package keeper

import (
	"time"

	"github.com/tendermint/tendermint/crypto"

	sdk "github.com/cosmos/cosmos-sdk/types"
	"github.com/cosmos/cosmos-sdk/x/slashing/types"
)

var _ types.StakingHooks = Hooks{}

// Hooks wrapper struct for slashing keeper
type Hooks struct {
	k Keeper
}

// Return the slashing hooks
func (k Keeper) Hooks() Hooks {
	return Hooks{k}
}

// AfterValidatorBonded updates the signing info start height or create a new signing info
func (h Hooks) AfterValidatorBonded(ctx sdk.Context, consAddr sdk.ConsAddress, valAddr sdk.ValAddress) error {
	signingInfo, found := h.k.GetValidatorSigningInfo(ctx, consAddr)
	if found {
		signingInfo.StartHeight = ctx.BlockHeight()
	} else {
		signingInfo = types.NewValidatorSigningInfo(
			consAddr,
			ctx.BlockHeight(),
			0,
			time.Unix(0, 0),
			false,
			0,
		)
	}

	h.k.SetValidatorSigningInfo(ctx, consAddr, signingInfo)

	return nil
}

// AfterValidatorRemoved deletes the address-pubkey relation when a validator is removed,
func (h Hooks) AfterValidatorRemoved(ctx sdk.Context, consAddr sdk.ConsAddress, _ sdk.ValAddress) error {
	h.k.deleteAddrPubkeyRelation(ctx, crypto.Address(consAddr))
	return nil
}

// AfterValidatorCreated adds the address-pubkey relation when a validator is created.
func (h Hooks) AfterValidatorCreated(ctx sdk.Context, valAddr sdk.ValAddress) error {
	validator := h.k.sk.Validator(ctx, valAddr)
	consPk, err := validator.ConsPubKey()
	if err != nil {
		return err
	}

	return h.k.AddPubkey(ctx, consPk)
}

func (h Hooks) AfterValidatorBeginUnbonding(_ sdk.Context, _ sdk.ConsAddress, _ sdk.ValAddress) error {
	return nil
}

func (h Hooks) BeforeValidatorModified(_ sdk.Context, _ sdk.ValAddress) error {
	return nil
}

func (h Hooks) BeforeDelegationCreated(_ sdk.Context, _ sdk.AccAddress, _ sdk.ValAddress) error {
	return nil
}

func (h Hooks) BeforeDelegationSharesModified(_ sdk.Context, _ sdk.AccAddress, _ sdk.ValAddress) error {
	return nil
}

func (h Hooks) BeforeDelegationRemoved(_ sdk.Context, _ sdk.AccAddress, _ sdk.ValAddress) error {
	return nil
}

func (h Hooks) AfterDelegationModified(_ sdk.Context, _ sdk.AccAddress, _ sdk.ValAddress) error {
	return nil
}

func (h Hooks) BeforeValidatorSlashed(_ sdk.Context, _ sdk.ValAddress, _ sdk.Dec) error {
	return nil
}

func (h Hooks) AfterUnbondingInitiated(_ sdk.Context, _ uint64) error {
	return nil
}