import {
  BanIcon,
  CheckCircle2Icon,
  CircleDashedIcon,
  ClockIcon,
  EllipsisIcon,
  HelpCircleIcon,
  PlusIcon,
  type LucideIcon
} from 'lucide-react'
import { Fragment } from 'react'

import { Abbr } from '@repo/ui/components/abbr'
import { DateTime } from '@repo/ui/components/datetime'
import { Avatar, AvatarFallback } from '@repo/ui/components/ui/avatar'
import { Badge } from '@repo/ui/components/ui/badge'
import { Button } from '@repo/ui/components/ui/button'
import {
  Card,
  CardAction,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle
} from '@repo/ui/components/ui/card'
import {
  HoverCard,
  HoverCardContent,
  HoverCardTrigger
} from '@repo/ui/components/ui/hover-card'
import { Kbd } from '@repo/ui/components/ui/kbd'
import {
  Popover,
  PopoverContent,
  PopoverTrigger
} from '@repo/ui/components/ui/popover'
import { Spinner } from '@repo/ui/components/ui/spinner'
import {
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow
} from '@repo/ui/components/ui/table'
import { cn, initials } from '@repo/ui/lib/utils'
import { NavLink } from 'react-router'
import type { Enrollment, Seat } from './route'

const dtOptions: Intl.DateTimeFormatOptions = {
  hour: '2-digit',
  minute: '2-digit'
}

export function Enrollments({
  enrollments,
  seats
}: {
  enrollments: Enrollment[]
  seats: Seat[]
}) {
  return (
    <Card className="lg:max-w-4xl mx-auto">
      <CardHeader>
        <CardTitle className="text-xl">Matrículas relacionadas</CardTitle>
        <CardDescription>
          Acompanhe os detalhes de todas as matrículas efetuadas relacionadas a
          esta compra.
        </CardDescription>

        <CardAction>
          <SeatsMenu seats={seats} />
        </CardAction>
      </CardHeader>

      <CardContent>
        <Table>
          <TableHeader className="pointer-events-none">
            <TableRow>
              <TableHead>Colaborador</TableHead>
              <TableHead>Curso</TableHead>
              <TableHead>Status</TableHead>
              <TableHead>Executada em</TableHead>
              <TableHead>Revogada em</TableHead>
            </TableRow>
          </TableHeader>
          <TableBody className="[&_tr]:hover:bg-transparent">
            {enrollments.map(
              (
                {
                  user,
                  course,
                  status,
                  executed_at,
                  rollback_at,
                  reason: reason_
                },
                idx
              ) => {
                const friendlyReason = reason_ ? reason(reason_) : null

                return (
                  <TableRow key={idx}>
                    <TableCell>
                      <div className="flex gap-2.5 items-center">
                        <Avatar className="size-10 hidden lg:block">
                          <AvatarFallback className="border">
                            {initials(user.name)}
                          </AvatarFallback>
                        </Avatar>

                        <ul>
                          <li className="font-bold">
                            <Abbr>{user.name}</Abbr>
                          </li>
                          <li className="text-muted-foreground text-sm">
                            <Abbr>{user.email}</Abbr>
                          </li>
                        </ul>
                      </div>
                    </TableCell>
                    <TableCell>
                      <Abbr>{course.name}</Abbr>
                    </TableCell>
                    <TableCell>
                      {friendlyReason ? (
                        <HoverCard openDelay={0}>
                          <HoverCardTrigger>
                            <Status status={status} />
                          </HoverCardTrigger>
                          <HoverCardContent align="end" className="text-sm">
                            <p className="flex gap-1">
                              <HelpCircleIcon className="size-4.5 mt-px" />{' '}
                              {friendlyReason}
                            </p>
                          </HoverCardContent>
                        </HoverCard>
                      ) : (
                        <Status status={status} />
                      )}
                    </TableCell>
                    <TableCell>
                      {executed_at ? (
                        <DateTime options={dtOptions}>{executed_at}</DateTime>
                      ) : null}
                    </TableCell>

                    <TableCell>
                      {rollback_at ? (
                        <DateTime options={dtOptions}>{rollback_at}</DateTime>
                      ) : null}
                    </TableCell>
                  </TableRow>
                )
              }
            )}

            {enrollments.length === 0 && (
              <TableRow>
                <TableCell className="text-center h-24" colSpan={5}>
                  Nenhuma matrícula ainda.
                </TableCell>
              </TableRow>
            )}
          </TableBody>
        </Table>
      </CardContent>
    </Card>
  )
}

const reasons: Record<string, string> = {
  DEDUPLICATION: 'Matrícula ou agendamento já existentes.',
  CANCELLATION: 'Cancelamento da matrícula.',
  UNSCHEDULED: 'Cancelamento do agendamento da matrícula.',
  DEADLINE: 'Data do agendamento é anterior ao dia do pagamento.'
} as const

const reason = (reason_: string): string | null => {
  return reason_ in reasons ? reasons[reason_] : null
}

const statuses: Record<string, { icon: LucideIcon; color?: string }> = {
  PENDING: {
    icon: CircleDashedIcon,
    color: 'text-blue-400 [&_svg]:text-blue-500'
  },
  SCHEDULED: {
    icon: ClockIcon,
    color: 'text-blue-400 [&_svg]:text-blue-500'
  },
  EXECUTED: {
    icon: CheckCircle2Icon,
    color: 'text-green-400 [&_svg]:text-green-500'
  },
  ROLLBACK: {
    icon: BanIcon,
    color: 'text-orange-400 [&_svg]:text-orange-500'
  }
}

const labels: Record<string, string> = {
  PENDING: 'Pendente',
  EXECUTED: 'Executada',
  SCHEDULED: 'Agendada',
  ROLLBACK: 'Revogada'
}

function Status({ status: s }: { status: string }) {
  const status = labels[s] ?? s
  const { icon: Icon, color } = statuses?.[s] ?? { icon: HelpCircleIcon }

  return (
    <Badge variant="outline" className={cn(color, 'px-1.5')}>
      <Icon className={cn('stroke-2', color)} />
      {status}
    </Badge>
  )
}

function SeatsMenu({ seats: seats_ }: { seats: Seat[] }) {
  const seats = Object.values(
    seats_.reduce((acc: any, { course }) => {
      acc[course.id] ??= { course, quantity: 0 }
      acc[course.id].quantity++
      return acc
    }, {})
  ) as { course: Seat['course']; quantity: number }[]

  return (
    <Popover>
      <PopoverTrigger asChild>
        <Button
          variant="ghost"
          size="icon-sm"
          className="cursor-pointer relative"
        >
          {seats.length > 0 && (
            <span className="absolute flex size-2 -top-0.5 -right-0.5">
              <span className="absolute inline-flex h-full w-full animate-ping rounded-full bg-green-400 opacity-75"></span>
              <span className="relative inline-flex size-2 rounded-full bg-green-500"></span>
            </span>
          )}
          <EllipsisIcon />
        </Button>
      </PopoverTrigger>
      <PopoverContent align="end" className="w-82">
        <div className="grid gap-4">
          {seats.length > 0 ? (
            <>
              <div className="space-y-2">
                <h4 className="leading-none font-medium">Matrículas abertas</h4>
                <p className="text-muted-foreground text-sm">
                  Matrículas permanecem abertas devido à ausência de
                  colaborador.
                </p>
              </div>

              <div className="text-sm grid grid-cols-[1fr_15%] gap-1">
                {seats.map(({ course, quantity }, idx) => {
                  return (
                    <Fragment key={idx}>
                      <Abbr>{course.name}</Abbr>
                      <div className="flex justify-end">
                        <Kbd className="border">{quantity}x</Kbd>
                      </div>
                    </Fragment>
                  )
                })}
              </div>

              <Button size="sm" variant="outline" asChild>
                <NavLink to="../enrollments/seats">
                  {({ isPending }) => (
                    <>{isPending ? <Spinner /> : <PlusIcon />} Matricular</>
                  )}
                </NavLink>
              </Button>
            </>
          ) : (
            <p className="text-sm text-muted-foreground">
              Não há matrículas abertas pertencentes a esta compra.
            </p>
          )}
        </div>
      </PopoverContent>
    </Popover>
  )
}