import React, { useEffect, useMemo, useState } from 'react';
import { INDICATOR_REGISTRY, type IndicatorDef } from '../utils/indicatorRegistry';
import { MAIN_INDICATOR_LABELS } from '../utils/indicatorMainTab';

interface IndicatorCustomTabEditorProps {
  mode: 'create' | 'edit';
  initialName: string;
  initialTypes: string[];
  onSave: (name: string, indicatorTypes: string[]) => void;
  onClose: () => void;
}

function indicatorLabel(def: IndicatorDef): { ko: string; en: string } {
  const main = MAIN_INDICATOR_LABELS[def.type];
  return main ?? { ko: def.description, en: def.name };
}

const IndicatorCustomTabEditor: React.FC<IndicatorCustomTabEditorProps> = ({
  mode,
  initialName,
  initialTypes,
  onSave,
  onClose,
}) => {
  const [name, setName] = useState(initialName);
  const [selected, setSelected] = useState<Set<string>>(() => new Set(initialTypes));
  const [search, setSearch] = useState('');

  useEffect(() => {
    const onKey = (e: KeyboardEvent) => {
      if (e.key === 'Escape') {
        e.stopImmediatePropagation();
        onClose();
      }
    };
    window.addEventListener('keydown', onKey, true);
    return () => window.removeEventListener('keydown', onKey, true);
  }, [onClose]);

  const filtered = useMemo(() => {
    const q = search.toLowerCase().trim();
    if (!q) return INDICATOR_REGISTRY;
    return INDICATOR_REGISTRY.filter(d => {
      const lbl = indicatorLabel(d);
      return (
        lbl.ko.toLowerCase().includes(q)
        || lbl.en.toLowerCase().includes(q)
        || d.shortName.toLowerCase().includes(q)
        || d.type.toLowerCase().includes(q)
      );
    });
  }, [search]);

  const toggle = (type: string) => {
    setSelected(prev => {
      const next = new Set(prev);
      if (next.has(type)) next.delete(type);
      else next.add(type);
      return next;
    });
  };

  const handleSave = () => {
    const trimmed = name.trim();
    if (!trimmed) {
      window.alert('탭 이름을 입력해 주세요.');
      return;
    }
    if (selected.size === 0) {
      window.alert('탭에 표시할 지표를 하나 이상 선택해 주세요.');
      return;
    }
    const ordered = INDICATOR_REGISTRY
      .filter(d => selected.has(d.type))
      .map(d => d.type);
    onSave(trimmed, ordered);
  };

  return (
    <div
      className="ind-tab-editor-overlay"
      onMouseDown={e => { if (e.target === e.currentTarget) onClose(); }}
    >
      <div className="ind-tab-editor" onMouseDown={e => e.stopPropagation()}>
        <div className="ind-tab-editor-header">
          <span className="ind-tab-editor-title">
            {mode === 'create' ? '탭 추가' : '탭 수정'}
          </span>
          <button type="button" className="gc-popup-close" onClick={onClose} aria-label="닫기">✕</button>
        </div>

        <div className="ind-tab-editor-body">
          <label className="ind-tab-editor-field">
            <span className="ind-tab-editor-label">탭 이름</span>
            <input
              className="ind-tab-editor-input"
              value={name}
              onChange={e => setName(e.target.value)}
              placeholder="예: 내 지표"
              autoFocus
            />
          </label>

          <div className="ind-tab-editor-field">
            <div className="ind-tab-editor-label-row">
              <span className="ind-tab-editor-label">
                지표 선택 ({selected.size}개)
              </span>
              <button
                type="button"
                className="ind-tab-editor-link"
                onClick={() => setSelected(new Set(INDICATOR_REGISTRY.map(d => d.type)))}
              >
                전체 선택
              </button>
              <button
                type="button"
                className="ind-tab-editor-link"
                onClick={() => setSelected(new Set())}
              >
                전체 해제
              </button>
            </div>
            <input
              className="ind-tab-editor-input"
              value={search}
              onChange={e => setSearch(e.target.value)}
              placeholder="지표 검색..."
            />
          </div>

          <div className="ind-tab-editor-list">
            {filtered.length === 0 ? (
              <div className="ind-panel-empty">검색 결과 없음</div>
            ) : (
              filtered.map(def => {
                const lbl = indicatorLabel(def);
                const checked = selected.has(def.type);
                return (
                  <label key={def.type} className={`ind-tab-editor-item${checked ? ' checked' : ''}`}>
                    <input
                      type="checkbox"
                      checked={checked}
                      onChange={() => toggle(def.type)}
                    />
                    <span className="ind-tab-editor-item-info">
                      <span className="ind-tab-editor-item-name">{lbl.ko}</span>
                      <span className="ind-tab-editor-item-desc">{lbl.en}</span>
                    </span>
                  </label>
                );
              })
            )}
          </div>
        </div>

        <div className="ind-tab-editor-footer">
          <button type="button" className="ind-tab-editor-btn cancel" onClick={onClose}>
            취소
          </button>
          <button type="button" className="ind-tab-editor-btn save" onClick={handleSave}>
            저장
          </button>
        </div>
      </div>
    </div>
  );
};

export default IndicatorCustomTabEditor;