# Function.py
import os
import time
import requests
from dotenv import load_dotenv

# Load .env variables once
load_dotenv()

WHATSAPP_TOKEN = os.getenv("WHATSAPP_TOKEN")
WHATSAPP_PHONE_ID = os.getenv("WHATSAPP_PHONE_NUMBER_ID")
WHATSAPP_RECIPIENT = os.getenv("WHATSAPP_RECIPIENT_NUMBER")

WAPI_URL = f"https://graph.facebook.com/v21.0/{WHATSAPP_PHONE_ID}/messages"


def SendWhatsAppMessage(message: str, retries: int = 3, delay: int = 2) -> bool:
    """
    Sends a WhatsApp message using the WhatsApp Cloud API test number.
    Automatically retries on failure.

    :param message: Text to send.
    :param retries: Number of retry attempts.
    :param delay: Delay between retries (seconds).
    :return: True if message sent successfully, False otherwise.
    """

    # --- safety check: missing config ---
    if not WHATSAPP_TOKEN or not WHATSAPP_PHONE_ID or not WHATSAPP_RECIPIENT:
        print("❌ WhatsApp API configuration missing in .env")
        return False

    headers = {
        "Authorization": f"Bearer {WHATSAPP_TOKEN}",
        "Content-Type": "application/json"
    }

    payload = {
        "messaging_product": "whatsapp",
        "to": WHATSAPP_RECIPIENT,
        "type": "text",
        "text": {"body": message}
    }

    # --- retry loop ---
    for attempt in range(1, retries + 1):
        try:
            response = requests.post(WAPI_URL, headers=headers, json=payload, timeout=15)
            status = response.status_code

            if status == 200:
                print(f"📨 WhatsApp message sent successfully (attempt {attempt})")
                return True

            else:
                print(f"⚠️ WhatsApp API error (attempt {attempt}): {status} {response.text}")

        except requests.RequestException as e:
            print(f"⚠️ Network error (attempt {attempt}): {e}")

        time.sleep(delay)

    print("❌ Failed to send WhatsApp message after retries.")
    return False

# -----------------------------------------------------
#   Find Dropbox root by reading official info.json
# -----------------------------------------------------

def get_dropbox_root() -> str | None:
    # """
    # Returns the absolute Dropbox folder path by reading:
    #   C:\Users\<user>\AppData\Local\Dropbox\info.json
    # This is 100% reliable even if Dropbox changes drive letter.
    # """

    import os
    import json

    localapp = os.environ.get("LOCALAPPDATA")
    if not localapp:
        print("⚠️ LOCALAPPDATA not found.")
        return None

    info_path = os.path.join(localapp, "Dropbox", "info.json")

    if not os.path.exists(info_path):
        print(f"⚠️ Dropbox info.json not found at: {info_path}")
        return None

    try:
        with open(info_path, "r", encoding="utf-8") as f:
            data = json.load(f)

        # Most users: `personal`
        if "personal" in data and "path" in data["personal"]:
            return data["personal"]["path"]

        # Business Dropbox if used
        if "business" in data and "path" in data["business"]:
            return data["business"]["path"]

        print("⚠️ Dropbox info.json missing 'path' in personal/business")
        return None

    except Exception as e:
        print(f"⚠️ Error reading Dropbox info.json: {e}")
        return None