package keys

import (
	"bufio"
	"context"
	"fmt"
	"testing"

	"github.com/stretchr/testify/require"

	"github.com/cosmos/cosmos-sdk/client"
	"github.com/cosmos/cosmos-sdk/client/flags"
	codectestutil "github.com/cosmos/cosmos-sdk/codec/testutil"
	"github.com/cosmos/cosmos-sdk/crypto/hd"
	"github.com/cosmos/cosmos-sdk/crypto/keyring"
	"github.com/cosmos/cosmos-sdk/testutil"
	"github.com/cosmos/cosmos-sdk/testutil/testdata"
	sdk "github.com/cosmos/cosmos-sdk/types"
	moduletestutil "github.com/cosmos/cosmos-sdk/types/module/testutil"
)

func Test_runExportCmd(t *testing.T) {
	cdc := moduletestutil.MakeTestEncodingConfig(codectestutil.CodecOptions{}).Codec
	testCases := []struct {
		name                  string
		keyringBackend        string
		extraArgs             []string
		userInput             string
		mustFail              bool
		expectedOutput        string
		expectedOutputContain string // only valid when expectedOutput is empty
	}{
		{
			name:           "--unsafe only must fail",
			keyringBackend: keyring.BackendTest,
			extraArgs:      []string{"--unsafe"},
			mustFail:       true,
		},
		{
			name:           "--unarmored-hex must fail",
			keyringBackend: keyring.BackendTest,
			extraArgs:      []string{"--unarmored-hex"},
			mustFail:       true,
		},
		{
			name:           "--unsafe --unarmored-hex fail with no user confirmation",
			keyringBackend: keyring.BackendTest,
			extraArgs:      []string{"--unsafe", "--unarmored-hex"},
			userInput:      "",
			mustFail:       true,
			expectedOutput: "",
		},
		{
			name:                  "--unsafe --unarmored-hex --yes success",
			keyringBackend:        keyring.BackendTest,
			extraArgs:             []string{"--unsafe", "--unarmored-hex", "--yes"},
			userInput:             "",
			mustFail:              false,
			expectedOutputContain: "2485e33678db4175dc0ecef2d6e1fc493d4a0d7f7ce83324b6ed70afe77f3485\n",
		},
		{
			name:                  "--unsafe --unarmored-hex success",
			keyringBackend:        keyring.BackendTest,
			extraArgs:             []string{"--unsafe", "--unarmored-hex"},
			userInput:             "y\n",
			mustFail:              false,
			expectedOutputContain: "2485e33678db4175dc0ecef2d6e1fc493d4a0d7f7ce83324b6ed70afe77f3485\n",
		},
		{
			name:           "--unsafe --unarmored-hex --indiscreet success",
			keyringBackend: keyring.BackendTest,
			extraArgs:      []string{"--unsafe", "--unarmored-hex", "--indiscreet"},
			userInput:      "y\n",
			mustFail:       false,
			expectedOutput: "2485e33678db4175dc0ecef2d6e1fc493d4a0d7f7ce83324b6ed70afe77f3485\n",
		},
		{
			name:           "file keyring backend properly read password and user confirmation",
			keyringBackend: keyring.BackendFile,
			extraArgs:      []string{"--unsafe", "--unarmored-hex", "--indiscreet"},
			// first 2 pass for creating the key, then unsafe export confirmation, then unlock keyring pass
			userInput:      "12345678\n12345678\ny\n12345678\n",
			mustFail:       false,
			expectedOutput: "2485e33678db4175dc0ecef2d6e1fc493d4a0d7f7ce83324b6ed70afe77f3485\n",
		},
	}

	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			kbHome := t.TempDir()
			defaultArgs := []string{
				"keyname1",
				fmt.Sprintf("--%s=%s", flags.FlagKeyringDir, kbHome),
				fmt.Sprintf("--%s=%s", flags.FlagKeyringBackend, tc.keyringBackend),
			}

			cmd := ExportKeyCommand()
			cmd.Flags().AddFlagSet(Commands().PersistentFlags())

			cmd.SetArgs(append(defaultArgs, tc.extraArgs...))
			mockIn, mockOut := testutil.ApplyMockIO(cmd)

			mockIn.Reset(tc.userInput)
			mockInBuf := bufio.NewReader(mockIn)

			// create a key
			kb, err := keyring.New(sdk.KeyringServiceName(), tc.keyringBackend, kbHome, bufio.NewReader(mockInBuf), cdc)
			require.NoError(t, err)
			t.Cleanup(cleanupKeys(t, kb, "keyname1"))

			path := sdk.GetFullBIP44Path()
			_, err = kb.NewAccount("keyname1", testdata.TestMnemonic, "", path, hd.Secp256k1)
			require.NoError(t, err)

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

			err = cmd.ExecuteContext(ctx)
			if tc.mustFail {
				require.Error(t, err)
			} else {
				require.NoError(t, err)
				if tc.expectedOutput != "" {
					require.Equal(t, tc.expectedOutput, mockOut.String())
				} else if tc.expectedOutputContain != "" {
					require.Contains(t, mockOut.String(), tc.expectedOutputContain)
				}
			}
		})
	}
}