'use client'

import { Book, Genre, HoldRequest, Repository } from '@/payload-types'

import { Combobox, ComboboxLabel, ComboboxOption, ComboboxDescription } from '@/components/combobox'
import { Field, Label } from '@/components/fieldset'
import type { PaginatedDocs } from 'payload'
import { Button } from '@/components/ui/button'
import { Badge } from '@/components/ui/badge'

import { Loader2 } from 'lucide-react'
import { RichText } from '@/components/RichText'
import { useMemo, useState } from 'react'
import requestHold from '../../serverCalls/requestHold'
import { useGlobal } from '@/providers/GlobalProvider'
import Link from 'next/link'

type DropDownProps = {
  currentRepository: Repository
  repositories: Repository[]
  isDisabled: boolean
  doesHoldExist: boolean
  isRequesting: boolean
  onClickRequest: () => void
  onChange: (repo: Repository | null) => void
}
function RepoDropdown({
  currentRepository,
  repositories,
  isRequesting,
  doesHoldExist,
  isDisabled,
  onClickRequest,
  onChange,
}: DropDownProps) {
  return (
    <Field className="">
      {doesHoldExist ? (
        <span className="font-medium text-emerald-800 dark:text-emerald-300 ">
          You have requested a hold for this book
        </span>
      ) : (
        <>
          <Label htmlFor="repositories">From Repository</Label>
          <div className="flex gap-2">
            <Combobox
              name="repositories"
              options={repositories}
              disabled={isDisabled || doesHoldExist}
              displayValue={(repo) => repo?.name}
              defaultValue={currentRepository}
              className=""
              onChange={(repo) => onChange(repo)}
            >
              {(repo) => (
                <ComboboxOption value={repo}>
                  <ComboboxLabel>{repo.abbreviation}</ComboboxLabel>
                  <ComboboxDescription>{repo.name}</ComboboxDescription>
                </ComboboxOption>
              )}
            </Combobox>
            <Button
              disabled={isDisabled}
              onClick={onClickRequest}
              className="hover:scale-105 bg-emerald-500 text-foreground hover:text-background cursor-pointer disabled:bg-muted-foreground/80"
            >
              {isRequesting && <Loader2 className="animate-spin" />}
              <span>Request Hold</span>
            </Button>
          </div>
        </>
      )}
    </Field>
  )
}

type Props = {
  book: Book
  repositories: PaginatedDocs<Repository>
  existingHolds: PaginatedDocs<HoldRequest> | null
}

export default function BookByIdPageClient(props: Props) {
  const { book, repositories, existingHolds } = props
  const repos = repositories.docs

  const { user } = useGlobal()

  console.log(user)

  const [isRequestingCopy, setIsRequestingCopy] = useState(false)
  const [selectedRepository, setSelectedRepository] = useState<Repository | null>(
    repos.length ? repos[0] : null,
  )

  const [doesHoldExist, setDoesHoldExist] = useState(!!existingHolds?.totalDocs)

  const isRequestDisabled = useMemo(() => {
    return isRequestingCopy
  }, [isRequestingCopy])

  const onClickRequest = async () => {
    if (isRequestingCopy || !selectedRepository || !book || doesHoldExist) return

    setIsRequestingCopy(true)
    const newHoldResponse = await requestHold({
      repositoryId: selectedRepository.id,
      bookId: book.id,
    })

    if (newHoldResponse?.id) setDoesHoldExist(true)
    setIsRequestingCopy(false)
  }

  return (
    <div className="mx-auto px-4 py-16">
      <div className="md:grid md:grid-cols-7 md:gap-8">
        {/* Book Cover */}
        <div className="md:col-span-3">
          <img
            alt="book cover art"
            src={
              book.isbn
                ? `https://covers.openlibrary.org/b/isbn/${book.isbn}-L.jpg`
                : '/images/book-48.svg'
            }
            className="w-full rounded-lg bg-gray-100 object-cover"
          />
        </div>

        {/* Book details */}
        <div className="mt-14 sm:mt-16 md:col-span-4 md:mt-0">
          <div className="mt-4">
            <h1 className="text-2xl font-bold tracking-tight text-foreground sm:text-3xl">
              {book.title}
            </h1>

            <h2 id="information-heading" className="sr-only">
              Book information
            </h2>
            <p className="mt-2 text-sm text-muted-foreground">
              {book.publication && (
                <span>
                  Published:&nbsp;
                  <time dateTime={book.publication}>{book.publication}</time>
                </span>
              )}
            </p>
          </div>

          <p className="my-6 text-accent-foreground">{book.summary}</p>

          {!user ? (
            <Link
              href={`/login?redirectUrl=/books/${book.id}`}
              className="underline dark:text-amber-200 text-amber-700 text-lg font-medium"
            >
              Sign in to request a hold
            </Link>
          ) : (
            <RepoDropdown
              currentRepository={repos[0]}
              repositories={repos}
              isRequesting={isRequestingCopy}
              doesHoldExist={doesHoldExist}
              isDisabled={isRequestDisabled || !user}
              onClickRequest={onClickRequest}
              onChange={(repo) => setSelectedRepository(repo)}
            />
          )}

          <div className="mt-10 border-t border-gray-200 pt-10 ">
            <h3 className="text-sm font-medium text-foreground">Genres</h3>
            <div className="mt-4">
              <ul role="list" className="text-foreground flex gap-2 flex-wrap">
                {(book.genre as Genre[])?.map((g) => (
                  <Badge key={g.id} className="inline-block cursor-pointer">
                    {g.name}
                  </Badge>
                ))}
              </ul>
            </div>
          </div>

          {book.description && (
            <div className="mt-10 border-t border-gray-200 pt-10">
              <h3 className="text-sm font-medium text-muted-foreground">Description</h3>
              <RichText data={book.description} />
            </div>
          )}
        </div>
      </div>
    </div>
  )
}