package keeper

import (
	"git.cw.tr/mukan-network/mukan-sdk/runtime"
	sdk "git.cw.tr/mukan-network/mukan-sdk/types"
	"git.cw.tr/mukan-network/mukan-sdk/x/slashing/exported"
	v2 "git.cw.tr/mukan-network/mukan-sdk/x/slashing/migrations/v2"
	v3 "git.cw.tr/mukan-network/mukan-sdk/x/slashing/migrations/v3"
	v4 "git.cw.tr/mukan-network/mukan-sdk/x/slashing/migrations/v4"
)

// Migrator is a struct for handling in-place store migrations.
type Migrator struct {
	keeper         Keeper
	legacySubspace exported.Subspace
}

// NewMigrator returns a new Migrator.
func NewMigrator(keeper Keeper, ss exported.Subspace) Migrator {
	return Migrator{keeper: keeper, legacySubspace: ss}
}

// Migrate1to2 migrates from version 1 to 2.
func (m Migrator) Migrate1to2(ctx sdk.Context) error {
	return v2.MigrateStore(ctx, m.keeper.storeService)
}

// Migrate2to3 migrates the x/slashing module state from the consensus
// version 2 to version 3. Specifically, it takes the parameters that are currently stored
// and managed by the x/params modules and stores them directly into the x/slashing
// module state.
func (m Migrator) Migrate2to3(ctx sdk.Context) error {
	store := runtime.KVStoreAdapter(m.keeper.storeService.OpenKVStore(ctx))
	return v3.Migrate(ctx, store, m.legacySubspace, m.keeper.cdc)
}

// Migrate3to4 migrates the x/slashing module state from the consensus
// version 3 to version 4. Specifically, it migrates the validator missed block
// bitmap.
func (m Migrator) Migrate3to4(ctx sdk.Context) error {
	store := runtime.KVStoreAdapter(m.keeper.storeService.OpenKVStore(ctx))
	params, err := m.keeper.GetParams(ctx)
	if err != nil {
		return err
	}
	return v4.Migrate(ctx, m.keeper.cdc, store, params)
}
