"use client";

import Link from "next/link";
import { useEffect, useMemo, useState } from "react";
import {
  ArrowRight,
  CheckCircle2,
  Home,
  MapPin,
  Phone,
  Sparkles,
} from "lucide-react";

import { Button } from "@/components/ui/button";
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogFooter,
  DialogHeader,
  DialogTitle,
} from "@/components/ui/dialog";
import { Progress } from "@/components/ui/progress";

type UserRoleDto =
  | "SUPERADMIN"
  | "ADMIN"
  | "KOORDINATOR"
  | "ERZIEHER"
  | "ELTERN";

type OnboardingDialogProps = {
  user: {
    phone: string | null;
    street: string | null;
    postalCode: string | null;
    city: string | null;
    familyId: string | null;
    role: UserRoleDto;
  };
  family: {
    childrenCount: number;
  } | null;
};

const HIDE_ONBOARDING_DIALOG_KEY = "hideOnboardingDialog";

export function OnboardingDialog({ user, family }: OnboardingDialogProps) {
  const [open, setOpen] = useState(false);

  const status = useMemo(() => {
    const hasPhone = !!user.phone?.trim();
    const hasAddress =
      !!user.street?.trim() && !!user.postalCode?.trim() && !!user.city?.trim();
    const needsFamilyData = user.role !== "ERZIEHER";
    const hasFamilyAndChildren =
      !needsFamilyData || (!!user.familyId && !!family?.childrenCount);

    const missingItems = [
      !hasPhone ? { label: "Telefonnummer fehlt", icon: Phone } : null,
      !hasAddress ? { label: "Adresse fehlt", icon: MapPin } : null,
      !hasFamilyAndChildren
        ? { label: "Haushalts-/Kinderdaten unvollständig", icon: Home }
        : null,
    ].filter(Boolean) as { label: string; icon: typeof Phone }[];

    const completedCount = [hasPhone, hasAddress, hasFamilyAndChildren].filter(
      Boolean,
    ).length;
    const progress = completedCount === 3 ? 100 : completedCount * 33;

    return {
      completedCount,
      progress,
      missingItems,
      hasFamilyAndChildren,
      isComplete: completedCount === 3,
    };
  }, [family?.childrenCount, user]);

  useEffect(() => {
    if (status.isComplete) return;

    const hidden = localStorage.getItem(HIDE_ONBOARDING_DIALOG_KEY);
    if (hidden !== "true") {
      const timer = window.setTimeout(() => setOpen(true), 0);
      return () => window.clearTimeout(timer);
    }
  }, [status.isComplete]);

  if (status.isComplete) {
    return null;
  }

  const ctaLabel = status.hasFamilyAndChildren
    ? "Kontaktdaten hinterlegen"
    : "Haushalt & Kinder einrichten";

  function hidePermanently() {
    localStorage.setItem(HIDE_ONBOARDING_DIALOG_KEY, "true");
    setOpen(false);
  }

  return (
    <Dialog open={open} onOpenChange={setOpen}>
      <DialogContent className="overflow-hidden p-0 sm:max-w-xl">
        <div className="bg-emerald-950 px-6 py-6 text-white">
          <div className="mb-5 flex h-11 w-11 items-center justify-center rounded-full bg-emerald-300 text-emerald-950">
            <Sparkles className="h-5 w-5" />
          </div>
          <DialogHeader className="space-y-2 text-left">
            <DialogTitle className="text-2xl leading-tight">
              Dein Kita-Profil ist fast bereit
            </DialogTitle>
            <DialogDescription className="text-emerald-50/80">
              Vervollständige die wichtigsten Daten, damit Notdienst,
              Adressbuch und Familienverwaltung reibungslos funktionieren.
            </DialogDescription>
          </DialogHeader>
        </div>

        <div className="space-y-5 px-6 py-6">
          <div>
            <div className="mb-2 flex items-center justify-between gap-3 text-sm">
              <span className="font-medium">Profil-Fortschritt</span>
              <span className="text-muted-foreground">
                {status.completedCount}/3 erledigt
              </span>
            </div>
            <Progress value={status.progress} />
            <p className="mt-2 text-xs text-muted-foreground">
              {status.progress}% vollständig
            </p>
          </div>

          <div className="rounded-md border bg-muted/30 p-4">
            <p className="mb-3 text-sm font-medium">Noch offen</p>
            <ul className="space-y-2">
              {status.missingItems.map(({ label, icon: Icon }) => (
                <li key={label} className="flex items-center gap-2 text-sm">
                  <span className="flex h-6 w-6 items-center justify-center rounded-full bg-destructive/10 text-destructive">
                    <Icon className="h-3.5 w-3.5" />
                  </span>
                  {label}
                </li>
              ))}
            </ul>
          </div>

          <div className="flex items-start gap-2 rounded-md bg-emerald-50 p-3 text-sm text-emerald-950">
            <CheckCircle2 className="mt-0.5 h-4 w-4 shrink-0" />
            <p>
              Du kannst die App weiter nutzen. Diese Erinnerung hilft nur beim
              sauberen Einrichten der wichtigsten MVP-Daten.
            </p>
          </div>
        </div>

        <DialogFooter className="gap-2 border-t px-6 py-4 sm:justify-between sm:space-x-0">
          <Button type="button" variant="ghost" onClick={hidePermanently}>
            Nicht mehr anzeigen
          </Button>
          <Button asChild onClick={() => setOpen(false)}>
            <Link href="/dashboard/profil">
              {ctaLabel}
              <ArrowRight className="h-4 w-4" />
            </Link>
          </Button>
        </DialogFooter>
      </DialogContent>
    </Dialog>
  );
}