"use client";

import { useEffect, useState } from "react";
import { Loader2, Pencil } from "lucide-react";
import { Button } from "@/components/ui/button";
import {
  Dialog,
  DialogContent,
  DialogFooter,
  DialogHeader,
  DialogTitle,
  DialogTrigger,
} from "@/components/ui/dialog";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { Switch } from "@/components/ui/switch";
import { getAssociations, updateAssociation } from "@/lib/api";
import type { Association } from "@/lib/models";

export function EditAssociationDialog({
  association,
  onSaved,
}: {
  association: Association;
  onSaved: (association: Association) => void;
}) {
  const [open, setOpen] = useState(false);
  const [saving, setSaving] = useState(false);
  const [name, setName] = useState(association.name);
  const [address, setAddress] = useState(association.address);
  const [vatNumber, setVatNumber] = useState(association.vatNumber ?? "");
  const [runtsId, setRuntsId] = useState(association.runtsId ?? "");
  const [nasFolderNumber, setNasFolderNumber] = useState(association.nasFolderNumber?.toString() ?? "");
  const [isShown, setIsShown] = useState(association.isShown ?? true);

  useEffect(() => {
    if (open) {
      setName(association.name);
      setAddress(association.address);
      setVatNumber(association.vatNumber ?? "");
      setRuntsId(association.runtsId ?? "");
      setNasFolderNumber(association.nasFolderNumber?.toString() ?? "");
      setIsShown(association.isShown ?? true);
    }
  }, [open, association]);

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    setSaving(true);
    try {
      if (nasFolderNumber.trim() !== "") {
        const folderNumber = Number(nasFolderNumber);
        const others = await getAssociations();
        const duplicate = others.find(
          (a) => a.id !== association.id && a.nasFolderNumber === folderNumber
        );
        if (duplicate) {
          const proceed = confirm(
            `Il numero cartella ${folderNumber} è già usato da "${duplicate.name}". Continuare comunque?`
          );
          if (!proceed) {
            setSaving(false);
            return;
          }
        }
      }

      const updated = await updateAssociation(association.id!, {
        ...association,
        name,
        address,
        vatNumber,
        runtsId,
        nasFolderNumber: nasFolderNumber.trim() === "" ? undefined : Number(nasFolderNumber),
        isShown,
      });
      onSaved(updated);
      setOpen(false);
    } catch (error) {
      console.error("Failed to update association:", error);
      alert("Impossibile salvare le modifiche");
    } finally {
      setSaving(false);
    }
  };

  return (
    <Dialog open={open} onOpenChange={setOpen}>
      <DialogTrigger asChild>
        <Button variant="outline">
          <Pencil className="size-4" />
          Modifica
        </Button>
      </DialogTrigger>
      <DialogContent className="sm:max-w-lg">
        <DialogHeader>
          <DialogTitle>Modifica associazione</DialogTitle>
        </DialogHeader>
        <form onSubmit={handleSubmit} className="space-y-5">
          <div className="grid gap-4 sm:grid-cols-2">
            <div className="space-y-2 sm:col-span-2">
              <Label htmlFor="e-name">Nome associazione *</Label>
              <Input id="e-name" value={name} onChange={(e) => setName(e.target.value)} required />
            </div>

            <div className="space-y-2 sm:col-span-2">
              <Label htmlFor="e-address">Indirizzo *</Label>
              <Input id="e-address" value={address} onChange={(e) => setAddress(e.target.value)} required />
            </div>

            <div className="space-y-2">
              <Label htmlFor="e-vatNumber">Partita IVA</Label>
              <Input id="e-vatNumber" value={vatNumber} onChange={(e) => setVatNumber(e.target.value)} />
            </div>

            <div className="space-y-2">
              <Label htmlFor="e-runtsId">Codice RUNTS</Label>
              <Input id="e-runtsId" value={runtsId} onChange={(e) => setRuntsId(e.target.value)} />
            </div>

            <div className="space-y-2">
              <Label htmlFor="e-nasFolderNumber">Numero cartella NAS</Label>
              <Input
                id="e-nasFolderNumber"
                type="number"
                value={nasFolderNumber}
                onChange={(e) => setNasFolderNumber(e.target.value)}
                placeholder="Usato per generare il codice di ratifica"
              />
            </div>

            <div className="flex items-center justify-between rounded-lg border p-3 sm:col-span-2">
              <div>
                <Label htmlFor="e-isShown">Associazione attiva</Label>
                <p className="text-sm text-muted-foreground">
                  Le associazioni non attive non compaiono nell&apos;elenco
                </p>
              </div>
              <Switch id="e-isShown" checked={isShown} onCheckedChange={setIsShown} />
            </div>
          </div>

          <DialogFooter>
            <Button type="button" variant="outline" onClick={() => setOpen(false)}>
              Annulla
            </Button>
            <Button type="submit" disabled={saving}>
              {saving && <Loader2 className="size-4 animate-spin" />}
              {saving ? "Salvataggio..." : "Salva modifiche"}
            </Button>
          </DialogFooter>
        </form>
      </DialogContent>
    </Dialog>
  );
}