package admin

import (
	"chain"
	"chain/runtime"
)

const (
	TransferAdminEvent  = "TransferAdmin"
	SetExplorerURLEvent = "SetExplorerURL"
)

var (
	admin       address
	explorerURL string = "https://app.alpha.akkadia.land"
)

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

func GetAdmin() address {
	return admin
}

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

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

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

	prevAdmin := admin

	chain.Emit(
		TransferAdminEvent,
		"from", prevAdmin.String(),
		"to", address.String(),
	)

	admin = address
}

func IsAdmin(address address) bool {
	return address == admin
}

// SetExplorerURL sets the explorer base URL (admin only)
func SetExplorerURL(cur realm, url string) {
	caller := runtime.OriginCaller()
	if caller != admin {
		panic("admin access required to set explorer URL")
	}

	oldURL := explorerURL
	explorerURL = url

	chain.Emit(
		SetExplorerURLEvent,
		"admin", caller.String(),
		"oldURL", oldURL,
		"newURL", url,
	)
}

// GetExplorerURL returns the explorer base URL
func GetExplorerURL() string {
	return explorerURL
}