'use client';

import { useRouter } from 'next/navigation';

import { zodResolver } from '@hookform/resolvers/zod';
import { useAction } from 'next-safe-action/hooks';
import { useForm } from 'react-hook-form';

import { Button } from '@kit/ui/button';
import { Card, CardContent, CardHeader, CardTitle } from '@kit/ui/card';
import {
  Form,
  FormControl,
  FormField,
  FormItem,
  FormLabel,
  FormMessage,
} from '@kit/ui/form';
import { Input } from '@kit/ui/input';
import { toast } from '@kit/ui/sonner';

import { CreateCourseSchema } from '../schema/course.schema';
import { createCourse } from '../server/actions/course-actions';

interface Props {
  accountId: string;
  account: string;
}

export function CreateCourseForm({ accountId, account }: Props) {
  const router = useRouter();
  const form = useForm({
    resolver: zodResolver(CreateCourseSchema),
    defaultValues: {
      accountId,
      courseNumber: '',
      name: '',
      description: '',
      startDate: '',
      endDate: '',
      fee: 0,
      reducedFee: 0,
      capacity: 20,
      minParticipants: 5,
      status: 'planned' as const,
      registrationDeadline: '',
      notes: '',
    },
  });

  const { execute, isPending } = useAction(createCourse, {
    onSuccess: ({ data }) => {
      if (data?.success) {
        toast.success('Kurs erfolgreich erstellt');
        router.push(`/home/${account}/courses`);
      }
    },
    onError: ({ error }) => {
      toast.error(error.serverError ?? 'Fehler beim Erstellen des Kurses');
    },
  });

  return (
    <Form {...form}>
      <form
        onSubmit={form.handleSubmit((data) => execute(data))}
        className="space-y-6"
      >
        <Card>
          <CardHeader>
            <CardTitle>Grunddaten</CardTitle>
          </CardHeader>
          <CardContent className="grid grid-cols-1 gap-4 sm:grid-cols-2">
            <FormField
              control={form.control}
              name="courseNumber"
              render={({ field }) => (
                <FormItem>
                  <FormLabel>Kursnummer</FormLabel>
                  <FormControl>
                    <Input {...field} />
                  </FormControl>
                  <FormMessage />
                </FormItem>
              )}
            />
            <FormField
              control={form.control}
              name="name"
              render={({ field }) => (
                <FormItem>
                  <FormLabel>Kursname *</FormLabel>
                  <FormControl>
                    <Input {...field} />
                  </FormControl>
                  <FormMessage />
                </FormItem>
              )}
            />
            <div className="sm:col-span-2">
              <FormField
                control={form.control}
                name="description"
                render={({ field }) => (
                  <FormItem>
                    <FormLabel>Beschreibung</FormLabel>
                    <FormControl>
                      <textarea
                        {...field}
                        className="border-input bg-background flex min-h-[80px] w-full rounded-md border px-3 py-2 text-sm"
                      />
                    </FormControl>
                    <FormMessage />
                  </FormItem>
                )}
              />
            </div>
          </CardContent>
        </Card>

        <Card>
          <CardHeader>
            <CardTitle>Zeitplan</CardTitle>
          </CardHeader>
          <CardContent className="grid grid-cols-1 gap-4 sm:grid-cols-3">
            <FormField
              control={form.control}
              name="startDate"
              render={({ field }) => (
                <FormItem>
                  <FormLabel>Startdatum</FormLabel>
                  <FormControl>
                    <Input type="date" {...field} />
                  </FormControl>
                  <FormMessage />
                </FormItem>
              )}
            />
            <FormField
              control={form.control}
              name="endDate"
              render={({ field }) => (
                <FormItem>
                  <FormLabel>Enddatum</FormLabel>
                  <FormControl>
                    <Input type="date" {...field} />
                  </FormControl>
                  <FormMessage />
                </FormItem>
              )}
            />
            <FormField
              control={form.control}
              name="registrationDeadline"
              render={({ field }) => (
                <FormItem>
                  <FormLabel>Anmeldeschluss</FormLabel>
                  <FormControl>
                    <Input type="date" {...field} />
                  </FormControl>
                  <FormMessage />
                </FormItem>
              )}
            />
          </CardContent>
        </Card>

        <Card>
          <CardHeader>
            <CardTitle>Kapazität</CardTitle>
          </CardHeader>
          <CardContent className="grid grid-cols-1 gap-4 sm:grid-cols-2">
            <FormField
              control={form.control}
              name="capacity"
              render={({ field }) => (
                <FormItem>
                  <FormLabel>Max. Teilnehmer</FormLabel>
                  <FormControl>
                    <Input
                      type="number"
                      min={1}
                      {...field}
                      onChange={(e) => field.onChange(Number(e.target.value))}
                    />
                  </FormControl>
                  <FormMessage />
                </FormItem>
              )}
            />
            <FormField
              control={form.control}
              name="minParticipants"
              render={({ field }) => (
                <FormItem>
                  <FormLabel>Min. Teilnehmer</FormLabel>
                  <FormControl>
                    <Input
                      type="number"
                      min={0}
                      {...field}
                      onChange={(e) => field.onChange(Number(e.target.value))}
                    />
                  </FormControl>
                  <FormMessage />
                </FormItem>
              )}
            />
            <FormField
              control={form.control}
              name="fee"
              render={({ field }) => (
                <FormItem>
                  <FormLabel>Gebühr (€)</FormLabel>
                  <FormControl>
                    <Input
                      type="number"
                      min={0}
                      step="0.01"
                      {...field}
                      onChange={(e) => field.onChange(Number(e.target.value))}
                    />
                  </FormControl>
                  <FormMessage />
                </FormItem>
              )}
            />
            <FormField
              control={form.control}
              name="reducedFee"
              render={({ field }) => (
                <FormItem>
                  <FormLabel>Ermäßigte Gebühr (€)</FormLabel>
                  <FormControl>
                    <Input
                      type="number"
                      min={0}
                      step="0.01"
                      {...field}
                      onChange={(e) => field.onChange(Number(e.target.value))}
                    />
                  </FormControl>
                  <FormMessage />
                </FormItem>
              )}
            />
          </CardContent>
        </Card>

        <Card>
          <CardHeader>
            <CardTitle>Status</CardTitle>
          </CardHeader>
          <CardContent className="grid grid-cols-1 gap-4 sm:grid-cols-2">
            <FormField
              control={form.control}
              name="status"
              render={({ field }) => (
                <FormItem>
                  <FormLabel>Kursstatus</FormLabel>
                  <FormControl>
                    <select
                      {...field}
                      className="border-input bg-background flex h-10 w-full rounded-md border px-3 py-2 text-sm"
                    >
                      <option value="planned">Geplant</option>
                      <option value="open">Offen</option>
                      <option value="running">Laufend</option>
                      <option value="completed">Abgeschlossen</option>
                      <option value="cancelled">Abgesagt</option>
                    </select>
                  </FormControl>
                  <FormMessage />
                </FormItem>
              )}
            />
            <div className="sm:col-span-1">
              <FormField
                control={form.control}
                name="notes"
                render={({ field }) => (
                  <FormItem>
                    <FormLabel>Notizen</FormLabel>
                    <FormControl>
                      <textarea
                        {...field}
                        className="border-input bg-background flex min-h-[80px] w-full rounded-md border px-3 py-2 text-sm"
                      />
                    </FormControl>
                    <FormMessage />
                  </FormItem>
                )}
              />
            </div>
          </CardContent>
        </Card>

        <div className="flex justify-end gap-2">
          <Button type="button" variant="outline" onClick={() => router.back()}>
            Abbrechen
          </Button>
          <Button type="submit" disabled={isPending}>
            {isPending ? 'Wird erstellt...' : 'Kurs erstellen'}
          </Button>
        </div>
      </form>
    </Form>
  );
}