#!/usr/bin/env python3
"""
Tracking Pixel Generator
Generate self-hosted open tracking pixels for emails
"""
import base64
import hashlib
from urllib.parse import urlencode

# 1x1 transparent GIF
PIXEL_GIF = base64.b64decode(
    'R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7'
)

def generate_tracking_id(campaign_id, recipient_email):
    """Generate unique tracking ID"""
    data = f"{campaign_id}:{recipient_email}"
    return hashlib.sha256(data.encode()).hexdigest()[:16]

def generate_pixel_url(base_url, campaign_id, recipient_email):
    """Generate tracking pixel URL"""
    tracking_id = generate_tracking_id(campaign_id, recipient_email)
    params = {
        'c': campaign_id,
        't': tracking_id
    }
    return f"{base_url}/track/open.gif?{urlencode(params)}"

def generate_pixel_html(pixel_url):
    """Generate HTML for tracking pixel"""
    return f''

def generate_batch(base_url, campaign_id, recipients):
    """Generate tracking pixels for multiple recipients"""
    pixels = []
    for email in recipients:
        url = generate_pixel_url(base_url, campaign_id, email)
        html = generate_pixel_html(url)
        pixels.append({
            'email': email,
            'url': url,
            'html': html
        })
    return pixels

if __name__ == '__main__':
    base_url = 'https://track.yourdomain.com'
    campaign = 'campaign_2024_01'
    recipient = 'user@example.com'

    url = generate_pixel_url(base_url, campaign, recipient)
    print(f"Tracking URL: {url}")
    print(f"HTML: {generate_pixel_html(url)}")