import os
import stripe
import smtplib
from email.mime.text import MIMEText
from storage import create_license_key

stripe.api_key = os.environ.get("STRIPE_SECRET_KEY")
WEBHOOK_SECRET = os.environ.get("STRIPE_WEBHOOK_SECRET")

GMAIL_USER = os.environ.get("GMAIL_USER")
GMAIL_PASS = os.environ.get("GMAIL_APP_PASS")

SPACE_URL = os.environ.get("SPACE_URL", "https://huggingface.co/spaces")  # nastav jako secret

PLAN_MAP = {
    os.environ.get("STRIPE_PRICE_SINGLE"): "single",
    os.environ.get("STRIPE_PRICE_PRO"):    "pro",
}

def send_license_email(to_email: str, key: str, plan: str):
    if not GMAIL_USER or not GMAIL_PASS:
        print("Gmail není nakonfigurován — email neodeslán.")
        return

    plan_label = "Pro (neomezený)" if plan == "pro" else "Jednorázová analýza"

    body = f"""Ahoj!

Děkujeme za nákup ResumeLens AI — {plan_label}.

Tvůj licenční klíč:

  {key}

Jak ho použít:
1. Jdi na {SPACE_URL}
2. Rozbal sekci "Máš Pro licenci? Zadej klíč"
3. Vlož svůj klíč a klikni Analyzovat

Klíč je aktivní okamžitě.

Při jakémkoliv problému odpověz na tento email.

— ResumeLens AI
"""
    msg = MIMEText(body, "plain", "utf-8")
    msg["Subject"] = "Tvůj ResumeLens AI klíč 🎯"
    msg["From"]    = GMAIL_USER
    msg["To"]      = to_email

    try:
        with smtplib.SMTP_SSL("smtp.gmail.com", 465) as server:
            server.login(GMAIL_USER, GMAIL_PASS)
            server.send_message(msg)
        print(f"Email odeslán na {to_email}")
    except Exception as e:
        print(f"Chyba emailu: {e}")

def handle_stripe_webhook(payload: bytes, sig_header: str) -> dict:
    try:
        event = stripe.Webhook.construct_event(payload, sig_header, WEBHOOK_SECRET)
    except stripe.error.SignatureVerificationError as e:
        return {"ok": False, "error": f"Neplatný podpis: {e}"}
    except Exception as e:
        return {"ok": False, "error": str(e)}

    if event["type"] == "checkout.session.completed":
        session = event["data"]["object"]
        email   = session.get("customer_details", {}).get("email", "unknown")

        price_id = None
        try:
            line_items = stripe.checkout.Session.list_line_items(session["id"])
            if line_items.data:
                price_id = line_items.data[0].price.id
        except Exception:
            pass

        plan = PLAN_MAP.get(price_id, "single")
        key  = create_license_key(email, plan)

        send_license_email(email, key, plan)

        return {"ok": True, "key": key, "email": email, "plan": plan}

    return {"ok": True, "key": None, "email": None}