import uuid
import time
import re
from fasthtml.common import *
from modules.database import load_history, save_history
from modules.scraper import rechercher_sur_google, extraire_contenu_urls
from modules.router import nettoyer_decision_router
from modules.ai_engine import local_client, interroger_gemini_cascade, appeler_groq_api
from modules.ui_components import render_user_msg, render_ai_msg, render_sidebar

async def handle_chat_request(request, session):
    try:
        form = await request.form()
        prompt = form.get("prompt", "")
        chat_id = form.get("chat_id", str(uuid.uuid4()))
        files = form.getlist("files")
        session['current_chat_id'] = chat_id
        
        history = load_history()
        
        sec_prompt = f"""Analyse et route cette demande. Si recherche web nécessaire ("va sur", "site", "historique", "version", "cherche", etc.) -> choisis "gemini". Si code/technique -> "groq". Sinon -> "local".
        Renvoie STRICTEMENT un JSON : {{"intention": "...", "fournisseur": "gemini|groq|local"}}
        Requête : {prompt}"""
        
        router_res = local_client.chat.completions.create(model="qwen2.5:3b", messages=[{"role": "system", "content": "JSON uniquement."}, {"role": "user", "content": sec_prompt}], temperature=0.1)
        decision = nettoyer_decision_router(router_res.choices[0].message.content)
        intention, fournisseur = decision.get('intention', 'Analyse'), decision.get('fournisseur', 'gemini').lower()

        urls = re.findall(r'https?://[^\s]+', prompt)
        mots_cles = ["cherche", "recherche", "sur internet", "sur le web", "sur le net", "va sur", "trouve", "site", "donne", "historique", "version"]
        if any(m in prompt.lower() for m in mots_cles):
            urls.extend(rechercher_sur_google(prompt))

        web_text = extraire_contenu_urls(list(set(urls))) if urls else ""
        
        file_summary = []
        file_names = []
        for f in files[:10]:
            if f and f.filename:
                file_names.append(f.filename)
                content = await f.read()
                file_summary.append(f"\n--- Fichier: {f.filename} ---\n{content.decode('utf-8', errors='ignore')}")

        full_prompt = prompt + ("\n" + "\n".join(file_summary) if file_summary else "")
        if web_text:
            full_prompt += f"\n\n[Contexte web extrait :\n{web_text}\nUtilise ces informations pour répondre précisément.]"

        if fournisseur == "gemini":
            try:
                reponse, modele = interroger_gemini_cascade(full_prompt)
                couleur, fournisseur_nom = "#3b82f6", "GOOGLE GEMINI"
            except Exception:
                reponse, couleur, fournisseur_nom, modele = appeler_groq_api(full_prompt)
                fournisseur_nom, intention = "GROQ (Secours)", intention + " (Secours)"
        elif fournisseur == "groq":
            reponse, couleur, fournisseur_nom, modele = appeler_groq_api(full_prompt)
        else:
            res_local = local_client.chat.completions.create(model="qwen2.5:3b", messages=[{"role": "system", "content": "Réponds en français."}, {"role": "user", "content": full_prompt}])
            reponse, couleur, fournisseur_nom, modele = res_local.choices[0].message.content, "#10b981", "SERVEUR LOCAL", "qwen2.5:3b"

        if chat_id not in history:
            history[chat_id] = {"title": (prompt[:30] if prompt else "Discussion") + "...", "pinned": False, "timestamp": time.time(), "messages": []}

        display_msg = prompt + (f"\n📎 [Fichiers: {', '.join(file_names)}]" if file_names else "")
        history[chat_id]['messages'].append({"role": "user", "content": display_msg})
        history[chat_id]['messages'].append({"role": "ai", "content": reponse, "intention": intention, "fournisseur": fournisseur_nom, "modele": modele, "couleur": couleur})
        save_history(history)

        return render_user_msg(display_msg), render_ai_msg(reponse, intention, fournisseur_nom, modele, couleur), Script("renderMarkdown();"), render_sidebar()

    except Exception as e:
        return Div(f"Erreur : {e}", style="color:red; background:#300; padding:15px; border-radius:10px;")