"""
Script to trigger a digest email for a specific user via the admin API.

Usage:
  python scripts/send_digest.py <email>

The script logs in as an admin using the ADMIN_EMAIL and ADMIN_PASSWORD
environment variables (defaults to localhost:5000).

Environment variables:
  ADMIN_EMAIL     - Admin account email (required)
  ADMIN_PASSWORD  - Admin account password (required)
  API_BASE_URL    - Base URL of the backend API (default: http://localhost:5000)
"""
import sys
import os
import json
import urllib.request
import urllib.error

API_BASE_URL = os.environ.get('API_BASE_URL', 'http://localhost:5000').rstrip('/')


def _post(path: str, body: dict, cookie: str | None = None) -> tuple[int, dict]:
    url = f"{API_BASE_URL}{path}"
    data = json.dumps(body).encode()
    headers = {'Content-Type': 'application/json'}
    if cookie:
        headers['Cookie'] = cookie
    req = urllib.request.Request(url, data=data, headers=headers, method='POST')
    try:
        with urllib.request.urlopen(req) as resp:
            return resp.status, json.loads(resp.read())
    except urllib.error.HTTPError as e:
        try:
            return e.code, json.loads(e.read())
        except Exception:
            return e.code, {}


def main() -> None:
    if len(sys.argv) != 2:
        print('Usage: python scripts/send_digest.py <email>')
        sys.exit(1)

    target_email = sys.argv[1].strip()

    admin_email = os.environ.get('ADMIN_EMAIL', '').strip()
    admin_password = os.environ.get('ADMIN_PASSWORD', '').strip()

    if not admin_email or not admin_password:
        print('Error: ADMIN_EMAIL and ADMIN_PASSWORD environment variables are required')
        sys.exit(1)

    # Log in to get a session cookie
    status, body = _post('/auth/login', {'email': admin_email, 'password': admin_password})
    if status != 200:
        print(f'Login failed ({status}): {body.get("error", body)}')
        sys.exit(1)

    # urllib doesn't automatically store cookies; we need to capture Set-Cookie manually.
    # Re-do the login request to grab the cookie header.
    login_url = f"{API_BASE_URL}/auth/login"
    login_data = json.dumps({'email': admin_email, 'password': admin_password}).encode()
    login_req = urllib.request.Request(
        login_url,
        data=login_data,
        headers={'Content-Type': 'application/json'},
        method='POST',
    )
    try:
        with urllib.request.urlopen(login_req) as resp:
            raw_cookies = resp.headers.get_all('Set-Cookie') or []
    except urllib.error.HTTPError:
        print('Login failed (could not retrieve cookie)')
        sys.exit(1)

    # Extract access_token cookie value
    cookie_header = '; '.join(
        part.split(';')[0] for part in raw_cookies
    )
    if not cookie_header:
        print('Login succeeded but no cookies were returned')
        sys.exit(1)

    # Call the send-digest endpoint
    status, body = _post(
        '/admin/test/send-digest',
        {'email': target_email},
        cookie=cookie_header,
    )

    if status == 200:
        items_sent = body.get('items_sent', 0)
        if items_sent == 0:
            print(f'No pending items found for {target_email} — no email sent.')
        else:
            print(f'Digest sent to {target_email} with {items_sent} item(s).')
    elif status == 404 and body.get('code') == 'NOT_FOUND':
        print('Error: This endpoint is disabled in the current environment (DB_ENV=production).')
        sys.exit(1)
    elif status == 404 and body.get('code') == 'USER_NOT_FOUND':
        print(f'Error: No user found with email {target_email}')
        sys.exit(1)
    elif status == 403:
        print(f'Error: {admin_email} is not an admin account.')
        sys.exit(1)
    else:
        print(f'Error ({status}): {body.get("error", body)}')
        sys.exit(1)


if __name__ == '__main__':
    main()