package keeper_test

import (
	"testing"

	"cosmossdk.io/math"
	stakingtypes "github.com/cosmos/cosmos-sdk/x/staking/types"
)

func (s *KeeperTestSuite) TestMsgUpdateParams() {
	ctx, keeper, msgServer := s.ctx, s.stakingKeeper, s.msgServer
	require := s.Require()

	testCases := []struct {
		name      string
		input     *stakingtypes.MsgUpdateParams
		expErr    bool
		expErrMsg string
	}{
		{
			name: "valid params",
			input: &stakingtypes.MsgUpdateParams{
				Authority: keeper.GetAuthority(),
				Params:    stakingtypes.DefaultParams(),
			},
			expErr: false,
		},
		{
			name: "invalid authority",
			input: &stakingtypes.MsgUpdateParams{
				Authority: "invalid",
				Params:    stakingtypes.DefaultParams(),
			},
			expErr:    true,
			expErrMsg: "invalid authority",
		},
		{
			name: "negative commission rate",
			input: &stakingtypes.MsgUpdateParams{
				Authority: keeper.GetAuthority(),
				Params: stakingtypes.Params{
					MinCommissionRate: math.LegacyNewDec(-10),
					UnbondingTime:     stakingtypes.DefaultUnbondingTime,
					MaxValidators:     stakingtypes.DefaultMaxValidators,
					MaxEntries:        stakingtypes.DefaultMaxEntries,
					HistoricalEntries: stakingtypes.DefaultHistoricalEntries,
					BondDenom:         stakingtypes.BondStatusBonded,
				},
			},
			expErr:    true,
			expErrMsg: "minimum commission rate cannot be negative",
		},
		{
			name: "commission rate cannot be bigger than 100",
			input: &stakingtypes.MsgUpdateParams{
				Authority: keeper.GetAuthority(),
				Params: stakingtypes.Params{
					MinCommissionRate: math.LegacyNewDec(2),
					UnbondingTime:     stakingtypes.DefaultUnbondingTime,
					MaxValidators:     stakingtypes.DefaultMaxValidators,
					MaxEntries:        stakingtypes.DefaultMaxEntries,
					HistoricalEntries: stakingtypes.DefaultHistoricalEntries,
					BondDenom:         stakingtypes.BondStatusBonded,
				},
			},
			expErr:    true,
			expErrMsg: "minimum commission rate cannot be greater than 100%",
		},
		{
			name: "invalid bond denom",
			input: &stakingtypes.MsgUpdateParams{
				Authority: keeper.GetAuthority(),
				Params: stakingtypes.Params{
					MinCommissionRate: stakingtypes.DefaultMinCommissionRate,
					UnbondingTime:     stakingtypes.DefaultUnbondingTime,
					MaxValidators:     stakingtypes.DefaultMaxValidators,
					MaxEntries:        stakingtypes.DefaultMaxEntries,
					HistoricalEntries: stakingtypes.DefaultHistoricalEntries,
					BondDenom:         "",
				},
			},
			expErr:    true,
			expErrMsg: "bond denom cannot be blank",
		},
		{
			name: "max validators most be positive",
			input: &stakingtypes.MsgUpdateParams{
				Authority: keeper.GetAuthority(),
				Params: stakingtypes.Params{
					MinCommissionRate: stakingtypes.DefaultMinCommissionRate,
					UnbondingTime:     stakingtypes.DefaultUnbondingTime,
					MaxValidators:     0,
					MaxEntries:        stakingtypes.DefaultMaxEntries,
					HistoricalEntries: stakingtypes.DefaultHistoricalEntries,
					BondDenom:         stakingtypes.BondStatusBonded,
				},
			},
			expErr:    true,
			expErrMsg: "max validators must be positive",
		},
		{
			name: "max entries most be positive",
			input: &stakingtypes.MsgUpdateParams{
				Authority: keeper.GetAuthority(),
				Params: stakingtypes.Params{
					MinCommissionRate: stakingtypes.DefaultMinCommissionRate,
					UnbondingTime:     stakingtypes.DefaultUnbondingTime,
					MaxValidators:     stakingtypes.DefaultMaxValidators,
					MaxEntries:        0,
					HistoricalEntries: stakingtypes.DefaultHistoricalEntries,
					BondDenom:         stakingtypes.BondStatusBonded,
				},
			},
			expErr:    true,
			expErrMsg: "max entries must be positive",
		},
	}

	for _, tc := range testCases {
		tc := tc
		s.T().Run(tc.name, func(t *testing.T) {
			_, err := msgServer.UpdateParams(ctx, tc.input)
			if tc.expErr {
				require.Error(err)
				require.Contains(err.Error(), tc.expErrMsg)
			} else {
				require.NoError(err)
			}
		})
	}
}