package admin

import (
	"chain"
	"chain/runtime"
)

const (
	SetFeeCollectorEvent = "SetFeeCollector"
)

var (
	feeCollectorAddr address
)

func init() {
	caller := runtime.OriginCaller()
	feeCollectorAddr = caller
}

func GetFeeCollector() address {
	return feeCollectorAddr
}

func SetFeeCollector(cur realm, addr address) {
	caller := runtime.OriginCaller()

	if caller != admin {
		panic("admin access required to set fee collector")
	}

	if !addr.IsValid() {
		panic("invalid address")
	}

	oldAddr := feeCollectorAddr
	feeCollectorAddr = addr

	chain.Emit(
		SetFeeCollectorEvent,
		"admin", caller.String(),
		"oldAddr", oldAddr.String(),
		"newAddr", addr.String(),
	)
}

func IsFeeCollector(address address) bool {
	return address == feeCollectorAddr
}