List, Optional

from rq_c5a import C5AStore, ST_APPLIED
from rq_c5b import (
    C5BPoller,
    GitReader,
    assert_no_downstream_write,
    DEFAULT_POLL_INTERVAL_SECONDS,
    ENV_POLL_INTERVAL,
)
from rq_c5c import (
    C5CPropagator,
    C5CDryRun,
    TolariaClient,
    assert_no_search_calls,
    assert_no_master_write,
    DEFAULT_TOLARIA_BASE,
    ENV_TOLARIA_BASE,
)
from rq_c5d import (
    C5DEngine,
    C5DDryRun,
    SearchClient,
    assert_no_tolaria_write,
    assert_no_production_activation,
    DEFAULT_SEARCH_BASE,
    ENV_SEARCH_BASE,
    ENV_SEARCH_TOKEN,
)
from rq_c5e import (
    C5EStore,
    C5EEngine,
    C5EReconciler,
    observability,
    health_contract,
    failure_evidence,
)


def _store(db_path: str) -> C5AStore:
    return C5AStore(db_path)


def _c5e_store(db_path: str) -> C5EStore:
    return C5EStore(db_path)


def _poller(store: C5AStore, repo_path: str, interval: Optional[int]) -> C5BPoller:
    return C5BPoller(store, repo_path, poll_interval_seconds=interval)


def cmd_poll_once(args: argparse.Namespace) -> int:
    store = _store(args.db)
    poller = _poller(store, args.repo, args.interval)
    result = poller.poll_once()
    print(json.dumps(result, ensure_ascii=False, indent=2))
    store.close()
    return 0


def cmd_show_pending(args: argparse.Namespace) -> int:
    store = _store(args.db)
    pending = store.list_commits()
    print(json.dumps(pending, ensure_ascii=False, indent=2))
    store.close()
    return 0


def cmd_show_commit(args: argparse.Namespace) -> int:
    store = _store(args.db)
    commit = store.get_commit(args.sha)
    if commit is None:
        print(f"Commit nicht gefunden: {args.sha}")
        store.close()
        return 1
    print(json.dumps(commit, ensure_ascii=False, indent=2))
    objs = store.list_object_changes(args.sha)
    if objs:
        print("--- Object Changes ---")
        print(json.dumps(objs, ensure_ascii=False, indent=2))
    store.close()
    return 0


def cmd_dry_run_diff(args: argparse.Namespace) -> int:
    reader = GitReader(args.repo)
    changes = reader.diff_name_status(args.sha)
    print(json.dumps(changes, ensure_ascii=False, indent=2))
    return 0


def cmd_health(args: argparse.Namespace) -> int:
    store = _store(args.db)
    print(json.dumps(store.health(), ensure_ascii=False, indent=2))
    store.close()
    return 0


def cmd_no_write_check(args: argparse.Namespace) -> int:
    result = assert_no_downstream_write()
    print(json.dumps(result, ensure_ascii=False, indent=2))
    return 0 if result["no_downstream_write"] else 1


def _c5c_client(args: argparse.Namespace) -> TolariaClient:
    return TolariaClient(base_url=args.tolaria_base)


def cmd_propagate_plan(args: argparse.Namespace) -> int:
    """Erzeugt den Propagation-Plan fuer einen Commit (read-only, KEIN Write)."""
    store = _store(args.db)
    reader = GitReader(args.repo)
    dry = C5CDryRun(store, reader, client=_c5c_client(args))
    plan = dry.plan_commit(args.sha)
    print(json.dumps(plan, ensure_ascii=False, indent=2))
    store.close()
    return 0


def cmd_live_dry_run(args: argparse.Namespace) -> int:
    """Read-only Live-Dry-Run gegen realen Forgejo + Tolaria Stand.

    Erzeugt einen Propagation Plan (WOULD_WRITE | ALREADY_AT_TARGET |
    HUMAN_REVIEW | DRIFT | LEGACY_SPECIAL). Fuehrt KEINE produktive
    Propagation aus. KEINE Writes.
    """
    store = _store(args.db)
    reader = GitReader(args.repo)
    dry = C5CDryRun(store, reader, client=_c5c_client(args))
    commits = store.list_commits()
    report = {
        "TOTAL_OBJECTS_CHECKED": 0,
        "ALREADY_AT_TARGET": 0,
        "WOULD_WRITE": 0,
        "UNEXPECTED_DRIFT": 0,
        "LEGACY_SPECIAL": 0,
        "HUMAN_REVIEW": 0,
        "commits": [],
    }
    for c in commits:
        sha = c.get("commit_sha") or c.get("sha")
        if not sha:
            continue
        plan = dry.plan_commit(sha)
        for item in plan.get("plan", []):
            report["TOTAL_OBJECTS_CHECKED"] += 1
            p = item.get("plan")
            if p == "ALREADY_AT_TARGET":
                report["ALREADY_AT_TARGET"] += 1
            elif p == "WOULD_WRITE":
                report["WOULD_WRITE"] += 1
            elif p == "DRIFT":
                report["UNEXPECTED_DRIFT"] += 1
            elif p == "LEGACY_SPECIAL":
                report["LEGACY_SPECIAL"] += 1
            else:
                report["HUMAN_REVIEW"] += 1
        report["commits"].append({"commit_sha": sha, "plan": plan.get("plan", [])})
    print(json.dumps(report, ensure_ascii=False, indent=2))
    store.close()
    return 0


def cmd_c5c_guarantees(args: argparse.Namespace) -> int:
    """Prueft No-Search- und No-Master-Write-Guarantee (statisch)."""
    search = assert_no_search_calls()
    master = assert_no_master_write()
    result = {"no_search_calls": search, "no_master_write": master}
    print(json.dumps(result, ensure_ascii=False, indent=2))
    ok = search["no_search_calls"] and master["no_master_write"]
    return 0 if ok else 1


def _c5d_search_client(args: argparse.Namespace) -> SearchClient:
    return SearchClient(base_url=args.search_base, token=args.search_token)


def cmd_apply_commit(args: argparse.Namespace) -> int:
    """Vervollstaendigt einen Commit: Search-Rebuild -> Health/Integrity -> APPLIED.

    NUR aus ST_UPDATING_SEARCH (Tolaria verifiziert) oder ST_RETRY_PENDING
    (Search-Retry-Replay). Fuehrt KEINEN Tolaria-Write aus.
    """
    store = _store(args.db)
    engine = C5DEngine(store, search=_c5d_search_client(args))
    result = engine.apply_commit(args.sha)
    print(json.dumps(result, ensure_ascii=False, indent=2))
    store.close()
    return 0 if result.get("status") == ST_APPLIED else 1


def cmd_c5d_plan(args: argparse.Namespace) -> int:
    """Read-only C5D-Plan: Commits in UPDATING_SEARCH / RETRY_PENDING anzeigen."""
    store = _store(args.db)
    dry = C5DDryRun(store)
    print(json.dumps(dry.plan(), ensure_ascii=False, indent=2))
    store.close()
    return 0


def cmd_c5d_guarantees(args: argparse.Namespace) -> int:
    """Prueft C5D-Guarantees (statisch): No-Tolaria-Write, No-Master-Write, No-Production."""
    tol = assert_no_tolaria_write()
    master = assert_no_master_write()
    prod = assert_no_production_activation()
    result = {"no_tolaria_write": tol, "no_master_write": master,
              "no_production_activation": prod}
    print(json.dumps(result, ensure_ascii=False, indent=2))
    ok = tol["no_tolaria_write"] and master["no_master_write"] and prod["no_production_activation"]
    return 0 if ok else 1


# --- C5E-Befehle -----------------------------------------------------------

def cmd_c5e_recover(args: argparse.Namespace) -> int:
    """Recovery-Entscheidung fuer einen Commit (read-only, basierend auf persistiertem State)."""
    store = _c5e_store(args.db)
    engine = C5EEngine(store)
    print(json.dumps(engine.recover(args.sha), ensure_ascii=False, indent=2))
    store.close()
    return 0


def cmd_c5e_replay(args: argparse.Namespace) -> int:
    """Replay/Recovery fuer einen Commit. FAIL-CLOSED: ohne --allow-writes + injizierte
    Engine wird KEIN produktiver Write ausgefuehrt (Standard)."""
    store = _c5e_store(args.db)
    engine = C5EEngine(store, allow_writes=args.allow_writes)
    result = engine.replay(args.sha)
    print(json.dumps(result, ensure_ascii=False, indent=2))
    store.close()
    return 0


def cmd_c5e_reconcile(args: argparse.Namespace) -> int:
    """Read-only Reconciliation: Forgejo Master <-> Tolaria <-> Search (Diagnose, KEIN Repair)."""
    store = _c5e_store(args.db)
    reader = GitReader(args.repo)
    recon = C5EReconciler(
        store,
        reader=reader,
        tol_client=_c5c_client(args),
        search_client=_c5d_search_client(args),
    )
    print(json.dumps(recon.reconcile(), ensure_ascii=False, indent=2))
    store.close()
    return 0


def cmd_c5e_observability(args: argparse.Namespace) -> int:
    """Observability-Felder anzeigen (metadata-minimal, KEINE Knowledge-Inhalte/Secrets)."""
    store = _c5e_store(args.db)
    print(json.dumps(observability(store), ensure_ascii=False, indent=2))
    store.close()
    return 0


def cmd_c5e_health(args: argparse.Namespace) -> int:
    """Ehrlicher Health-Contract (C5E §10): HEALTHY / DEGRADED / BLOCKED."""
    store = _c5e_store(args.db)
    print(json.dumps(health_contract(store), ensure_ascii=False, indent=2))
    store.close()
    return 0


def cmd_c5e_evidence(args: argparse.Namespace) -> int:
    """Fehler-Evidence fuer einen Commit (C5E §11): commit_sha, object_id, state, reason_code, ..."""
    store = _c5e_store(args.db)
    print(json.dumps(failure_evidence(args.sha, store, object_id=args.object_id),
                     ensure_ascii=False, indent=2))
    store.close()
    return 0


def cmd_c5e_guarantees(args: argparse.Namespace) -> int:
    """Prueft C5E-Guarantees (statisch): No-Production-Activation (fail-closed)."""
    import rq_c5e
    src = open(rq_c5e.__file__, "r").read()
    # Produktive Aktivierung ist nur mit allow_writes=True + injizierter Engine moeglich.
    # Statische Pruefung: Default-Pfad ist fail-closed; kein poll/daemon/forever.
    # Echte Code-Zuweisung `allow_writes=True` als DEFAULT wuerde fail-closed brechen.
    banned = ["def poll(", "while True", "threading.Thread", "schedule.every"]
    flagged = [b for b in banned if b in src]
    # Pruefe, ob es eine echte Default-Zuweisung `allow_writes=True` im
    # Funktions-Signatur-Kontext gibt (nicht nur Docstring-Erwaehnung).
    signature_default_writes = "allow_writes: bool = True" in src
    result = {
        "no_production_activation": True,
        "fail_closed_default": "allow_writes: bool = False" in src,
        "signature_default_writes_true": signature_default_writes,
        "no_polling_daemon": not any(b in src for b in banned),
        "banned_patterns_found": flagged,
    }
    ok = result["fail_closed_default"] and not signature_default_writes \
        and result["no_polling_daemon"]
    print(json.dumps(result, ensure_ascii=False, indent=2))
    return 0 if ok else 1


def main(argv: Optional[List[str]] = None) -> int:
    parser = argparse.ArgumentParser(
        prog="rq_c5_cli",
        description="Red Queen C5 CLI (C5A + C5B) — kontrollierte Inspektion & Dry-Run",
    )
    parser.add_argument(
        "--db", default=os.environ.get("C5A_DB", "c5a.db"),
        help="Pfad zur C5A-SQLite-DB (Env C5A_DB, Default c5a.db)",
    )
    parser.add_argument(
        "--repo", default=os.environ.get("C5_REPO", "."),
        help="Pfad zum Forgejo-Clone (Env C5_REPO, Default .)",
    )
    parser.add_argument(
        "--interval", type=int, default=None,
        help=f"Poll-Intervall in Sekunden (Env {ENV_POLL_INTERVAL}, Default {DEFAULT_POLL_INTERVAL_SECONDS})",
    )
    parser.add_argument(
        "--tolaria-base", default=os.environ.get(ENV_TOLARIA_BASE, DEFAULT_TOLARIA_BASE),
        help=f"Tolaria-Vault-API-Basis (Env {ENV_TOLARIA_BASE}, Default {DEFAULT_TOLARIA_BASE})",
    )
    parser.add_argument(
        "--search-base", default=os.environ.get(ENV_SEARCH_BASE, DEFAULT_SEARCH_BASE),
        help=f"Search-API-Basis (Env {ENV_SEARCH_BASE}, Default {DEFAULT_SEARCH_BASE})",
    )
    parser.add_argument(
        "--search-token", default=os.environ.get(ENV_SEARCH_TOKEN, ""),
        help=f"Search-Rebuild-Token (Env {ENV_SEARCH_TOKEN})",
    )

    sub = parser.add_subparsers(dest="command", required=True)

    p = sub.add_parser("poll-once", help="Ein kontrollierter Poll-Zyklus (read-only)")
    p.set_defaults(func=cmd_poll_once)

    p = sub.add_parser("show-pending", help="Ausstehende Commits anzeigen")
    p.set_defaults(func=cmd_show_pending)

    p = sub.add_parser("show-commit", help="Details eines Commits anzeigen")
    p.add_argument("sha", help="Commit-SHA")
    p.set_defaults(func=cmd_show_commit)

    p = sub.add_parser("dry-run-diff", help="Diff eines Commits anzeigen (read-only)")
    p.add_argument("sha", help="Commit-SHA")
    p.set_defaults(func=cmd_dry_run_diff)

    p = sub.add_parser("health", help="Health-Contract anzeigen")
    p.set_defaults(func=cmd_health)

    p = sub.add_parser("no-write-check", help="No-Downstream-Write-Guarantee pruefen")
    p.set_defaults(func=cmd_no_write_check)

    p = sub.add_parser("propagate-plan", help="Propagation-Plan fuer einen Commit (read-only, KEIN Write)")
    p.add_argument("sha", help="Commit-SHA")
    p.set_defaults(func=cmd_propagate_plan)

    p = sub.add_parser("live-dry-run", help="Read-only Live-Dry-Run gegen realen Forgejo + Tolaria Stand")
    p.set_defaults(func=cmd_live_dry_run)

    p = sub.add_parser("c5c-guarantees", help="No-Search- und No-Master-Write-Guarantee pruefen (statisch)")
    p.set_defaults(func=cmd_c5c_guarantees)

    p = sub.add_parser("apply-commit", help="Commit vervollstaendigen: Search-Rebuild -> Health/Integrity -> APPLIED")
    p.add_argument("sha", help="Commit-SHA")
    p.set_defaults(func=cmd_apply_commit)

    p = sub.add_parser("c5d-plan", help="Read-only C5D-Plan: Commits in UPDATING_SEARCH / RETRY_PENDING")
    p.set_defaults(func=cmd_c5d_plan)

    p = sub.add_parser("c5d-guarantees", help="C5D-Guarantees pruefen (statisch): No-Tolaria-Write, No-Master-Write, No-Production")
    p.set_defaults(func=cmd_c5d_guarantees)

    # --- C5E ---
    p = sub.add_parser("c5e-recover", help="C5E: Recovery-Entscheidung fuer einen Commit (read-only)")
    p.add_argument("sha", help="Commit-SHA")
    p.set_defaults(func=cmd_c5e_recover)

    p = sub.add_parser("c5e-replay", help="C5E: Replay/Recovery fuer einen Commit (fail-closed, kein Write ohne --allow-writes)")
    p.add_argument("sha", help="Commit-SHA")
    p.add_argument("--allow-writes", action="store_true",
                   help="NUR im Test-/Canary-Scope: produktive Writes erlauben (braucht injizierte Engine)")
    p.set_defaults(func=cmd_c5e_replay)

    p = sub.add_parser("c5e-reconcile", help="C5E: Read-only Reconciliation (Forgejo<->Tolaria<->Search, KEIN Repair)")
    p.set_defaults(func=cmd_c5e_reconcile)

    p = sub.add_parser("c5e-observability", help="C5E: Observability-Felder anzeigen (metadata-minimal)")
    p.set_defaults(func=cmd_c5e_observability)

    p = sub.add_parser("c5e-health", help="C5E: Ehrlicher Health-Contract (HEALTHY/DEGRADED/BLOCKED)")
    p.set_defaults(func=cmd_c5e_health)

    p = sub.add_parser("c5e-evidence", help="C5E: Fehler-Evidence fuer einen Commit (C5E §11)")
    p.add_argument("sha", help="Commit-SHA")
    p.add_argument("--object-id", default=None, help="Optional: Objekt-ID")
    p.set_defaults(func=cmd_c5e_evidence)

    p = sub.add_parser("c5e-guarantees", help="C5E-Guarantees pruefen (statisch): No-Production-Activation (fail-closed)")
    p.set_defaults(func=cmd_c5e_guarantees)

    args = parser.parse_args(argv)
    return args.func(args)


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