package admin

import (
	"chain"
	"chain/runtime"
)

const (
	SetOperatorEvent   = "SetOperator"
	UnsetOperatorEvent = "UnsetOperator"
)

var (
	operatorAddrs map[address]bool = make(map[address]bool)
)

func init() {
	caller := runtime.OriginCaller()
	operatorAddrs[caller] = true
}

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

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

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

	operatorAddrs[addr] = true

	chain.Emit(
		SetOperatorEvent,
		"admin", caller.String(),
		"address", addr.String(),
	)
}

func GetOperators() []address {
	result := []address{}
	for addr, active := range operatorAddrs {
		if active {
			result = append(result, addr)
		}
	}
	return result
}

func UnsetOperator(cur realm, addr address) {
	caller := runtime.OriginCaller()
	if caller != admin {
		panic("admin access required to unset operator")
	}
	if !addr.IsValid() {
		panic("invalid address")
	}
	if !operatorAddrs[addr] {
		panic("address is not an operator")
	}
	delete(operatorAddrs, addr)
	chain.Emit(
		UnsetOperatorEvent,
		"admin", caller.String(),
		"address", addr.String(),
	)
}

func IsOperator(addr address) bool {
	return operatorAddrs[addr]
}