import * as admin from 'firebase-admin'
import { Group } from 'common/group'
import { initAdmin } from 'functions/src/scripts/script-init'
import { log } from '../utils'

const getGroups = async () => {
  const firestore = admin.firestore()
  const groups = await firestore.collection('groups').get()
  return groups.docs.map((doc) => doc.data() as Group)
}

const createContractIdForGroup = async (
  groupId: string,
  contractId: string
) => {
  const firestore = admin.firestore()
  const now = Date.now()
  const contractDoc = await firestore
    .collection('groups')
    .doc(groupId)
    .collection('groupContracts')
    .doc(contractId)
    .get()
  if (!contractDoc.exists)
    await firestore
      .collection('groups')
      .doc(groupId)
      .collection('groupContracts')
      .doc(contractId)
      .create({
        contractId,
        createdTime: now,
      })
}

const createMemberForGroup = async (groupId: string, userId: string) => {
  const firestore = admin.firestore()
  const now = Date.now()
  const memberDoc = await firestore
    .collection('groups')
    .doc(groupId)
    .collection('groupMembers')
    .doc(userId)
    .get()
  if (!memberDoc.exists)
    await firestore
      .collection('groups')
      .doc(groupId)
      .collection('groupMembers')
      .doc(userId)
      .create({
        userId,
        createdTime: now,
      })
}

// eslint-disable-next-line @typescript-eslint/no-unused-vars
async function convertGroupFieldsToGroupDocuments() {
  const groups = await getGroups()
  for (const group of groups) {
    log('updating group', group.slug)
    const groupRef = admin.firestore().collection('groups').doc(group.id)
    const totalMembers = (await groupRef.collection('groupMembers').get()).size
    const totalContracts = (await groupRef.collection('groupContracts').get())
      .size
    if (
      totalMembers === group.memberIds?.length &&
      totalContracts === group.contractIds?.length
    ) {
      log('group already converted', group.slug)
      continue
    }
    const contractStart = totalContracts - 1 < 0 ? 0 : totalContracts - 1
    const membersStart = totalMembers - 1 < 0 ? 0 : totalMembers - 1
    for (const contractId of group.contractIds?.slice(
      contractStart,
      group.contractIds?.length
    ) ?? []) {
      await createContractIdForGroup(group.id, contractId)
    }
    for (const userId of group.memberIds?.slice(
      membersStart,
      group.memberIds?.length
    ) ?? []) {
      await createMemberForGroup(group.id, userId)
    }
  }
}

async function updateTotalContractsAndMembers() {
  const groups = await getGroups()
  for (const group of groups) {
    log('updating group total contracts and members', group.slug)
    const groupRef = admin.firestore().collection('groups').doc(group.id)
    const totalMembers = (await groupRef.collection('groupMembers').get()).size
    const totalContracts = (await groupRef.collection('groupContracts').get())
      .size
    await groupRef.update({
      totalMembers,
      totalContracts,
    })
  }
}

if (require.main === module) {
  initAdmin()
  // convertGroupFieldsToGroupDocuments()
  updateTotalContractsAndMembers()
}