import { zodResolver } from '@hookform/resolvers/zod'
import { Loader2 } from 'lucide-react'
import { useForm } from 'react-hook-form'
import { toast } from 'sonner'
import { FormError, FormField, PasswordInput } from '@/components/form-field'
import { LogoutButton } from '@/components/layout/app-layout'
import { PageLoading } from '@/components/page'
import { Button } from '@/components/ui/button'
import { Input } from '@/components/ui/input'
import { Section } from '@/features/planning/plan-read'
import { useMe } from '@/lib/auth'
import { useChangePassword, useUpdateProfile } from '@/lib/household'
import { t } from '@/lib/strings'
import type { MeResponse } from '@/types/MeResponse'
import { nameSchema, passwordSchema, type NameForm, type PasswordForm } from './schemas'
import { SettingsSubpage } from './subpage'

const s = t.settings.account
const message = (e: unknown) => (e instanceof Error ? e.message : String(e))

/** Ayarlar → Hesabım: ad, e-posta (salt okunur), şifre değiştirme, çıkış */
export function AccountPage() {
  const me = useMe()
  return (
    <SettingsSubpage title={s.title} description={s.description}>
      {!me.data ? (
        <PageLoading />
      ) : (
        <div className="max-w-xl space-y-4">
          <Profile me={me.data} />
          <ChangePassword />
          <div className="flex justify-end">
            <LogoutButton />
          </div>
        </div>
      )}
    </SettingsSubpage>
  )
}

function Profile({ me }: { me: MeResponse }) {
  const update = useUpdateProfile()
  const {
    register,
    handleSubmit,
    setError,
    reset,
    formState: { errors, isDirty },
  } = useForm<NameForm>({
    resolver: zodResolver(nameSchema),
    mode: 'onTouched',
    defaultValues: { name: me.user.name },
  })
  const onSubmit = handleSubmit(async (v) => {
    try {
      const next = await update.mutateAsync(v.name)
      reset({ name: next.user.name })
      toast.success(s.saved)
    } catch (e) {
      setError('name', { message: message(e) })
    }
  })
  return (
    <Section title={s.profile}>
      <form onSubmit={onSubmit} className="space-y-4" noValidate>
        <FormField label={s.name} error={errors.name}>
          {(f) => <Input {...f} {...register('name')} autoComplete="name" maxLength={80} />}
        </FormField>
        <FormField label={s.email} hint={s.emailHint}>
          {(f) => <Input {...f} value={me.user.email} readOnly disabled />}
        </FormField>
        <p className="text-sm">
          <span className="text-muted-foreground">{s.role}: </span>
          {me.user.role === 'owner' ? t.account.owner : t.account.member} · {me.household.name}
        </p>
        <Button type="submit" disabled={!isDirty || update.isPending}>
          {update.isPending && <Loader2 className="animate-spin" aria-hidden />}
          {s.save}
        </Button>
      </form>
    </Section>
  )
}

function ChangePassword() {
  const change = useChangePassword()
  const {
    register,
    handleSubmit,
    setError,
    reset,
    formState: { errors, isSubmitting },
  } = useForm<PasswordForm>({
    resolver: zodResolver(passwordSchema),
    mode: 'onTouched',
    defaultValues: { current_password: '', new_password: '', repeat: '' },
  })
  const onSubmit = handleSubmit(async (v) => {
    try {
      await change.mutateAsync({
        current_password: v.current_password,
        new_password: v.new_password,
      })
      reset()
      toast.success(s.changed)
    } catch (e) {
      const msg = message(e)
      // "Mevcut şifre hatalı" → ilgili alana; diğerleri formun altına
      if (/mevcut/i.test(msg)) setError('current_password', { message: msg }, { shouldFocus: true })
      else setError('root', { message: msg })
    }
  })
  return (
    <Section title={s.password}>
      <form onSubmit={onSubmit} className="space-y-4" noValidate>
        <p className="text-sm text-muted-foreground">{s.otherDevices}</p>
        {/* Parola yöneticileri için gizli kullanıcı adı alanı */}
        <input
          type="text"
          autoComplete="username"
          className="hidden"
          readOnly
          aria-hidden
          tabIndex={-1}
        />
        <FormField label={s.current} error={errors.current_password}>
          {(f) => (
            <PasswordInput
              {...f}
              {...register('current_password')}
              autoComplete="current-password"
            />
          )}
        </FormField>
        <FormField label={s.next} error={errors.new_password} hint={s.nextHint}>
          {(f) => (
            <PasswordInput {...f} {...register('new_password')} autoComplete="new-password" />
          )}
        </FormField>
        <FormField label={s.repeat} error={errors.repeat}>
          {(f) => <PasswordInput {...f} {...register('repeat')} autoComplete="new-password" />}
        </FormField>
        <FormError message={errors.root?.message} />
        <Button type="submit" disabled={isSubmitting}>
          {isSubmitting && <Loader2 className="animate-spin" aria-hidden />}
          {s.change}
        </Button>
      </form>
    </Section>
  )
}