"""
File: wiki_router.py
Beschreibung:
- Endpunkte für MediaWiki-Integration im lokalen Netzwerk.
- Funktionen:
  * /health: Prüft Verfügbarkeit der MediaWiki-API.
  * /login: Führt clientlogin durch und speichert Session-Cookies.
  * /semantic/pages: Listet alle Übungen inkl. Unterkategorien via SMW-Ask.
  * /parsepage: Ruft Roh-Wikitext über action=parse für eine Seite ab.
  * /info: Liefert pageid und fullurl über Core-API Query.
  * /semantic/page: Liefert Metadaten einer Übung und Wikitext sowie pageid über Core-API.
Version: 1.2.0
"""
from dotenv import load_dotenv
load_dotenv()
from fastapi import APIRouter, HTTPException, Query
from pydantic import BaseModel
from typing import Dict, Any, List
import requests, os

__version__ = "1.2.0"
router = APIRouter()

WIKI_API_URL = os.getenv("WIKI_API_URL", "https://karatetrainer.net/api.php")
wiki_session = requests.Session()

class WikiLoginRequest(BaseModel):
    username: str
    password: str

class WikiLoginResponse(BaseModel):
    status: str
    message: str | None = None

class PageContentResponse(BaseModel):
    pageid: int
    title: str
    wikitext: str

class PageInfoResponse(BaseModel):
    pageid: int
    title: str
    fullurl: str

# Health-Check
@router.get("/health")
def health_check():
    try:
        resp = wiki_session.get(
            WIKI_API_URL,
            params={"action": "query", "meta": "siteinfo", "siprop": "general", "format": "json"},
            timeout=5
        )
        resp.raise_for_status()
    except Exception as e:
        raise HTTPException(status_code=502, detail=f"Wiki nicht erreichbar: {e}")
    return {"status": "ok"}

# Login Endpoint
@router.post("/login", response_model=WikiLoginResponse)
def login(data: WikiLoginRequest):
    # Token holen
    try:
        token_resp = wiki_session.get(
            WIKI_API_URL,
            params={"action": "query", "meta": "tokens", "type": "login", "format": "json"},
            timeout=10
        )
        token_resp.raise_for_status()
        token = token_resp.json().get("query", {}).get("tokens", {}).get("logintoken")
    except Exception as e:
        raise HTTPException(status_code=502, detail=f"Token-Error: {e}")
    if not token:
        raise HTTPException(status_code=502, detail="Kein Login-Token erhalten")
    # clientlogin
    try:
        login_resp = wiki_session.post(
            WIKI_API_URL,
            data={
                "action": "clientlogin",
                "format": "json",
                "username": data.username,
                "password": data.password,
                "logintoken": token,
                "loginreturnurl": "http://localhost:8000"
            },
            timeout=10
        )
        login_resp.raise_for_status()
        status = login_resp.json().get("clientlogin", {}).get("status")
    except Exception:
        status = None
    # fallback login
    if status != "PASS":
        alt = wiki_session.post(
            WIKI_API_URL,
            data={"action": "login", "format": "json", "lgname": data.username, "lgpassword": data.password},
            timeout=10
        )
        alt.raise_for_status()
        status = alt.json().get("login", {}).get("result")
    if status in ("PASS", "Success"):
        return WikiLoginResponse(status="success", message=None)
    return WikiLoginResponse(status="failed", message="Login fehlgeschlagen")

# SMW-Ask: alle Übungen inkl. Unterkategorien
@router.get("/semantic/pages")
def semantic_pages(category: str = Query(..., description="Kategorie ohne 'Category:'")) -> Dict[str, Any]:
    smw_query = f"[[Category:{category}]]"
    ask_query = f"{smw_query}|limit=50000"
    r = wiki_session.get(
        WIKI_API_URL,
        params={"action": "ask", "query": ask_query, "format": "json"},
        timeout=30
    )
    try:
        r.raise_for_status()
    except Exception as e:
        raise HTTPException(status_code=502, detail=f"SMW-Ask-Error: {e}")
    return r.json().get("query", {}).get("results", {})

# Wikitext über parse-Endpoint holen (per pageid)
@router.get("/parsepage", response_model=PageContentResponse)
def parse_page(pageid: int = Query(...), title: str = Query(None)):
    r = wiki_session.get(
        WIKI_API_URL,
        params={"action": "parse", "pageid": pageid, "prop": "wikitext", "format": "json"},
        timeout=20
    )
    try:
        r.raise_for_status()
    except Exception as e:
        raise HTTPException(status_code=502, detail=f"Parse-Error: {e}")
    wikitext = r.json().get("parse", {}).get("wikitext", {}).get("*", "")
    return PageContentResponse(pageid=pageid, title=title or "", wikitext=wikitext)

# Pageinfo über Core-API (ermittelt pageid + fullurl)
@router.get("/info", response_model=PageInfoResponse)
def page_info(title: str = Query(..., description="Name der Seite")):
    r = wiki_session.get(
        WIKI_API_URL,
        params={"action": "query", "titles": title, "prop": "info", "inprop": "url", "format": "json"},
        timeout=10
    )
    try:
        r.raise_for_status()
    except Exception as e:
        raise HTTPException(status_code=502, detail=f"Info-Error: {e}")
    pages = r.json().get("query", {}).get("pages", {})
    pid_str, page = next(iter(pages.items()))
    pid = int(pid_str)
    fullurl = page.get("fullurl")
    return PageInfoResponse(pageid=pid, title=page.get("title"), fullurl=fullurl)

# Detail-Endpoint für eine Übung: Metadaten aus Ask + Wikitext & ID via Core-API
@router.get("/semantic/page", response_model=Dict[str, Any])
def semantic_page_detail(category: str = Query(...), title: str = Query(...)) -> Dict[str, Any]:
    # Metadaten aus SMW-Ask
    entries = semantic_pages(category)
    entry = entries.get(title)
    if not entry:
        raise HTTPException(status_code=404, detail="Übung nicht gefunden im SMW-Ask-Ergebnis.")
    # Pageinfo via Core-API
    info = page_info(title=title)
    # Wikitext via parse
    parsed = parse_page(pageid=info.pageid, title=title)
    return {
        "title": title,
        "pageid": info.pageid,
        "fullurl": info.fullurl,
        "printouts": entry.get("printouts", {}),
        "wikitext": parsed.wikitext
    }