import requests

# Replace these with your actual values
ACCESS_TOKEN = 'EAAaa4YEgkEcBPuLyNFFn7UZAGTHzpPShyzelK0sXgQrSjRcYGXxmE1EPwWBrPYOT1xjgnwwMn3vQrMJ4vVJeNiZCbZBkj39AQXfNfk7tGZA7VZCrrp9hyk9ftNZC1bSkT0NjG0c3Ijfgw7pqqoeoi18jkeqkdpSxT9vVZAo9XeT5ZAuBzJmb2RXZBSDJ2myEOmEwwZBGIEVqI6ZCZBzQ1tJdtSyZCbNuxhU3oOTTRfaHFxgsZD'  # Page Access Token for "Product Maker"
PAGE_ID = '419648507899848'  # The ID of your Facebook page
MESSAGE = 'Hello, world! This is a test post from my Python script.'  # The message you want to post

def verify_token(access_token):
    """
    Verify the access token and check its permissions.
    """
    url = 'https://graph.facebook.com/debug_token'
    params = {
        'input_token': access_token,
        'access_token': access_token
    }
    
    try:
        response = requests.get(url, params=params)
        data = response.json()
        print("\n=== Token Debug Info ===")
        print(f"Response: {data}")
        
        # Extract and display token validity information
        if 'data' in data:
            token_info = data['data']
            print("\n=== Token Validity ===")
            print(f"Is Valid: {token_info.get('is_valid', False)}")
            
            # Check expiration
            if 'expires_at' in token_info:
                expires_at = token_info['expires_at']
                if expires_at == 0:
                    print("Expiration: Never expires (long-lived token)")
                else:
                    from datetime import datetime
                    expiry_date = datetime.fromtimestamp(expires_at)
                    print(f"Expires At: {expiry_date}")
                    
                    # Calculate time remaining
                    now = datetime.now()
                    if expiry_date > now:
                        time_left = expiry_date - now
                        days_left = time_left.days
                        hours_left = time_left.seconds // 3600
                        print(f"Time Remaining: {days_left} days, {hours_left} hours")
                    else:
                        print("Status: TOKEN EXPIRED!")
            
            # Display other relevant info
            if 'data_access_expires_at' in token_info:
                data_expires_at = token_info['data_access_expires_at']
                if data_expires_at > 0:
                    from datetime import datetime
                    data_expiry = datetime.fromtimestamp(data_expires_at)
                    print(f"Data Access Expires At: {data_expiry}")
            
            print(f"App ID: {token_info.get('app_id', 'N/A')}")
            print(f"User ID: {token_info.get('user_id', 'N/A')}")
            print(f"Scopes: {', '.join(token_info.get('scopes', []))}")
        
        return data
    except Exception as e:
        print(f"Error verifying token: {e}")
        return None

def get_page_info(access_token, page_id):
    """
    Get information about the page to verify access.
    """
    url = f'https://graph.facebook.com/{page_id}'
    params = {
        'fields': 'id,name,access_token',
        'access_token': access_token
    }
    
    try:
        response = requests.get(url, params=params)
        data = response.json()
        print("\n=== Page Info ===")
        print(f"Response: {data}")
        return data
    except Exception as e:
        print(f"Error getting page info: {e}")
        return None

def post_to_facebook_page(access_token, page_id, message):
    """
    Posts a message to a Facebook page using the Graph API.
    """
    url = f'https://graph.facebook.com/{page_id}/feed'
    data = {
        'message': message,
        'access_token': access_token
    }

    try:
        response = requests.post(url, data=data)
        response.raise_for_status()  # Raise an exception for bad status codes

        # If successful, print the post ID
        post_data = response.json()
        print(f"\n✓ Post successful! Post ID: {post_data.get('id')}")
        return post_data

    except requests.exceptions.RequestException as e:
        print(f"\n✗ Error posting to Facebook: {e}")
        if response:
            print(f"Response status: {response.status_code}")
            print(f"Response text: {response.text}")
            
            # Try to parse error details
            try:
                error_data = response.json()
                if 'error' in error_data:
                    print(f"\nError details:")
                    print(f"  Type: {error_data['error'].get('type')}")
                    print(f"  Message: {error_data['error'].get('message')}")
                    print(f"  Code: {error_data['error'].get('code')}")
            except:
                pass
        return None

if __name__ == "__main__":
    print("=== Facebook Page Poster ===\n")
    
    # Step 1: Verify token
    print("Step 1: Verifying access token...")
    verify_token(ACCESS_TOKEN)
    
    # Step 2: Get page info
    print("\nStep 2: Getting page information...")
    page_info = get_page_info(ACCESS_TOKEN, PAGE_ID)
    
    # If page has its own access token, use that instead
    page_access_token = ACCESS_TOKEN
    if page_info and 'access_token' in page_info:
        print("\n✓ Found page-specific access token, using that instead.")
        page_access_token = page_info['access_token']
    
    # Step 3: Post to page
    print("\nStep 3: Attempting to post...")
    post_to_facebook_page(page_access_token, PAGE_ID, MESSAGE)