package tree

import (
	"context"
	"testing"
	"time"

	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
	cidtest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id/test"
	oidtest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id/test"
	usertest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user/test"
	"github.com/stretchr/testify/require"
	"go.uber.org/zap/zaptest"
)

func TestLockConfigurationEncoding(t *testing.T) {
	for _, tc := range []struct {
		name            string
		encoded         string
		expectedEncoded string
		expected        data.ObjectLockConfiguration
		error           bool
	}{
		{
			name:            "empty",
			encoded:         "",
			expectedEncoded: "",
			expected:        data.ObjectLockConfiguration{},
		},
		{
			name:            "Enabled",
			encoded:         "Enabled",
			expectedEncoded: "Enabled",
			expected: data.ObjectLockConfiguration{
				ObjectLockEnabled: "Enabled",
			},
		},
		{
			name:            "Fully enabled",
			encoded:         "Enabled,10,COMPLIANCE,",
			expectedEncoded: "Enabled,10,COMPLIANCE,0",
			expected: data.ObjectLockConfiguration{
				ObjectLockEnabled: "Enabled",
				Rule: &data.ObjectLockRule{
					DefaultRetention: &data.DefaultRetention{
						Days: 10,
						Mode: "COMPLIANCE",
					},
				},
			},
		},
		{
			name:            "Missing numbers",
			encoded:         "Enabled,,COMPLIANCE,",
			expectedEncoded: "Enabled,0,COMPLIANCE,0",
			expected: data.ObjectLockConfiguration{
				ObjectLockEnabled: "Enabled",
				Rule: &data.ObjectLockRule{
					DefaultRetention: &data.DefaultRetention{
						Mode: "COMPLIANCE",
					},
				},
			},
		},
		{
			name:            "Missing all",
			encoded:         ",,,",
			expectedEncoded: ",0,,0",
			expected:        data.ObjectLockConfiguration{Rule: &data.ObjectLockRule{DefaultRetention: &data.DefaultRetention{}}},
		},
		{
			name:    "Invalid args",
			encoded: ",,",
			error:   true,
		},
		{
			name:    "Invalid days",
			encoded: ",a,,",
			error:   true,
		},
		{
			name:    "Invalid years",
			encoded: ",,,b",
			error:   true,
		},
	} {
		t.Run(tc.name, func(t *testing.T) {
			lockConfiguration, err := parseLockConfiguration(tc.encoded)
			if tc.error {
				require.Error(t, err)
				return
			}

			require.NoError(t, err)
			require.Equal(t, tc.expected, *lockConfiguration)

			encoded := encodeLockConfiguration(lockConfiguration)
			require.Equal(t, tc.expectedEncoded, encoded)
		})
	}
}

func TestTreeServiceSettings(t *testing.T) {
	ctx := context.Background()

	memCli, err := NewTreeServiceClientMemory()
	require.NoError(t, err)
	treeService := NewTree(memCli, zaptest.NewLogger(t))

	bktInfo := &data.BucketInfo{
		CID: cidtest.ID(),
	}

	settings := &data.BucketSettings{
		Versioning: "Versioning",
		LockConfiguration: &data.ObjectLockConfiguration{
			ObjectLockEnabled: "Enabled",
			Rule: &data.ObjectLockRule{
				DefaultRetention: &data.DefaultRetention{
					Days: 1,
					Mode: "mode",
				},
			},
		},
	}

	err = treeService.PutSettingsNode(ctx, bktInfo, settings)
	require.NoError(t, err)

	storedSettings, err := treeService.GetSettingsNode(ctx, bktInfo)
	require.NoError(t, err)
	require.Equal(t, settings, storedSettings)
}

func TestTreeServiceAddVersion(t *testing.T) {
	ctx := context.Background()

	memCli, err := NewTreeServiceClientMemory()
	require.NoError(t, err)
	treeService := NewTree(memCli, zaptest.NewLogger(t))

	bktInfo := &data.BucketInfo{
		CID: cidtest.ID(),
	}

	now := time.Now()
	version := &data.NodeVersion{
		BaseNodeVersion: data.BaseNodeVersion{
			OID:      oidtest.ID(),
			Size:     10,
			ETag:     "etag",
			FilePath: "path/to/version",
			Owner:    usertest.ID(),
			Created:  &now,
		},
		IsUnversioned: true,
	}

	nodeID, err := treeService.AddVersion(ctx, bktInfo, version)
	require.NoError(t, err)

	storedNode, err := treeService.GetUnversioned(ctx, bktInfo, "path/to/version")
	require.NoError(t, err)
	require.Equal(t, nodeID, storedNode.ID)
	require.Equal(t, version.BaseNodeVersion.Size, storedNode.Size)
	require.Equal(t, version.BaseNodeVersion.ETag, storedNode.ETag)
	require.Equal(t, version.BaseNodeVersion.ETag, storedNode.ETag)
	require.Equal(t, version.BaseNodeVersion.FilePath, storedNode.FilePath)
	require.Equal(t, version.BaseNodeVersion.OID, storedNode.OID)

	versions, err := treeService.GetVersions(ctx, bktInfo, "path/to/version")
	require.NoError(t, err)
	require.Len(t, versions, 1)
	require.Equal(t, storedNode, versions[0])
}

func TestGetLatestNode(t *testing.T) {
	for _, tc := range []struct {
		name           string
		nodes          []NodeResponse
		exceptedNodeID uint64
		error          bool
	}{
		{
			name:  "empty",
			nodes: []NodeResponse{},
			error: true,
		},
		{
			name: "one node of the object version",
			nodes: []NodeResponse{
				nodeResponse{
					nodeID:    1,
					parentID:  0,
					timestamp: 1,
					meta: []nodeMeta{
						{
							key:   oidKV,
							value: []byte(oidtest.ID().String()),
						},
					},
				},
			},
			exceptedNodeID: 1,
		},
		{
			name: "one node of the object version and one node of the secondary object",
			nodes: []NodeResponse{
				nodeResponse{
					nodeID:    2,
					parentID:  0,
					timestamp: 3,
					meta:      []nodeMeta{},
				},
				nodeResponse{
					nodeID:    1,
					parentID:  0,
					timestamp: 1,
					meta: []nodeMeta{
						{
							key:   oidKV,
							value: []byte(oidtest.ID().String()),
						},
					},
				},
			},
			exceptedNodeID: 1,
		},
		{
			name: "all nodes represent a secondary object",
			nodes: []NodeResponse{
				nodeResponse{
					nodeID:    2,
					parentID:  0,
					timestamp: 3,
					meta:      []nodeMeta{},
				},
				nodeResponse{
					nodeID:    4,
					parentID:  0,
					timestamp: 5,
					meta:      []nodeMeta{},
				},
			},
			error: true,
		},
		{
			name: "several nodes of different types and with different timestamp",
			nodes: []NodeResponse{
				nodeResponse{
					nodeID:    1,
					parentID:  0,
					timestamp: 1,
					meta: []nodeMeta{
						{
							key:   oidKV,
							value: []byte(oidtest.ID().String()),
						},
					},
				},
				nodeResponse{
					nodeID:    3,
					parentID:  0,
					timestamp: 3,
					meta:      []nodeMeta{},
				},
				nodeResponse{
					nodeID:    4,
					parentID:  0,
					timestamp: 4,
					meta: []nodeMeta{
						{
							key:   oidKV,
							value: []byte(oidtest.ID().String()),
						},
					},
				},
				nodeResponse{
					nodeID:    6,
					parentID:  0,
					timestamp: 6,
					meta:      []nodeMeta{},
				},
			},
			exceptedNodeID: 4,
		},
	} {
		t.Run(tc.name, func(t *testing.T) {
			actualNode, err := getLatestNode(tc.nodes)
			if tc.error {
				require.Error(t, err)
				return
			}

			require.NoError(t, err)
			require.Equal(t, tc.exceptedNodeID, actualNode.GetNodeID())
		})
	}
}