package registry

import (
	"bytes"
	"io"
	"testing"
)

func TestAddPackageAndReadBack(t *testing.T) {
	store, err := New(t.TempDir())
	if err != nil {
		t.Fatal(err)
	}
	content := []byte("Scout 测试包")
	item, err := store.AddPackage(Package{
		Name:        "demo-core",
		Version:     "1.2.0",
		Description: "测试包",
	}, bytes.NewReader(content))
	if err != nil {
		t.Fatal(err)
	}
	if item.Size != int64(len(content)) {
		t.Fatalf("大小错误: %d", item.Size)
	}
	if item.SHA256 == "" {
		t.Fatal("没有生成 SHA-256")
	}
	latest, ok := store.Latest("demo-core")
	if !ok || latest.Version != "1.2.0" {
		t.Fatalf("最新版本错误: %+v", latest)
	}
	file, _, err := store.OpenPackage("demo-core", "1.2.0")
	if err != nil {
		t.Fatal(err)
	}
	defer file.Close()
	readBack, err := io.ReadAll(file)
	if err != nil {
		t.Fatal(err)
	}
	if !bytes.Equal(readBack, content) {
		t.Fatalf("文件内容错误: %q", readBack)
	}
}

func TestLatestUsesVersionOrder(t *testing.T) {
	store, err := New(t.TempDir())
	if err != nil {
		t.Fatal(err)
	}
	for _, version := range []string{"1.9.0", "1.10.0", "2.0.0"} {
		if _, err := store.AddPackage(Package{Name: "demo", Version: version}, bytes.NewReader([]byte(version))); err != nil {
			t.Fatal(err)
		}
	}
	latest, ok := store.Latest("demo")
	if !ok || latest.Version != "2.0.0" {
		t.Fatalf("版本排序错误: %+v", latest)
	}
	if CompareVersions("1.10.0", "1.9.0") <= 0 {
		t.Fatal("版本比较错误")
	}
}

func TestDuplicateVersionIsRejected(t *testing.T) {
	store, err := New(t.TempDir())
	if err != nil {
		t.Fatal(err)
	}
	input := Package{Name: "demo", Version: "1.0.0"}
	if _, err := store.AddPackage(input, bytes.NewReader([]byte("one"))); err != nil {
		t.Fatal(err)
	}
	if _, err := store.AddPackage(input, bytes.NewReader([]byte("two"))); err == nil {
		t.Fatal("重复版本没有被拒绝")
	}
}