'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>
  )
}