package keys

import (
	"bytes"
	"context"
	"fmt"
	"io/ioutil"
	"testing"

	"github.com/stretchr/testify/require"

	"github.com/tendermint/tendermint/libs/cli"

	"github.com/cosmos/cosmos-sdk/client"
	"github.com/cosmos/cosmos-sdk/client/flags"
	"github.com/cosmos/cosmos-sdk/crypto/hd"
	"github.com/cosmos/cosmos-sdk/crypto/keyring"
	"github.com/cosmos/cosmos-sdk/simapp"
	"github.com/cosmos/cosmos-sdk/testutil"
	sdk "github.com/cosmos/cosmos-sdk/types"
	bip39 "github.com/cosmos/go-bip39"
)

func Test_runAddCmdBasic(t *testing.T) {
	cmd := AddKeyCommand()
	cmd.Flags().AddFlagSet(Commands("home").PersistentFlags())

	mockIn := testutil.ApplyMockIODiscardOutErr(cmd)
	kbHome := t.TempDir()

	cdc := simapp.MakeTestEncodingConfig().Codec

	kb, err := keyring.New(sdk.KeyringServiceName(), keyring.BackendTest, kbHome, mockIn, cdc)
	require.NoError(t, err)

	clientCtx := client.Context{}.WithKeyringDir(kbHome).WithInput(mockIn).WithCodec(cdc)
	ctx := context.WithValue(context.Background(), client.ClientContextKey, &clientCtx)

	t.Cleanup(func() {
		_ = kb.Delete("keyname1")
		_ = kb.Delete("keyname2")
	})

	cmd.SetArgs([]string{
		"keyname1",
		fmt.Sprintf("--%s=%s", flags.FlagHome, kbHome),
		fmt.Sprintf("--%s=%s", cli.OutputFlag, OutputFormatText),
		fmt.Sprintf("--%s=%s", flags.FlagKeyAlgorithm, string(hd.Secp256k1Type)),
		fmt.Sprintf("--%s=%s", flags.FlagKeyringBackend, keyring.BackendTest),
	})
	mockIn.Reset("y\n")
	require.NoError(t, cmd.ExecuteContext(ctx))

	mockIn.Reset("N\n")
	require.Error(t, cmd.ExecuteContext(ctx))

	cmd.SetArgs([]string{
		"keyname2",
		fmt.Sprintf("--%s=%s", flags.FlagHome, kbHome),
		fmt.Sprintf("--%s=%s", cli.OutputFlag, OutputFormatText),
		fmt.Sprintf("--%s=%s", flags.FlagKeyAlgorithm, string(hd.Secp256k1Type)),
		fmt.Sprintf("--%s=%s", flags.FlagKeyringBackend, keyring.BackendTest),
	})

	require.NoError(t, cmd.ExecuteContext(ctx))
	require.Error(t, cmd.ExecuteContext(ctx))

	mockIn.Reset("y\n")
	require.NoError(t, cmd.ExecuteContext(ctx))

	cmd.SetArgs([]string{
		"keyname4",
		fmt.Sprintf("--%s=%s", flags.FlagHome, kbHome),
		fmt.Sprintf("--%s=%s", cli.OutputFlag, OutputFormatText),
		fmt.Sprintf("--%s=%s", flags.FlagKeyAlgorithm, string(hd.Secp256k1Type)),
		fmt.Sprintf("--%s=%s", flags.FlagKeyringBackend, keyring.BackendTest),
	})

	require.NoError(t, cmd.ExecuteContext(ctx))
	require.Error(t, cmd.ExecuteContext(ctx))

	cmd.SetArgs([]string{
		"keyname5",
		fmt.Sprintf("--%s=%s", flags.FlagHome, kbHome),
		fmt.Sprintf("--%s=true", flags.FlagDryRun),
		fmt.Sprintf("--%s=%s", cli.OutputFlag, OutputFormatText),
		fmt.Sprintf("--%s=%s", flags.FlagKeyAlgorithm, string(hd.Secp256k1Type)),
	})

	require.NoError(t, cmd.ExecuteContext(ctx))

	// In recovery mode
	cmd.SetArgs([]string{
		"keyname6",
		fmt.Sprintf("--%s=true", flagRecover),
	})

	// use valid mnemonic and complete recovery key generation successfully
	mockIn.Reset("decide praise business actor peasant farm drastic weather extend front hurt later song give verb rhythm worry fun pond reform school tumble august one\n")
	require.NoError(t, cmd.ExecuteContext(ctx))

	// use invalid mnemonic and fail recovery key generation
	mockIn.Reset("invalid mnemonic\n")
	require.Error(t, cmd.ExecuteContext(ctx))

	// In interactive mode
	cmd.SetArgs([]string{
		"keyname7",
		"-i",
		fmt.Sprintf("--%s=false", flagRecover),
	})

	const password = "password1!"

	// set password and complete interactive key generation successfully
	mockIn.Reset("\n" + password + "\n" + password + "\n")
	require.NoError(t, cmd.ExecuteContext(ctx))

	// passwords don't match and fail interactive key generation
	mockIn.Reset("\n" + password + "\n" + "fail" + "\n")
	require.Error(t, cmd.ExecuteContext(ctx))
}

func Test_runAddCmdDryRun(t *testing.T) {
	pubkey1 := `{"@type":"/cosmos.crypto.secp256k1.PubKey","key":"AtObiFVE4s+9+RX5SP8TN9r2mxpoaT4eGj9CJfK7VRzN"}`
	pubkey2 := `{"@type":"/cosmos.crypto.secp256k1.PubKey","key":"A/se1vkqgdQ7VJQCM4mxN+L+ciGhnnJ4XYsQCRBMrdRi"}`
	cdc := simapp.MakeTestEncodingConfig().Codec

	testData := []struct {
		name  string
		args  []string
		added bool
	}{
		{
			name: "account is added",
			args: []string{
				"testkey",
				fmt.Sprintf("--%s=%s", flags.FlagDryRun, "false"),
			},
			added: true,
		},
		{
			name: "account is not added with dry run",
			args: []string{
				"testkey",
				fmt.Sprintf("--%s=%s", flags.FlagDryRun, "true"),
			},
			added: false,
		},
		{
			name: "multisig account is added",
			args: []string{
				"testkey",
				fmt.Sprintf("--%s=%s", flags.FlagDryRun, "false"),
				fmt.Sprintf("--%s=%s", flagMultisig, "subkey"),
			},
			added: true,
		},
		{
			name: "multisig account is not added with dry run",
			args: []string{
				"testkey",
				fmt.Sprintf("--%s=%s", flags.FlagDryRun, "true"),
				fmt.Sprintf("--%s=%s", flagMultisig, "subkey"),
			},
			added: false,
		},
		{
			name: "pubkey account is added",
			args: []string{
				"testkey",
				fmt.Sprintf("--%s=%s", flags.FlagDryRun, "false"),
				fmt.Sprintf("--%s=%s", FlagPublicKey, pubkey1),
			},
			added: true,
		},
		{
			name: "pubkey account is not added with dry run",
			args: []string{
				"testkey",
				fmt.Sprintf("--%s=%s", flags.FlagDryRun, "true"),
				fmt.Sprintf("--%s=%s", FlagPublicKey, pubkey2),
			},
			added: false,
		},
	}
	for _, tt := range testData {
		tt := tt
		t.Run(tt.name, func(t *testing.T) {
			cmd := AddKeyCommand()
			cmd.Flags().AddFlagSet(Commands("home").PersistentFlags())

			kbHome := t.TempDir()
			mockIn := testutil.ApplyMockIODiscardOutErr(cmd)

			kb, err := keyring.New(sdk.KeyringServiceName(), keyring.BackendTest, kbHome, mockIn, cdc)
			require.NoError(t, err)

			clientCtx := client.Context{}.
				WithCodec(cdc).
				WithKeyringDir(kbHome).
				WithKeyring(kb)
			ctx := context.WithValue(context.Background(), client.ClientContextKey, &clientCtx)

			path := sdk.GetConfig().GetFullBIP44Path()
			_, err = kb.NewAccount("subkey", testutil.TestMnemonic, "", path, hd.Secp256k1)
			require.NoError(t, err)

			t.Cleanup(func() {
				_ = kb.Delete("subkey")
			})

			b := bytes.NewBufferString("")
			cmd.SetOut(b)

			cmd.SetArgs(tt.args)
			require.NoError(t, cmd.ExecuteContext(ctx))

			if tt.added {
				_, err := kb.Key("testkey")
				require.NoError(t, err)

				out, err := ioutil.ReadAll(b)
				require.NoError(t, err)
				require.Contains(t, string(out), "name: testkey")
			} else {
				_, err = kb.Key("testkey")
				require.Error(t, err)
				require.Equal(t, "testkey: key not found", err.Error())
			}
		})
	}
}

func TestAddRecoverFileBackend(t *testing.T) {
	cmd := AddKeyCommand()
	cmd.Flags().AddFlagSet(Commands("home").PersistentFlags())
	cdc := simapp.MakeTestEncodingConfig().Codec

	mockIn := testutil.ApplyMockIODiscardOutErr(cmd)
	kbHome := t.TempDir()

	clientCtx := client.Context{}.WithKeyringDir(kbHome).WithInput(mockIn).WithCodec(cdc)
	ctx := context.WithValue(context.Background(), client.ClientContextKey, &clientCtx)

	cmd.SetArgs([]string{
		"keyname1",
		fmt.Sprintf("--%s=%s", flags.FlagHome, kbHome),
		fmt.Sprintf("--%s=%s", cli.OutputFlag, OutputFormatText),
		fmt.Sprintf("--%s=%s", flags.FlagKeyAlgorithm, string(hd.Secp256k1Type)),
		fmt.Sprintf("--%s=%s", flags.FlagKeyringBackend, keyring.BackendFile),
		fmt.Sprintf("--%s", flagRecover),
	})

	keyringPassword := "12345678"

	entropySeed, err := bip39.NewEntropy(mnemonicEntropySize)
	require.NoError(t, err)

	mnemonic, err := bip39.NewMnemonic(entropySeed)
	require.NoError(t, err)

	mockIn.Reset(fmt.Sprintf("%s\n%s\n%s\n", mnemonic, keyringPassword, keyringPassword))
	require.NoError(t, cmd.ExecuteContext(ctx))

	kb, err := keyring.New(sdk.KeyringServiceName(), keyring.BackendFile, kbHome, mockIn, cdc)
	require.NoError(t, err)

	t.Cleanup(func() {
		mockIn.Reset(fmt.Sprintf("%s\n%s\n", keyringPassword, keyringPassword))
		_ = kb.Delete("keyname1")
	})

	mockIn.Reset(fmt.Sprintf("%s\n%s\n", keyringPassword, keyringPassword))
	k, err := kb.Key("keyname1")
	require.NoError(t, err)
	require.Equal(t, "keyname1", k.Name)
}