'use client'

import { useEffect, useState } from 'react'
import { useRouter } from 'next/navigation'
import {
  RenterAuthError,
  clearRenterSession,
  loadRenterPreferences,
  loadRenterProfile,
  updateRenterPreferences,
  updateRenterProfile,
  type RenterPreference,
  type RenterProfile,
} from '@/lib/renter'
import { useStorefrontPreferences } from '@/components/StorefrontShell'

type Status = 'loading' | 'ready' | 'error'
const RENTER_EVENTS = ['BOOKING_CONFIRMED', 'BOOKING_REMINDER', 'RETURN_REMINDER', 'REFUND_ISSUED', 'NEW_OFFER']
const RENTER_CHANNELS = ['EMAIL', 'SMS', 'WHATSAPP', 'PUSH', 'IN_APP']

export default function RenterProfilePage() {
  const router = useRouter()
  const { language } = useStorefrontPreferences()
  const dict = {
    en: {
      profile: 'Profile',
      loading: 'Loading profile…',
      loadFailed: 'Could not load profile.',
      yourProfile: 'Your profile',
      firstName: 'First name',
      lastName: 'Last name',
      email: 'Email',
      phone: 'Phone',
      locale: 'Locale',
      currency: 'Currency',
      saving: 'Saving…',
      saveProfile: 'Save profile',
      verification: 'Verification',
      verified: 'Email verified',
      pending: 'Email verification is still pending.',
      notificationPrefs: 'Notification preferences',
      notificationBody: 'Choose how reminders, offers, and booking updates reach you.',
      savePreferences: 'Save preferences',
      event: 'Event',
      back: 'Back to dashboard',
      savedCompanies: 'Saved companies',
      notifications: 'Notifications',
      logout: 'Log out',
      renter: 'Renter',
      saveFailed: 'Could not save profile.',
      prefFailed: 'Could not save preferences.',
    },
    fr: {
      profile: 'Profil',
      loading: 'Chargement du profil…',
      loadFailed: 'Impossible de charger le profil.',
      yourProfile: 'Votre profil',
      firstName: 'Prénom',
      lastName: 'Nom',
      email: 'Email',
      phone: 'Téléphone',
      locale: 'Langue',
      currency: 'Devise',
      saving: 'Enregistrement…',
      saveProfile: 'Enregistrer le profil',
      verification: 'Vérification',
      verified: 'Email vérifié',
      pending: 'La vérification de l’email est encore en attente.',
      notificationPrefs: 'Préférences de notification',
      notificationBody: 'Choisissez comment les rappels, offres et mises à jour vous parviennent.',
      savePreferences: 'Enregistrer les préférences',
      event: 'Événement',
      back: 'Retour au dashboard',
      savedCompanies: 'Entreprises sauvegardées',
      notifications: 'Notifications',
      logout: 'Déconnexion',
      renter: 'Client',
      saveFailed: 'Impossible d’enregistrer le profil.',
      prefFailed: 'Impossible d’enregistrer les préférences.',
    },
    ar: {
      profile: 'الملف الشخصي',
      loading: 'جارٍ تحميل الملف الشخصي…',
      loadFailed: 'تعذر تحميل الملف الشخصي.',
      yourProfile: 'ملفك الشخصي',
      firstName: 'الاسم الأول',
      lastName: 'اسم العائلة',
      email: 'البريد الإلكتروني',
      phone: 'الهاتف',
      locale: 'اللغة',
      currency: 'العملة',
      saving: 'جارٍ الحفظ…',
      saveProfile: 'حفظ الملف الشخصي',
      verification: 'التحقق',
      verified: 'تم التحقق من البريد الإلكتروني',
      pending: 'التحقق من البريد الإلكتروني ما زال قيد الانتظار.',
      notificationPrefs: 'تفضيلات الإشعارات',
      notificationBody: 'اختر كيف تصلك التذكيرات والعروض وتحديثات الحجز.',
      savePreferences: 'حفظ التفضيلات',
      event: 'الحدث',
      back: 'العودة إلى اللوحة',
      savedCompanies: 'الشركات المحفوظة',
      notifications: 'الإشعارات',
      logout: 'تسجيل الخروج',
      renter: 'المستأجر',
      saveFailed: 'تعذر حفظ الملف الشخصي.',
      prefFailed: 'تعذر حفظ التفضيلات.',
    },
  }[language]
  const [profile, setProfile] = useState<RenterProfile | null>(null)
  const [preferences, setPreferences] = useState<Record<string, boolean>>({})
  const [status, setStatus] = useState<Status>('loading')
  const [errorMsg, setErrorMsg] = useState('')
  const [saving, setSaving] = useState(false)

  useEffect(() => {
    Promise.all([loadRenterProfile(), loadRenterPreferences()])
      .then(([profileData, preferenceData]) => {
        setProfile(profileData)
        setPreferences(
          Object.fromEntries(
            preferenceData.map((item) => [`${item.notificationType}:${item.channel}`, item.enabled]),
          ),
        )
        setStatus('ready')
      })
      .catch((err) => {
        if (err instanceof RenterAuthError) {
          router.replace('/')
          return
        }
        setErrorMsg(err instanceof Error ? err.message : dict.loadFailed)
        setStatus('error')
      })
  }, [router])

  if (status === 'loading') {
    return <div className="shell"><div className="card p-8 text-sm text-stone-500">{dict.loading}</div></div>
  }

  if (status === 'error') {
    return <div className="shell"><ErrorCard message={errorMsg} /></div>
  }

  return (
    <div className="shell space-y-6">
      <div className="card p-8">
        <h1 className="text-3xl font-black tracking-tight text-blue-900">{dict.yourProfile}</h1>
        <div className="mt-8 grid gap-6 sm:grid-cols-2 lg:grid-cols-3">
          <EditableField label={dict.firstName} value={profile?.firstName ?? ''} onChange={(value) => setProfile((current) => current ? { ...current, firstName: value } : current)} />
          <EditableField label={dict.lastName} value={profile?.lastName ?? ''} onChange={(value) => setProfile((current) => current ? { ...current, lastName: value } : current)} />
          <Field label={dict.email} value={profile?.email} />
          <EditableField label={dict.phone} value={profile?.phone ?? ''} onChange={(value) => setProfile((current) => current ? { ...current, phone: value } : current)} />
          <SelectField
            label={dict.locale}
            value={profile?.preferredLocale || 'en'}
            options={['en', 'fr', 'ar']}
            onChange={(value) => setProfile((current) => current ? { ...current, preferredLocale: value } : current)}
          />
          <SelectField
            label={dict.currency}
            value="MAD"
            options={['MAD']}
            onChange={() => {}}
          />
        </div>
        <div className="mt-8 flex justify-end">
          <button
            type="button"
            onClick={async () => {
              if (!profile) return
              setSaving(true)
              setErrorMsg('')
              try {
                const updated = await updateRenterProfile({
                  firstName: profile.firstName,
                  lastName: profile.lastName,
                  phone: profile.phone,
                  preferredLocale: profile.preferredLocale,
                  preferredCurrency: profile.preferredCurrency,
                })
                setProfile(updated)
              } catch (err) {
                setErrorMsg(err instanceof Error ? err.message : dict.saveFailed)
              } finally {
                setSaving(false)
              }
            }}
            className="rounded-full bg-orange-600 px-5 py-2 text-sm font-semibold text-white"
          >
            {saving ? dict.saving : dict.saveProfile}
          </button>
        </div>
        <div className="mt-8 rounded-2xl border border-stone-200 bg-stone-50 p-5">
          <p className="text-xs font-semibold uppercase tracking-[0.16em] text-stone-500">{dict.verification}</p>
          <p className="mt-2 text-sm text-stone-700">
            {profile?.emailVerified ? dict.verified : dict.pending}
          </p>
        </div>
      </div>

      <div className="card p-8">
        <div className="flex flex-wrap items-center justify-between gap-4">
          <div>
            <h2 className="text-2xl font-bold text-blue-900">{dict.notificationPrefs}</h2>
            <p className="mt-2 text-sm text-stone-600">{dict.notificationBody}</p>
          </div>
          <button
            type="button"
            onClick={async () => {
              setSaving(true)
              setErrorMsg('')
              try {
                const payload: RenterPreference[] = Object.entries(preferences).map(([key, enabled]) => {
                  const [notificationType, channel] = key.split(':')
                  return { notificationType, channel, enabled }
                })
                await updateRenterPreferences(payload)
              } catch (err) {
                setErrorMsg(err instanceof Error ? err.message : dict.prefFailed)
              } finally {
                setSaving(false)
              }
            }}
            className="rounded-full bg-orange-600 px-5 py-2 text-sm font-semibold text-white"
          >
            {saving ? dict.saving : dict.savePreferences}
          </button>
        </div>
        <div className="mt-6 overflow-x-auto">
          <table className="min-w-full text-sm">
            <thead className="bg-stone-50">
              <tr>
                <th className="px-4 py-3 text-left font-semibold text-stone-500">{dict.event}</th>
                {RENTER_CHANNELS.map((channel) => (
                  <th key={channel} className="px-4 py-3 text-center font-semibold text-stone-500">
                    {channel}
                  </th>
                ))}
              </tr>
            </thead>
            <tbody>
              {RENTER_EVENTS.map((eventName) => (
                <tr key={eventName} className="border-t border-stone-100">
                  <td className="px-4 py-3 font-medium text-blue-900">{eventName.replaceAll('_', ' ')}</td>
                  {RENTER_CHANNELS.map((channel) => (
                    <td key={`${eventName}-${channel}`} className="px-4 py-3 text-center">
                      <input
                        type="checkbox"
                        checked={preferences[`${eventName}:${channel}`] ?? true}
                        onChange={(event) =>
                          setPreferences((current) => ({
                            ...current,
                            [`${eventName}:${channel}`]: event.target.checked,
                          }))
                        }
                        className="h-4 w-4 rounded border-stone-300 text-orange-600"
                      />
                    </td>
                  ))}
                </tr>
              ))}
            </tbody>
          </table>
        </div>
      </div>
    </div>
  )
}

function Field({ label, value }: { label: string; value?: string | null }) {
  return (
    <div>
      <p className="text-xs font-semibold uppercase tracking-[0.16em] text-stone-400">{label}</p>
      <p className="mt-2 text-sm font-medium text-blue-900 break-all">{value}</p>
    </div>
  )
}

function EditableField({ label, value, onChange }: { label: string; value: string; onChange: (value: string) => void }) {
  return (
    <label className="block">
      <p className="text-xs font-semibold uppercase tracking-[0.16em] text-stone-400">{label}</p>
      <input
        value={value}
        onChange={(event) => onChange(event.target.value)}
        className="mt-2 w-full rounded-2xl border border-stone-200 bg-white px-4 py-3 text-sm font-medium text-blue-900"
      />
    </label>
  )
}

function SelectField({ label, value, options, onChange }: { label: string; value: string; options: string[]; onChange: (value: string) => void }) {
  return (
    <label className="block">
      <p className="text-xs font-semibold uppercase tracking-[0.16em] text-stone-400">{label}</p>
      <select
        value={value}
        onChange={(event) => onChange(event.target.value)}
        className="mt-2 w-full rounded-2xl border border-stone-200 bg-white px-4 py-3 text-sm font-medium text-blue-900"
      >
        {options.map((option) => (
          <option key={option} value={option}>
            {option}
          </option>
        ))}
      </select>
    </label>
  )
}

function ErrorCard({ message }: { message: string }) {
  return (
    <div className="card p-8 text-center">
      <p className="text-sm text-rose-600">{message}</p>
    </div>
  )
}