import urllib.request
import urllib.error
import json

def test_calculate_meal():
    url = "http://127.0.0.1:8000/api/meal/calculate"
    login_url = "http://127.0.0.1:8000/api/login"
    
    # Login
    login_data = json.dumps({"username": "testuser", "password": "password"}).encode('utf-8')
    req = urllib.request.Request(login_url, data=login_data, headers={'Content-Type': 'application/json'})
    try:
        with urllib.request.urlopen(req) as response:
            login_resp = json.loads(response.read().decode())
    except urllib.error.URLError as e:
        print(f"Login failed: {e}")
        return
        
    token = login_resp.get("token")
    if not token:
        print("No token received")
        return
        
    headers = {
        "Authorization": f"Bearer {token}",
        "Content-Type": "application/json"
    }
    
    payload = {
        "items": [
            {"food_id": 1, "amount_g": 200.5},
            {"food_id": 2, "amount_g": 50}
        ]
    }
    
    data = json.dumps(payload).encode('utf-8')
    req = urllib.request.Request(url, data=data, headers=headers)
    
    print("Sending payload:")
    print(json.dumps(payload, indent=2))
    
    try:
        with urllib.request.urlopen(req) as response:
            print(f"\nResponse Code: {response.getcode()}")
            resp_data = json.loads(response.read().decode())
            print("Response JSON:")
            print(json.dumps(resp_data, indent=2))
    except urllib.error.HTTPError as e:
        print(f"Response Error: {e.code}")
        print(e.read().decode())

if __name__ == "__main__":
    test_calculate_meal()