package layer

import (
	"net/http"
	"strconv"
	"testing"
	"time"

	cid "github.com/nspcc-dev/neofs-api-go/pkg/container/id"
	"github.com/nspcc-dev/neofs-api-go/pkg/object"
	"github.com/nspcc-dev/neofs-api-go/pkg/owner"
	"github.com/nspcc-dev/neofs-s3-gw/api/cache"
	"github.com/stretchr/testify/require"
)

var (
	defaultTestCreated       = time.Now()
	defaultTestPayload       = []byte("test object payload")
	defaultTestPayloadLength = int64(len(defaultTestPayload))
	defaultTestContentType   = http.DetectContentType(defaultTestPayload)
)

func newTestObject(oid *object.ID, bkt *cache.BucketInfo, name string) *object.Object {
	filename := object.NewAttribute()
	filename.SetKey(object.AttributeFileName)
	filename.SetValue(name)

	created := object.NewAttribute()
	created.SetKey(object.AttributeTimestamp)
	created.SetValue(strconv.FormatInt(defaultTestCreated.Unix(), 10))

	contentType := object.NewAttribute()
	contentType.SetKey(object.AttributeContentType)
	contentType.SetValue(defaultTestContentType)

	raw := object.NewRaw()
	raw.SetID(oid)
	raw.SetOwnerID(bkt.Owner)
	raw.SetContainerID(bkt.CID)
	raw.SetPayload(defaultTestPayload)
	raw.SetAttributes(filename, created, contentType)
	raw.SetPayloadSize(uint64(defaultTestPayloadLength))

	return raw.Object()
}

func newTestInfo(oid *object.ID, bkt *cache.BucketInfo, name string, isDir bool) *ObjectInfo {
	info := &ObjectInfo{
		id:          oid,
		Name:        name,
		Bucket:      bkt.Name,
		bucketID:    bkt.CID,
		Size:        defaultTestPayloadLength,
		ContentType: defaultTestContentType,
		Created:     time.Unix(defaultTestCreated.Unix(), 0),
		Owner:       bkt.Owner,
		Headers:     make(map[string]string),
	}

	if isDir {
		info.isDir = true
		info.Size = 0
		info.ContentType = ""
		info.Headers = nil
	}

	return info
}

func Test_objectInfoFromMeta(t *testing.T) {
	uid := owner.NewID()
	oid := object.NewID()
	containerID := cid.New()

	bkt := &cache.BucketInfo{
		Name:    "test-container",
		CID:     containerID,
		Owner:   uid,
		Created: time.Now(),
	}

	cases := []struct {
		name      string
		prefix    string
		result    *ObjectInfo
		object    *object.Object
		delimiter string
	}{
		{
			name:   "small.jpg",
			result: newTestInfo(oid, bkt, "small.jpg", false),
			object: newTestObject(oid, bkt, "small.jpg"),
		},
		{
			name:   "small.jpg not matched prefix",
			prefix: "big",
			result: nil,
			object: newTestObject(oid, bkt, "small.jpg"),
		},
		{
			name:      "small.jpg delimiter",
			delimiter: "/",
			result:    newTestInfo(oid, bkt, "small.jpg", false),
			object:    newTestObject(oid, bkt, "small.jpg"),
		},
		{
			name:   "test/small.jpg",
			result: newTestInfo(oid, bkt, "test/small.jpg", false),
			object: newTestObject(oid, bkt, "test/small.jpg"),
		},
		{
			name:      "test/small.jpg with prefix and delimiter",
			prefix:    "test/",
			delimiter: "/",
			result:    newTestInfo(oid, bkt, "test/small.jpg", false),
			object:    newTestObject(oid, bkt, "test/small.jpg"),
		},
		{
			name:   "a/b/small.jpg",
			prefix: "a",
			result: newTestInfo(oid, bkt, "a/b/small.jpg", false),
			object: newTestObject(oid, bkt, "a/b/small.jpg"),
		},
		{
			name:      "a/b/small.jpg",
			prefix:    "a/",
			delimiter: "/",
			result:    newTestInfo(oid, bkt, "a/b/", true),
			object:    newTestObject(oid, bkt, "a/b/small.jpg"),
		},
		{
			name:      "a/b/c/small.jpg",
			prefix:    "a/",
			delimiter: "/",
			result:    newTestInfo(oid, bkt, "a/b/", true),
			object:    newTestObject(oid, bkt, "a/b/c/small.jpg"),
		},
		{
			name:      "a/b/c/small.jpg",
			prefix:    "a/b/c/s",
			delimiter: "/",
			result:    newTestInfo(oid, bkt, "a/b/c/small.jpg", false),
			object:    newTestObject(oid, bkt, "a/b/c/small.jpg"),
		},
		{
			name:      "a/b/c/big.jpg",
			prefix:    "a/b/",
			delimiter: "/",
			result:    newTestInfo(oid, bkt, "a/b/c/", true),
			object:    newTestObject(oid, bkt, "a/b/c/big.jpg"),
		},
	}

	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			info := objectInfoFromMeta(bkt, tc.object, tc.prefix, tc.delimiter)
			require.Equal(t, tc.result, info)
		})
	}
}