import requests, re, warnings
from dotenv import load_dotenv
from fastapi import FastAPI, Request, HTTPException
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import FileResponse, StreamingResponse
from bs4 import BeautifulSoup

from huggingface_hub import configure_http_backend

from schemas import *
from classes import *

def backend_factory() -> requests.Session:
    session = requests.Session()
    session.verify = False
    return session

configure_http_backend(backend_factory=backend_factory)
warnings.filterwarnings("ignore")
load_dotenv()

meetings_mapping = {
    "SA": [
        "TSG_SA",
        "WG1_Serv",
        "WG2_Arch",
        "WG3_Security",
        "WG4_CODEC",
        "WG5_TM",
        "WG6_MissionCritical"
    ],
    "CT": [
        "TSG_CT",
        "WG1_mm-cc-sm_ex-CN1",
        "WG2_capability_ex-T2",
        "WG3_interworking_ex-CN3",
        "WG4_protocollars_ex-CN4",
        "WG5_osa_ex-CN5",
        "WG6_Smartcard_Ex-T3"
    ],
    "RAN": [
        "TSG_RAN",
        "WG1_RL1",
        "WG2_RL2",
        "WG3_Iu",
        "WG4_Radio",
        "WG5_Test_ex-T1",
        "WG6_legacyRAN"
    ]
}

tdoc_indexer = TDocIndexer()
spec_3gpp_indexer = Spec3GPPIndexer()
spec_etsi_indexer = SpecETSIIndexer()

app = FastAPI()
app.add_middleware(CORSMiddleware, allow_credentials=True, allow_headers=["*"], allow_origins=["*"])

@app.get('/')
def main():
    return FileResponse("index.html")
def get_folder_name(working_group: str):
    if working_group.endswith("P"):
        if working_group.startswith("S"):
            return ("SA", 0)
        if working_group.startswith("C"):
            return ("CT", 0)
        if working_group.startswith("R"):
            return ("RAN", 0)
    m = re.match(r"([A-Z]+)(\d+)", working_group)
    if m:
        code, num = m.groups()
        return (code, int(num))
    else:
        raise ValueError("Format inattendu")

@app.get("/get_meetings/{working_group}")
def get_meetings(working_group: str):
    category, wg_number = get_folder_name(working_group)
    folder = meetings_mapping[category][wg_number]
    url = f"https://www.3gpp.org/ftp/{meetings_mapping[category][0]}/{folder}"
    response = requests.get(url, verify=False)
    responseHTML = response.text
    soup = BeautifulSoup(responseHTML, "html.parser")
    return {"url": url, "meetings": [item.get_text() for item in soup.select("tr td a") if item.get_text().startswith("TSG") or item.get_text().startswith("CT")]}

@app.post("/index_tdocs/working_group")
def index_tdocs_wg_progress(req: IndexTDoc):
    if not req.wg:
        raise HTTPException(status_code=400, detail="Working Group not defined !")
    category, wg_number = get_folder_name(req.wg)
    folder = meetings_mapping[category][wg_number]
    url = f"https://www.3gpp.org/ftp/{meetings_mapping[category][0]}"

    tdoc_indexer.process_workgroup(folder, url)
    return {"status": "OK"}

@app.post("/index_tdocs/meeting")
def index_tdocs_meeting_progress(req: IndexTDoc):
    if not req.wg:
        raise HTTPException(status_code=400, detail="Working Group not defined !")
    if not req.meetings:
        raise HTTPException(status_code=400, detail="Meetings not defined !")

    category, wg_number = get_folder_name(req.wg)
    folder = meetings_mapping[category][wg_number]
    url = f"https://www.3gpp.org/ftp/{meetings_mapping[category][0]}/{folder}"
    for i, meet in enumerate(req.meetings):
        tdoc_indexer.process_meeting(meet, url)
    tdoc_indexer.save_indexer()
    return {"status": "OK"}


@app.post("/index_tdocs/all")
def index_all_tdocs_progress():
    tdoc_indexer.index_all_tdocs()
    return {"status": "OK"}


@app.post("/index_specs/3gpp")
def index_3gpp_specs_progress():
    spec_3gpp_indexer.run()
    spec_3gpp_indexer.save()
    spec_3gpp_indexer.create_bm25_index()
    return {"status": "OK"}

@app.post("/index_specs/etsi")
def index_etsi_specs_progress():
    spec_etsi_indexer.run()
    spec_etsi_indexer.save()
    spec_etsi_indexer.create_bm25_index()
    return {"status": "OK"}