import type { Route } from './+types/route'

import type { MouseEvent } from 'react'
import { useRequest, useToggle } from 'ahooks'
import {
  BanIcon,
  CalendarIcon,
  CircleXIcon,
  EllipsisIcon,
  PlusIcon,
  RocketIcon,
  UserIcon
} from 'lucide-react'
import { toast } from 'sonner'
import { DateTime } from 'luxon'
import { Fragment, Suspense } from 'react'
import { Await } from 'react-router'

import { request as req } from '@repo/util/request'
import { Button } from '@repo/ui/components/ui/button'
import {
  Empty,
  EmptyContent,
  EmptyDescription,
  EmptyHeader,
  EmptyMedia,
  EmptyTitle
} from '@repo/ui/components/ui/empty'
import { Skeleton } from '@repo/ui/components/skeleton'
import { Card, CardContent } from '@repo/ui/components/ui/card'
import {
  Item,
  ItemActions,
  ItemContent,
  ItemDescription,
  ItemGroup,
  ItemMedia,
  ItemSeparator,
  ItemTitle
} from '@repo/ui/components/ui/item'
import { Link } from 'react-router'
import { Avatar, AvatarFallback } from '@repo/ui/components/ui/avatar'
import { initials } from '@repo/ui/lib/utils'
import { Abbr } from '@repo/ui/components/abbr'
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuSeparator,
  DropdownMenuTrigger
} from '@repo/ui/components/ui/dropdown-menu'
import {
  AlertDialog,
  AlertDialogAction,
  AlertDialogCancel,
  AlertDialogContent,
  AlertDialogDescription,
  AlertDialogFooter,
  AlertDialogHeader,
  AlertDialogTitle,
  AlertDialogTrigger
} from '@repo/ui/components/ui/alert-dialog'
import { Spinner } from '@repo/ui/components/ui/spinner'
import { useParams } from 'react-router'
import { useRevalidator } from 'react-router'

export function meta({}: Route.MetaArgs) {
  return [{ title: 'Matrículas agendadas' }]
}

export async function loader({ context, request, params }: Route.LoaderArgs) {
  const scheduled = req({
    url: `/orgs/${params.orgid}/enrollments/scheduled`,
    context,
    request
  }).then((r) => r.json())

  return {
    scheduled
  }
}

export default function Route({
  loaderData: { scheduled }
}: Route.ComponentProps) {
  return (
    <Suspense fallback={<Skeleton />}>
      <div className="space-y-0.5 mb-8">
        <h1 className="text-2xl font-bold tracking-tight">
          Matrículas agendadas
        </h1>
        <p className="text-muted-foreground">
          Acompanhe todas as matrículas agendadas, cancele quando quiser ou
          matricule imediatamente.
        </p>
      </div>

      <Await resolve={scheduled}>
        {({ items }) => {
          const scheduled = grouping(items)

          if (scheduled.length === 0) {
            return (
              <Empty className="border border-dashed">
                <EmptyHeader>
                  <EmptyMedia variant="icon">
                    <BanIcon />
                  </EmptyMedia>
                  <EmptyTitle>Nenhum agendamento ainda</EmptyTitle>
                  <EmptyDescription>
                    Agende a matrícula dos seus colaboradores de forma rápida e
                    organizada.
                  </EmptyDescription>
                </EmptyHeader>
                <EmptyContent>
                  <Button asChild>
                    <Link to="../enrollments/add">
                      <PlusIcon /> Agendar
                    </Link>
                  </Button>
                </EmptyContent>
              </Empty>
            )
          }

          return (
            <div className="space-y-5 lg:max-w-4xl mx-auto">
              {scheduled.map(([run_at, items], index) => (
                <div
                  className="grid grid-cols-1 lg:grid-cols-5 gap-2.5"
                  key={index}
                >
                  <div>
                    {DateTime.fromISO(run_at)
                      .setLocale('pt-BR')
                      .toFormat('cccc, dd LLL yyyy')}
                  </div>

                  <Card className="col-span-4">
                    <CardContent>
                      <ItemGroup>
                        {items.map(
                          (
                            { sk, user, course, created_by, scheduled_at },
                            index
                          ) => (
                            <Fragment key={index}>
                              <Item>
                                <ItemMedia className="hidden lg:block">
                                  <Avatar className="size-10 ">
                                    <AvatarFallback className="border">
                                      {initials(user.name)}
                                    </AvatarFallback>
                                  </Avatar>
                                </ItemMedia>
                                <ItemContent>
                                  <ItemTitle>{course.name}</ItemTitle>
                                  <ItemDescription className="flex flex-col">
                                    <Abbr>{user.name}</Abbr>
                                    <Abbr>{user.email}</Abbr>
                                  </ItemDescription>
                                  <div className="mt-1">
                                    <ul
                                      className="lg:flex gap-2.5 text-muted-foreground text-sm
                                                 *:flex *:gap-1 *:items-center"
                                    >
                                      <li>
                                        <CalendarIcon className="size-3.5" />{' '}
                                        {datetime.format(
                                          new Date(scheduled_at)
                                        )}
                                      </li>
                                      <li>
                                        <UserIcon className="size-3.5" />{' '}
                                        {created_by.name}
                                      </li>
                                    </ul>
                                  </div>
                                </ItemContent>
                                <ItemActions className="self-start">
                                  <ActionMenu sk={sk} />
                                </ItemActions>
                              </Item>

                              {index !== items.length - 1 && <ItemSeparator />}
                            </Fragment>
                          )
                        )}
                      </ItemGroup>
                    </CardContent>
                  </Card>
                </div>
              ))}
            </div>
          )
        }}
      </Await>
    </Suspense>
  )
}

function ActionMenu({ sk }: { sk: string }) {
  const { revalidate } = useRevalidator()

  const onSuccess = () => {
    revalidate()
  }

  return (
    <DropdownMenu>
      <DropdownMenuTrigger asChild>
        <Button variant="ghost" size="icon-sm" className="cursor-pointer">
          <EllipsisIcon />
        </Button>
      </DropdownMenuTrigger>

      <DropdownMenuContent align="end" className="*:cursor-pointer w-42">
        <DropdownMenuItem disabled>
          <RocketIcon /> Matricular agora
        </DropdownMenuItem>
        <DropdownMenuSeparator />
        <CancelItem sk={sk} onSuccess={onSuccess} />
      </DropdownMenuContent>
    </DropdownMenu>
  )
}

function CancelItem({ sk, onSuccess }: { sk: string; onSuccess?: () => void }) {
  const { orgid } = useParams()
  const [open, { set: setOpen }] = useToggle(false)
  const { runAsync, loading } = useRequest(
    async () => {
      const [scheduled_for, lock_hash] = sk.split('#')
      return await fetch(`/~/api/orgs/${orgid}/enrollments/scheduled`, {
        method: 'DELETE',
        headers: new Headers({ 'Content-Type': 'application/json' }),
        body: JSON.stringify({ scheduled_for, lock_hash })
      })
    },
    { manual: true }
  )

  const cancel = async (e: MouseEvent<HTMLButtonElement>) => {
    e.preventDefault()

    const r = await runAsync()
    if (r.ok) {
      toast.info('O agendamento foi cancelada.')
      onSuccess?.()
    }

    setOpen(false)
  }

  return (
    <AlertDialog open={open} onOpenChange={setOpen}>
      <AlertDialogTrigger asChild>
        <DropdownMenuItem
          variant="destructive"
          onSelect={(e) => e.preventDefault()}
        >
          <CircleXIcon /> Cancelar
        </DropdownMenuItem>
      </AlertDialogTrigger>
      <AlertDialogContent>
        <AlertDialogHeader>
          <AlertDialogTitle>Tem certeza absoluta?</AlertDialogTitle>
          <AlertDialogDescription>
            Esta ação não pode ser desfeita. Isso{' '}
            <span className="font-bold">
              cancela permanentemente o agendamento
            </span>{' '}
            desta matrícula.
          </AlertDialogDescription>
        </AlertDialogHeader>
        <AlertDialogFooter className="*:cursor-pointer">
          <AlertDialogAction asChild>
            <Button onClick={cancel} disabled={loading} variant="destructive">
              {loading ? <Spinner /> : null} Continuar
            </Button>
          </AlertDialogAction>
          <AlertDialogCancel>Cancelar</AlertDialogCancel>
        </AlertDialogFooter>
      </AlertDialogContent>
    </AlertDialog>
  )
}

function grouping(items) {
  const newItems = Object.entries(
    items.reduce((acc, item) => {
      const [run_at] = item.sk.split('#')

      if (!acc[run_at]) {
        acc[run_at] = []
      }

      acc[run_at].push(item)

      return acc
    }, [])
  )
  return newItems.sort((x, y) => x[0].localeCompare(y[0]))
}

const datetime = new Intl.DateTimeFormat('pt-BR', {
  day: '2-digit',
  month: '2-digit',
  year: 'numeric',
  hour: '2-digit',
  minute: '2-digit'
})