package crawler_test

import (
	"context"
	"fmt"
	"strings"
	"testing"

	"git.pengzhan.dev/aimaren/internal/crawler"
)

const (
	// The live URL to be used for the end-to-end test.
	testURL = "https://www.hermes.com/us/en/category/women/bags-and-small-leather-goods/bags-and-clutches/"
)

// TestScrape_EndToEnd performs a live test against the Hermès website.
// NOTE: This test makes a real network request and may fail due to network issues,
// IP blocking, or changes on the live website.
func TestScrape_EndToEnd(t *testing.T) {
	t.Log("🚀 Starting end-to-end test against:", testURL)

	// Requirement 1 & 2: Get HTML content and generate bags.
	// The Scrape function handles the HTTP request internally.
	// If the response is not 200 OK, it will return an error.
	bags, err := crawler.Scrape(context.WithValue(t.Context(), crawler.DebugContextKey, true), testURL)
	if err != nil {
		t.Fatalf("❌ Test Failed: The scrape function returned an error. This could be a network issue or a non-200 response from the server. Error: %v", err)
	}

	// Requirement 2: Fail if the result is empty.
	if len(bags) == 0 {
		t.Fatalf("❌ Test Failed: Scraper found 0 items. The website's HTML structure has likely changed completely, or the request was blocked.")
	}

	t.Logf("✅ Successfully scraped %d items. Performing data validation...", len(bags))

	var availableCount, unavailableCount int
	var sampleBags []string

	for sku, bag := range bags {
		// Requirement 4 (Others): Sanity check each parsed item.
		if bag.Name == "" {
			t.Errorf("❌ Test Failed: Bag with SKU %s has an empty Name.", sku)
		}
		if !strings.HasPrefix(bag.URL, "http") {
			t.Errorf("❌ Test Failed: Bag with SKU %s has an invalid URL: %s", sku, bag.URL)
		}

		// Requirement 3: Count availability for health check.
		if bag.Availability {
			availableCount++
		} else {
			unavailableCount++
		}

		// Collect a few samples for logging.
		if len(sampleBags) < 3 {
			sampleBags = append(sampleBags, fmt.Sprintf("  - %s (Available: %t)", bag.Name, bag.Availability))
		}
	}

	// Log statistics for review.
	t.Logf("📊 Availability Stats: %d Available, %d Unavailable", availableCount, unavailableCount)
	t.Logf("✨ Sample Items:\n%s", strings.Join(sampleBags, "\n"))

	// Requirement 3: Warn if availability is homogenous.
	if availableCount == 0 || unavailableCount == 0 {
		// This is a warning, not a failure. It flags a potential issue with the availability logic.
		t.Logf("⚠️ WARNING: All scraped bags have the same availability status. The 'unavailable' indicator on the website may have changed, causing our logic to be incorrect.")
	}

	t.Log("✅ End-to-end test completed successfully.")
}