package latest

import (
	"context"
	"net/http"
	"os"
	"testing"
	"time"
)

// TestSmokeKaganeImage is the live proof that the cover proxy's fetch actually
// clears Cloudflare and returns image bytes. It needs a real headless Chrome
// with outbound network, so it runs only when SMOKE_BROWSER_WS_URL is set:
//
//	docker run --rm --shm-size=1gb -p 19222:9222 chromedp/headless-shell:stable
//	SMOKE_BROWSER_WS_URL=ws://127.0.0.1:19222 go test -run TestSmokeKaganeImage ./internal/latest
func TestSmokeKaganeImage(t *testing.T) {
	ws := os.Getenv("SMOKE_BROWSER_WS_URL")
	if ws == "" {
		t.Skip("SMOKE_BROWSER_WS_URL unset")
	}
	const imageID = "019fe11a-84c3-7fc3-a84b-88787374b617" // SP Baby's cover

	// The same URL through a plain client is what the web UI's <img> gets.
	// Asserting on it keeps the test honest about why the browser is needed.
	req, err := http.NewRequest(http.MethodGet,
		"https://kagane.to/api/v2/image/"+imageID+"/compressed", nil)
	if err != nil {
		t.Fatal(err)
	}
	if res, err := (&http.Client{Timeout: 15 * time.Second}).Do(req); err == nil {
		res.Body.Close()
		if res.StatusCode == http.StatusOK {
			t.Log("note: kagane answered a plain request 200 — the challenge is not up right now")
		}
	}

	f, err := NewBrowserFetcher(ws)
	if err != nil {
		t.Fatalf("NewBrowserFetcher: %v", err)
	}
	defer f.Close()

	ctx, cancel := context.WithTimeout(context.Background(), 90*time.Second)
	defer cancel()
	body, contentType, err := f.Image(ctx, imageID)
	if err != nil {
		t.Fatalf("Image: %v", err)
	}
	if len(body) < 1000 {
		t.Fatalf("body is %d bytes, want a real image", len(body))
	}
	if contentType != "image/webp" {
		t.Fatalf("content type = %q, want image/webp", contentType)
	}
	// WebP files start with "RIFF....WEBP".
	if string(body[:4]) != "RIFF" || string(body[8:12]) != "WEBP" {
		t.Fatalf("body is not a WebP: % x", body[:12])
	}
	t.Logf("fetched %d bytes of %s", len(body), contentType)

	if _, _, err := f.Image(ctx, "not-a-uuid"); err == nil {
		t.Fatal("Image accepted a non-uuid id")
	}
}

// Control for the test above: the poller's own kagane path, same sidecar. If
// this fails too, the sidecar is not clearing the challenge at all and the
// image result says nothing about Image itself.
func TestSmokeKaganeGet(t *testing.T) {
	ws := os.Getenv("SMOKE_BROWSER_WS_URL")
	if ws == "" {
		t.Skip("SMOKE_BROWSER_WS_URL unset")
	}
	f, err := NewBrowserFetcher(ws)
	if err != nil {
		t.Fatalf("NewBrowserFetcher: %v", err)
	}
	defer f.Close()

	ctx, cancel := context.WithTimeout(context.Background(), 90*time.Second)
	defer cancel()
	body, status, err := f.Get(ctx, "https://kagane.to/series/019fe11a-8670-7cf3-8343-0b02057d3787")
	if err != nil {
		t.Fatalf("Get: %v", err)
	}
	t.Logf("status=%d bytes=%d head=%.80q", status, len(body), body)
	if status != 200 {
		t.Fatalf("status = %d, want 200 — the sidecar is not clearing the challenge", status)
	}
}