accounted/components/bookkeeping/year-end/PreviewStep.tsx

'use client'

import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card'
import { Button } from '@/components/ui/button'
import { Badge } from '@/components/ui/badge'
import { Skeleton } from '@/components/ui/skeleton'
import { ArrowRight, AlertTriangle } from 'lucide-react'
import {
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow,
} from '@/components/ui/table'
import { formatCurrency } from '@/lib/utils'
import type { YearEndPreview } from '@/types'

interface PreviewStepProps {
  preview: YearEndPreview | null
  isLoading: boolean
  error: string | null
  onBack: () => void
  onContinue: () => void
}

export function PreviewStep({ preview, isLoading, error, onBack, onContinue }: PreviewStepProps) {
  if (isLoading) {
    return (
      <Card>
        <CardContent className="p-6 space-y-3">
          <Skeleton className="h-6 w-1/3" />
          <Skeleton className="h-32 w-full" />
        </CardContent>
      </Card>
    )
  }

  if (error) {
    return (
      <Card>
        <CardContent className="p-6">
          <p className="text-destructive">{error}</p>
        </CardContent>
      </Card>
    )
  }

  if (!preview) return null

  const isProfit = preview.netResult > 0
  const isLoss = preview.netResult < 0

  return (
    <div className="space-y-6">
      <Card>
        <CardHeader>
          <CardTitle className="text-base">Årets resultat</CardTitle>
        </CardHeader>
        <CardContent>
          <div className="flex items-baseline justify-between">
            <div>
              <p className="text-sm text-muted-foreground">
                Nettoresultat överförs till {preview.closingAccount} {preview.closingAccountName}
              </p>
              {isProfit && <Badge variant="success" className="mt-2">Vinst</Badge>}
              {isLoss && <Badge variant="destructive" className="mt-2">Förlust</Badge>}
            </div>
            <p className="font-display text-3xl tabular-nums">
              {formatCurrency(preview.netResult)}
            </p>
          </div>
        </CardContent>
      </Card>

      {preview.bolagsskattMissing && (
        <Card>
          <CardHeader>
            <CardTitle className="text-base flex items-center gap-2">
              <AlertTriangle className="h-4 w-4 text-warning-foreground" />
              Ingen bolagsskatt är bokförd
            </CardTitle>
          </CardHeader>
          <CardContent className="space-y-2">
            <p className="text-sm">
              Året visar vinst men ingen skatt på årets resultat (konto 8910) finns bland de konton
              som stängs. Gå tillbaka till dispositionssteget och boka bolagsskatten innan du
              verkställer, om inte skattemässigt resultat är noll (t.ex. genom underskottsavdrag,
              avsättning till periodiseringsfond eller överavskrivningar).
            </p>
            <Button variant="outline" size="sm" onClick={onBack}>
              Till dispositionssteget
            </Button>
          </CardContent>
        </Card>
      )}

      {preview.currencyRevaluation && preview.currencyRevaluation.items.length > 0 && (
        <Card>
          <CardHeader>
            <CardTitle className="text-base">Kursrevaluering (ÅRL 4:13)</CardTitle>
            <p className="text-sm text-muted-foreground">
              Öppna fordringar/skulder i utländsk valuta värderas om till balansdagens kurs innan bokslut.
              Detta sker automatiskt som en del av verkställandet.
            </p>
          </CardHeader>
          <CardContent>
            <div className="grid grid-cols-3 gap-4 text-sm">
              <div>
                <p className="text-muted-foreground text-xs uppercase tracking-wider">Kursvinst</p>
                <p className="font-display text-xl tabular-nums">
                  {formatCurrency(preview.currencyRevaluation.totalGain)}
                </p>
              </div>
              <div>
                <p className="text-muted-foreground text-xs uppercase tracking-wider">Kursförlust</p>
                <p className="font-display text-xl tabular-nums">
                  {formatCurrency(preview.currencyRevaluation.totalLoss)}
                </p>
              </div>
              <div>
                <p className="text-muted-foreground text-xs uppercase tracking-wider">Nettoeffekt</p>
                <p className="font-display text-xl tabular-nums">
                  {formatCurrency(preview.currencyRevaluation.netEffect)}
                </p>
              </div>
            </div>
          </CardContent>
        </Card>
      )}

      <Card>
        <CardHeader>
          <CardTitle className="text-base">Bokslutsverifikation: förhandsgranskning</CardTitle>
          <p className="text-sm text-muted-foreground">
            {preview.closingLines.length} kontorader. Nollställer klass 3-8 mot {preview.closingAccount}.
          </p>
        </CardHeader>
        <CardContent className="p-0">
          <Table>
            <TableHeader>
              <TableRow>
                <TableHead>Konto</TableHead>
                <TableHead>Beskrivning</TableHead>
                <TableHead className="text-right">Debet</TableHead>
                <TableHead className="text-right">Kredit</TableHead>
              </TableRow>
            </TableHeader>
            <TableBody>
              {preview.closingLines.map((line, i) => (
                <TableRow key={i}>
                  <TableCell className="tabular-nums">{line.account_number}</TableCell>
                  <TableCell className="text-sm">{line.line_description}</TableCell>
                  <TableCell className="text-right tabular-nums">
                    {line.debit_amount > 0 ? formatCurrency(line.debit_amount) : '-'}
                  </TableCell>
                  <TableCell className="text-right tabular-nums">
                    {line.credit_amount > 0 ? formatCurrency(line.credit_amount) : '-'}
                  </TableCell>
                </TableRow>
              ))}
            </TableBody>
          </Table>
        </CardContent>
      </Card>

      <div className="flex justify-between">
        <Button variant="outline" onClick={onBack}>
          Tillbaka
        </Button>
        <Button onClick={onContinue}>
          Verkställ bokslut <ArrowRight className="ml-1 h-4 w-4" />
        </Button>
      </div>
    </div>
  )
}