package simapp

import (
	"github.com/cosmos/cosmos-sdk/baseapp"
	storetypes "github.com/cosmos/cosmos-sdk/store/types"
	sdk "github.com/cosmos/cosmos-sdk/types"
	"github.com/cosmos/cosmos-sdk/types/module"
	paramstypes "github.com/cosmos/cosmos-sdk/x/params/types"
	upgradetypes "github.com/cosmos/cosmos-sdk/x/upgrade/types"
)

// UpgradeName defines the on-chain upgrade name for the sample SimApp upgrade
// from v046 to v047.
//
// NOTE: This upgrade defines a reference implementation of what an upgrade
// could look like when an application is migrating from Cosmos SDK version
// v0.46.x to v0.47.x.
const UpgradeName = "v046-to-v047"

func (app SimApp) RegisterUpgradeHandlers() {
	baseAppLegacySS := app.ParamsKeeper.Subspace(baseapp.Paramspace).WithKeyTable(paramstypes.ConsensusParamsKeyTable())

	app.UpgradeKeeper.SetUpgradeHandler(
		UpgradeName,
		func(ctx sdk.Context, _ upgradetypes.Plan, fromVM module.VersionMap) (module.VersionMap, error) {
			// Migrate Tendermint consensus parameters from x/params module to a
			// dedicated x/consensus module.
			baseapp.MigrateParams(ctx, baseAppLegacySS, &app.ConsensusParamsKeeper)

			return app.ModuleManager.RunMigrations(ctx, app.Configurator(), fromVM)
		},
	)

	upgradeInfo, err := app.UpgradeKeeper.ReadUpgradeInfoFromDisk()
	if err != nil {
		panic(err)
	}

	if upgradeInfo.Name == UpgradeName && !app.UpgradeKeeper.IsSkipHeight(upgradeInfo.Height) {
		storeUpgrades := storetypes.StoreUpgrades{}

		// configure store loader that checks if version == upgradeHeight and applies store upgrades
		app.SetStoreLoader(upgradetypes.UpgradeStoreLoader(upgradeInfo.Height, &storeUpgrades))
	}
}