package wallet

import (
	"strconv"
	"testing"
	"time"

	"github.com/stretchr/testify/require"

	"github.com/ethereum/go-ethereum/common"
	multiAccCommon "github.com/status-im/status-go/multiaccounts/common"
	"github.com/status-im/status-go/t/helpers"
	"github.com/status-im/status-go/walletdatabase"
)

const (
	ensMember int = iota
	isTestMember
	addressMember
)

func setupTestSavedAddressesDB(t *testing.T) (*SavedAddressesManager, func()) {
	db, err := helpers.SetupTestMemorySQLDB(walletdatabase.DbInitializer{})
	require.NoError(t, err)

	return &SavedAddressesManager{db}, func() {
		require.NoError(t, db.Close())
	}
}

func TestSavedAddressesAdd(t *testing.T) {
	manager, stop := setupTestSavedAddressesDB(t)
	defer stop()

	rst, err := manager.GetRawSavedAddresses()
	require.NoError(t, err)
	require.Nil(t, rst)

	sa := SavedAddress{
		Address:         common.Address{1},
		Name:            "Zilliqa",
		ChainShortNames: "eth:arb1:",
		ENSName:         "test.stateofus.eth",
		ColorID:         multiAccCommon.CustomizationColorGreen,
		IsTest:          false,
	}

	err = manager.UpdateMetadataAndUpsertSavedAddress(sa)
	require.NoError(t, err)

	rst, err = manager.GetRawSavedAddresses()
	require.NoError(t, err)
	require.Equal(t, 1, len(rst))
	require.Equal(t, sa.Address, rst[0].Address)
	require.Equal(t, sa.Name, rst[0].Name)
	require.Equal(t, sa.ChainShortNames, rst[0].ChainShortNames)
	require.Equal(t, sa.ENSName, rst[0].ENSName)
	require.Equal(t, sa.ColorID, rst[0].ColorID)
	require.Equal(t, sa.IsTest, rst[0].IsTest)
}

func contains[T comparable](container []T, element T, isEqual func(T, T) bool) bool {
	for _, e := range container {
		if isEqual(e, element) {
			return true
		}
	}
	return false
}

func haveSameElements[T comparable](a []T, b []T, isEqual func(T, T) bool) bool {
	for _, v := range a {
		if !contains(b, v, isEqual) {
			return false
		}
	}
	return true
}

func savedAddressDataIsEqual(a, b *SavedAddress) bool {
	return a.Address == b.Address && a.Name == b.Name && a.ChainShortNames == b.ChainShortNames &&
		a.ENSName == b.ENSName && a.IsTest == b.IsTest && a.ColorID == b.ColorID
}

func TestSavedAddressesMetadata(t *testing.T) {
	manager, stop := setupTestSavedAddressesDB(t)
	defer stop()

	savedAddresses, err := manager.GetRawSavedAddresses()
	require.NoError(t, err)
	require.Nil(t, savedAddresses)

	// Add raw saved addresses
	sa1 := SavedAddress{
		Address: common.Address{1},
		Name:    "Raw",
		savedAddressMeta: savedAddressMeta{
			UpdateClock: 234,
		},
		ChainShortNames: "eth:arb1:",
		ENSName:         "test.stateofus.eth",
		ColorID:         multiAccCommon.CustomizationColorGreen,
		IsTest:          false,
	}

	err = manager.upsertSavedAddress(sa1, nil)
	require.NoError(t, err)

	dbSavedAddresses, err := manager.GetRawSavedAddresses()
	require.NoError(t, err)
	require.Equal(t, 1, len(dbSavedAddresses))
	require.Equal(t, sa1.Address, dbSavedAddresses[0].Address)

	// Add simple saved address without sync metadata
	sa2 := SavedAddress{
		Address: common.Address{2},
		Name:    "Simple",
		ColorID: multiAccCommon.CustomizationColorBlue,
		IsTest:  false,
		savedAddressMeta: savedAddressMeta{
			UpdateClock: 42,
		},
	}

	err = manager.UpdateMetadataAndUpsertSavedAddress(sa2)
	require.NoError(t, err)

	dbSavedAddresses, err = manager.GetRawSavedAddresses()
	require.NoError(t, err)
	require.Equal(t, 2, len(dbSavedAddresses))
	// The order is not guaranteed check raw entry to decide
	rawIndex := 0
	simpleIndex := 1
	if dbSavedAddresses[0].Address == sa1.Address {
		rawIndex = 1
		simpleIndex = 0
	}
	require.Equal(t, sa1.Address, dbSavedAddresses[simpleIndex].Address)
	require.Equal(t, sa2.Address, dbSavedAddresses[rawIndex].Address)
	require.Equal(t, sa2.Name, dbSavedAddresses[rawIndex].Name)
	require.Equal(t, sa2.ColorID, dbSavedAddresses[rawIndex].ColorID)
	require.Equal(t, sa2.IsTest, dbSavedAddresses[rawIndex].IsTest)

	// Check the default values
	require.False(t, dbSavedAddresses[rawIndex].Removed)
	require.Equal(t, dbSavedAddresses[rawIndex].UpdateClock, sa2.UpdateClock)
	require.Greater(t, dbSavedAddresses[rawIndex].UpdateClock, uint64(0))

	sa2Older := sa2
	sa2Older.IsTest = false
	sa2Older.UpdateClock = dbSavedAddresses[rawIndex].UpdateClock - 1

	sa2Newer := sa2
	sa2Newer.IsTest = false
	sa2Newer.UpdateClock = dbSavedAddresses[rawIndex].UpdateClock + 1

	// Try to add an older entry
	updated := false
	updated, err = manager.AddSavedAddressIfNewerUpdate(sa2Older)
	require.NoError(t, err)
	require.False(t, updated)

	dbSavedAddresses, err = manager.GetRawSavedAddresses()
	require.NoError(t, err)

	rawIndex = 0
	simpleIndex = 1
	if dbSavedAddresses[0].Address == sa1.Address {
		rawIndex = 1
		simpleIndex = 0
	}

	require.Equal(t, 2, len(dbSavedAddresses))
	require.True(t, haveSameElements([]*SavedAddress{&sa1, &sa2}, dbSavedAddresses, savedAddressDataIsEqual))
	require.Equal(t, sa1.savedAddressMeta, dbSavedAddresses[simpleIndex].savedAddressMeta)

	// Try to update sa2 with a newer entry
	updatedClock := dbSavedAddresses[rawIndex].UpdateClock + 1
	updated, err = manager.AddSavedAddressIfNewerUpdate(sa2Newer)
	require.NoError(t, err)
	require.True(t, updated)

	dbSavedAddresses, err = manager.GetRawSavedAddresses()
	require.NoError(t, err)

	require.Equal(t, 2, len(dbSavedAddresses))
	require.True(t, haveSameElements([]*SavedAddress{&sa1, &sa2Newer}, dbSavedAddresses, savedAddressDataIsEqual))
	require.Equal(t, updatedClock, dbSavedAddresses[rawIndex].UpdateClock)

	// Try to delete the sa2 newer entry
	updatedDeleteClock := updatedClock + 1
	updated, err = manager.DeleteSavedAddress(sa2Newer.Address, sa2Newer.IsTest, updatedDeleteClock)
	require.NoError(t, err)
	require.True(t, updated)

	dbSavedAddresses, err = manager.GetRawSavedAddresses()
	require.NoError(t, err)

	require.Equal(t, 2, len(dbSavedAddresses))
	require.True(t, dbSavedAddresses[rawIndex].Removed)

	// Check that deleted entry is not returned with the regular API (non-raw)
	dbSavedAddresses, err = manager.GetSavedAddresses()
	require.NoError(t, err)
	require.Equal(t, 1, len(dbSavedAddresses))
}

func TestSavedAddressesCleanSoftDeletes(t *testing.T) {
	manager, stop := setupTestSavedAddressesDB(t)
	defer stop()

	firstTimestamp := 10
	for i := 0; i < 5; i++ {
		sa := SavedAddress{
			Address: common.Address{byte(i)},
			Name:    "Test" + strconv.Itoa(i),
			ColorID: multiAccCommon.CustomizationColorGreen,
			Removed: true,
			savedAddressMeta: savedAddressMeta{
				UpdateClock: uint64(firstTimestamp + i),
			},
		}

		err := manager.upsertSavedAddress(sa, nil)
		require.NoError(t, err)
	}

	err := manager.DeleteSoftRemovedSavedAddresses(uint64(firstTimestamp + 3))
	require.NoError(t, err)

	dbSavedAddresses, err := manager.GetRawSavedAddresses()
	require.NoError(t, err)
	require.Equal(t, 2, len(dbSavedAddresses))
	require.True(t, haveSameElements([]uint64{dbSavedAddresses[0].UpdateClock,
		dbSavedAddresses[1].UpdateClock}, []uint64{uint64(firstTimestamp + 3), uint64(firstTimestamp + 4)},
		func(a, b uint64) bool {
			return a == b
		},
	))
}

func TestSavedAddressesGet(t *testing.T) {
	manager, stop := setupTestSavedAddressesDB(t)
	defer stop()

	sa := SavedAddress{
		Address: common.Address{1},
		ENSName: "test.ens.eth",
		ColorID: multiAccCommon.CustomizationColorGreen,
		IsTest:  false,
		Removed: true,
	}

	err := manager.upsertSavedAddress(sa, nil)
	require.NoError(t, err)

	dbSavedAddresses, err := manager.GetRawSavedAddresses()
	require.NoError(t, err)
	require.Equal(t, 1, len(dbSavedAddresses))

	require.True(t, savedAddressDataIsEqual(&sa, dbSavedAddresses[0]))

	dbSavedAddresses, err = manager.GetSavedAddresses()
	require.NoError(t, err)
	require.Equal(t, 0, len(dbSavedAddresses))
}

func TestSavedAddressesDelete(t *testing.T) {
	manager, stop := setupTestSavedAddressesDB(t)
	defer stop()

	sa0 := SavedAddress{
		Address: common.Address{1},
		IsTest:  false,
	}

	err := manager.upsertSavedAddress(sa0, nil)
	require.NoError(t, err)

	rst, err := manager.GetRawSavedAddresses()
	require.NoError(t, err)
	require.Equal(t, 1, len(rst))

	require.True(t, savedAddressDataIsEqual(&sa0, rst[0]))

	// Modify IsTest flag, insert
	sa1 := sa0
	sa1.IsTest = !sa1.IsTest

	err = manager.upsertSavedAddress(sa1, nil)
	require.NoError(t, err)

	// Delete s0, test that only s1 is left
	updateClock := uint64(time.Now().Unix())
	_, err = manager.DeleteSavedAddress(sa0.Address, sa0.IsTest, updateClock)
	require.NoError(t, err)

	rst, err = manager.GetSavedAddresses()
	require.NoError(t, err)
	require.Equal(t, 1, len(rst))
	require.True(t, savedAddressDataIsEqual(&sa1, rst[0]))

	// Test that we still have both addresses
	rst, err = manager.GetRawSavedAddresses()
	require.NoError(t, err)
	require.Equal(t, 2, len(rst))

	// Delete s0 one more time with the same timestamp
	deleted, err := manager.DeleteSavedAddress(sa0.Address, sa0.IsTest, updateClock)
	require.NoError(t, err)
	require.False(t, deleted)
}

func testInsertSameAddressWithOneChange(t *testing.T, member int) {
	manager, stop := setupTestSavedAddressesDB(t)
	defer stop()

	// Insert one address
	sa := SavedAddress{
		Address: common.Address{1},
		ENSName: "test.ens.eth",
		IsTest:  true,
	}

	err := manager.upsertSavedAddress(sa, nil)
	require.NoError(t, err)

	rst, err := manager.GetRawSavedAddresses()
	require.NoError(t, err)
	require.Equal(t, 1, len(rst))

	require.True(t, savedAddressDataIsEqual(&sa, rst[0]))

	sa2 := sa

	if member == isTestMember {
		sa2.IsTest = !sa2.IsTest
	} else if member == addressMember {
		sa2.Address = common.Address{7}
	} else if member == ensMember {
		sa2.ENSName += "_"
	} else {
		t.Error("Unsupported member change. Please add it to the list")
	}

	err = manager.upsertSavedAddress(sa2, nil)
	require.NoError(t, err)

	rst, err = manager.GetRawSavedAddresses()
	require.NoError(t, err)
	require.Equal(t, 2, len(rst))

	// The order of records returned by GetRawSavedAddresses is not
	// guaranteed to be the same as insertions, so swap indices if first record does not match
	firstIndex := 0
	secondIndex := 1
	if rst[firstIndex].Address == sa.Address {
		firstIndex = 1
		secondIndex = 0
	}
	require.True(t, savedAddressDataIsEqual(&sa, rst[firstIndex]))
	require.True(t, savedAddressDataIsEqual(&sa2, rst[secondIndex]))
}

func TestSavedAddressesAddDifferentIsTest(t *testing.T) {
	testInsertSameAddressWithOneChange(t, isTestMember)
}

func TestSavedAddressesAddSame(t *testing.T) {
	manager, stop := setupTestSavedAddressesDB(t)
	defer stop()

	// Insert one address
	sa := SavedAddress{
		Address: common.Address{1},
		ENSName: "test.ens.eth",
		IsTest:  true,
	}

	err := manager.upsertSavedAddress(sa, nil)
	require.NoError(t, err)

	rst, err := manager.GetRawSavedAddresses()
	require.NoError(t, err)
	require.Equal(t, 1, len(rst))

	require.True(t, savedAddressDataIsEqual(&sa, rst[0]))

	sa2 := sa
	err = manager.upsertSavedAddress(sa2, nil)
	require.NoError(t, err)

	rst, err = manager.GetRawSavedAddresses()
	require.NoError(t, err)
	require.Equal(t, 1, len(rst))
}

func TestSavedAddressesPerTestnetMode(t *testing.T) {
	manager, stop := setupTestSavedAddressesDB(t)
	defer stop()

	addresses := []SavedAddress{
		SavedAddress{
			Address: common.Address{1},
			Name:    "addr1",
			IsTest:  true,
		},
		SavedAddress{
			Address: common.Address{2},
			Name:    "addr2",
			IsTest:  false,
		},
		SavedAddress{
			Address: common.Address{3},
			Name:    "addr3",
			IsTest:  true,
		},
		SavedAddress{
			Address: common.Address{4},
			Name:    "addr4",
			IsTest:  false,
		},
		SavedAddress{
			Address: common.Address{5},
			Name:    "addr5",
			IsTest:  true,
			Removed: true,
		},
		SavedAddress{
			Address: common.Address{6},
			Name:    "addr6",
			IsTest:  false,
			Removed: true,
		},
		SavedAddress{
			Address: common.Address{7},
			Name:    "addr7",
			IsTest:  true,
		},
	}

	for _, sa := range addresses {
		err := manager.upsertSavedAddress(sa, nil)
		require.NoError(t, err)
	}

	res, err := manager.GetSavedAddresses()
	require.NoError(t, err)
	require.Equal(t, len(res), len(addresses)-2)

	res, err = manager.GetSavedAddressesPerMode(true)
	require.NoError(t, err)
	require.Equal(t, len(res), 3)

	res, err = manager.GetSavedAddressesPerMode(false)
	require.NoError(t, err)
	require.Equal(t, len(res), 2)
}

func TestSavedAddressesCapacity(t *testing.T) {
	manager, stop := setupTestSavedAddressesDB(t)
	defer stop()

	addresses := []SavedAddress{
		SavedAddress{
			Address: common.Address{1},
			Name:    "addr1",
			IsTest:  true,
		},
		SavedAddress{
			Address: common.Address{2},
			Name:    "addr2",
			IsTest:  false,
		},
		SavedAddress{
			Address: common.Address{3},
			Name:    "addr3",
			IsTest:  true,
		},
		SavedAddress{
			Address: common.Address{4},
			Name:    "addr4",
			IsTest:  false,
		},
		SavedAddress{
			Address: common.Address{5},
			Name:    "addr5",
			IsTest:  true,
			Removed: true,
		},
		SavedAddress{
			Address: common.Address{6},
			Name:    "addr6",
			IsTest:  false,
			Removed: true,
		},
		SavedAddress{
			Address: common.Address{7},
			Name:    "addr7",
			IsTest:  true,
		},
	}

	for _, sa := range addresses {
		err := manager.upsertSavedAddress(sa, nil)
		require.NoError(t, err)
	}

	capacity, err := manager.RemainingCapacityForSavedAddresses(true)
	require.NoError(t, err)
	require.Equal(t, 17, capacity)

	capacity, err = manager.RemainingCapacityForSavedAddresses(false)
	require.NoError(t, err)
	require.Equal(t, 18, capacity)

	// add 17 more for testnet and 18 more for mainnet mode
	for i := 1; i < 36; i++ {
		sa := SavedAddress{
			Address: common.Address{byte(i + 8)},
			Name:    "addr" + strconv.Itoa(i+8),
			IsTest:  i%2 == 0,
		}

		err := manager.upsertSavedAddress(sa, nil)
		require.NoError(t, err)
	}

	capacity, err = manager.RemainingCapacityForSavedAddresses(true)
	require.Error(t, err)
	require.Equal(t, "no more save addresses can be added", err.Error())
	require.Equal(t, 0, capacity)

	capacity, err = manager.RemainingCapacityForSavedAddresses(false)
	require.Error(t, err)
	require.Equal(t, "no more save addresses can be added", err.Error())
	require.Equal(t, 0, capacity)
}