#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
wiki_importer.py – v2.3.8

Ziel dieses Patches: Die Felder `discipline`, `execution`, `keywords`, `equipment`, `duration_minutes` usw.
kommen bei dir teilweise leer an. Ursache sind zu aggressive Normalisierungen/Matcher.

Fix (konservativ & robust):
- Parser liest jetzt **gezielt** die bekannten Templates **ohne** Over-Normalisierung:
  • `{{ÜbungInfoBox}}` / `{{UebungInfoBox}}`
  • `{{Übungsbeschreibung}}` / `{{Uebungsbeschreibung}}`
  • `{{Hilfsmittel}}`
  • `{{SkillDevelopment}}`
- Feld-Extraktion nutzt **zuerst die exakten Wiki-Parameternamen** (deutsch/mit Umlauten),
  erst danach schmale Synonym-Fallbacks. Das stellt sicher, dass z. B. `Schlüsselworte=`
  wirklich in `keywords` landet.
- `imported_at` wird bei **Create und Update** gesetzt.
- Optionales Debugging: `--debug-raw` druckt die gefundenen Raw-Keys (einfach, nachvollziehbar).

Bestehende API-Endpunkte bleiben unverändert.
"""

import os
import sys
import argparse
from typing import Dict, Any, Tuple, Optional, List
import requests
import mwparserfromhell
from dotenv import load_dotenv
import hashlib
import json
import time

# ----- Konfiguration / Defaults -----
load_dotenv()
API_BASE_URL    = os.getenv("API_BASE_URL", "http://localhost:8000/import/wiki")
EXERCISE_API    = os.getenv("EXERCISE_API_URL", "http://localhost:8000/exercise")
DEFAULT_CAT     = os.getenv("WIKI_CATEGORY", "Übungen")
DEFAULT_TITLE   = os.getenv("WIKI_EXERCISE_TITLE", "Affenklatschen")
REQUEST_TIMEOUT = int(os.getenv("REQUEST_TIMEOUT", "60"))

# ----- Helpers für Wiki-Router -----

def wiki_health() -> None:
    r = requests.get(f"{API_BASE_URL}/health", timeout=15)
    r.raise_for_status()
    print("[Sanity] Wiki health OK")


def wiki_login(username: str, password: str) -> None:
    payload = {"username": username, "password": password}
    r = requests.post(f"{API_BASE_URL}/login", json=payload, timeout=30)
    try:
        data = r.json()
    except Exception:
        print(f"[Login] HTTP {r.status_code}: {r.text}")
        r.raise_for_status()
    status = (data or {}).get("status")
    if status != "success":
        msg = (data or {}).get("message", "Login fehlgeschlagen")
        raise RuntimeError(f"[Login] {msg}")
    print("[Login] success")


def fetch_all_pages(category: str) -> Dict[str, Any]:
    resp = requests.get(f"{API_BASE_URL}/semantic/pages", params={"category": category}, timeout=REQUEST_TIMEOUT)
    resp.raise_for_status()
    return resp.json()


def fetch_page_info(title: str) -> Dict[str, Any]:
    r = requests.get(f"{API_BASE_URL}/info", params={"title": title}, timeout=30)
    r.raise_for_status()
    info = r.json()
    return {"pageid": info.get("pageid"), "fullurl": info.get("fullurl")}

# ----- Parser (konservativ) -----

T_INFOS    = {"ÜbungInfoBox", "UebungInfoBox"}
T_BESCHR   = {"Übungsbeschreibung", "Uebungsbeschreibung"}
T_HILFS    = {"Hilfsmittel"}
T_SKILL    = {"SkillDevelopment"}


def parse_exercise(title: str, pageid: int) -> Dict[str, Any]:
    print(f"[Parse] Lade '{title}' (ID={pageid})")
    resp = requests.get(
        f"{API_BASE_URL}/parsepage",
        params={"pageid": pageid, "title": title},
        timeout=REQUEST_TIMEOUT,
    )
    resp.raise_for_status()
    wikitext = resp.json().get("wikitext", "")
    wikicode = mwparserfromhell.parse(wikitext)

    raw: Dict[str, Any] = {"title": title, "source": "MediaWiki", "pageid": pageid, "wikitext": wikitext}

    for tpl in wikicode.filter_templates():
        name = str(tpl.name).strip()
        if name in T_INFOS or name in T_BESCHR or name in T_HILFS:
            for p in tpl.params:
                key = str(p.name).strip()
                val = str(p.value).strip()
                raw[key] = val
        elif name in T_SKILL:
            raw.setdefault("capabilities", [])
            def _getp(t, k):
                try:
                    return str(t.get(k).value).strip()
                except Exception:
                    return ""
            cap = _getp(tpl, "PrimaryCapability")
            lvl = _getp(tpl, "CapabilityLevel")
            try:
                lvl_i = int(lvl)
            except Exception:
                lvl_i = 0
            if cap:
                raw["capabilities"].append({"capability": cap, "level": lvl_i})

    return raw

# ----- Fingerprint (stabil, wie zuvor) -----

def _normalize(v: Any) -> str:
    if v is None:
        return ""
    if isinstance(v, (list, tuple)):
        return ",".join(_normalize(x) for x in v)
    if isinstance(v, dict):
        return json.dumps(v, sort_keys=True, ensure_ascii=False)
    return str(v).strip()


def _norm_text(s: str) -> str:
    if s is None:
        return ""
    s = str(s).replace("\u00a0", " ")
    s = " ".join(s.split())
    return s.strip()


def _canon_title(t: str) -> str:
    t = (t or "").strip().replace("_", " ")
    return t.replace("–", "-").replace("—", "-")


def compute_fingerprint(payload: Dict[str, Any]) -> str:
    kws = payload.get("keywords") or []
    kws = [k.replace("\u2013", "-").replace("\u2014", "-") for k in kws]
    kws = sorted({(k or "").strip() for k in kws if (k or "").strip()}, key=str.casefold)
    dur = payload.get("duration_minutes") or 0
    try:
        dur = int(round(float(dur)))
    except Exception:
        dur = 0
    fields = [
        _canon_title(payload.get("title", "")),
        _norm_text(payload.get("summary", "")),
        _norm_text(payload.get("execution", "")),
        _norm_text(payload.get("notes", "")),
        dur,
        payload.get("capabilities", {}),
        kws,
    ]
    base = "|".join(_normalize(f) for f in fields)
    return hashlib.sha256(base.encode("utf-8")).hexdigest()

# ----- Payload (exakte DE-Keys zuerst, dann schmale Fallbacks) -----

EXACT_KEYS = {
    "summary": ["Summary", "Kurzbeschreibung"],
    "execution": ["Durchführung", "Durchfuehrung", "Ablauf"],
    "duration": ["Dauer", "Zeit"],
    "keywords": ["Schlüsselworte", "Schlüsselwörter", "Schluesselworte", "Schluesselwoerter", "Keywords", "Tags"],
    "equipment_prim": ["Hilfsmittel"],
    "equipment_alt": ["Geräte", "Geraete", "Gerät", "Geraet", "Material"],
    "discipline": ["Übungstyp", "Uebungstyp", "Disziplin"],
    "group": ["Gruppengröße", "Gruppengroesse", "Group"],
    "age_group": ["Altersgruppe"],
    "target_group": ["Zielgruppe"],
    "purpose": ["Ziel", "Zweck"],
    "notes": ["Hinweise", "Notes"],
    "preparation": ["Vorbereitung", "RefMethode"],
    "method": ["Methode", "Method"],
}


def _first_any(raw: Dict[str, Any], keys: List[str]) -> Optional[str]:
    for k in keys:
        v = raw.get(k)
        if isinstance(v, str) and v.strip():
            return v.strip()
    return None


def build_payload(raw: Dict[str, Any], fullurl: str, category: str, *, mutate: bool = False) -> Dict[str, Any]:
    # Capabilities -> Dict[str,int]
    capabilities: Dict[str, int] = {}
    for c in raw.get("capabilities", []) or []:
        cap = c.get("capability"); lvl = c.get("level")
        if isinstance(cap, str) and cap:
            try:
                capabilities[cap] = int(lvl)
            except Exception:
                pass

    # Exakte Schlüssel zuerst
    summary   = _first_any(raw, EXACT_KEYS["summary"])   or ""
    execution = _first_any(raw, EXACT_KEYS["execution"]) or ""
    duration  = _first_any(raw, EXACT_KEYS["duration"])  or "0"

    kw_raw = _first_any(raw, EXACT_KEYS["keywords"]) or ""
    if kw_raw:
        parts = [p.strip() for p in kw_raw.replace("\n", ",").split(",")]
        keywords = [p for p in parts if p]
    else:
        keywords = []

    eq_raw = _first_any(raw, EXACT_KEYS["equipment_prim"]) or _first_any(raw, EXACT_KEYS["equipment_alt"]) or ""
    if eq_raw:
        equipment = [e.strip() for e in eq_raw.replace("\n", ",").split(",") if e.strip()]
    else:
        equipment = []

    notes        = _first_any(raw, EXACT_KEYS["notes"])        or ""
    discipline   = _first_any(raw, EXACT_KEYS["discipline"])   or ""
    group        = _first_any(raw, EXACT_KEYS["group"])        or None
    age_group    = _first_any(raw, EXACT_KEYS["age_group"])    or ""
    target_group = _first_any(raw, EXACT_KEYS["target_group"]) or ""
    purpose      = _first_any(raw, EXACT_KEYS["purpose"])      or ""
    preparation  = _first_any(raw, EXACT_KEYS["preparation"])  or ""
    method       = _first_any(raw, EXACT_KEYS["method"])       or ""

    try:
        duration_f = float(duration or 0)
    except Exception:
        duration_f = 0.0

    payload: Dict[str, Any] = {
        "title": raw.get("title") or "",
        "summary": summary,
        "short_description": summary,
        "keywords": keywords,
        "link": fullurl or "",
        "discipline": discipline,
        "group": group,
        "age_group": age_group,
        "target_group": target_group,
        "min_participants": 1,
        "duration_minutes": int(round(duration_f)),
        "capabilities": capabilities,
        "category": category or "",
        "purpose": purpose,
        "execution": execution,
        "notes": (notes + (" [auto-update]" if mutate else "")).strip(),
        "preparation": preparation,
        "method": method,
        "equipment": equipment,
        "fullurl": fullurl or "",
        "external_id": f"mw:{raw.get('pageid')}",
        "source": "MediaWiki",
    }
    payload["fingerprint"] = compute_fingerprint(payload)
    return payload

# ----- Lookup/Upsert -----

def lookup_by_external_id(external_id: str) -> Tuple[Optional[Dict[str, Any]], Optional[int]]:
    url = f"{EXERCISE_API}/by-external-id"
    try:
        r = requests.get(url, params={"external_id": external_id}, timeout=REQUEST_TIMEOUT)
        if r.status_code == 404:
            return None, 404
        r.raise_for_status()
        return r.json(), r.status_code
    except requests.HTTPError as e:
        return {"error": str(e), "status_code": getattr(e.response, "status_code", None)}, getattr(e.response, "status_code", None)
    except Exception as e:
        return {"error": str(e)}, None


def _payload_subset_for_fp(p: Dict[str, Any]) -> Dict[str, Any]:
    return {
        "title": p.get("title"),
        "summary": p.get("summary"),
        "execution": p.get("execution"),
        "notes": p.get("notes"),
        "duration_minutes": p.get("duration_minutes"),
        "capabilities": p.get("capabilities") or {},
        "keywords": p.get("keywords") or [],
    }


def _print_diff(before: Dict[str, Any], after: Dict[str, Any]) -> None:
    keys = ["title","summary","execution","notes","duration_minutes","capabilities","keywords"]
    b = {k: before.get(k) for k in keys}
    a = {k: after.get(k)  for k in keys}
    def _kws(x):
        return sorted({(k or "").strip() for k in (x or [])}, key=str.casefold)
    b_norm = {
        "title": _canon_title(b.get("title")),
        "summary": _norm_text(b.get("summary")),
        "execution": _norm_text(b.get("execution")),
        "notes": _norm_text(b.get("notes")),
        "duration_minutes": b.get("duration_minutes"),
        "capabilities": b.get("capabilities"),
        "keywords": _kws(b.get("keywords")),
    }
    a_norm = {
        "title": _canon_title(a.get("title")),
        "summary": _norm_text(a.get("summary")),
        "execution": _norm_text(a.get("execution")),
        "notes": _norm_text(a.get("notes")),
        "duration_minutes": a.get("duration_minutes"),
        "capabilities": a.get("capabilities"),
        "keywords": _kws(a.get("keywords")),
    }
    diff = {k: (b_norm[k], a_norm[k]) for k in keys if b_norm.get(k) != a_norm.get(k)}
    if diff:
        print("[Diff] changes:", json.dumps(diff, ensure_ascii=False))
    else:
        print("[Diff] (none in hash fields)")


def _now_iso() -> str:
    return time.strftime("%Y-%m-%dT%H:%M:%SZ", time.gmtime())


def upsert_exercise(payload: Dict[str, Any], *, dry_run: bool = False) -> str:
    title = payload.get("title", "<ohne Titel>")
    ext_id = payload.get("external_id")
    fp_new = payload.get("fingerprint")

    found, status = lookup_by_external_id(ext_id)

    action = "create"; reason = "not found (lookup 404)"; found_payload = {}

    if not (status == 404 or found is None):
        if isinstance(found, dict):
            found_payload = found.get("payload", found)
            fp_old_stored = found.get("fingerprint") or found_payload.get("fingerprint")
            fp_old_recalc = compute_fingerprint(_payload_subset_for_fp(found_payload))
            if fp_new == fp_old_stored or fp_new == fp_old_recalc:
                action, reason = "skip", "fingerprint unchanged"
            else:
                action, reason = "update", "fingerprint changed"
        else:
            action, reason = "create", "unexpected lookup type"

    if dry_run:
        print(f"[DryRun] {action.upper():6} '{title}' ({ext_id}) – {reason}")
        if action == "update":
            _print_diff(found_payload, payload)
        return action

    if action == "create":
        body = dict(payload); body["imported_at"] = _now_iso()
        resp = requests.post(EXERCISE_API, json=body, timeout=REQUEST_TIMEOUT)
        if resp.status_code == 422:
            print(f"[Create] '{title}' -> FAILED 422:\n{resp.text}")
            try: resp.raise_for_status()
            except Exception: pass
        else:
            resp.raise_for_status(); print(f"[Create] '{title}' – {reason} -> OK")
    elif action == "update":
        body = dict(payload); body["imported_at"] = _now_iso()
        resp = requests.post(EXERCISE_API, json=body, timeout=REQUEST_TIMEOUT)
        if resp.status_code == 422:
            print(f"[Update] '{title}' -> FAILED 422:\n{resp.text}")
            try: resp.raise_for_status()
            except Exception: pass
        else:
            resp.raise_for_status(); print(f"[Update] '{title}' – {reason} -> OK"); _print_diff(found_payload, payload)
    else:
        print(f"[Skip]   '{title}' – {reason}")
    return action

# ----- Orchestrierung -----

def process_one(title: str, category: str, *, mutate: bool = False, dry_run: bool = False, debug_raw: bool = False) -> str:
    info = fetch_page_info(title)
    pid = info.get("pageid"); fullurl = info.get("fullurl") or ""
    if not pid:
        print(f"[Error] pageid für '{title}' nicht gefunden.", file=sys.stderr); return "failed"
    raw = parse_exercise(title, pid)
    if debug_raw:
        print("[Debug] Raw-Keys:", sorted([k for k in raw.keys() if k not in {"wikitext"}]))
    payload = build_payload(raw, fullurl, category, mutate=mutate)
    return upsert_exercise(payload, dry_run=dry_run)


def process_all(category: str, *, dry_run: bool = False, debug_raw: bool = False) -> Dict[str, int]:
    stats = {"created": 0, "updated": 0, "skipped": 0, "failed": 0}
    print(f"[Main] Lade Liste der Übungen aus Kategorie '{category}'…")
    pages = fetch_all_pages(category)
    print(f"[Main] {len(pages)} Seiten gefunden.")

    for idx, (title, entry) in enumerate(pages.items(), 1):
        try:
            getter = getattr(entry, "get", None)
            pid = getter("pageid") if callable(getter) else None
            fullurl = getter("fullurl") if callable(getter) else None
            if not pid:
                info = fetch_page_info(title); pid = info.get("pageid"); fullurl = fullurl or info.get("fullurl")
            if not pid:
                print(f"[Skip] '{title}' hat keine pageid"); stats["failed"] += 1; continue
            raw = parse_exercise(title, pid)
            if debug_raw and idx <= 5:
                print(f"[Debug] #{idx} '{title}' Raw-Keys:", sorted([k for k in raw.keys() if k not in {"wikitext"}]))
            payload = build_payload(raw, fullurl or "", category)
            act = upsert_exercise(payload, dry_run=dry_run)
            stats["created" if act=="create" else "updated" if act=="update" else "skipped"] += 1
        except requests.HTTPError as e:
            code = getattr(e, "response", None).status_code if getattr(e, "response", None) else None
            if code == 404:
                print(f"[Skip] '{title}': page not found (404)"); stats["failed"] += 1
            else:
                print(f"[Error] '{title}': {e}"); stats["failed"] += 1
        except Exception as e:
            print(f"[Error] '{title}': {e}"); stats["failed"] += 1
    return stats


def run_smoke_test(title: str, category: str, *, debug_raw: bool = False) -> None:
    print("\n[SmokeTest] Lauf 1/3: CREATE (Erstimport)"); act1 = process_one(title, category, mutate=False, debug_raw=debug_raw); print("[SmokeTest] Aktion:", act1)
    print("\n[SmokeTest] Lauf 2/3: SKIP (Wiederholung, unverändert)"); act2 = process_one(title, category, mutate=False, debug_raw=debug_raw); print("[SmokeTest] Aktion:", act2)
    print("\n[SmokeTest] Lauf 3/3: UPDATE (simulierte Wiki-Änderung an 'notes')"); act3 = process_one(title, category, mutate=True, debug_raw=debug_raw); print("[SmokeTest] Aktion:", act3)
    print("\n[SmokeTest] Zusammenfassung:"); print(json.dumps({"run1": act1, "run2": act2, "run3": act3}, ensure_ascii=False, indent=2))

# ----- Main -----

def main() -> None:
    parser = argparse.ArgumentParser(description="Import exercises from Wiki to Qdrant (via FastAPI wiki_router)")
    parser.add_argument("--all", action="store_true", help="Alle Übungen importieren (SMW-Ask)")
    parser.add_argument("--title", type=str, default=DEFAULT_TITLE, help="Einzelimport eines Übungstitels")
    parser.add_argument("--category", type=str, default=DEFAULT_CAT, help="Wiki-Kategorie (z.B. 'Übungen')")
    parser.add_argument("--username", type=str, default=os.getenv("WIKI_BOT_USER"), help="Wiki-Login Benutzer (überschreibt .env)")
    parser.add_argument("--password", type=str, default=os.getenv("WIKI_BOT_PASSWORD"), help="Wiki-Login Passwort (überschreibt .env)")
    parser.add_argument("--skip-login", action="store_true", help="Login-Schritt überspringen (falls Session schon aktiv)")
    parser.add_argument("--dry-run", action="store_true", help="Kein Schreiben; nur Entscheidungen (create/update/skip) + Gründe loggen")
    parser.add_argument("--smoke-test", action="store_true", help="3 Durchläufe (create→skip→update) für --title")
    parser.add_argument("--debug-raw", action="store_true", help="Zeigt die aus dem Wiki gelesenen Roh-Keys je Seite")
    args = parser.parse_args()

    wiki_health()

    if not args.skip_login:
        if not args.username or not args.password:
            print("[Login] Fehler: fehlende Credentials. Setze .env (WIKI_BOT_USER/WIKI_BOT_PASSWORD) oder CLI --username/--password.", file=sys.stderr)
            sys.exit(1)
        try:
            wiki_login(args.username, args.password)
        except Exception as e:
            print(str(e), file=sys.stderr); sys.exit(1)

    if args.smoke_test:
        run_smoke_test(args.title, args.category, debug_raw=args.debug_raw); return

    if args.all:
        stats = process_all(args.category, dry_run=args.dry_run, debug_raw=args.debug_raw)
        print("\n[Stats] created={created} updated={updated} skipped={skipped} failed={failed}".format(**stats))
    else:
        print(f"[Main] Import single exercise: {args.title}")
        result = process_one(args.title, args.category, mutate=False, dry_run=args.dry_run, debug_raw=args.debug_raw)
        print(f"[Result] {result}")

if __name__ == "__main__":
    main()