#!/usr/bin/env python3
"""
verify_db.py — Vérification exhaustive des données dans ClickHouse après génération de trafic

Vérifie que toutes les couches de données attendues sont présentes :
  - L3/L4 : TTL, MSS, window_size, df_bit
  - TLS/L5 : ja4, sni, alpn, version
  - L7 HTTP : method, path, status_code, duration_ms, header_order_signature
  - Corrélation : correlated=1 (L3+L7), correlated=0 (L7 seul)
  - Keep-alives : requêtes multiplexées sur une même connexion TCP
  - HTTP/2 : tls_alpn='h2' ou h2_settings_count > 0
  - HTTP plain : lignes sans TLS (port 80)

Usage:
  python verify_db.py [--host clickhouse] [--port 9000]
                      [--db-logs ja4_logs] [--db-processing ja4_processing]
                      [--min-rows 10]
"""

import argparse
import sys
import time

# ---------------------------------------------------------------------------
# Client ClickHouse léger (HTTP interface port 8123)
# ---------------------------------------------------------------------------
import urllib.parse
import urllib.request
import json


def ch_query(host: str, port: int, query: str) -> list:
    """Envoie une requête SELECT à ClickHouse via HTTP (port 8123) et retourne les lignes."""
    url = f"http://{host}:{port}/?query={urllib.parse.quote(query + ' FORMAT JSON')}"
    try:
        with urllib.request.urlopen(url, timeout=10) as resp:
            data = json.loads(resp.read())
            return data.get("data", [])
    except Exception as e:
        return [{"__error__": str(e)}]


def ch_scalar(host: str, port: int, query: str) -> str:
    """Retourne la première colonne de la première ligne."""
    rows = ch_query(host, port, query)
    if not rows or "__error__" in rows[0]:
        return str(rows[0].get("__error__", "?"))
    return str(list(rows[0].values())[0])


# ---------------------------------------------------------------------------
# Checks
# ---------------------------------------------------------------------------
CHECK_OK = "✅"
CHECK_FAIL = "❌"
CHECK_WARN = "⚠️ "

results: list = []


def check(name: str, query: str, host: str, port: int, expect_nonzero: bool = True,
          min_val: int = 1, warn_only: bool = False) -> bool:
    val = ch_scalar(host, port, query)
    try:
        n = int(float(val))
    except ValueError:
        n = -1

    ok = n >= min_val if expect_nonzero else n == 0
    icon = CHECK_OK if ok else (CHECK_WARN if warn_only else CHECK_FAIL)
    results.append((icon, name, val))
    return ok


def run_checks(host: str, http_port: int, db_logs: str, db_processing: str, min_rows: int):
    print(f"\n{'='*65}")
    print(f"  Vérification ClickHouse — {db_logs} / {db_processing}")
    print(f"{'='*65}\n")

    # ------------------------------------------------------------------
    # 1. Tables brutes
    # ------------------------------------------------------------------
    print("── 1. Tables brutes ─────────────────────────────────────────")

    check("http_logs_raw : lignes totales",
          f"SELECT count() FROM {db_logs}.http_logs_raw", host, http_port, min_val=min_rows)

    check("http_logs : lignes après MV",
          f"SELECT count() FROM {db_logs}.http_logs", host, http_port, min_val=min_rows)

    # ------------------------------------------------------------------
    # 2. Métadonnées L3/L4
    # ------------------------------------------------------------------
    print("\n── 2. Métadonnées L3/L4 ─────────────────────────────────────")

    check("ip_meta_ttl > 0 (TTL capturé)",
          f"SELECT count() FROM {db_logs}.http_logs WHERE ip_meta_ttl > 0",
          host, http_port, min_val=1)

    check("tcp_meta_mss > 0 (MSS capturé)",
          f"SELECT count() FROM {db_logs}.http_logs WHERE tcp_meta_mss > 0",
          host, http_port, min_val=1)

    check("tcp_meta_window_size > 0 (window_size capturé)",
          f"SELECT count() FROM {db_logs}.http_logs WHERE tcp_meta_window_size > 0",
          host, http_port, min_val=1)

    check("src_port renseigné (> 1000)",
          f"SELECT count() FROM {db_logs}.http_logs WHERE src_port > 1000",
          host, http_port, min_val=1)

    # ------------------------------------------------------------------
    # 3. TLS / JA4
    # ------------------------------------------------------------------
    print("\n── 3. TLS / JA4 ─────────────────────────────────────────────")

    check("ja4 renseigné (fingerprint TLS)",
          f"SELECT count() FROM {db_logs}.http_logs WHERE ja4 != ''",
          host, http_port, min_val=1)

    check("tls_sni renseigné (SNI extrait)",
          f"SELECT count() FROM {db_logs}.http_logs WHERE tls_sni != ''",
          host, http_port, min_val=1)

    check("tls_version TLSv1.2 présente",
          f"SELECT count() FROM {db_logs}.http_logs WHERE tls_version = 'TLSv1.2'",
          host, http_port, min_val=1, warn_only=True)

    check("tls_version TLSv1.3 présente",
          f"SELECT count() FROM {db_logs}.http_logs WHERE tls_version = 'TLSv1.3'",
          host, http_port, min_val=1)

    check("tls_alpn h2 (HTTP/2 négocié)",
          f"SELECT count() FROM {db_logs}.http_logs WHERE tls_alpn = 'h2'",
          host, http_port, min_val=1, warn_only=True)

    # ja4 format : t12d... ou t13d... selon la version TLS
    check("ja4 TLS1.2 (commence par t12)",
          f"SELECT count() FROM {db_logs}.http_logs WHERE startsWith(ja4, 't12')",
          host, http_port, min_val=1, warn_only=True)

    check("ja4 TLS1.3 (commence par t13)",
          f"SELECT count() FROM {db_logs}.http_logs WHERE startsWith(ja4, 't13')",
          host, http_port, min_val=1)

    # ------------------------------------------------------------------
    # 4. Couche L7 HTTP
    # ------------------------------------------------------------------
    print("\n── 4. Couche L7 HTTP ────────────────────────────────────────")

    for method in ("GET", "POST", "PUT", "DELETE", "HEAD", "OPTIONS", "PATCH"):
        check(f"méthode {method} présente",
              f"SELECT count() FROM {db_logs}.http_logs WHERE method = '{method}'",
              host, http_port, min_val=1)

    check("path renseigné",
          f"SELECT count() FROM {db_logs}.http_logs WHERE path != ''",
          host, http_port, min_val=1)

    check("status_code 200 présent",
          f"SELECT count() FROM {db_logs}.http_logs WHERE status_code = 200",
          host, http_port, min_val=1)

    check("status_code 404 présent (requêtes de test)",
          f"SELECT count() FROM {db_logs}.http_logs WHERE status_code IN (400,404,405,500)",
          host, http_port, min_val=1, warn_only=True)

    check("duration_ms > 0 (latence mesurée)",
          f"SELECT count() FROM {db_logs}.http_logs WHERE duration_ms > 0",
          host, http_port, min_val=1)

    check("header_order_signature renseigné",
          f"SELECT count() FROM {db_logs}.http_logs WHERE header_order_signature != ''",
          host, http_port, min_val=1)

    # ------------------------------------------------------------------
    # 5. Corrélation L3+L7
    # ------------------------------------------------------------------
    print("\n── 5. Corrélation L3 ↔ L7 ───────────────────────────────────")

    check("correlated=1 (lignes L3+L7 fusionnées)",
          f"SELECT count() FROM {db_logs}.http_logs WHERE correlated = 1",
          host, http_port, min_val=1)

    check("correlated=0 (HTTP sans corr. réseau, port 80)",
          f"SELECT count() FROM {db_logs}.http_logs WHERE correlated = 0",
          host, http_port, min_val=1, warn_only=True)

    pct_corr = ch_scalar(host, http_port,
        f"SELECT round(100*countIf(correlated=1)/count(), 1) FROM {db_logs}.http_logs")
    results.append((CHECK_OK, f"taux corrélation ({pct_corr}%)", pct_corr))

    # ------------------------------------------------------------------
    # 6. Keep-alives (TCP multiplexing)
    # ------------------------------------------------------------------
    print("\n── 6. Keep-alives ────────────────────────────────────────────")

    check("keepalives > 1 (connexions multiplexées)",
          f"SELECT count() FROM {db_logs}.http_logs WHERE keepalives > 1",
          host, http_port, min_val=1, warn_only=True)

    max_ka = ch_scalar(host, http_port,
        f"SELECT max(keepalives) FROM {db_logs}.http_logs")
    results.append((CHECK_OK, f"max keepalives ({max_ka})", max_ka))

    # ------------------------------------------------------------------
    # 7. Diversité des IPs sources
    # ------------------------------------------------------------------
    print("\n── 7. Diversité sources ─────────────────────────────────────")

    check("IPs sources distinctes >= 5",
          f"SELECT uniqExact(src_ip) FROM {db_logs}.http_logs",
          host, http_port, min_val=5, warn_only=True)

    # ------------------------------------------------------------------
    # 8. Tables de traitement (ja4_processing)
    # ------------------------------------------------------------------
    print("\n── 8. Tables processing ─────────────────────────────────────")

    for tbl in ("agg_host_ip_ja4_1h", "agg_header_fingerprint_1h",
                "agg_ip_behavior_1h", "agg_request_timing_1h"):
        check(f"{tbl} peuplée",
              f"SELECT count() FROM {db_processing}.{tbl}",
              host, http_port, min_val=1, warn_only=True)

    # ------------------------------------------------------------------
    # Résumé
    # ------------------------------------------------------------------
    print(f"\n{'='*65}")
    fails = 0
    warns = 0
    for icon, name, val in results:
        print(f"  {icon}  {name:<50s} {val}")
        if icon == CHECK_FAIL:
            fails += 1
        elif icon == CHECK_WARN:
            warns += 1

    total = len(results)
    passed = total - fails - warns
    print(f"\n{'='*65}")
    print(f"  Résultat : {passed} OK  |  {warns} WARN  |  {fails} FAIL  (total {total})")
    print(f"{'='*65}\n")

    return fails == 0


def main():
    parser = argparse.ArgumentParser(description="Vérification ClickHouse post-trafic")
    parser.add_argument("--host", default="clickhouse", help="Hôte ClickHouse")
    parser.add_argument("--port", type=int, default=8123, help="Port HTTP ClickHouse (8123)")
    parser.add_argument("--db-logs", default="ja4_logs", help="Base de données logs")
    parser.add_argument("--db-processing", default="ja4_processing", help="Base processing")
    parser.add_argument("--min-rows", type=int, default=10, help="Minimum de lignes attendues")
    parser.add_argument("--wait", type=int, default=5,
                        help="Attendre N secondes avant de vérifier (flush MV)")
    args = parser.parse_args()

    if args.wait > 0:
        print(f"[verify_db] Attente {args.wait}s pour le flush des Materialized Views...")
        time.sleep(args.wait)

    ok = run_checks(args.host, args.port, args.db_logs, args.db_processing, args.min_rows)
    sys.exit(0 if ok else 1)


if __name__ == "__main__":
    main()