import { Community, FederatedCommunity } from '../entity'
import { randomBytes } from 'node:crypto'
import { v4 as uuidv4 } from 'uuid'

/**
 * Creates a community.
 * @param foreign 
 * @param store if true, write to db, default: true
 * @returns 
 */
export async function createCommunity(foreign: boolean, store: boolean = true): Promise<Community> {
    const community = new Community()    
    community.publicKey = randomBytes(32)
    community.communityUuid = uuidv4()
    community.name = 'HomeCommunity-name'
    community.creationDate = new Date()

    if(foreign) {
        community.foreign = true
        community.name = 'ForeignCommunity-name'
        community.description = 'ForeignCommunity-description'
        community.url = `http://foreign-${Math.random()}/api`
        community.authenticatedAt = new Date()
    } else {
        community.foreign = false
        // todo: generate valid public/private key pair (ed25519)
        community.privateKey = randomBytes(64)
        community.name = 'HomeCommunity-name'
        community.description = 'HomeCommunity-description'
        community.url = 'http://localhost/api'
    }
    return store ? await community.save() : community
}

/**
 * Creates a verified federated community.
 * @param apiVersion 
 * @param verifiedBeforeMs time in ms before the current time
 * @param community 
 * @param store if true, write to db, default: true
 * @returns 
 */
export async function createVerifiedFederatedCommunity(
    apiVersion: string,
    verifiedBeforeMs: number,
    community: Community,
    store: boolean = true
): Promise<FederatedCommunity> {
    const federatedCommunity = new FederatedCommunity()
    federatedCommunity.apiVersion = apiVersion
    federatedCommunity.endPoint = community.url
    federatedCommunity.publicKey = community.publicKey
    federatedCommunity.community = community
    federatedCommunity.verifiedAt = new Date(Date.now() - verifiedBeforeMs)
    return store ? await federatedCommunity.save() : federatedCommunity
}