from fastapi import FastAPI, Request
from fastapi.responses import PlainTextResponse
from datetime import datetime, timezone, timedelta
import requests, os

app = FastAPI()

VERIFY_TOKEN = os.getenv("VERIFY_TOKEN")
PAGE_ACCESS_TOKEN = os.getenv("PAGE_ACCESS_TOKEN")
SUPABASE_URL = os.getenv("SUPABASE_URL")
SUPABASE_API_KEY = os.getenv("SUPABASE_API_KEY")
GAS_WEBAPP_URL = os.getenv("GAS_WEBAPP_URL")

# لو لسه هتستعمل exchange_code
APP_ID = os.getenv("APP_ID")
APP_SECRET = os.getenv("APP_SECRET")
REDIRECT_URI = os.getenv("REDIRECT_URI")

@app.get("/webhook")
async def verify_webhook(request: Request):
    params = request.query_params
    code = params.get("code")

    # ✅ OAuth via GAS (اختياري)
    if code:
        gas_payload = {
            "action": "exchange_code",
            "client_id": APP_ID,
            "redirect_uri": REDIRECT_URI,
            "client_secret": APP_SECRET,
            "code": code
        }
        resp = requests.post(GAS_WEBAPP_URL, json=gas_payload, timeout=20)
        print("🎟️ Token Exchange Response:", resp.json())
        return PlainTextResponse("Token exchange completed")

    # ✅ Verification normal
    if params.get("hub.mode") == "subscribe" and params.get("hub.verify_token") == VERIFY_TOKEN:
        return PlainTextResponse(content=params.get("hub.challenge"))
    return PlainTextResponse(content="Verification failed", status_code=403)

@app.post("/webhook")
async def receive_webhook(request: Request):
    payload = await request.json()
    print("📥 Webhook payload received:")
    gmt_plus_3 = timezone(timedelta(hours=3))
    print("Timestamp:", datetime.now(gmt_plus_3).strftime('%Y-%m-%d %H:%M:%S'))

    try:
        for entry in payload.get("entry", []):
            for change in entry.get("changes", []):
                if change.get("field") == "leadgen":
                    lead_id = change["value"]["leadgen_id"]
                    print(f"🔍 Lead ID: {lead_id}")

                    # ✅ Fetch lead via GAS
                    gas_payload = {
                        "action": "fetch_lead",
                        "lead_id": lead_id,
                        "access_token": PAGE_ACCESS_TOKEN
                    }
                    response = requests.post(GAS_WEBAPP_URL, json=gas_payload, timeout=20)
                    data = response.json()

                    # لو Meta رجعت error
                    if "error" in data:
                        print("⚠️ Meta error:", data)
                        return {"status": "error", "meta": data}

                    print("RAW GAS RESPONSE:", data)

                    field_map = {}
                    for item in data.get("field_data", []):
                        field_map[item.get("name")] = ", ".join(item.get("values", []))

                    headers = {
                        "apikey": SUPABASE_API_KEY,
                        "Authorization": f"Bearer {SUPABASE_API_KEY}",
                        "Content-Type": "application/json"
                    }
                    insert_data = {
                        "platform": "meta",
                        "campaign_id": data.get("campaign_id"),
                        "campaign_name": data.get("campaign_name"),
                        "adset_id": data.get("adset_id"),
                        "adset_name": data.get("adset_name"),
                        "ad_id": data.get("ad_id"),
                        "lead_id": lead_id,
                        "full_name": field_map.get("full name"),
                        "email": field_map.get("email"),
                        "phone": field_map.get("phone_number"),
                        "city": field_map.get("city"),
                        "lead_timestamp": datetime.now(gmt_plus_3).strftime("%Y-%m-%d %H:%M:%S+03")
                    }

                    supa_resp = requests.post(
                        f"{SUPABASE_URL}/rest/v1/binrushdleads",
                        headers=headers,
                        json=insert_data
                    )
                    print("💾 Supabase insert status:", supa_resp.status_code)

    except Exception as e:
        print(f"⚠️ Error processing lead: {e}")

    return {"status": "ok"}