'use client';
import React from 'react';
import { Download, CreditCard, Eye } from 'lucide-react';
import { useMutation } from '@tanstack/react-query';
import { useSiHistory } from '../../lib/hooks/useSiHistory';
import { formatDate } from '@/widgets/history/lib/utils';
import { apiRequest } from '@/shared/request/apiRequest';
import { links } from '@/shared/request/links';
import { toast } from 'react-toastify';
import type { SiDocument } from '../../lib/types';
import { SiButton } from '@/features/modals/siModal/page';
import { useRouter, useParams } from 'next/navigation';

// ─── State badge ───────────────────────────────────────────────────────────────

const StateBadge: React.FC<{ state: 'paid' | 'unpaid' }> = ({ state }) => {
  const isPaid = state === 'paid';
  return (
    <span
      className={[
        'inline-flex items-center gap-1.5 px-2.5 py-1 rounded-lg text-xs font-semibold whitespace-nowrap select-none',
        isPaid ? 'bg-emerald-50 text-emerald-700' : 'bg-rose-50 text-rose-600',
      ].join(' ')}
    >
      <span
        className={[
          'w-1.5 h-1.5 rounded-full shrink-0',
          isPaid ? 'bg-emerald-500' : 'bg-rose-500',
        ].join(' ')}
      />
      {isPaid ? "To'langan" : "To'lanmagan"}
    </span>
  );
};

// ─── SI% badge ─────────────────────────────────────────────────────────────────

const SiPercentBadge: React.FC<{ value: number }> = ({ value }) => {
  const cls =
    value < 20
      ? 'text-emerald-700 bg-emerald-50'
      : value < 40
        ? 'text-amber-700 bg-amber-50'
        : 'text-red-700 bg-red-50';
  return (
    <span
      className={`inline-block px-2 py-0.5 rounded-md text-xs font-semibold ${cls}`}
    >
      {value}%
    </span>
  );
};

// ─── Skeleton ──────────────────────────────────────────────────────────────────

const SkeletonRow = () => (
  <tr>
    {Array.from({ length: 7 }).map((_, i) => (
      <td key={i} className="px-5 py-3.5">
        <div
          className="h-4 bg-slate-100 rounded animate-pulse"
          style={{ width: i === 1 ? 120 : 60 }}
        />
      </td>
    ))}
  </tr>
);

// ─── Empty / Error states ──────────────────────────────────────────────────────

const EmptyState = () => (
  <tr>
    <td colSpan={7} className="px-5 py-12 text-center text-slate-400 text-sm">
      Hozircha SI tekshiruvlar yo&apos;q
    </td>
  </tr>
);

const ErrorState = () => (
  <tr>
    <td colSpan={7} className="px-5 py-12 text-center text-red-400 text-sm">
      Ma&apos;lumotlarni yuklashda xatolik yuz berdi
    </td>
  </tr>
);

// ─── Row ───────────────────────────────────────────────────────────────────────

const SiRow: React.FC<{ item: SiDocument; index: number }> = ({
  item,
  index,
}) => {
  const router = useRouter();
  const { locale } = useParams() as { locale: string };

  const pay = useMutation({
    mutationKey: ['si-payment', item.id],
    mutationFn: () =>
      apiRequest<{ payment_link: string }>('POST', links.demo_pay(item.id)),
    onSuccess: (res) => {
      window.open(res.data.payment_link, '_self');
    },
    onError: (err) => {
      toast.error(err instanceof Error ? err.message : 'Xatolik yuz berdi');
    },
  });

  return (
    <tr className="hover:bg-slate-50/60 transition-colors">
      {/* # */}
      <td className="px-5 py-3.5 text-slate-400 font-mono text-xs">
        {String(index).padStart(2, '0')}
      </td>

      {/* Sarlavha */}
      <td className="px-5 py-3.5">
        <span className="text-slate-800 font-medium max-w-45 truncate block text-sm">
          {item.title || '—'}
        </span>
      </td>

      {/* Fayl */}
      <td className="px-5 py-3.5">
        {item.file ? (
          <a
            href={item.file}
            target="_blank"
            rel="noopener noreferrer"
            className="inline-flex items-center gap-1.5 text-slate-500 hover:text-blue-600 transition-colors"
          >
            <Download size={14} />
            <span className="text-xs font-medium">Fayl</span>
          </a>
        ) : (
          <span className="text-slate-200 text-xs">—</span>
        )}
      </td>

      {/* So'z */}
      <td className="px-5 py-3.5 text-slate-500 tabular-nums text-sm">
        {item.total_words > 0 ? item.total_words.toLocaleString() : '—'}
      </td>

      {/* SI% */}
      <td className="px-5 py-3.5">
        {item.si_percantage != null && item.result != null ? (
          <SiPercentBadge value={item.si_percantage} />
        ) : (
          <span className="text-slate-300 text-xs">—</span>
        )}
      </td>

      {/* Sana */}
      <td className="px-5 py-3.5 text-slate-500 text-sm whitespace-nowrap">
        {formatDate(item.created_at)}
      </td>

      {/* Holat */}
      <td className="px-5 py-3.5">
        <StateBadge state={item.state} />
      </td>

      {/* Amal */}
      <td className="px-5 py-3.5 text-right">
        {item.state === 'unpaid' ? (
          <button
            onClick={() => pay.mutate()}
            disabled={pay.isPending}
            className="inline-flex items-center gap-1.5 px-3 py-1.5 rounded-lg text-xs font-medium text-white bg-violet-600 hover:bg-violet-700 active:scale-95 transition-all duration-150 disabled:opacity-60"
          >
            <CreditCard size={11} />
            {pay.isPending ? '...' : "To'lash"}
          </button>
        ) : (
          <button
            onClick={() => router.push(`/${locale}/si/${item.id}`)}
            className="inline-flex items-center gap-1.5 px-3 py-1.5 rounded-lg text-xs font-medium text-blue-600 bg-blue-50 hover:bg-blue-100 active:scale-95 transition-all duration-150"
          >
            <Eye size={11} />
            Ko&apos;rish
          </button>
        )}
      </td>
    </tr>
  );
};

// ─── SiTable ───────────────────────────────────────────────────────────────────

export const SiTable: React.FC = () => {
  const { items, isLoading, isError } = useSiHistory();

  return (
    <div className="space-y-4">
      <div className="flex items-center justify-between">
        <div>
          <h2 className="text-xl font-bold text-slate-900">SI detektor</h2>
          <p className="text-sm text-slate-500 mt-0.5">
            {isLoading ? '...' : `${items.length} ta tekshiruv`}
          </p>
        </div>
        <SiButton />
      </div>

      <div className="bg-white rounded-2xl border border-slate-100 shadow-sm overflow-hidden">
        <div className="overflow-x-auto">
          <table className="w-full text-sm">
            <thead>
              <tr className="bg-slate-50 border-b border-slate-100">
                {[
                  '#',
                  'Sarlavha',
                  'Fayl',
                  "So'z",
                  'SI%',
                  'Sana',
                  'Holat',
                  'Amal',
                ].map((h) => (
                  <th
                    key={h}
                    className="text-left px-5 py-3 text-[11px] font-semibold text-slate-400 uppercase tracking-wider whitespace-nowrap last:text-right"
                  >
                    {h}
                  </th>
                ))}
              </tr>
            </thead>
            <tbody className="divide-y divide-slate-50">
              {isLoading &&
                Array.from({ length: 5 }).map((_, i) => (
                  <SkeletonRow key={i} />
                ))}
              {isError && <ErrorState />}
              {!isLoading && !isError && items.length === 0 && <EmptyState />}
              {!isLoading &&
                !isError &&
                items.map((item, i) => (
                  <SiRow key={item.id} item={item} index={i + 1} />
                ))}
            </tbody>
          </table>
        </div>
      </div>
    </div>
  );
};