package cursor

import (
	"errors"
	"os"
	"path/filepath"
	"strings"
	"testing"
)

func TestCommandErrorIncludesOutput(t *testing.T) {
	err := commandError("汉化包执行失败", "汉化未完成：测试错误", errors.New("exit status 1"))
	if err == nil || !strings.Contains(err.Error(), "exit status 1") || !strings.Contains(err.Error(), "汉化未完成：测试错误") {
		t.Fatalf("command output missing from error: %v", err)
	}
}

func TestCommandOutputDetailLimitsLength(t *testing.T) {
	detail := commandOutputDetail(strings.Repeat("汉", 4100))
	if !strings.HasPrefix(detail, "…") {
		t.Fatal("expected truncation marker")
	}
	if got := len([]rune(detail)); got != 4001 {
		t.Fatalf("unexpected detail length: %d", got)
	}
}

func TestOverrideEnvironmentRestoresValues(t *testing.T) {
	t.Run("existing", func(t *testing.T) {
		key := "LOCALIZE_TEST_REGISTRY_EXISTING"
		t.Setenv(key, "https://mirror.example.com")
		restore := overrideEnvironment([]string{key}, officialNPMRegistry)
		if got := os.Getenv(key); got != officialNPMRegistry {
			t.Fatalf("override not applied: %s", got)
		}
		restore()
		if got := os.Getenv(key); got != "https://mirror.example.com" {
			t.Fatalf("original value not restored: %s", got)
		}
	})

	t.Run("missing", func(t *testing.T) {
		key := "LOCALIZE_TEST_REGISTRY_MISSING"
		t.Setenv(key, "placeholder")
		if err := os.Unsetenv(key); err != nil {
			t.Fatal(err)
		}
		restore := overrideEnvironment([]string{key}, officialNPMRegistry)
		restore()
		if _, exists := os.LookupEnv(key); exists {
			t.Fatal("missing environment variable was not removed")
		}
	})
}

func TestFindNodeCLI(t *testing.T) {
	nodeDir := t.TempDir()
	binDir := filepath.Join(nodeDir, "node_modules", "npm", "bin")
	if err := os.MkdirAll(binDir, 0o755); err != nil {
		t.Fatal(err)
	}
	npxCLI := filepath.Join(binDir, "npx-cli.js")
	if err := os.WriteFile(npxCLI, []byte("// test\n"), 0o644); err != nil {
		t.Fatal(err)
	}
	nodePath := filepath.Join(nodeDir, "node.exe")
	if got := findNodeCLI(nodePath, "npx-cli.js"); got != npxCLI {
		t.Fatalf("unexpected npx CLI path: %s", got)
	}
}