"use client";

import { zodResolver } from "@hookform/resolvers/zod";
import { useForm } from "react-hook-form";
import { updateUser } from "@/actions/users";
import { Button } from "@/components/ui/button";
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
import { useServerAction } from "@/hooks/use-server-action";
import { type UpdateUserInput, updateUserSchema } from "@/lib/validators/user";

interface UserEditFormProps {
  user: {
    id: number;
    username: string;
    mail: string;
    rank: number;
    motto: string;
    credits: number;
    pixels: number;
    diamonds: number;
    duckets: number;
  };
  /** Ranks loaded from the `permissions` table (id + human-readable name). */
  ranks?: Array<{ id: number; name: string }>;
}

// Fallback used if the page does not supply the DB-loaded rank list.
const FALLBACK_RANKS: Array<{ id: number; name: string }> = [
  { id: 1, name: "User" },
  { id: 2, name: "Bronze" },
  { id: 3, name: "Silver" },
  { id: 4, name: "Gold" },
  { id: 5, name: "Moderator" },
  { id: 6, name: "Admin" },
  { id: 7, name: "Super Admin" },
];

export function UserEditForm({ user, ranks }: UserEditFormProps) {
  const rankOptions = ranks && ranks.length > 0 ? ranks : FALLBACK_RANKS;
  const { isPending, run } = useServerAction();

  const {
    register,
    handleSubmit,
    setValue,
    formState: { errors },
  } = useForm<UpdateUserInput>({
    resolver: zodResolver(updateUserSchema),
    defaultValues: {
      username: user.username,
      mail: user.mail,
      rank: user.rank,
      motto: user.motto,
      credits: user.credits,
      pixels: user.pixels,
      diamonds: user.diamonds,
      duckets: user.duckets,
    },
  });

  function onSubmit(data: UpdateUserInput) {
    run(() => updateUser({ id: user.id, ...data }), {
      successMessage: "User updated successfully.",
    });
  }

  return (
    <Card>
      <CardHeader>
        <CardTitle>Edit User</CardTitle>
      </CardHeader>
      <CardContent>
        <form onSubmit={handleSubmit(onSubmit)} className="space-y-4">
          <div className="grid gap-4 sm:grid-cols-2">
            <div className="space-y-2">
              <Label htmlFor="username">Username</Label>
              <Input id="username" {...register("username")} />
              {errors.username && <p className="text-sm text-destructive">{errors.username.message}</p>}
            </div>
            <div className="space-y-2">
              <Label htmlFor="mail">Email</Label>
              <Input id="mail" type="email" {...register("mail")} />
              {errors.mail && <p className="text-sm text-destructive">{errors.mail.message}</p>}
            </div>
          </div>

          <div className="grid gap-4 sm:grid-cols-2">
            <div className="space-y-2">
              <Label htmlFor="rank">Rank</Label>
              <Select
                defaultValue={String(user.rank)}
                onValueChange={(v) => setValue("rank", parseInt(v, 10))}
              >
                <SelectTrigger>
                  <SelectValue placeholder="Select rank" />
                </SelectTrigger>
                <SelectContent>
                  {rankOptions.map((r) => (
                    <SelectItem key={r.id} value={String(r.id)}>
                      {r.id} — {r.name}
                    </SelectItem>
                  ))}
                </SelectContent>
              </Select>
            </div>
            <div className="space-y-2">
              <Label htmlFor="motto">Motto</Label>
              <Input id="motto" {...register("motto")} />
            </div>
          </div>

          <div className="grid gap-4 sm:grid-cols-2 lg:grid-cols-4">
            <div className="space-y-2">
              <Label htmlFor="credits">Credits</Label>
              <Input id="credits" type="number" {...register("credits", { valueAsNumber: true })} />
            </div>
            <div className="space-y-2">
              <Label htmlFor="pixels">Pixels</Label>
              <Input id="pixels" type="number" {...register("pixels", { valueAsNumber: true })} />
            </div>
            <div className="space-y-2">
              <Label htmlFor="diamonds">Diamonds</Label>
              <Input id="diamonds" type="number" {...register("diamonds", { valueAsNumber: true })} />
            </div>
            <div className="space-y-2">
              <Label htmlFor="duckets">Duckets</Label>
              <Input id="duckets" type="number" {...register("duckets", { valueAsNumber: true })} />
            </div>
          </div>

          <Button type="submit" disabled={isPending}>
            {isPending ? "Saving..." : "Save Changes"}
          </Button>
        </form>
      </CardContent>
    </Card>
  );
}