import React from 'react'
import { useRouter } from 'next/router'
import { useContract } from '../../hooks/use-contract'
import { Header } from '../../components/header'
import { ContractOverview } from '../../components/contract-overview'
import { BetPanel } from '../../components/bet-panel'
import { Col } from '../../components/layout/col'
import { useUser } from '../../hooks/use-user'
import { ResolutionPanel } from '../../components/resolution-panel'
import clsx from 'clsx'
import { ContractBetsTable, MyBetsSummary } from '../../components/bets-list'
import { useBets } from '../../hooks/use-bets'
import { Title } from '../../components/title'
import { Spacer } from '../../components/layout/spacer'
import { Contract } from '../../lib/firebase/contracts'
import { User } from '../../lib/firebase/users'

export default function ContractPage() {
  const user = useUser()

  const router = useRouter()
  const { contractId } = router.query as { contractId: string }

  const contract = useContract(contractId)

  if (contract === 'loading') {
    return <div />
  }

  if (!contract) {
    return <div>Contract not found...</div>
  }

  const { creatorId, isResolved } = contract
  const isCreator = user?.id === creatorId

  return (
    <Col className="max-w-7xl mx-auto sm:px-6 lg:px-8">
      <Header />

      <Col
        className={clsx(
          'w-full items-start md:flex-row mt-4',
          isResolved ? 'md:justify-center' : 'md:justify-between'
        )}
      >
        <div className="max-w-4xl w-full ">
          <ContractOverview contract={contract} className="p-4" />
          <BetsSection contract={contract} user={user ?? null} />
        </div>

        {!isResolved && (
          <>
            <div className="mt-12 md:mt-0 md:ml-8" />

            <Col className="w-full sm:w-auto">
              <BetPanel contract={contract} />

              {isCreator && (
                <ResolutionPanel creator={user} contract={contract} />
              )}
            </Col>
          </>
        )}
      </Col>
    </Col>
  )
}

function BetsSection(props: { contract: Contract; user: User | null }) {
  const { contract, user } = props
  const bets = useBets(contract.id)

  if (bets === 'loading' || bets.length === 0) return <></>

  // Decending creation time.
  bets.sort((bet1, bet2) => bet2.createdTime - bet1.createdTime)

  const userBets = user && bets.filter((bet) => bet.userId === user.id)

  return (
    <div className="p-4">
      {userBets && userBets.length > 0 && (
        <>
          <Title text="My bets" />
          <MyBetsSummary className="ml-1" contract={contract} bets={userBets} />
          <Spacer h={6} />
          <ContractBetsTable contract={contract} bets={userBets} />
          <Spacer h={6} />
        </>
      )}

      <Title text="All bets" />
      <ContractBetsTable contract={contract} bets={bets} />
    </div>
  )
}
