import os
import time
from django.http import HttpResponse
from django.template.loader import render_to_string
from django.shortcuts import render
from .models import Product


def product_list(request):
    env_type = os.getenv("ENV_TYPE", "undefined")

    # Measure DB query time (force evaluation)
    db_start = time.time()
    items = list(Product.objects.all())
    db_time = time.time() - db_start

    # First render to measure render time
    ctx = {
        'products': items,
        'env_type': env_type,
        'db_time': db_time,
        'total_time': None,
    }

    render_start = time.time()
    _ = render_to_string('products/list.html', ctx, request=request)
    render_time = time.time() - render_start

    total_time = db_time + render_time

    # Final render with measured times
    ctx['total_time'] = total_time
    html = render_to_string('products/list.html', ctx, request=request)
    return HttpResponse(html)