/**
 * Provides permission lookup for an address: 
 * not only the permission table, but also the administrator or Builder identity.
 */

import { TransactionBlock, Protocol, Bcs, IsValidAddress, Errors, ERROR, Permission, PermissionAnswer, BCS} from 'wowok';

export interface PermissionQuery {
    permission_object: string;
    address: string;
}

/*json: PermissionQuery; return PermissionAnswer */
export const query_permission_json = async (json:string) : Promise<string> => {
    try {
        const q : PermissionQuery = JSON.parse(json);
        return JSON.stringify({data:await query_permission(q)});
    } catch (e) {
        return JSON.stringify({error:e});
    }
}

export const query_permission = async (query:PermissionQuery) : Promise<PermissionAnswer> => {
    if (!IsValidAddress(query.permission_object)) {
        ERROR(Errors.IsValidAddress, 'permission.permission_object');
    }/*
    if (!IsValidAddress(query.address)) {
        ERROR(Errors.IsValidAddress, 'permission.address')
    }*/
    const txb = new TransactionBlock();
    const object = Permission.From(txb, query.permission_object);
    object.query_permissions_all(query.address);

    const res = await Protocol.Client().devInspectTransactionBlock({sender:query.address, transactionBlock:txb});
    if (res.results && res.results[0].returnValues && res.results[0].returnValues.length !== 2 )  {
        ERROR(Errors.Fail, 'permission.retValues')
    }

    const perm = Bcs.getInstance().de(BCS.U8, Uint8Array.from((res.results as any)[0].returnValues[0][0]));
    if (perm === Permission.PERMISSION_ADMIN || perm === Permission.PERMISSION_OWNER_AND_ADMIN) {
        return {who:query.address, admin:true, owner:perm%2===1, items:[], object:query.permission_object}
    } else {
        const perms = Bcs.getInstance().de_perms(Uint8Array.from((res.results as any)[0].returnValues[1][0]));
        return {who:query.address, admin:false, owner:perm%2===1, items:perms.map((v:any)=>{
            return {query:v?.index, permission:true, guard:v?.guard}
        }), object:query.permission_object};  
    }
}