// Copyright (C) 2019 Storj Labs, Inc.
// See LICENSE for copying information.

package piecestore_test

import (
	"math/rand"
	"testing"
	"time"

	"github.com/google/go-cmp/cmp"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"

	"storj.io/storj/internal/testcontext"
	"storj.io/storj/internal/testplanet"
	"storj.io/storj/pkg/storj"
	"storj.io/storj/storagenode"
	"storj.io/storj/storagenode/storagenodedb/storagenodedbtest"
)

func TestUsedSerials(t *testing.T) {
	storagenodedbtest.Run(t, func(t *testing.T, db storagenode.DB) {
		ctx := testcontext.New(t)
		defer ctx.Cleanup()

		usedSerials := db.UsedSerials()

		node0 := testplanet.MustPregeneratedIdentity(0)
		node1 := testplanet.MustPregeneratedIdentity(1)

		serial1 := newRandomSerial()
		serial2 := newRandomSerial()
		serial3 := newRandomSerial()

		now := time.Now()

		// queries on empty table
		err := usedSerials.DeleteExpired(ctx, now.Add(6*time.Minute))
		assert.NoError(t, err)

		err = usedSerials.IterateAll(ctx, func(satellite storj.NodeID, serialNumber []byte, expiration time.Time) {})
		assert.NoError(t, err)

		// let's start adding data
		type Serial struct {
			SatelliteID  storj.NodeID
			SerialNumber []byte
			Expiration   time.Time
		}

		serialNumbers := []Serial{
			{node0.ID, serial1, now.Add(time.Minute)},
			{node0.ID, serial2, now.Add(4 * time.Minute)},
			{node0.ID, serial3, now.Add(8 * time.Minute)},
			{node1.ID, serial1, now.Add(time.Minute)},
			{node1.ID, serial2, now.Add(4 * time.Minute)},
			{node1.ID, serial3, now.Add(8 * time.Minute)},
		}

		// basic adding
		for _, serial := range serialNumbers {
			err = usedSerials.Add(ctx, serial.SatelliteID, serial.SerialNumber, serial.Expiration)
			assert.NoError(t, err)
		}

		// duplicate adds should fail
		for _, serial := range serialNumbers {
			expirationDelta := time.Duration(rand.Intn(10)-5) * time.Hour
			err = usedSerials.Add(ctx, serial.SatelliteID, serial.SerialNumber, serial.Expiration.Add(expirationDelta))
			assert.Error(t, err)
		}

		// ensure we can list all of them
		listedNumbers := []Serial{}
		err = usedSerials.IterateAll(ctx, func(satellite storj.NodeID, serialNumber []byte, expiration time.Time) {
			listedNumbers = append(listedNumbers, Serial{satellite, serialNumber, expiration})
		})

		require.NoError(t, err)
		assert.Empty(t, cmp.Diff(serialNumbers, listedNumbers))

		// ensure we can delete expired
		err = usedSerials.DeleteExpired(ctx, now.Add(6*time.Minute))
		require.NoError(t, err)

		// ensure we can list after delete
		listedAfterDelete := []Serial{}
		err = usedSerials.IterateAll(ctx, func(satellite storj.NodeID, serialNumber []byte, expiration time.Time) {
			listedAfterDelete = append(listedAfterDelete, Serial{satellite, serialNumber, expiration})
		})

		// check that we have actually deleted things
		require.NoError(t, err)
		assert.Empty(t, cmp.Diff([]Serial{
			{node0.ID, serial3, now.Add(8 * time.Minute)},
			{node1.ID, serial3, now.Add(8 * time.Minute)},
		}, listedAfterDelete))
	})
}

func newRandomSerial() []byte {
	var serial [16]byte
	_, _ = rand.Read(serial[:])
	return serial[:]
}