package handlers

import (
	"testing"
	"time"
)

func TestDownloadDebouncer(t *testing.T) {
	d := NewDownloadDebouncer(time.Minute)
	if !d.ShouldAllow("user", "content") {
		t.Fatal("first request denied")
	}
	if d.ShouldAllow("user", "content") {
		t.Fatal("duplicate request allowed")
	}
	if !d.ShouldAllow("other", "content") {
		t.Fatal("different user denied")
	}
}

func TestTokenStoreCreateConsume(t *testing.T) {
	store := newTokenStore[SingleDownloadRequest]()
	req := SingleDownloadRequest{Image: "nginx:latest", Platform: "linux/amd64", UseCompressedLayers: true}

	token, err := store.create(req, "127.0.0.1", "ua")
	if err != nil {
		t.Fatal(err)
	}

	got, ok := store.consume(token, "127.0.0.1", "ua")
	if !ok {
		t.Fatal("token not consumed")
	}
	if got != req {
		t.Fatalf("request = %#v, want %#v", got, req)
	}
	if _, ok := store.consume(token, "127.0.0.1", "ua"); ok {
		t.Fatal("token consumed twice")
	}
}

func TestTokenStoreRejectsDifferentClient(t *testing.T) {
	store := newTokenStore[SingleDownloadRequest]()
	token, err := store.create(SingleDownloadRequest{Image: "nginx:latest"}, "127.0.0.1", "ua")
	if err != nil {
		t.Fatal(err)
	}
	if _, ok := store.consume(token, "127.0.0.2", "ua"); ok {
		t.Fatal("token accepted for different IP")
	}
}

func TestGenerateContentFingerprintStable(t *testing.T) {
	a := generateContentFingerprint([]string{"b:1", "a:1"}, "linux/amd64")
	b := generateContentFingerprint([]string{"a:1", "b:1"}, "linux/amd64")
	c := generateContentFingerprint([]string{"a:1", "b:1"}, "linux/arm64")
	if a != b || a == c {
		t.Fatalf("unexpected fingerprints: %q %q %q", a, b, c)
	}
}