"use client"

import {
  AlertTriangle,
  Briefcase,
  Calendar,
  Contact,
  Database,
  ClipboardCheck,
  Cpu,
  Gavel,
  Globe,
  Layers,
  Scale,
  OctagonAlert,
  RotateCcw,
  ShieldCheck,
  Target,
  Timer,
  UserCheck,
  Users,
  type LucideIcon,
} from "lucide-react"

import { Badge } from "@/components/ui/badge"
import {
  Dialog,
  DialogBody,
  DialogContent,
  DialogHeader,
  DialogDescription,
  DialogTitle,
} from "@/components/ui/dialog"
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs"
import { MarkdownRenderer } from "@/components/markdown-renderer"
import { PrintPolicy } from "@/components/print-policy"
import { PrivacyPolicy } from "@/types/privacy-policy"
import { formatDate } from "@/lib/format"

interface PolicyDetailProps {
  policy: PrivacyPolicy | null
  open: boolean
  onOpenChange: (open: boolean) => void
}

interface Section {
  icon: LucideIcon
  label: string
  content?: string | null
}

function SectionBlock({ icon: Icon, label, content }: Section) {
  if (!content) return null

  return (
    <section className="space-y-2">
      <h3 className="flex items-center gap-2 text-sm font-semibold">
        <Icon className="size-4 text-brand" />
        {label}
      </h3>
      <div className="rounded-lg border bg-muted/30 p-4">
        <MarkdownRenderer content={content} />
      </div>
    </section>
  )
}

export function PolicyDetail({ policy, open, onOpenChange }: PolicyDetailProps) {
  const responsibleSections: Section[] = policy
    ? [
        { icon: Contact, label: "Verantwortlicher im Sinne der DSGVO", content: policy.responsible },
        { icon: ShieldCheck, label: "Kontaktdaten der/des Datenschutzbeauftragten", content: policy.contactDPO },
      ]
    : []

  const processingSections: Section[] = policy
    ? [
        { icon: Briefcase, label: "Bezeichnung der Verarbeitungstätigkeit", content: policy.processingDescription },
        { icon: Target, label: "Zweck der Datenerhebung", content: policy.processingPurposes },
        { icon: Gavel, label: "Rechtsgrundlage der Verarbeitung", content: policy.legalBasis },
        { icon: Scale, label: "Berechtigte Interessen", content: policy.legitimateInterests },
        { icon: Layers, label: "Kategorien der verarbeiteten Daten", content: policy.dataCategories },
        { icon: Users, label: "Geplante Empfänger der Daten", content: policy.recipients },
        { icon: Globe, label: "Übermittlung in Drittländer", content: policy.thirdCountryTransfer },
        { icon: Timer, label: "Speicherdauer", content: policy.storageDuration },
        { icon: Database, label: "Herkunft der Daten", content: policy.dataSource },
        { icon: Cpu, label: "Automatisierte Entscheidungsfindung", content: policy.automatedDecision },
      ]
    : []

  const rightsSections: Section[] = policy
    ? [
        { icon: UserCheck, label: "Betroffenen-Rechte", content: policy.dataSubjectsRights },
        { icon: AlertTriangle, label: "Beschwerderecht bei der Aufsichtsbehörde", content: policy.complaintRight },
        { icon: RotateCcw, label: "Widerrufsrecht bei Einwilligung", content: policy.withdrawalRight },
        { icon: OctagonAlert, label: "Widerspruchsrecht (Art. 21 DSGVO)", content: policy.objectionRight },
        { icon: ClipboardCheck, label: "Ihre Pflicht zur Bereitstellung der Daten", content: policy.provisionObligation },
        { icon: OctagonAlert, label: "Folgen, wenn Sie die Daten nicht angeben", content: policy.provisionConsequences },
      ]
    : []

  return (
    <Dialog open={open} onOpenChange={onOpenChange}>
      <DialogContent className="max-h-[calc(100dvh-2rem)] sm:max-w-3xl">
        {policy && (
          <>
            <DialogHeader>
              <div className="flex flex-wrap items-start justify-between gap-4">
                <div className="min-w-0 space-y-2">
                  <DialogTitle>{policy.title}</DialogTitle>
                  <DialogDescription>Vorschau der Datenschutzerklärung</DialogDescription>
                  <div className="flex flex-wrap items-center gap-x-3 gap-y-1 text-sm text-muted-foreground">
                    <span className="flex items-center gap-1.5">
                      <Calendar className="size-4" />
                      Erstellt am {formatDate(policy.createdAt)}
                    </span>
                    {policy.updatedAt !== policy.createdAt && (
                      <span>Aktualisiert am {formatDate(policy.updatedAt)}</span>
                    )}
                    <Badge variant="brand">DSGVO</Badge>
                  </div>
                </div>
                <PrintPolicy policy={policy} size="sm" className="mr-8" />
              </div>
            </DialogHeader>

            <Tabs defaultValue="responsible" className="min-h-0 flex-1">
              <TabsList className="w-full">
                <TabsTrigger value="responsible">Verantwortlich</TabsTrigger>
                <TabsTrigger value="processing">Verarbeitung</TabsTrigger>
                <TabsTrigger value="rights">Ihre Rechte</TabsTrigger>
              </TabsList>

              <DialogBody>
                <TabsContent value="responsible" className="space-y-5 py-1">
                  {responsibleSections.map((section) => (
                    <SectionBlock key={section.label} {...section} />
                  ))}
                </TabsContent>

                <TabsContent value="processing" className="space-y-5 py-1">
                  {processingSections.map((section) => (
                    <SectionBlock key={section.label} {...section} />
                  ))}
                </TabsContent>

                <TabsContent value="rights" className="space-y-5 py-1">
                  {rightsSections.map((section) => (
                    <SectionBlock key={section.label} {...section} />
                  ))}
                </TabsContent>
              </DialogBody>
            </Tabs>
          </>
        )}
      </DialogContent>
    </Dialog>
  )
}