package incentive

import (
	"fmt"

	sdk "github.com/cosmos/cosmos-sdk/types"

	"github.com/kava-labs/kava/x/incentive/keeper"
	"github.com/kava-labs/kava/x/incentive/types"
)

// InitGenesis initializes the store state from a genesis state.
func InitGenesis(ctx sdk.Context, k keeper.Keeper, supplyKeeper types.SupplyKeeper, cdpKeeper types.CdpKeeper, gs types.GenesisState) {

	// check if the module account exists
	moduleAcc := supplyKeeper.GetModuleAccount(ctx, types.IncentiveMacc)
	if moduleAcc == nil {
		panic(fmt.Sprintf("%s module account has not been set", types.IncentiveMacc))
	}

	if err := gs.Validate(); err != nil {
		panic(fmt.Sprintf("failed to validate %s genesis state: %s", types.ModuleName, err))
	}

	for _, rp := range gs.Params.USDXMintingRewardPeriods {
		_, found := cdpKeeper.GetCollateral(ctx, rp.CollateralType)
		if !found {
			panic(fmt.Sprintf("usdx minting collateral type %s not found in cdp collateral types", rp.CollateralType))
		}
		k.SetUSDXMintingRewardFactor(ctx, rp.CollateralType, sdk.ZeroDec())
	}

	for _, mrp := range gs.Params.HardSupplyRewardPeriods {
		newRewardIndexes := types.RewardIndexes{}
		for _, rc := range mrp.RewardsPerSecond {
			ri := types.NewRewardIndex(rc.Denom, sdk.ZeroDec())
			newRewardIndexes = append(newRewardIndexes, ri)
		}
		k.SetHardSupplyRewardIndexes(ctx, mrp.CollateralType, newRewardIndexes)
	}

	for _, mrp := range gs.Params.HardBorrowRewardPeriods {
		newRewardIndexes := types.RewardIndexes{}
		for _, rc := range mrp.RewardsPerSecond {
			ri := types.NewRewardIndex(rc.Denom, sdk.ZeroDec())
			newRewardIndexes = append(newRewardIndexes, ri)
		}
		k.SetHardBorrowRewardIndexes(ctx, mrp.CollateralType, newRewardIndexes)
	}

	for _, rp := range gs.Params.HardDelegatorRewardPeriods {
		k.SetHardDelegatorRewardFactor(ctx, rp.CollateralType, sdk.ZeroDec())
	}

	k.SetParams(ctx, gs.Params)

	for _, gat := range gs.USDXAccumulationTimes {
		k.SetPreviousUSDXMintingAccrualTime(ctx, gat.CollateralType, gat.PreviousAccumulationTime)
		k.SetUSDXMintingRewardFactor(ctx, gat.CollateralType, gat.RewardFactor)
	}

	for _, gat := range gs.HardSupplyAccumulationTimes {
		k.SetPreviousHardSupplyRewardAccrualTime(ctx, gat.CollateralType, gat.PreviousAccumulationTime)
	}

	for _, gat := range gs.HardBorrowAccumulationTimes {
		k.SetPreviousHardBorrowRewardAccrualTime(ctx, gat.CollateralType, gat.PreviousAccumulationTime)
	}

	for _, gat := range gs.HardDelegatorAccumulationTimes {
		k.SetPreviousHardDelegatorRewardAccrualTime(ctx, gat.CollateralType, gat.PreviousAccumulationTime)
	}

	for _, claim := range gs.USDXMintingClaims {
		for _, ri := range claim.RewardIndexes {
			if ri.RewardFactor != sdk.ZeroDec() {
				ri.RewardFactor = sdk.ZeroDec()
			}
		}
		k.SetUSDXMintingClaim(ctx, claim)
	}

	for _, claim := range gs.HardLiquidityProviderClaims {
		for _, mri := range claim.SupplyRewardIndexes {
			for _, ri := range mri.RewardIndexes {
				if ri.RewardFactor != sdk.ZeroDec() {
					ri.RewardFactor = sdk.ZeroDec()
				}
			}
		}
		for _, mri := range claim.BorrowRewardIndexes {
			for _, ri := range mri.RewardIndexes {
				if ri.RewardFactor != sdk.ZeroDec() {
					ri.RewardFactor = sdk.ZeroDec()
				}
			}
		}
		for _, ri := range claim.DelegatorRewardIndexes {
			if ri.RewardFactor != sdk.ZeroDec() {
				ri.RewardFactor = sdk.ZeroDec()
			}
		}
		k.SetHardLiquidityProviderClaim(ctx, claim)
	}
}

// ExportGenesis export genesis state for incentive module
func ExportGenesis(ctx sdk.Context, k keeper.Keeper) types.GenesisState {
	params := k.GetParams(ctx)

	usdxClaims := k.GetAllUSDXMintingClaims(ctx)
	hardClaims := k.GetAllHardLiquidityProviderClaims(ctx)

	synchronizedUsdxClaims := types.USDXMintingClaims{}
	synchronizedHardClaims := types.HardLiquidityProviderClaims{}

	for _, usdxClaim := range usdxClaims {
		claim, err := k.SynchronizeUSDXMintingClaim(ctx, usdxClaim)
		if err != nil {
			panic(err)
		}
		for _, ri := range claim.RewardIndexes {
			ri.RewardFactor = sdk.ZeroDec()
		}
		synchronizedUsdxClaims = append(synchronizedUsdxClaims, claim)
	}

	for _, hardClaim := range hardClaims {
		k.SynchronizeHardLiquidityProviderClaim(ctx, hardClaim.Owner)
		claim, found := k.GetHardLiquidityProviderClaim(ctx, hardClaim.Owner)
		if !found {
			panic("hard liquidity provider claim should always be found after synchronization")
		}
		for _, bri := range claim.BorrowRewardIndexes {
			for _, ri := range bri.RewardIndexes {
				ri.RewardFactor = sdk.ZeroDec()
			}
		}
		for _, sri := range claim.SupplyRewardIndexes {
			for _, ri := range sri.RewardIndexes {
				ri.RewardFactor = sdk.ZeroDec()
			}
		}
		for _, dri := range claim.DelegatorRewardIndexes {
			dri.RewardFactor = sdk.ZeroDec()
		}
		synchronizedHardClaims = append(synchronizedHardClaims, claim)
	}

	var gats GenesisAccumulationTimes

	for _, rp := range params.USDXMintingRewardPeriods {
		pat, found := k.GetPreviousUSDXMintingAccrualTime(ctx, rp.CollateralType)
		if !found {
			pat = ctx.BlockTime()
		}
		factor, found := k.GetUSDXMintingRewardFactor(ctx, rp.CollateralType)
		if !found {
			factor = sdk.ZeroDec()
		}
		gat := types.NewGenesisAccumulationTime(rp.CollateralType, pat, factor)
		gats = append(gats, gat)
	}

	return types.NewGenesisState(params, gats, DefaultGenesisAccumulationTimes, DefaultGenesisAccumulationTimes, DefaultGenesisAccumulationTimes, synchronizedUsdxClaims, synchronizedHardClaims)
}