package simulation_test

import (
	"encoding/binary"
	"fmt"
	"testing"
	"time"

	"cosmossdk.io/math"
	"github.com/stretchr/testify/require"

	"github.com/cosmos/cosmos-sdk/crypto/keys/ed25519"
	sdk "github.com/cosmos/cosmos-sdk/types"
	"github.com/cosmos/cosmos-sdk/types/kv"
	moduletestutil "github.com/cosmos/cosmos-sdk/types/module/testutil"
	"github.com/cosmos/cosmos-sdk/x/gov"
	"github.com/cosmos/cosmos-sdk/x/gov/simulation"
	"github.com/cosmos/cosmos-sdk/x/gov/types"
	v1 "github.com/cosmos/cosmos-sdk/x/gov/types/v1"
	"github.com/cosmos/cosmos-sdk/x/gov/types/v1beta1"
)

var (
	delPk1   = ed25519.GenPrivKey().PubKey()
	delAddr1 = sdk.AccAddress(delPk1.Address())
)

func TestDecodeStore(t *testing.T) {
	cdc := moduletestutil.MakeTestEncodingConfig(gov.AppModuleBasic{}).Codec
	dec := simulation.NewDecodeStore(cdc)

	endTime := time.Now().UTC()
	content, ok := v1beta1.ContentFromProposalType("test", "test", v1beta1.ProposalTypeText)
	require.True(t, ok)
	proposalA, err := v1beta1.NewProposal(content, 1, endTime, endTime.Add(24*time.Hour))
	require.NoError(t, err)
	proposalB, err := v1beta1.NewProposal(content, 2, endTime, endTime.Add(24*time.Hour))
	require.NoError(t, err)
	proposalC, err := v1.NewProposal([]sdk.Msg{}, 3, endTime, endTime.Add(24*time.Hour), "metadata", "title", "summary", delAddr1, false)
	require.NoError(t, err)
	proposalD, err := v1.NewProposal([]sdk.Msg{}, 4, endTime, endTime.Add(24*time.Hour), "metadata", "title", "summary", delAddr1, true)
	require.NoError(t, err)

	proposalIDBz := make([]byte, 8)
	binary.LittleEndian.PutUint64(proposalIDBz, 1)
	deposit := v1beta1.NewDeposit(1, delAddr1, sdk.NewCoins(sdk.NewCoin(sdk.DefaultBondDenom, math.OneInt())))
	vote := v1beta1.NewVote(1, delAddr1, v1beta1.NewNonSplitVoteOption(v1beta1.OptionYes))

	tests := []struct {
		name        string
		kvA, kvB    kv.Pair
		expectedLog string
		wantPanic   bool
	}{
		{
			"proposals v1beta",
			kv.Pair{Key: types.ProposalKey(1), Value: cdc.MustMarshal(&proposalA)},
			kv.Pair{Key: types.ProposalKey(2), Value: cdc.MustMarshal(&proposalB)},
			fmt.Sprintf("%v\n%v", proposalA, proposalB), false,
		},
		{
			"proposals v1",
			kv.Pair{Key: types.ProposalKey(3), Value: cdc.MustMarshal(&proposalC)},
			kv.Pair{Key: types.ProposalKey(4), Value: cdc.MustMarshal(&proposalD)},
			fmt.Sprintf("%v\n%v", proposalC, proposalD), false,
		},
		{
			"proposal IDs",
			kv.Pair{Key: types.InactiveProposalQueueKey(1, endTime), Value: proposalIDBz},
			kv.Pair{Key: types.InactiveProposalQueueKey(1, endTime), Value: proposalIDBz},
			"proposalIDA: 1\nProposalIDB: 1", false,
		},
		{
			"deposits",
			kv.Pair{Key: types.DepositKey(1, delAddr1), Value: cdc.MustMarshal(&deposit)},
			kv.Pair{Key: types.DepositKey(1, delAddr1), Value: cdc.MustMarshal(&deposit)},
			fmt.Sprintf("%v\n%v", deposit, deposit), false,
		},
		{
			"votes",
			kv.Pair{Key: types.VoteKey(1, delAddr1), Value: cdc.MustMarshal(&vote)},
			kv.Pair{Key: types.VoteKey(1, delAddr1), Value: cdc.MustMarshal(&vote)},
			fmt.Sprintf("%v\n%v", vote, vote), false,
		},
		{
			"other",
			kv.Pair{Key: []byte{0x99}, Value: []byte{0x99}},
			kv.Pair{Key: []byte{0x99}, Value: []byte{0x99}},
			"", true,
		},
	}

	for _, tt := range tests {
		tt := tt
		t.Run(tt.name, func(t *testing.T) {
			if tt.wantPanic {
				require.Panics(t, func() { dec(tt.kvA, tt.kvB) }, tt.name)
			} else {
				require.Equal(t, tt.expectedLog, dec(tt.kvA, tt.kvB), tt.name)
			}
		})
	}
}