import React, { useEffect, useRef, useState } from 'react';
import { useForm } from 'react-hook-form';
import { zodResolver } from '@hookform/resolvers/zod';
import { useCurrentUser } from '@/hooks/useCurrentUser';
import { useNostrPublish } from '@/hooks/useNostrPublish';
import { useToast } from '@/hooks/useToast';
import { Button } from '@/components/ui/button';
import { useCoordinator } from '@/hooks/useCoordinator';
import { coordinatorAddUrl, parseCoordinatorInput } from '@/lib/coordinator';
import {
  Form,
  FormControl,
  FormDescription,
  FormField,
  FormItem,
  FormLabel,
  FormMessage,
} from '@/components/ui/form';
import { Input } from '@/components/ui/input';
import { Textarea } from '@/components/ui/textarea';
import { Switch } from '@/components/ui/switch';
import { Label } from '@/components/ui/label';
import { Loader2, Upload, Zap, ShieldCheck, AlertCircle, Bitcoin, Award, MessageSquareLock, UserRound, Handshake, X, Plus, Bot, BadgeCheck, HelpCircle, Server, AtSign } from 'lucide-react';
import { NSchema as n, type NostrMetadata } from '@nostrify/nostrify';
import { useQueryClient } from '@tanstack/react-query';
import { useUploadFile } from '@/hooks/useUploadFile';
import { useCrewNip05 } from '@/hooks/useCrewNip05';
import { useProfileHandles, useSetProfileHandles } from '@/hooks/useProfileHandles';
import { Nip05HandlesEditor } from '@/components/Nip05HandlesEditor';
import { SkateNip05Input } from '@/components/SkateNip05Input';
import { SKATE_NIP05_DOMAIN, parseSkateNip05 } from '@/lib/skateNip05';
import { isValidNoffer, isValidSilentPayment, isValidLightningAddress } from '@/lib/types';
import { normalizeClinkCode } from '@/lib/clink';
import { useTranslation } from '@/contexts/language';

export const EditProfileForm: React.FC = () => {
  const queryClient = useQueryClient();

  const { user, metadata } = useCurrentUser();
  const { mutateAsync: publishEvent, isPending } = useNostrPublish();
  const { mutateAsync: uploadFile, isPending: isUploading } = useUploadFile();
  const { toast } = useToast();
  const { t } = useTranslation();

  // CLINK Offer (noffer1...) — a self-custodial Bitcoin tip code. Not part of
  // the standard NostrMetadata schema, so we keep it in its own state and merge
  // it into the kind 0 content JSON on save (preserved as a custom field).
  const [noffer, setNoffer] = useState('');
  const nofferTrimmed = noffer.trim();
  const nofferInvalid = nofferTrimmed.length > 0 && !isValidNoffer(nofferTrimmed);
  const nofferValid = isValidNoffer(nofferTrimmed);

  // Lightning address (LUD-16). Part of NostrMetadata but not in the default
  // form fields, so we manage it here and merge it on save.
  const [lud16, setLud16] = useState('');
  const lud16Trimmed = lud16.trim().replace(/^lightning:\/\//i, '').replace(/^lightning:/i, '');
  const lud16Invalid = lud16Trimmed.length > 0 && !isValidLightningAddress(lud16Trimmed);

  // Bitcoin Silent Payment address (BIP-352). Custom kind-0 field.
  const [silentPayment, setSilentPayment] = useState('');
  const spTrimmed = silentPayment.trim();
  const spInvalid = spTrimmed.length > 0 && !isValidSilentPayment(spTrimmed);
  const spValid = isValidSilentPayment(spTrimmed);

  // Badges — a label + optional link each, stored as a `badges` array in kind-0.
  // Used for sponsors/backers, and rendered as clickable chips on the profile.
  const [badgeList, setBadgeList] = useState<Array<{ label: string; url: string }>>([
    { label: '', url: '' },
  ]);

  // Cordn contact link — private (MLS-encrypted) group messaging you can own.
  // The coordinator others can use to message you on Cordn. Accepts the same
  // pointer formats as Settings → Coordinator (nprofile / cordn.net link /
  // npub / hex) as well as an http(s) URL — this is the discovery field.
  const [cordn, setCordn] = useState('');
  const [openToSponsorships, setOpenToSponsorships] = useState(false);
  const [sponsorNote, setSponsorNote] = useState('');

  // Extra personal NIP-05 handles — stored in a separate kind-30078 record so
  // another client re-saving the profile can't drop them.
  const { data: savedHandles } = useProfileHandles(user?.pubkey);
  const { setHandles } = useSetProfileHandles();
  const [extraHandles, setExtraHandles] = useState<string[]>([]);
  const handlesSeededRef = useRef(false);
  const cordnTrimmed = cordn.trim();
  const cordnParsed = cordnTrimmed ? parseCoordinatorInput(cordnTrimmed) : null;
  const cordnInvalid =
    cordnTrimmed.length > 0 && !cordnParsed && !/^https?:\/\/.+/i.test(cordnTrimmed);
  const { coordinator: myCoordinator } = useCoordinator();

  // Initialize the form with default values
  const form = useForm<NostrMetadata>({
    resolver: zodResolver(n.metadata()),
    defaultValues: {
      name: '',
      about: '',
      picture: '',
      banner: '',
      website: '',
      nip05: '',
      bot: false,
    },
  });

  // Update form values when user data is loaded
  useEffect(() => {
    if (metadata) {
      form.reset({
        name: metadata.name || '',
        about: metadata.about || '',
        picture: metadata.picture || '',
        banner: metadata.banner || '',
        website: metadata.website || '',
        nip05: metadata.nip05 || '',
        bot: metadata.bot || false,
      });
      // Prefill custom / extra fields from the raw metadata.
      const raw = metadata as Record<string, unknown>;
      if (typeof raw.noffer === 'string') setNoffer(raw.noffer);
      if (typeof metadata.lud16 === 'string') setLud16(metadata.lud16);
      if (typeof raw.bitcoin_silent_payment === 'string') setSilentPayment(raw.bitcoin_silent_payment);
      // Badges: prefer the structured array; fall back to legacy `sponsors` lines.
      const rawBadges = Array.isArray(raw.badges) ? raw.badges : null;
      if (rawBadges) {
        const rows = rawBadges
          .map((b) => (b && typeof b === 'object' ? (b as Record<string, unknown>) : {}))
          .map((b) => ({ label: String(b.label ?? ''), url: String(b.url ?? '') }))
          .filter((b) => b.label.trim());
        setBadgeList(rows.length ? rows : [{ label: '', url: '' }]);
      } else if (typeof raw.sponsors === 'string') {
        const lines = raw.sponsors.split('\n').map((s) => s.trim()).filter(Boolean);
        setBadgeList(
          lines.length ? lines.map((label) => ({ label, url: '' })) : [{ label: '', url: '' }],
        );
      }
      if (typeof raw.cordn === 'string') setCordn(raw.cordn);
      setOpenToSponsorships(raw.sponsorships_open === true);
      if (typeof raw.sponsorships_note === 'string') setSponsorNote(raw.sponsorships_note);
    }
  }, [metadata, form]);

  // Seed the extra handles once from the separate record.
  useEffect(() => {
    if (handlesSeededRef.current || !savedHandles) return;
    handlesSeededRef.current = true;
    setExtraHandles(savedHandles);
  }, [savedHandles]);

  // Handle file uploads for profile picture and banner
  const uploadPicture = async (file: File, field: 'picture' | 'banner') => {
    try {
      // The first tuple in the array contains the URL
      const [[_, url]] = await uploadFile(file);
      form.setValue(field, url);
      toast({
        title: t('settingsUi.editProfile.uploadSuccessTitle'),
        description: t('settingsUi.editProfile.uploadSuccessDesc', { field: field === 'picture' ? t('settingsUi.editProfile.profilePicture') : t('settingsUi.editProfile.bannerImage') }),
      });
    } catch (error) {
      console.error(`Failed to upload ${field}:`, error);
      toast({
        title: t('common.error'),
        description: t('settingsUi.editProfile.uploadErrorDesc', { field: field === 'picture' ? t('settingsUi.editProfile.profilePicture') : t('settingsUi.editProfile.bannerImage') }),
        variant: 'destructive',
      });
    }
  };

  const onSubmit = async (values: NostrMetadata) => {
    if (!user) {
      toast({
        title: t('common.error'),
        description: t('settingsUi.editProfile.mustBeLoggedIn'),
        variant: 'destructive',
      });
      return;
    }

    if (nofferInvalid) {
      toast({
        title: t('settingsUi.editProfile.invalidClinkTitle'),
        description: t('settingsUi.editProfile.invalidClinkDesc'),
        variant: 'destructive',
      });
      return;
    }

    if (lud16Invalid) {
      toast({
        title: t('settingsUi.editProfile.invalidLightningTitle'),
        description: t('settingsUi.editProfile.invalidLightningDesc'),
        variant: 'destructive',
      });
      return;
    }

    if (spInvalid) {
      toast({
        title: t('settingsUi.editProfile.invalidSpTitle'),
        description: t('settingsUi.editProfile.invalidSpDesc'),
        variant: 'destructive',
      });
      return;
    }

    if (cordnInvalid) {
      toast({
        title: t('settingsUi.editProfile.invalidCordnTitle'),
        description: t('settingsUi.editProfile.invalidCordnDesc'),
        variant: 'destructive',
      });
      return;
    }

    try {
      // Combine existing metadata with new values
      const data: Record<string, unknown> = { ...metadata, ...values };

      // Clean up empty values
      for (const key in data) {
        if (data[key] === '') {
          delete data[key];
        }
      }

      // Merge the custom CLINK offer code (or remove it when cleared).
      if (nofferValid) {
        data.noffer = normalizeClinkCode(nofferTrimmed);
      } else {
        delete data.noffer;
      }

      // Lightning address (LUD-16).
      if (lud16Trimmed) {
        data.lud16 = lud16Trimmed;
      } else {
        delete data.lud16;
      }

      // Bitcoin Silent Payment address (custom field).
      if (spValid) {
        data.bitcoin_silent_payment = spTrimmed;
      } else {
        delete data.bitcoin_silent_payment;
      }

      // Badges (custom field) — label + optional link, shown as chips on profile.
      const cleanBadges = badgeList
        .map((b) => ({ label: b.label.trim(), url: b.url.trim() }))
        .filter((b) => b.label)
        .map((b) => (b.url ? { label: b.label, url: b.url } : { label: b.label }));
      if (cleanBadges.length) {
        data.badges = cleanBadges;
      } else {
        delete data.badges;
      }
      // Retire the legacy field now that badges supersede it.
      delete data.sponsors;

      // Sponsorship opt-in (custom kind-0 fields). The profile only claims
      // this when the skater explicitly turned it on.
      if (openToSponsorships) {
        data.sponsorships_open = true;
        if (sponsorNote.trim()) data.sponsorships_note = sponsorNote.trim();
        else delete data.sponsorships_note;
      } else {
        delete data.sponsorships_open;
        delete data.sponsorships_note;
      }

      // Cordn contact link (custom field).
      if (cordnTrimmed) {
        // Normalise a bare pointer (nprofile/npub/hex) to Cordn's canonical
        // add-link, so the profile carries a human-clickable URL other clients
        // can parse back. A plain http(s) URL is stored as-is.
        data.cordn = cordnParsed ? coordinatorAddUrl(cordnParsed) : cordnTrimmed;
      } else {
        delete data.cordn;
      }

      // Publish the metadata event (kind 0) with retry logic
      let attempts = 0;
      let lastError;

      while (attempts < 3) {
        try {
          await publishEvent({
            kind: 0,
            content: JSON.stringify(data),
          });

          // Success! Break out of retry loop
          break;
        } catch (err) {
          lastError = err;
          attempts++;

          // Wait a bit before retrying
          if (attempts < 3) {
            await new Promise(resolve => setTimeout(resolve, 1000));
          }
        }
      }

      // If all attempts failed, throw the last error
      if (attempts === 3 && lastError) {
        throw lastError;
      }

      // Extra handles live in a separate record — only publish when changed.
      const before = [...(savedHandles ?? [])].sort().join(',');
      const after = [...extraHandles].sort().join(',');
      if (before !== after) {
        await setHandles(extraHandles);
      }

      // Invalidate queries to refresh the data
      queryClient.invalidateQueries({ queryKey: ['logins'] });
      queryClient.invalidateQueries({ queryKey: ['author', user.pubkey] });

      toast({
        title: t('settingsUi.editProfile.updateSuccessTitle'),
        description: t('settingsUi.editProfile.updateSuccessDesc'),
      });
    } catch (error) {
      console.error('Failed to update profile:', error);
      toast({
        title: t('common.error'),
        description: t('settingsUi.editProfile.updateErrorDesc'),
        variant: 'destructive',
      });
    }
  };

  const saving = isPending || isUploading;

  return (
    <Form {...form}>
      <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-8">

        {/* ── Section: Identity ── */}
        <FormSection
          icon={<UserRound className="h-4 w-4" />}
          title={t('settingsUi.editProfile.identityTitle')}
          description={t('settingsUi.editProfile.identityDesc')}
          accent="from-[#ff0040] to-[#ff6600]"
        >
          <FormField
            control={form.control}
            name="name"
            render={({ field }) => (
              <FormItem>
                <FormLabel>{t('settingsUi.editProfile.displayName')}</FormLabel>
                <FormControl>
                  <Input placeholder={t('settingsUi.editProfile.displayNamePlaceholder')} {...field} />
                </FormControl>
                <FormMessage />
              </FormItem>
            )}
          />

          <FormField
            control={form.control}
            name="about"
            render={({ field }) => (
              <FormItem>
                <FormLabel>{t('settingsUi.editProfile.bio')}</FormLabel>
                <FormControl>
                  <Textarea placeholder={t('settingsUi.editProfile.bioPlaceholder')} className="resize-none min-h-[88px]" {...field} />
                </FormControl>
                <FormMessage />
              </FormItem>
            )}
          />

          <div className="grid grid-cols-1 md:grid-cols-2 gap-5">
            <FormField
              control={form.control}
              name="picture"
              render={({ field }) => (
                <ImageUploadField
                  field={field}
                  label={t('settingsUi.editProfile.profilePicture')}
                  placeholder="https://…/avatar.jpg"
                  description={t('settingsUi.editProfile.pictureDesc')}
                  previewType="square"
                  onUpload={(file) => uploadPicture(file, 'picture')}
                />
              )}
            />
            <FormField
              control={form.control}
              name="banner"
              render={({ field }) => (
                <ImageUploadField
                  field={field}
                  label={t('settingsUi.editProfile.bannerImage')}
                  placeholder="https://…/banner.jpg"
                  description={t('settingsUi.editProfile.bannerDesc')}
                  previewType="wide"
                  onUpload={(file) => uploadPicture(file, 'banner')}
                />
              )}
            />
          </div>

          <FormField
            control={form.control}
            name="website"
            render={({ field }) => (
              <FormItem>
                <FormLabel>{t('settingsUi.editProfile.website')}</FormLabel>
                <FormControl>
                  <Input placeholder="https://yourwebsite.com" {...field} />
                </FormControl>
                <FormMessage />
              </FormItem>
            )}
          />

          {/* Sponsorship opt-in — explicit consent, never inferred from activity. */}
          <div className="space-y-3 rounded-xl border border-pink-500/20 bg-pink-500/[0.04] p-3">
            <div className="flex items-center justify-between gap-3">
              <div className="min-w-0">
                <Label htmlFor="profile-open-sponsorships" className="flex items-center gap-2 text-sm font-semibold">
                  <Handshake className="h-4 w-4 text-pink-400" />
                  {t('settingsUi.editProfile.openToSponsorships')}
                </Label>
                <p className="mt-1 text-xs text-muted-foreground">
                  {t('settingsUi.editProfile.openToSponsorshipsHint')}
                </p>
              </div>
              <Switch
                id="profile-open-sponsorships"
                checked={openToSponsorships}
                onCheckedChange={setOpenToSponsorships}
              />
            </div>
            {openToSponsorships && (
              <div className="space-y-1.5">
                <Label htmlFor="profile-sponsor-note" className="text-xs font-bold uppercase tracking-wide text-pink-300">
                  {t('settingsUi.editProfile.sponsorNote')}
                </Label>
                <Textarea
                  id="profile-sponsor-note"
                  value={sponsorNote}
                  onChange={(event) => setSponsorNote(event.target.value)}
                  placeholder={t('settingsUi.editProfile.sponsorNotePlaceholder')}
                  maxLength={180}
                  rows={2}
                />
              </div>
            )}
          </div>

          {/* NIP-05 — the verified-handle field. Given real prominence + live
              verification feedback so people know if it's actually working. */}
          <FormField
            control={form.control}
            name="nip05"
            render={({ field }) => <Nip05Field value={field.value ?? ''} onChange={field.onChange} pubkey={user?.pubkey} />}
          />

          {/* Extra handles — a skater can be known on several domains. Each is
              verified against this same key; stored in a separate record. */}
          <div className="space-y-2 pt-1">
            <Label className="flex items-center gap-2 text-sm font-semibold">
              <AtSign className="h-4 w-4 text-teal-400" />
              {t('settingsUi.editProfile.extraHandles')}
              <span className="text-xs font-normal text-muted-foreground">{t('settingsUi.editProfile.extraHandlesHint')}</span>
            </Label>
            <Nip05HandlesEditor
              handles={extraHandles}
              onChange={setExtraHandles}
              pubkey={user?.pubkey}
              inputId="profile-extra-nip05"
            />
          </div>
        </FormSection>

        {/* ── Section: Bitcoin & Payments ── */}
        <FormSection
          icon={<Bitcoin className="h-4 w-4" />}
          title={t('settingsUi.editProfile.bitcoinTitle')}
          description={t('settingsUi.editProfile.bitcoinDesc')}
          accent="from-amber-500 to-orange-500"
        >
          {/* Lightning address */}
          <FieldRow
            id="profile-lud16"
            icon={<Zap className="h-4 w-4" />}
            iconClass="text-yellow-500 bg-yellow-500/10"
            label={t('settingsUi.editProfile.lightningAddress')}
            value={lud16}
            onChange={setLud16}
            placeholder="you@yourdomain.com"
            inputMode="email"
            status={
              lud16Invalid
                ? { kind: 'error', text: t('settingsUi.editProfile.lud16Invalid') }
                : lud16Trimmed
                  ? { kind: 'ok', text: t('settingsUi.editProfile.lud16Ok') }
                  : { kind: 'hint', text: t('settingsUi.editProfile.lud16Hint') }
            }
          />

          {/* Silent Payment address */}
          <FieldRow
            id="profile-sp"
            icon={<Bitcoin className="h-4 w-4" />}
            iconClass="text-orange-500 bg-orange-500/10"
            label={t('settingsUi.editProfile.silentPaymentAddress')}
            value={silentPayment}
            onChange={setSilentPayment}
            placeholder="sp1q…"
            status={
              spInvalid
                ? { kind: 'error', text: t('settingsUi.editProfile.spInvalid') }
                : spValid
                  ? { kind: 'ok', text: t('settingsUi.editProfile.spOk') }
                  : { kind: 'hint', text: t('settingsUi.editProfile.spHint') }
            }
          />

          {/* CLINK tip code */}
          <FieldRow
            id="profile-noffer"
            icon={<Zap className="h-4 w-4" />}
            iconClass="text-indigo-500 bg-indigo-500/10"
            label={t('settingsUi.editProfile.clinkTipCode')}
            value={noffer}
            onChange={setNoffer}
            placeholder="noffer1…"
            status={
              nofferInvalid
                ? { kind: 'error', text: t('settingsUi.editProfile.nofferInvalid') }
                : nofferValid
                  ? { kind: 'ok', text: t('settingsUi.editProfile.nofferOk') }
                  : { kind: 'hint', text: t('settingsUi.editProfile.nofferHint') }
            }
          />
        </FormSection>

        {/* ── Section: Skate profile ── */}
        <FormSection
          icon={<Award className="h-4 w-4" />}
          title={t('settingsUi.editProfile.skateProfileTitle')}
          description={t('settingsUi.editProfile.skateProfileDesc')}
          accent="from-pink-500 to-fuchsia-500"
        >
          {/* Badges — sponsor/backer chips, each with an optional link */}
          <div className="space-y-2.5">
            <Label className="flex items-center gap-2 text-sm font-semibold">
              <Award className="h-4 w-4 text-pink-500" />
              {t('settingsUi.editProfile.badges')}
              <span className="text-xs font-normal text-muted-foreground">{t('settingsUi.editProfile.badgesHint')}</span>
            </Label>
            <div className="space-y-2">
              {badgeList.map((row, i) => (
                <div key={i} className="flex items-center gap-2">
                  <span className="text-pink-500/60 text-sm font-black w-4 text-center flex-shrink-0">•</span>
                  <Input
                    value={row.label}
                    placeholder={i === 0 ? t('settingsUi.editProfile.badgeExample') : t('settingsUi.editProfile.badgeLabelPlaceholder')}
                    onChange={(e) => {
                      const next = [...badgeList];
                      next[i] = { ...next[i], label: e.target.value };
                      setBadgeList(next);
                    }}
                    className="flex-1"
                  />
                  <Input
                    value={row.url}
                    placeholder={t('settingsUi.editProfile.badgeUrlPlaceholder')}
                    onChange={(e) => {
                      const next = [...badgeList];
                      next[i] = { ...next[i], url: e.target.value };
                      setBadgeList(next);
                    }}
                    className="flex-1"
                    spellCheck={false}
                  />
                  <Button
                    type="button"
                    variant="ghost"
                    size="icon"
                    className="h-9 w-9 flex-shrink-0 text-muted-foreground hover:text-red-500"
                    onClick={() => {
                      const next = badgeList.filter((_, idx) => idx !== i);
                      setBadgeList(next.length ? next : [{ label: '', url: '' }]);
                    }}
                    aria-label={t('settingsUi.editProfile.removeBadge')}
                    disabled={badgeList.length === 1 && !row.label && !row.url}
                  >
                    <X className="h-4 w-4" />
                  </Button>
                </div>
              ))}
            </div>
            <Button
              type="button"
              variant="outline"
              size="sm"
              className="gap-1.5 border-pink-500/40 text-pink-600 dark:text-pink-400 hover:bg-pink-500/10"
              onClick={() => setBadgeList([...badgeList, { label: '', url: '' }])}
            >
              <Plus className="h-3.5 w-3.5" />
              {t('settingsUi.editProfile.addBadge')}
            </Button>
            <p className="text-xs text-muted-foreground">
              {t('settingsUi.editProfile.badgesDescBefore')}{' '}
              <span className="text-[#ccff00]">@skate-spots.org</span> {t('settingsUi.editProfile.badgesDescAfter')}
            </p>
          </div>

          {/* Cordn coordinator — the pointer others discover you by. */}
          <FieldRow
            id="profile-cordn"
            icon={<MessageSquareLock className="h-4 w-4" />}
            iconClass="text-teal-500 bg-teal-500/10"
            label={t('settingsUi.editProfile.coordinator')}
            value={cordn}
            onChange={setCordn}
            placeholder="nprofile1…  ·  cordn.net/chat/coordinators?c=…  ·  https://…"
            status={
              cordnInvalid
                ? { kind: 'error', text: t('settingsUi.editProfile.cordnInvalid') }
                : cordnTrimmed
                  ? { kind: 'ok', text: t('settingsUi.editProfile.cordnOk') }
                  : { kind: 'hint', text: t('settingsUi.editProfile.cordnHint') }
            }
          />
          {myCoordinator && (
            <Button
              type="button"
              variant="outline"
              size="sm"
              className="border-teal-500/40 text-teal-600 hover:bg-teal-500/10 dark:text-teal-400"
              onClick={() => setCordn(coordinatorAddUrl(myCoordinator))}
            >
              <Server className="mr-1.5 h-3.5 w-3.5" />
              {t('settingsUi.editProfile.useMyCoordinator')}
            </Button>
          )}
        </FormSection>

        {/* ── Section: Account ── */}
        <FormSection
          icon={<Bot className="h-4 w-4" />}
          title={t('settingsUi.editProfile.accountTitle')}
          description={t('settingsUi.editProfile.accountDesc')}
          accent="from-slate-500 to-gray-500"
        >
          <FormField
            control={form.control}
            name="bot"
            render={({ field }) => (
              <FormItem className="flex flex-row items-center justify-between rounded-xl border p-4 bg-muted/20">
                <div className="space-y-0.5">
                  <FormLabel className="text-base">{t('settingsUi.editProfile.botAccount')}</FormLabel>
                  <FormDescription>{t('settingsUi.editProfile.botAccountDesc')}</FormDescription>
                </div>
                <FormControl>
                  <Switch checked={field.value} onCheckedChange={field.onChange} />
                </FormControl>
              </FormItem>
            )}
          />
        </FormSection>

        {/* ── Sticky save bar ── */}
        <div className="sticky bottom-0 -mx-1 px-1 py-3 bg-gradient-to-t from-background via-background to-transparent">
          <Button type="submit" className="w-full h-11 font-bold" disabled={saving}>
            {saving ? (
              <><Loader2 className="mr-2 h-4 w-4 animate-spin" />{t('settingsUi.editProfile.saving')}</>
            ) : (
              t('settingsUi.editProfile.saveProfile')
            )}
          </Button>
        </div>
      </form>
    </Form>
  );
};

/** A titled, visually-grouped section of the profile form. */
const FormSection: React.FC<{
  icon: React.ReactNode;
  title: string;
  description?: string;
  accent: string; // tailwind gradient stops, e.g. "from-x to-y"
  children: React.ReactNode;
}> = ({ icon, title, description, accent, children }) => (
  <section className="rounded-2xl border bg-card/40 overflow-hidden">
    <div className="flex items-center gap-3 px-4 sm:px-5 py-4 border-b bg-muted/30">
      <div className={`flex-shrink-0 h-9 w-9 rounded-xl bg-gradient-to-br ${accent} text-white flex items-center justify-center shadow-sm`}>
        {icon}
      </div>
      <div className="min-w-0">
        <h3 className="text-base font-bold leading-tight">{title}</h3>
        {description && <p className="text-xs text-muted-foreground mt-0.5">{description}</p>}
      </div>
    </div>
    <div className="p-4 sm:p-5 space-y-5">{children}</div>
  </section>
);

/** A single labeled input row with an icon and inline validation status. */
const FieldRow: React.FC<{
  id: string;
  icon: React.ReactNode;
  iconClass: string;
  label: string;
  value: string;
  onChange: (v: string) => void;
  placeholder: string;
  status: { kind: 'hint' | 'ok' | 'error'; text: string };
  inputMode?: React.HTMLAttributes<HTMLInputElement>['inputMode'];
}> = ({ id, icon, iconClass, label, value, onChange, placeholder, status, inputMode }) => (
  <div className="space-y-2">
    <Label htmlFor={id} className="flex items-center gap-2 text-sm font-semibold">
      <span className={`h-6 w-6 rounded-lg flex items-center justify-center ${iconClass}`}>{icon}</span>
      {label}
    </Label>
    <Input
      id={id}
      placeholder={placeholder}
      value={value}
      onChange={(e) => onChange(e.target.value)}
      spellCheck={false}
      autoCapitalize="none"
      inputMode={inputMode}
      className="font-mono text-sm"
    />
    {status.kind === 'error' ? (
      <p className="flex items-start gap-1.5 text-xs text-red-500">
        <AlertCircle className="h-3.5 w-3.5 shrink-0 mt-px" />
        {status.text}
      </p>
    ) : status.kind === 'ok' ? (
      <p className="flex items-start gap-1.5 text-xs text-green-600 dark:text-green-400">
        <ShieldCheck className="h-3.5 w-3.5 shrink-0 mt-px" />
        {status.text}
      </p>
    ) : (
      <p className="text-xs text-muted-foreground">{status.text}</p>
    )}
  </div>
);

/**
 * The NIP-05 identifier field — a verified, human-readable handle
 * (`you@yourdomain.com`) that proves you control both the Nostr key and the
 * domain. This is the closest thing Nostr has to a "verified" checkmark, so it
 * gets a prominent, self-explaining row with LIVE verification feedback that
 * checks the handle actually resolves back to the logged-in key.
 */
const Nip05Field: React.FC<{
  value: string;
  onChange: (v: string) => void;
  pubkey: string | undefined;
}> = ({ value, onChange, pubkey }) => {
  const { t } = useTranslation();
  const trimmed = value.trim().toLowerCase();
  const looksValid = /^[a-z0-9._-]+@[a-z0-9.-]+\.[a-z]{2,}$/.test(trimmed);

  // Only hit the network once it's a plausible address.
  const { data: result, isLoading } = useCrewNip05(looksValid ? trimmed : undefined, pubkey);

  // Free SkateSpots handles (`name@skate-spots.org`). A local draft the skater
  // can claim; on success it fills the field above and verifies normally.
  const skateHandle = parseSkateNip05(value);
  const [draft, setDraft] = useState('');
  useEffect(() => {
    if (skateHandle) setDraft(skateHandle);
  }, [skateHandle]);

  let status: { kind: 'hint' | 'ok' | 'error' | 'warn' | 'checking'; text: string };
  if (!trimmed) {
    status = { kind: 'hint', text: t('settingsUi.editProfile.nip05HintEmpty') };
  } else if (!looksValid) {
    status = { kind: 'error', text: t('settingsUi.editProfile.nip05Invalid') };
  } else if (isLoading) {
    status = { kind: 'checking', text: t('settingsUi.editProfile.nip05Checking') };
  } else if (result?.status === 'verified') {
    status = { kind: 'ok', text: t('settingsUi.editProfile.nip05Verified') };
  } else if (result?.status === 'mismatch') {
    status = { kind: 'error', text: t('settingsUi.editProfile.nip05Mismatch') };
  } else if (result?.status === 'unreachable') {
    status = { kind: 'warn', text: t('settingsUi.editProfile.nip05Unreachable') };
  } else {
    status = { kind: 'hint', text: t('settingsUi.editProfile.nip05Enter') };
  }

  return (
    <div className="space-y-2 rounded-xl border bg-muted/20 p-4">
      <Label htmlFor="profile-nip05" className="flex items-center gap-2 text-sm font-semibold">
        <span className="h-6 w-6 rounded-lg flex items-center justify-center text-[#00a3ff] bg-[#00a3ff]/10">
          <BadgeCheck className="h-4 w-4" />
        </span>
        {t('settingsUi.editProfile.nip05VerifiedHandle')}
        <a
          href="https://nostr.how/en/guides/get-verified"
          target="_blank"
          rel="noopener noreferrer"
          className="ml-auto inline-flex items-center gap-1 text-xs font-normal text-muted-foreground hover:text-foreground"
        >
          <HelpCircle className="h-3.5 w-3.5" />
          {t('settingsUi.editProfile.nip05How')}
        </a>
      </Label>
      <div className="relative">
        <Input
          id="profile-nip05"
          placeholder="you@yourdomain.com"
          value={value}
          onChange={(e) => onChange(e.target.value)}
          spellCheck={false}
          autoCapitalize="none"
          className="font-mono text-sm pr-9"
        />
        {looksValid && (
          <span className="absolute right-3 top-1/2 -translate-y-1/2">
            {isLoading ? (
              <Loader2 className="h-4 w-4 animate-spin text-muted-foreground" />
            ) : result?.status === 'verified' ? (
              <BadgeCheck className="h-4 w-4 text-green-500" />
            ) : result?.status === 'mismatch' ? (
              <AlertCircle className="h-4 w-4 text-red-500" />
            ) : null}
          </span>
        )}
      </div>
      {status.kind === 'error' ? (
        <p className="flex items-start gap-1.5 text-xs text-red-500">
          <AlertCircle className="h-3.5 w-3.5 shrink-0 mt-px" />
          {status.text}
        </p>
      ) : status.kind === 'ok' ? (
        <p className="flex items-start gap-1.5 text-xs text-green-600 dark:text-green-400">
          <BadgeCheck className="h-3.5 w-3.5 shrink-0 mt-px" />
          {status.text}
        </p>
      ) : status.kind === 'warn' ? (
        <p className="flex items-start gap-1.5 text-xs text-amber-600 dark:text-amber-400">
          <AlertCircle className="h-3.5 w-3.5 shrink-0 mt-px" />
          {status.text}
        </p>
      ) : status.kind === 'checking' ? (
        <p className="flex items-start gap-1.5 text-xs text-muted-foreground">
          <Loader2 className="h-3.5 w-3.5 shrink-0 mt-px animate-spin" />
          {status.text}
        </p>
      ) : (
        <p className="text-xs text-muted-foreground">{status.text}</p>
      )}

      {/* Free SkateSpots handles — claim one here and it fills the field above. */}
      <div className="space-y-2 rounded-lg border border-dashed border-muted-foreground/25 p-3">
        <p className="text-xs text-muted-foreground">
          {t('settingsUi.editProfile.freeHandleBefore')}{' '}
          <span className="font-semibold text-foreground">@{SKATE_NIP05_DOMAIN}</span> {t('settingsUi.editProfile.freeHandleAfter')}
        </p>
        <SkateNip05Input
          id="skate-nip05-claim"
          handle={draft}
          onHandleChange={(h) => {
            setDraft(h);
            if (skateHandle) onChange('');
          }}
          claimed={value}
          onClaimed={(nip05) => onChange(nip05)}
        />
      </div>
    </div>
  );
};

// Reusable component for image upload fields
interface ImageUploadFieldProps {
  field: {
    value: string | undefined;
    onChange: (value: string) => void;
    name: string;
    onBlur: () => void;
  };
  label: string;
  placeholder: string;
  description: string;
  previewType: 'square' | 'wide';
  onUpload: (file: File) => void;
}

const ImageUploadField: React.FC<ImageUploadFieldProps> = ({
  field,
  label,
  placeholder,
  description,
  previewType,
  onUpload,
}) => {
  const fileInputRef = useRef<HTMLInputElement>(null);
  const { t } = useTranslation();

  return (
    <FormItem>
      <FormLabel>{label}</FormLabel>
      <div className="flex items-start gap-3">
        {/* Preview thumbnail — click to upload */}
        <button
          type="button"
          onClick={() => fileInputRef.current?.click()}
          className={`group relative flex-shrink-0 overflow-hidden border-2 border-dashed border-muted-foreground/25 hover:border-primary/50 transition-colors bg-muted/30 flex items-center justify-center ${
            previewType === 'square' ? 'h-16 w-16 rounded-full' : 'h-16 w-28 rounded-lg'
          }`}
          aria-label={t('settingsUi.editProfile.uploadLabel', { label })}
        >
          {field.value ? (
            <>
              <img src={field.value} alt={t('settingsUi.editProfile.previewLabel', { label })} className="h-full w-full object-cover" />
              <span className="absolute inset-0 bg-black/50 opacity-0 group-hover:opacity-100 transition-opacity flex items-center justify-center">
                <Upload className="h-4 w-4 text-white" />
              </span>
            </>
          ) : (
            <Upload className="h-5 w-5 text-muted-foreground/50 group-hover:text-primary/60 transition-colors" />
          )}
        </button>

        <div className="flex-1 min-w-0 space-y-1.5">
          <input
            type="file"
            ref={fileInputRef}
            accept="image/*"
            className="hidden"
            onChange={(e) => {
              const file = e.target.files?.[0];
              if (file) onUpload(file);
            }}
          />
          <FormControl>
            <Input
              placeholder={placeholder}
              name={field.name}
              value={field.value ?? ''}
              onChange={e => field.onChange(e.target.value)}
              onBlur={field.onBlur}
              className="text-sm"
            />
          </FormControl>
          <FormDescription className="text-xs">{description}</FormDescription>
        </div>
      </div>
      <FormMessage />
    </FormItem>
  );
};