// Copyright (C) 2021 Storj Labs, Inc.
// See LICENSE for copying information.

package metabasetest

import (
	"testing"
	"time"

	"storj.io/common/storj"
	"storj.io/common/testcontext"
	"storj.io/common/testrand"
	"storj.io/common/uuid"
	"storj.io/storj/satellite/metabase"
)

// RandObjectStream returns a random object stream.
func RandObjectStream() metabase.ObjectStream {
	return metabase.ObjectStream{
		ProjectID:  testrand.UUID(),
		BucketName: testrand.BucketName(),
		ObjectKey:  metabase.ObjectKey(testrand.Bytes(16)),
		Version:    1,
		StreamID:   testrand.UUID(),
	}
}

// CreatePendingObject creates a new pending object with the specified number of segments.
func CreatePendingObject(ctx *testcontext.Context, t *testing.T, db *metabase.DB, obj metabase.ObjectStream, numberOfSegments byte) {
	BeginObjectExactVersion{
		Opts: metabase.BeginObjectExactVersion{
			ObjectStream: obj,
			Encryption:   DefaultEncryption,
		},
		Version: obj.Version,
	}.Check(ctx, t, db)

	for i := byte(0); i < numberOfSegments; i++ {
		BeginSegment{
			Opts: metabase.BeginSegment{
				ObjectStream: obj,
				Position:     metabase.SegmentPosition{Part: 0, Index: uint32(i)},
				RootPieceID:  storj.PieceID{i + 1},
				Pieces: []metabase.Piece{{
					Number:      1,
					StorageNode: testrand.NodeID(),
				}},
			},
		}.Check(ctx, t, db)

		CommitSegment{
			Opts: metabase.CommitSegment{
				ObjectStream: obj,
				Position:     metabase.SegmentPosition{Part: 0, Index: uint32(i)},
				RootPieceID:  storj.PieceID{1},
				Pieces:       metabase.Pieces{{Number: 0, StorageNode: storj.NodeID{2}}},

				EncryptedKey:      []byte{3},
				EncryptedKeyNonce: []byte{4},
				EncryptedETag:     []byte{5},

				EncryptedSize: 1024,
				PlainSize:     512,
				PlainOffset:   0,
				Redundancy:    DefaultRedundancy,
			},
		}.Check(ctx, t, db)
	}
}

// CreateObject creates a new committed object with the specified number of segments.
func CreateObject(ctx *testcontext.Context, t *testing.T, db *metabase.DB, obj metabase.ObjectStream, numberOfSegments byte) metabase.Object {
	BeginObjectExactVersion{
		Opts: metabase.BeginObjectExactVersion{
			ObjectStream: obj,
			Encryption:   DefaultEncryption,
		},
		Version: obj.Version,
	}.Check(ctx, t, db)

	for i := byte(0); i < numberOfSegments; i++ {
		BeginSegment{
			Opts: metabase.BeginSegment{
				ObjectStream: obj,
				Position:     metabase.SegmentPosition{Part: 0, Index: uint32(i)},
				RootPieceID:  storj.PieceID{i + 1},
				Pieces: []metabase.Piece{{
					Number:      1,
					StorageNode: testrand.NodeID(),
				}},
			},
		}.Check(ctx, t, db)

		CommitSegment{
			Opts: metabase.CommitSegment{
				ObjectStream: obj,
				Position:     metabase.SegmentPosition{Part: 0, Index: uint32(i)},
				RootPieceID:  storj.PieceID{1},
				Pieces:       metabase.Pieces{{Number: 0, StorageNode: storj.NodeID{2}}},

				EncryptedKey:      []byte{3},
				EncryptedKeyNonce: []byte{4},
				EncryptedETag:     []byte{5},

				EncryptedSize: 1024,
				PlainSize:     512,
				PlainOffset:   0,
				Redundancy:    DefaultRedundancy,
			},
		}.Check(ctx, t, db)
	}

	return CommitObject{
		Opts: metabase.CommitObject{
			ObjectStream: obj,
		},
	}.Check(ctx, t, db)
}

// CreateExpiredObject creates a new committed expired object with the specified number of segments.
func CreateExpiredObject(ctx *testcontext.Context, t *testing.T, db *metabase.DB, obj metabase.ObjectStream, numberOfSegments byte, expiresAt time.Time) metabase.Object {
	BeginObjectExactVersion{
		Opts: metabase.BeginObjectExactVersion{
			ObjectStream: obj,
			Encryption:   DefaultEncryption,
			ExpiresAt:    &expiresAt,
		},
		Version: obj.Version,
	}.Check(ctx, t, db)

	for i := byte(0); i < numberOfSegments; i++ {
		BeginSegment{
			Opts: metabase.BeginSegment{
				ObjectStream: obj,
				Position:     metabase.SegmentPosition{Part: 0, Index: uint32(i)},
				RootPieceID:  storj.PieceID{i + 1},
				Pieces: []metabase.Piece{{
					Number:      1,
					StorageNode: testrand.NodeID(),
				}},
			},
		}.Check(ctx, t, db)

		CommitSegment{
			Opts: metabase.CommitSegment{
				ObjectStream: obj,
				Position:     metabase.SegmentPosition{Part: 0, Index: uint32(i)},
				RootPieceID:  storj.PieceID{1},
				Pieces:       metabase.Pieces{{Number: 0, StorageNode: storj.NodeID{2}}},

				EncryptedKey:      []byte{3},
				EncryptedKeyNonce: []byte{4},
				EncryptedETag:     []byte{5},

				EncryptedSize: 1024,
				PlainSize:     512,
				PlainOffset:   0,
				Redundancy:    DefaultRedundancy,
			},
		}.Check(ctx, t, db)
	}

	return CommitObject{
		Opts: metabase.CommitObject{
			ObjectStream: obj,
		},
	}.Check(ctx, t, db)
}

// CreateFullObjectsWithKeys creates multiple objects with the specified keys.
func CreateFullObjectsWithKeys(ctx *testcontext.Context, t *testing.T, db *metabase.DB, projectID uuid.UUID, bucketName string, keys []metabase.ObjectKey) map[metabase.ObjectKey]metabase.LoopObjectEntry {
	objects := make(map[metabase.ObjectKey]metabase.LoopObjectEntry, len(keys))
	for _, key := range keys {
		obj := RandObjectStream()
		obj.ProjectID = projectID
		obj.BucketName = bucketName
		obj.ObjectKey = key

		CreateObject(ctx, t, db, obj, 0)

		objects[key] = metabase.LoopObjectEntry{
			ObjectStream: obj,
			Status:       metabase.Committed,
			CreatedAt:    time.Now(),
		}
	}

	return objects
}

// CreateTestObject is for testing metabase.CreateTestObject.
type CreateTestObject struct {
	BeginObjectExactVersion *metabase.BeginObjectExactVersion
	CommitObject            *metabase.CommitObject
	// TODO add BeginSegment, CommitSegment
}

// Run runs the test.
func (co CreateTestObject) Run(ctx *testcontext.Context, t testing.TB, db *metabase.DB, obj metabase.ObjectStream, numberOfSegments byte) metabase.Object {
	boeOpts := metabase.BeginObjectExactVersion{
		ObjectStream: obj,
		Encryption:   DefaultEncryption,
	}
	if co.BeginObjectExactVersion != nil {
		boeOpts = *co.BeginObjectExactVersion
	}

	BeginObjectExactVersion{
		Opts:    boeOpts,
		Version: obj.Version,
	}.Check(ctx, t, db)

	for i := byte(0); i < numberOfSegments; i++ {
		BeginSegment{
			Opts: metabase.BeginSegment{
				ObjectStream: obj,
				Position:     metabase.SegmentPosition{Part: 0, Index: uint32(i)},
				RootPieceID:  storj.PieceID{i + 1},
				Pieces: []metabase.Piece{{
					Number:      1,
					StorageNode: testrand.NodeID(),
				}},
			},
		}.Check(ctx, t, db)

		CommitSegment{
			Opts: metabase.CommitSegment{
				ObjectStream: obj,
				Position:     metabase.SegmentPosition{Part: 0, Index: uint32(i)},
				RootPieceID:  storj.PieceID{1},
				Pieces:       metabase.Pieces{{Number: 0, StorageNode: storj.NodeID{2}}},

				EncryptedKey:      []byte{3},
				EncryptedKeyNonce: []byte{4},
				EncryptedETag:     []byte{5},

				EncryptedSize: 1060,
				PlainSize:     512,
				PlainOffset:   int64(i) * 512,
				Redundancy:    DefaultRedundancy,
			},
		}.Check(ctx, t, db)
	}

	coOpts := metabase.CommitObject{
		ObjectStream: obj,
	}
	if co.CommitObject != nil {
		coOpts = *co.CommitObject
	}

	return CommitObject{
		Opts: coOpts,
	}.Check(ctx, t, db)
}