package company

import (
	"bytes"
	"image"
	"image/png"
	"os"
	"path/filepath"
	"strings"
	"testing"
	"time"

	"github.com/descrybe/descrybe-v2/apps/api/internal/security"
	"github.com/google/uuid"
)

func TestValidateLogoURL_HostedAndHTTPS(t *testing.T) {
	cid := uuid.MustParse("11111111-1111-1111-1111-111111111111")
	name := "22222222-2222-2222-2222-222222222222.png"

	got, err := ValidateLogoURL(BrandLogoURLPrefix+name, cid)
	if err != nil || got != BrandLogoURLPrefix+name {
		t.Fatalf("hosted: got=%q err=%v", got, err)
	}

	got, err = ValidateLogoURL("https://example.com/logo.png", cid)
	if err != nil || !strings.HasPrefix(got, "https://") {
		t.Fatalf("https: got=%q err=%v", got, err)
	}

	_, err = ValidateLogoURL(BrandLogoURLPrefix+"../etc/passwd", cid)
	if err == nil {
		t.Fatal("expected traversal reject")
	}

	_, err = ValidateLogoURL("/api/brand/logo/files/not-a-uuid.png", cid)
	if err == nil {
		t.Fatal("expected invalid name reject")
	}

	_, err = ValidateLogoURL("https://192.168.1.5/logo.png", cid)
	if err == nil || !(err == security.ErrBlockedURL || err == security.ErrBlockedHost) {
		t.Fatalf("expected blocked private host, got %v", err)
	}
}

func TestSaveAndResolveBrandLogo(t *testing.T) {
	dir := t.TempDir()
	cid := uuid.New()

	var buf bytes.Buffer
	img := image.NewRGBA(image.Rect(0, 0, 8, 8))
	if err := png.Encode(&buf, img); err != nil {
		t.Fatal(err)
	}

	logoURL, abs, ct, size, err := SaveBrandLogo(dir, cid, "mark.png", "image/png", bytes.NewReader(buf.Bytes()))
	if err != nil {
		t.Fatal(err)
	}
	if ct != "image/png" || size <= 0 {
		t.Fatalf("ct=%s size=%d", ct, size)
	}
	name, ok := HostedLogoFilename(logoURL)
	if !ok {
		t.Fatalf("logoURL=%s", logoURL)
	}
	if _, err := os.Stat(abs); err != nil {
		t.Fatal(err)
	}

	resolved, err := ResolveBrandLogoPath(dir, cid, name)
	if err != nil {
		t.Fatal(err)
	}
	if filepath.Clean(resolved) != filepath.Clean(abs) {
		t.Fatalf("resolved=%s abs=%s", resolved, abs)
	}

	// Wrong company must not resolve another company's file via path tricks.
	other := uuid.New()
	_, err = ResolveBrandLogoPath(dir, other, name)
	if err != nil {
		// file simply missing for other company is fine; open should 404
	}
	_, _, err = OpenBrandLogo(dir, other, name)
	if err != ErrLogoNotFound {
		t.Fatalf("expected not found for other company, got %v", err)
	}

	// Reject path traversal names.
	_, err = ResolveBrandLogoPath(dir, cid, "../../etc/passwd")
	if err != ErrLogoInvalidName {
		t.Fatalf("got %v", err)
	}
}

func TestSaveBrandLogo_RejectsNonImage(t *testing.T) {
	dir := t.TempDir()
	_, _, _, _, err := SaveBrandLogo(dir, uuid.New(), "x.png", "image/png", strings.NewReader("not-an-image"))
	if err != ErrLogoInvalidType {
		t.Fatalf("got %v", err)
	}
}

func TestSignAndVerifyPublicBrandLogo(t *testing.T) {
	cid := uuid.New()
	name := uuid.New().String() + ".png"
	secret := "test-secret"
	u, err := SignPublicBrandLogoURL("https://api.example.com", secret, cid, name, time.Hour)
	if err != nil {
		t.Fatal(err)
	}
	if !strings.Contains(u, PublicBrandLogoPathPrefix) {
		t.Fatalf("url=%s", u)
	}
	// Parse query
	exp := time.Now().Add(time.Hour).Unix()
	sig := signBrandLogo(secret, cid, name, exp)
	// Use exact exp from signed URL
	parts := strings.Split(u, "?")
	if len(parts) != 2 {
		t.Fatalf("url=%s", u)
	}
	q := map[string]string{}
	for _, kv := range strings.Split(parts[1], "&") {
		p := strings.SplitN(kv, "=", 2)
		if len(p) == 2 {
			q[p[0]] = p[1]
		}
	}
	expVal := mustParseInt(t, q["exp"])
	if err := VerifyPublicBrandLogoSig(secret, cid, name, expVal, q["sig"]); err != nil {
		t.Fatal(err)
	}
	if err := VerifyPublicBrandLogoSig(secret, cid, name, expVal, "deadbeef"); err != ErrLogoBadSig {
		t.Fatalf("got %v", err)
	}
	_ = sig
}

func mustParseInt(t *testing.T, s string) int64 {
	t.Helper()
	var n int64
	for _, c := range s {
		if c < '0' || c > '9' {
			t.Fatalf("bad int %q", s)
		}
		n = n*10 + int64(c-'0')
	}
	return n
}