import React from 'react'
import { Link } from 'react-router-dom'
import { ArrowLeftIcon, ClockIcon } from 'lucide-react'
import { PageHero } from '../components/PageHero'
import { Reveal } from '../components/Reveal'
import { ArticleCard } from '../components/ArticleCard'
import { Newsletter } from '../components/home/Newsletter'
import { useSite } from '../api'
import { useLang } from '../i18n/lang'
import { EditableItem } from '../admin/Editable'
import { useAdmin } from '../admin/AdminContext'
import { formatJalali, formatEnDate } from '../utils/date'
import { toPersianDigits } from '../utils/digits'
import { PlusIcon } from 'lucide-react'

function DraftBadge({ className = '' }: { className?: string }) {
  const { t } = useLang()
  return (
    <span
      className={`border border-amber-400/60 bg-ink/90 px-2 py-1 text-xs font-bold text-amber-300 ${className}`}
    >
      {t('draft')}
    </span>
  )
}

/** میان‌بر ویرایش پیش‌نویس برای هر کارمند واردشده — creator هم بدون حالت ویرایش ادمین */
function DraftEditLink({ id, className = '' }: { id: number; className?: string }) {
  const { lang } = useLang()
  const { syncEditLang } = useAdmin()
  return (
    <Link
      to={`/admin/write/${id}`}
      onClick={() => {
        // ویرایشگر با زبان همین صفحه باز شود — کلیک از وبلاگ انگلیسی نباید
        // مقاله را در حالت فارسی باز کند (و «دیدن در سایت» را به وبلاگ فارسی ببرد)
        syncEditLang(lang)
        localStorage.setItem(`aramesh_write_lang_${id}`, lang)
      }}
      className={`border border-copper/60 bg-ink/90 px-2.5 py-1 text-xs font-bold text-copper backdrop-blur transition-colors duration-200 hover:bg-copper hover:text-char ${className}`}
    >
      {lang === 'en' ? 'Edit draft' : 'ویرایش پیش‌نویس'}
    </Link>
  )
}

export function Blog() {
  const { articles } = useSite()
  const { t, href, lang } = useLang()
  const { isEditMode, isAuthenticated } = useAdmin()

  // دکمه «نوشتن مقاله جدید» فقط در حالت ویرایش ادمین دیده می‌شود
  const writeButton = isEditMode ? (
    <Link
      to="/admin/write"
      data-admin-link
      className="inline-flex items-center gap-2 bg-copper px-6 py-3 text-sm font-bold text-char transition-transform duration-200 hover:scale-105"
    >
      <PlusIcon className="h-4 w-4" />
      {t('writeNewArticle')}
    </Link>
  ) : null

  // حالت خالی — وبلاگ بدون مقاله نباید کرش کند
  if (articles.length === 0) {
    return (
      <>
        <PageHero pageKey="blog" />
        <section className="bg-char py-24 lg:py-32" aria-label={t('articlesAria')}>
          <div className="mx-auto max-w-site px-6 text-center lg:px-10">
            <h2 className="text-3xl font-bold text-ivory">{t('blogEmpty')}</h2>
            <p className="mt-4 text-sm font-light text-ivory/60">
              {t('blogEmptyText')}
            </p>
            <div className="mt-8 flex justify-center">{writeButton}</div>
          </div>
        </section>
        <Newsletter />
      </>
    )
  }

  const [featured, ...rest] = articles

  return (
    <>
      <PageHero pageKey="blog" />

      <section className="bg-char py-24 lg:py-32" aria-label={t('articlesAria')}>
        <div className="mx-auto max-w-site px-6 lg:px-10">
          <div className="mb-10 flex justify-start">{writeButton}</div>
          <Reveal>
            <EditableItem resource="articles" item={featured} editHref={`/admin/write/${featured.id}`}>
            <div className="relative">
            <Link
              to={href(`/blog/${encodeURIComponent(lang === 'en' && featured.slug_en ? featured.slug_en : featured.slug)}`)}
              className="group grid items-stretch border border-ivory/10 bg-char transition-[transform,box-shadow,border-color] duration-300 ease-lux hover:-translate-y-2 hover:border-copper/50 hover:shadow-lift lg:grid-cols-2"
              aria-label={`${t('readArticlePrefix')} ${featured.title}`}
            >
              <div className="overflow-hidden">
                <img
                  src={featured.image}
                  alt={`${t('articleImagePrefix')} ${featured.title}`}
                  className="h-full min-h-[20rem] w-full object-cover transition-transform duration-500 ease-lux group-hover:scale-105" fetchPriority="high" decoding="async"
                />
              </div>
              <div className="flex flex-col justify-center p-8 lg:p-12">
                <p className="text-xs font-light text-copper">
                  {t('featuredArticle')} — {featured.category}
                  {featured.status === 'draft' && (
                    <DraftBadge className="inline-block align-middle ltr:ml-3 rtl:mr-3" />
                  )}
                </p>
                <h2 className="mt-6 text-2xl font-bold leading-[2.2] md:leading-[2.2] text-ivory transition-colors duration-200 ease-lux group-hover:text-copper md:text-3xl">
                  {featured.title}
                </h2>
                <p className="mt-6 text-sm font-light leading-10 text-ivory/65">{featured.excerpt}</p>
                <div className="mt-10 flex items-center justify-between border-t border-ivory/10 pt-8 text-xs font-light text-ivory/50">
                  <span className="flex items-center gap-4">
                    <span>{lang === 'en' ? formatEnDate(featured.date) : formatJalali(featured.date)}</span>
                    <span className="flex items-center gap-1.5">
                      <ClockIcon className="h-3.5 w-3.5" />
                      {lang === 'en' ? featured.read : toPersianDigits(featured.read)}
                    </span>
                  </span>
                  <span className="flex items-center gap-2 text-copper">
                    {t('readMore')}
                    <ArrowLeftIcon className="h-3.5 w-3.5 ltr:-scale-x-100 transition-transform duration-200 ease-lux rtl:group-hover:-translate-x-1 ltr:group-hover:translate-x-1" />
                  </span>
                </div>
              </div>
            </Link>
            {isAuthenticated && featured.status === 'draft' && (
              <DraftEditLink id={featured.id} className="absolute top-4 z-10 ltr:right-4 rtl:left-4" />
            )}
            </div>
            </EditableItem>
          </Reveal>

          <div className="mt-12 grid gap-6 lg:grid-cols-3">
            {rest.map((article, i) => (
              <Reveal key={article.id} delay={0.05 * i} className="h-full">
                <EditableItem resource="articles" item={article} className="h-full" editHref={`/admin/write/${article.id}`}>
                  <div className="relative h-full">
                    {article.status === 'draft' && (
                      <DraftBadge className="absolute top-3 ltr:left-3 rtl:right-3 z-10" />
                    )}
                    {isAuthenticated && article.status === 'draft' && (
                      <DraftEditLink id={article.id} className="absolute top-3 z-20 ltr:right-3 rtl:left-3" />
                    )}
                    <ArticleCard article={article} />
                  </div>
                </EditableItem>
              </Reveal>
            ))}
          </div>
        </div>
      </section>

      <Newsletter />
    </>
  )
}