package ibctesting

import (
	"encoding/json"
	"testing"
	"time"

	dbm "github.com/cosmos/cosmos-db"
	"github.com/stretchr/testify/require"

	"cosmossdk.io/log"
	sdkmath "cosmossdk.io/math"
	storetypes "cosmossdk.io/store/types"

	"git.cw.tr/mukan-network/mukan-sdk/baseapp"
	"git.cw.tr/mukan-network/mukan-sdk/client"
	"git.cw.tr/mukan-network/mukan-sdk/codec"
	codectypes "git.cw.tr/mukan-network/mukan-sdk/codec/types"
	cryptocodec "git.cw.tr/mukan-network/mukan-sdk/crypto/codec"
	servertypes "git.cw.tr/mukan-network/mukan-sdk/server/types"
	simtestutil "git.cw.tr/mukan-network/mukan-sdk/testutil/sims"
	sdk "git.cw.tr/mukan-network/mukan-sdk/types"
	authtypes "git.cw.tr/mukan-network/mukan-sdk/x/auth/types"
	banktypes "git.cw.tr/mukan-network/mukan-sdk/x/bank/types"
	stakingtypes "git.cw.tr/mukan-network/mukan-sdk/x/staking/types"

	abci "git.cw.tr/mukan-network/mukan-consensus/abci/types"
	cmttypes "git.cw.tr/mukan-network/mukan-consensus/types"

	"git.cw.tr/mukan-network/mukan-ibc/modules/core/keeper"
	"git.cw.tr/mukan-network/mukan-ibc/testing/simapp"
)

var DefaultTestingAppInit AppCreator = SetupTestingApp

type TestingApp interface {
	servertypes.ABCI

	// ibc-go additions
	GetBaseApp() *baseapp.BaseApp
	GetIBCKeeper() *keeper.Keeper
	GetTxConfig() client.TxConfig

	// Implemented by SimApp
	AppCodec() codec.Codec

	// Implemented by BaseApp
	LastCommitID() storetypes.CommitID
	LastBlockHeight() int64
}

func SetupTestingApp() (TestingApp, map[string]json.RawMessage) {
	db := dbm.NewMemDB()
	app := simapp.NewSimApp(log.NewNopLogger(), db, nil, true, simtestutil.EmptyAppOptions{})
	return app, app.DefaultGenesis()
}

// SetupWithGenesisValSet initializes a new SimApp with a validator set and genesis accounts
// that also act as delegators. For simplicity, each validator is bonded with a delegation
// of one consensus engine unit (10^6) in the default token of the simapp from first genesis
// account. A Nop logger is set in SimApp.
func SetupWithGenesisValSet(tb testing.TB, valSet *cmttypes.ValidatorSet, genAccs []authtypes.GenesisAccount, chainID string, powerReduction sdkmath.Int, balances ...banktypes.Balance) TestingApp {
	tb.Helper()
	return setupWithGenesisValSet(tb, valSet, genAccs, chainID, powerReduction, DefaultTestingAppInit, balances...)
}

func setupWithGenesisValSet(tb testing.TB, valSet *cmttypes.ValidatorSet, genAccs []authtypes.GenesisAccount, chainID string, powerReduction sdkmath.Int, appCreator AppCreator, balances ...banktypes.Balance) TestingApp {
	tb.Helper()
	app, genesisState := appCreator()

	// ensure baseapp has a chain-id set before running InitChain
	baseapp.SetChainID(chainID)(app.GetBaseApp())

	// set genesis accounts
	authGenesis := authtypes.NewGenesisState(authtypes.DefaultParams(), genAccs)
	genesisState[authtypes.ModuleName] = app.AppCodec().MustMarshalJSON(authGenesis)

	validators := make([]stakingtypes.Validator, 0, len(valSet.Validators))
	delegations := make([]stakingtypes.Delegation, 0, len(valSet.Validators))

	bondAmt := sdk.TokensFromConsensusPower(1, powerReduction)

	for _, val := range valSet.Validators {
		pk, err := cryptocodec.FromCmtPubKeyInterface(val.PubKey)
		require.NoError(tb, err)
		pkAny, err := codectypes.NewAnyWithValue(pk)
		require.NoError(tb, err)
		validator := stakingtypes.Validator{
			OperatorAddress:   sdk.ValAddress(val.Address).String(),
			ConsensusPubkey:   pkAny,
			Jailed:            false,
			Status:            stakingtypes.Bonded,
			Tokens:            bondAmt,
			DelegatorShares:   sdkmath.LegacyOneDec(),
			Description:       stakingtypes.Description{},
			UnbondingHeight:   int64(0),
			UnbondingTime:     time.Unix(0, 0).UTC(),
			Commission:        stakingtypes.NewCommission(sdkmath.LegacyZeroDec(), sdkmath.LegacyZeroDec(), sdkmath.LegacyZeroDec()),
			MinSelfDelegation: sdkmath.ZeroInt(),
		}

		validators = append(validators, validator)
		delegations = append(delegations, stakingtypes.NewDelegation(genAccs[0].GetAddress().String(), sdk.ValAddress(val.Address).String(), sdkmath.LegacyOneDec()))
	}

	// set validators and delegations
	var stakingGenesis stakingtypes.GenesisState
	app.AppCodec().MustUnmarshalJSON(genesisState[stakingtypes.ModuleName], &stakingGenesis)

	bondDenom := stakingGenesis.Params.BondDenom

	// add bonded amount to bonded pool module account
	balances = append(balances, banktypes.Balance{
		Address: authtypes.NewModuleAddress(stakingtypes.BondedPoolName).String(),
		Coins:   sdk.Coins{sdk.NewCoin(bondDenom, bondAmt.Mul(sdkmath.NewInt(int64(len(valSet.Validators)))))},
	})

	// set validators and delegations
	stakingGenesis = *stakingtypes.NewGenesisState(stakingGenesis.Params, validators, delegations)
	genesisState[stakingtypes.ModuleName] = app.AppCodec().MustMarshalJSON(&stakingGenesis)

	// update total supply
	bankGenesis := banktypes.NewGenesisState(banktypes.DefaultGenesisState().Params, balances, sdk.NewCoins(), []banktypes.Metadata{}, []banktypes.SendEnabled{})
	genesisState[banktypes.ModuleName] = app.AppCodec().MustMarshalJSON(bankGenesis)

	stateBytes, err := json.MarshalIndent(genesisState, "", " ")
	require.NoError(tb, err)

	// init chain will set the validator set and initialize the genesis accounts
	_, err = app.InitChain(
		&abci.RequestInitChain{
			ChainId:         chainID,
			Validators:      []abci.ValidatorUpdate{},
			AppStateBytes:   stateBytes,
			ConsensusParams: simtestutil.DefaultConsensusParams,
		},
	)
	require.NoError(tb, err)

	return app
}