"use client";

import { zodResolver } from "@hookform/resolvers/zod";
import { useForm } from "react-hook-form";
import { z } from "zod";
import { Button } from "@/components/ui/button";
import {
  Form,
  FormControl,
  FormField,
  FormItem,
  FormMessage,
} from "@/components/ui/form";

const formSchema = z.object({
  username: z.string().min(2, {
    message: "Username must be at least 2 characters.",
  }),
});

import React from "react";
import { Input } from "@/components/ui/input";
import { groupSchema } from "@/lib/validations/group";
import { api } from "@/trpc/react";
import { useRouter } from "next/navigation";
import type { Group } from "@/server/db/schema";
import { Textarea } from "@/components/ui/textarea";

function GroupForm({ initialGroup }: { initialGroup?: Group }) {
  const router = useRouter();
  const utils = api.useUtils();
  const createGroup = api.group.create.useMutation({
    onSuccess(group) {
      router.push(`/group/${group?.id}`);
      utils.invalidate();
    },
  });
  const updateGroup = api.group.update.useMutation({
    onSuccess() {
      utils.group.get.invalidate({ id: initialGroup?.id });
    },
  });
  const form = useForm<z.infer<typeof groupSchema>>({
    resolver: zodResolver(groupSchema),
    defaultValues: {
      name: initialGroup?.name ?? "",
      description: initialGroup?.description ?? "",
    },
  });

  const existing = Boolean(initialGroup?.id?.length);

  function onSubmit(group: z.infer<typeof groupSchema>) {
    if (existing) {
      updateGroup.mutate({ group, groupId: initialGroup?.id! });
    } else {
      createGroup.mutate({ group });
    }
  }

  return (
    <Form {...form}>
      <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-8">
        <FormField
          control={form.control}
          name="name"
          render={({ field }) => (
            <FormItem>
              <FormControl>
                <Input
                  autoFocus={!existing}
                  placeholder="What is your groups name?"
                  {...field}
                />
              </FormControl>
              <FormMessage />
            </FormItem>
          )}
        />
        <FormField
          control={form.control}
          name="description"
          render={({ field }) => (
            <FormItem>
              <FormControl>
                <Textarea placeholder="What is your groups name?" {...field} />
              </FormControl>
              <FormMessage />
            </FormItem>
          )}
        />
        <Button type="submit" className="w-full">
          {existing ? "Update" : "Create"} Group
        </Button>
      </form>
    </Form>
  );
}

export default GroupForm;