import { useState, useEffect, useMemo } from 'react';
import { fetchOrganizations } from '@tabs/assets/services/assetsApi';
import type { AssetOrgCompat } from '@tabs/assets/services/assetsApi';
import { typeTagCls } from '@tabs/assets/components/assetTypes';

const PAGE_SIZE = 20;

const regionShort = (j: string) =>
  j.includes('남해')
    ? '남해청'
    : j.includes('서해')
      ? '서해청'
      : j.includes('중부')
        ? '중부청'
        : j.includes('동해')
          ? '동해청'
          : j.includes('제주')
            ? '제주청'
            : j;

function VesselMaterialsPanel() {
  const [organizations, setOrganizations] = useState<AssetOrgCompat[]>([]);
  const [loading, setLoading] = useState(true);
  const [searchTerm, setSearchTerm] = useState('');
  const [regionFilter, setRegionFilter] = useState('전체');
  const [typeFilter, setTypeFilter] = useState('전체');
  const [currentPage, setCurrentPage] = useState(1);

  const load = () => {
    setLoading(true);
    fetchOrganizations()
      .then(setOrganizations)
      .catch((err) => console.error('[VesselMaterialsPanel] 데이터 로드 실패:', err))
      .finally(() => setLoading(false));
  };

  useEffect(() => {
    let cancelled = false;
    fetchOrganizations()
      .then((data) => {
        if (!cancelled) setOrganizations(data);
      })
      .catch((err) => console.error('[VesselMaterialsPanel] 데이터 로드 실패:', err))
      .finally(() => {
        if (!cancelled) setLoading(false);
      });
    return () => {
      cancelled = true;
    };
  }, []);

  const typeOptions = useMemo(() => {
    const set = new Set(organizations.map((o) => o.type));
    return Array.from(set).sort();
  }, [organizations]);

  const filtered = useMemo(
    () =>
      organizations
        .filter((o) => o.vessel > 0)
        .filter((o) => regionFilter === '전체' || o.jurisdiction.includes(regionFilter))
        .filter((o) => typeFilter === '전체' || o.type === typeFilter)
        .filter(
          (o) => !searchTerm || o.name.includes(searchTerm) || o.address.includes(searchTerm),
        ),
    [organizations, regionFilter, typeFilter, searchTerm],
  );

  const totalPages = Math.max(1, Math.ceil(filtered.length / PAGE_SIZE));
  const safePage = Math.min(currentPage, totalPages);
  const paged = filtered.slice((safePage - 1) * PAGE_SIZE, safePage * PAGE_SIZE);

  const handleFilterChange =
    (setter: (v: string) => void) => (e: React.ChangeEvent<HTMLSelectElement>) => {
      setter(e.target.value);
      setCurrentPage(1);
    };

  const pageNumbers = (() => {
    const range: number[] = [];
    const start = Math.max(1, safePage - 2);
    const end = Math.min(totalPages, safePage + 2);
    for (let i = start; i <= end; i++) range.push(i);
    return range;
  })();

  return (
    <div className="flex flex-col h-full">
      {/* 헤더 */}
      <div className="flex items-center justify-between px-6 py-4 border-b border-stroke">
        <div>
          <h1 className="text-lg font-bold text-fg font-korean">방제선 보유자재 현황</h1>
          <p className="text-xs text-fg-disabled mt-1 font-korean">
            총 {filtered.length}개 기관 (방제선 보유)
          </p>
        </div>
        <div className="flex items-center gap-3">
          <select
            value={regionFilter}
            onChange={handleFilterChange(setRegionFilter)}
            className="px-3 py-2 text-xs bg-bg-elevated border border-stroke rounded-md text-fg focus:border-color-accent focus:outline-none font-korean"
          >
            <option value="전체">전체 관할청</option>
            <option value="남해">남해청</option>
            <option value="서해">서해청</option>
            <option value="중부">중부청</option>
            <option value="동해">동해청</option>
            <option value="제주">제주청</option>
          </select>
          <select
            value={typeFilter}
            onChange={handleFilterChange(setTypeFilter)}
            className="px-3 py-2 text-xs bg-bg-elevated border border-stroke rounded-md text-fg focus:border-color-accent focus:outline-none font-korean"
          >
            <option value="전체">전체 유형</option>
            {typeOptions.map((t) => (
              <option key={t} value={t}>
                {t}
              </option>
            ))}
          </select>
          <input
            type="text"
            placeholder="기관명, 주소 검색..."
            value={searchTerm}
            onChange={(e) => {
              setSearchTerm(e.target.value);
              setCurrentPage(1);
            }}
            className="w-56 px-3 py-2 text-xs bg-bg-elevated border border-stroke rounded-md text-fg placeholder-fg-disabled focus:border-color-accent focus:outline-none font-korean"
          />
          <button
            onClick={load}
            className="px-4 py-2 text-xs font-semibold rounded-md bg-bg-elevated border border-stroke text-fg-sub hover:border-color-accent hover:text-color-accent transition-all font-korean"
          >
            새로고침
          </button>
        </div>
      </div>

      {/* 테이블 */}
      <div className="flex-1 overflow-auto">
        {loading ? (
          <div className="flex items-center justify-center h-32 text-fg-disabled text-sm font-korean">
            불러오는 중...
          </div>
        ) : (
          <table className="w-full">
            <thead>
              <tr className="border-b border-stroke bg-bg-surface">
                <th className="px-4 py-3 text-left text-label-2 font-semibold text-fg-disabled font-korean w-10 whitespace-nowrap">
                  번호
                </th>
                <th className="px-4 py-3 text-left text-label-2 font-semibold text-fg-disabled font-korean">
                  유형
                </th>
                <th className="px-4 py-3 text-left text-label-2 font-semibold text-fg-disabled font-korean">
                  관할청
                </th>
                <th className="px-4 py-3 text-left text-label-2 font-semibold text-fg-disabled font-korean">
                  기관명
                </th>
                <th className="px-4 py-3 text-left text-label-2 font-semibold text-fg-disabled font-korean">
                  주소
                </th>
                <th className="px-4 py-3 text-center text-label-2 font-semibold font-korean text-color-accent bg-[rgba(6,182,212,0.05)]">
                  방제선
                </th>
                <th className="px-4 py-3 text-center text-label-2 font-semibold font-korean text-fg-disabled">
                  유회수기
                </th>
                <th className="px-4 py-3 text-center text-label-2 font-semibold font-korean text-fg-disabled">
                  이송펌프
                </th>
                <th className="px-4 py-3 text-center text-label-2 font-semibold font-korean text-fg-disabled">
                  방제차량
                </th>
                <th className="px-4 py-3 text-center text-label-2 font-semibold font-korean text-fg-disabled">
                  살포장치
                </th>
                <th className="px-4 py-3 text-center text-label-2 font-semibold text-fg-disabled font-korean">
                  총자산
                </th>
              </tr>
            </thead>
            <tbody>
              {paged.length === 0 ? (
                <tr>
                  <td
                    colSpan={11}
                    className="px-6 py-10 text-center text-xs text-fg-disabled font-korean"
                  >
                    조회된 기관이 없습니다.
                  </td>
                </tr>
              ) : (
                paged.map((org, idx) => (
                  <tr
                    key={org.id}
                    className="border-b border-stroke hover:bg-[rgba(255,255,255,0.02)] transition-colors"
                  >
                    <td className="px-4 py-3 text-label-2 text-fg-disabled font-mono text-center">
                      {(safePage - 1) * PAGE_SIZE + idx + 1}
                    </td>
                    <td className="px-4 py-3">
                      <span
                        className={`text-caption px-1.5 py-0.5 rounded font-bold font-korean ${typeTagCls(org.type)}`}
                      >
                        {org.type}
                      </span>
                    </td>
                    <td className="px-4 py-3 text-label-2 text-fg-sub font-korean">
                      {regionShort(org.jurisdiction)}
                    </td>
                    <td className="px-4 py-3 text-label-2 text-fg font-korean font-semibold">
                      {org.name}
                    </td>
                    <td className="px-4 py-3 text-label-2 text-fg-disabled font-korean max-w-[200px] truncate">
                      {org.address}
                    </td>
                    <td className="px-4 py-3 text-label-2 font-mono text-center text-color-accent font-semibold bg-[rgba(6,182,212,0.05)]">
                      {org.vessel > 0 ? org.vessel : <span className="text-fg-disabled">—</span>}
                    </td>
                    <td className="px-4 py-3 text-label-2 font-mono text-center text-fg-sub">
                      {org.skimmer > 0 ? org.skimmer : <span className="text-fg-disabled">—</span>}
                    </td>
                    <td className="px-4 py-3 text-label-2 font-mono text-center text-fg-sub">
                      {org.pump > 0 ? org.pump : <span className="text-fg-disabled">—</span>}
                    </td>
                    <td className="px-4 py-3 text-label-2 font-mono text-center text-fg-sub">
                      {org.vehicle > 0 ? org.vehicle : <span className="text-fg-disabled">—</span>}
                    </td>
                    <td className="px-4 py-3 text-label-2 font-mono text-center text-fg-sub">
                      {org.sprayer > 0 ? org.sprayer : <span className="text-fg-disabled">—</span>}
                    </td>
                    <td className="px-4 py-3 text-label-2 font-mono text-center font-bold text-color-accent">
                      {org.totalAssets.toLocaleString()}
                    </td>
                  </tr>
                ))
              )}
            </tbody>
          </table>
        )}
      </div>

      {/* 합계 */}
      {!loading && filtered.length > 0 && (
        <div className="flex items-center gap-4 px-6 py-2 border-t border-stroke bg-bg-base/80">
          <span className="text-caption text-fg-disabled font-korean font-semibold mr-auto">
            합계 ({filtered.length}개 기관)
          </span>
          {[
            {
              label: '방제선',
              value: filtered.reduce((s, o) => s + o.vessel, 0),
              unit: '척',
              active: true,
            },
            {
              label: '유회수기',
              value: filtered.reduce((s, o) => s + o.skimmer, 0),
              unit: '대',
              active: false,
            },
            {
              label: '이송펌프',
              value: filtered.reduce((s, o) => s + o.pump, 0),
              unit: '대',
              active: false,
            },
            {
              label: '방제차량',
              value: filtered.reduce((s, o) => s + o.vehicle, 0),
              unit: '대',
              active: false,
            },
            {
              label: '살포장치',
              value: filtered.reduce((s, o) => s + o.sprayer, 0),
              unit: '대',
              active: false,
            },
            {
              label: '총자산',
              value: filtered.reduce((s, o) => s + o.totalAssets, 0),
              unit: '',
              active: true,
            },
          ].map((t) => (
            <div
              key={t.label}
              className={`flex items-center gap-1 px-1.5 py-0.5 rounded ${t.active ? 'bg-[rgba(6,182,212,0.1)]' : ''}`}
            >
              <span
                className={`text-caption font-korean ${t.active ? 'text-color-accent' : 'text-fg-disabled'}`}
              >
                {t.label}
              </span>
              <span
                className={`text-caption font-mono font-bold ${t.active ? 'text-color-accent' : 'text-fg'}`}
              >
                {t.value.toLocaleString()}
                {t.unit}
              </span>
            </div>
          ))}
        </div>
      )}

      {/* 페이지네이션 */}
      {!loading && filtered.length > 0 && (
        <div className="flex items-center justify-between px-6 py-3 border-t border-stroke">
          <span className="text-label-2 text-fg-disabled font-korean">
            {(safePage - 1) * PAGE_SIZE + 1}–{Math.min(safePage * PAGE_SIZE, filtered.length)} /
            전체 {filtered.length}개
          </span>
          <div className="flex items-center gap-1">
            <button
              onClick={() => setCurrentPage((p) => Math.max(1, p - 1))}
              disabled={safePage === 1}
              className="px-2.5 py-1 text-label-2 border border-stroke rounded text-fg-sub hover:border-color-accent hover:text-color-accent disabled:opacity-40 transition-colors"
            >
              &lt;
            </button>
            {pageNumbers.map((p) => (
              <button
                key={p}
                onClick={() => setCurrentPage(p)}
                className="px-2.5 py-1 text-label-2 border rounded transition-colors"
                style={
                  p === safePage
                    ? {
                        borderColor: 'var(--color-accent)',
                        color: 'var(--color-accent)',
                        background: 'rgba(6,182,212,0.1)',
                      }
                    : { borderColor: 'var(--border)', color: 'var(--text-2)' }
                }
              >
                {p}
              </button>
            ))}
            <button
              onClick={() => setCurrentPage((p) => Math.min(totalPages, p + 1))}
              disabled={safePage === totalPages}
              className="px-2.5 py-1 text-label-2 border border-stroke rounded text-fg-sub hover:border-color-accent hover:text-color-accent disabled:opacity-40 transition-colors"
            >
              &gt;
            </button>
          </div>
        </div>
      )}
    </div>
  );
}

export default VesselMaterialsPanel;
