import requests
import base64
import os
from dotenv import load_dotenv

# Load environment variables from .env file
load_dotenv()

# Retrieve credentials from environment variables
USERNAME = os.getenv("SF_USERNAME")
PASSWORD = os.getenv("SF_PASSWORD")
SECURITY_TOKEN = os.getenv("SF_SECURITY_TOKEN")
DOMAIN = os.getenv("SF_DOMAIN", "test")  # Default to sandbox; use "login" for production

# Validate environment variables
if not all([USERNAME, PASSWORD, SECURITY_TOKEN]):
    raise ValueError("❌ Missing required environment variables. Ensure SF_USERNAME, SF_PASSWORD, and SF_SECURITY_TOKEN are set.")

LOGIN_URL = f"https://sathkruthatechsolutionspr45-dev-ed.develop.lightning.force.com/lightning/setup/SetupOneHome/home"

def get_token():
    url = f"https://sathkruthatechsolutionspr45-dev-ed.develop.lightning.force.com/lightning/setup/SetupOneHome/home/services/oauth2/token"
    payload = {
        'grant_type': 'password',
        'username': USERNAME,
        'password': PASSWORD + SECURITY_TOKEN
    }

    try:
        response = requests.post(url, data=payload)
        print(f"Response Status: {response.status_code}")
        print(f"Response Body: {response.text}")
        result = response.json()

        if response.status_code == 200 and 'access_token' in result:
            return result['access_token'], result['instance_url']
        else:
            print(f"Login failed with response: {result}")
            raise Exception(f"❌ Salesforce login failed: {result}")
    except requests.RequestException as e:
        raise Exception(f"🚨 Network error during Salesforce login: {str(e)}")

def get_salesforce_objects(token, instance_url):
    headers = {'Authorization': f'Bearer {token}'}
    response = requests.get(f"{instance_url}/services/data/v56.0/sobjects", headers=headers)
    return response.json().get('sobjects', [])

def create_record(object_name, data, token, instance_url):
    headers = {
        'Authorization': f'Bearer {token}',
        'Content-Type': 'application/json'
    }
    url = f"{instance_url}/services/data/v56.0/sobjects/{object_name}/"
    response = requests.post(url, json=data, headers=headers)
    return response.json()

def attach_pdf(record_id, file_path, token, instance_url):
    try:
        with open(file_path, "rb") as f:
            body = base64.b64encode(f.read()).decode()

        data = {
            "ParentId": record_id,
            "Name": os.path.basename(file_path),
            "Body": body
        }
        headers = {
            'Authorization': f'Bearer {token}',
            'Content-Type': 'application/json'
        }
        url = f"{instance_url}/services/data/v56.0/sobjects/Attachment"
        response = requests.post(url, json=data, headers=headers)
        return response.json()
    except FileNotFoundError:
        raise Exception(f"❌ File not found: {file_path}")
    except Exception as e:
        raise Exception(f"🚨 Error attaching PDF: {str(e)}")

# Example usage
if __name__ == "__main__":
    try:
        # Get access token and instance URL
        token, instance_url = get_token()
        print(f"✅ Successfully authenticated.")

        # Example: List Salesforce objects
        objects = get_salesforce_objects(token, instance_url)
        print(f"Found {len(objects)} Salesforce objects")

        # Example: Create a record
        sample_data = {"Name": "Test Account"}
        result = create_record("Account", sample_data, token, instance_url)
        print(f"Created record: {result}")

        # Example: Attach a PDF
        record_id = result.get("id")
        if record_id:
            attach_pdf(record_id, "sample.pdf", token, instance_url)
            print("✅ PDF attached successfully")
    except Exception as e:
        print(f"Error: {str(e)}")