package supply

import (
	sdk "github.com/cosmos/cosmos-sdk/types"
	"github.com/cosmos/cosmos-sdk/x/supply/types"
)

// InitGenesis sets supply information for genesis.
//
// CONTRACT: all types of accounts must have been already initialized/created
func InitGenesis(ctx sdk.Context, keeper Keeper, bk types.BankKeeper, data GenesisState) {
	// manually set the total supply based on accounts if not provided
	if data.Supply.Empty() {
		var totalSupply sdk.Coins
		bk.IterateAllBalances(ctx,
			func(_ sdk.AccAddress, balance sdk.Coin) (stop bool) {
				totalSupply = totalSupply.Add(balance)
				return false
			},
		)

		data.Supply = totalSupply
	}

	keeper.SetSupply(ctx, types.NewSupply(data.Supply))
}

// ExportGenesis returns a GenesisState for a given context and keeper.
func ExportGenesis(ctx sdk.Context, keeper Keeper) GenesisState {
	return NewGenesisState(keeper.GetSupply(ctx).GetTotal())
}

// ValidateGenesis performs basic validation of supply genesis data returning an
// error for any failed validation criteria.
func ValidateGenesis(data GenesisState) error {
	return types.NewSupply(data.Supply).ValidateBasic()
}