import React from 'react';
import { Activity, MousePointer, CircleDot, GitCommit, Magnet, ArrowRight, Trash2, Table, Layers, Scan, Sliders } from 'lucide-react';
import { type EditMode, type SimulationResult } from './types';
import { type InpNode } from './inpModel';
import { type BottomPanelTab } from './BottomPanel';

export interface ToolRailProps {
  appMode: 'explore' | 'edit' | 'result';
  setAppMode: React.Dispatch<React.SetStateAction<'explore' | 'edit' | 'result'>>;
  editMode: EditMode;
  setEditMode: React.Dispatch<React.SetStateAction<EditMode>>;
  setNodeCreationType: React.Dispatch<React.SetStateAction<InpNode['type']>>;
  isNodeTypeMenuOpen: boolean;
  setIsNodeTypeMenuOpen: React.Dispatch<React.SetStateAction<boolean>>;
  boxSelectionEnabled: boolean;
  setBoxSelectionEnabled: React.Dispatch<React.SetStateAction<boolean>>;
  snapEnabled: boolean;
  setSnapEnabled: React.Dispatch<React.SetStateAction<boolean>>;
  showFlowArrows: boolean;
  setShowFlowArrows: React.Dispatch<React.SetStateAction<boolean>>;
  isLayerPanelOpen: boolean;
  setIsLayerPanelOpen: React.Dispatch<React.SetStateAction<boolean>>;
  layerPanelWidth: number;
  isStyleSettingsOpen: boolean;
  setIsStyleSettingsOpen: React.Dispatch<React.SetStateAction<boolean>>;
  bottomPanelTab: BottomPanelTab | null;
  toggleBottomPanel: (tab: BottomPanelTab) => void;
  selectionCounts: { nodes: number; links: number; gisFeatures: number; total: number };
  handleDeleteSelected: () => void;
  wasmResult: SimulationResult | null;
}

/** Left 44px tool rail: selection/edit tools, snapping, layer/table/style toggles (DESIGN.md § 3.1). */
export const ToolRail: React.FC<ToolRailProps> = ({
  appMode,
  setAppMode,
  editMode,
  setEditMode,
  setNodeCreationType,
  isNodeTypeMenuOpen,
  setIsNodeTypeMenuOpen,
  boxSelectionEnabled,
  setBoxSelectionEnabled,
  snapEnabled,
  setSnapEnabled,
  showFlowArrows,
  setShowFlowArrows,
  isLayerPanelOpen,
  setIsLayerPanelOpen,
  layerPanelWidth,
  isStyleSettingsOpen,
  setIsStyleSettingsOpen,
  bottomPanelTab,
  toggleBottomPanel,
  selectionCounts,
  handleDeleteSelected,
  wasmResult,
}) => (
  <aside className="tool-rail" title="도구 레일 (단축키: 1 탐색 / 2 편집 / 3 결과)">
    <button
      onClick={() => {
        setIsLayerPanelOpen((v) => {
          const next = !v;
          localStorage.setItem('gispipe_layer_panel_open', String(next));
          return next;
        });
      }}
      className={`tool-btn ${isLayerPanelOpen ? 'active' : ''}`}
      title="레이어 패널 토글 (단축키 [)"
    >
      <Layers size={16} />
    </button>
  
    <div className="tool-divider" />
  
    <button
      onClick={() => {
        setEditMode('select');
        setIsNodeTypeMenuOpen(false);
        setBoxSelectionEnabled(false);
      }}
      className={`tool-btn ${editMode === 'select' && !boxSelectionEnabled ? 'active' : ''}`}
      title="선택 / 이동 (단축키 V)"
    >
      <MousePointer size={16} />
    </button>
    <button
      onClick={() => {
        setEditMode('select');
        setIsNodeTypeMenuOpen(false);
        setBoxSelectionEnabled((enabled) => !enabled);
      }}
      className={`tool-btn ${boxSelectionEnabled ? 'active' : ''}`}
      title="박스 선택: 좌→우 완전 포함, 우→좌 교차 선택"
    >
      <Scan size={16} />
    </button>
    <div className="tool-menu-anchor">
      <button
        onClick={() => setIsNodeTypeMenuOpen((open) => !open)}
        className={`tool-btn ${appMode === 'edit' && editMode === 'add-node' ? 'active' : ''}`}
        title="지도에 시설 추가"
        aria-haspopup="menu"
        aria-expanded={isNodeTypeMenuOpen}
      >
        <CircleDot size={16} />
      </button>
      {isNodeTypeMenuOpen && (
        <div
          className="tool-flyout"
          role="menu"
          aria-label="추가할 시설 선택"
          style={{ left: isLayerPanelOpen ? 40 + layerPanelWidth : 40 }}
        >
          <div className="tool-flyout-title">추가할 시설</div>
          {([
            ['JUNCTION', '절점', 'Junction'],
            ['RESERVOIR', '저수지', 'Reservoir'],
            ['TANK', '탱크', 'Tank'],
          ] as const).map(([type, label, sublabel]) => (
            <button
              key={type}
              type="button"
              role="menuitem"
              className="tool-flyout-item"
              onClick={() => {
                setNodeCreationType(type);
                setIsNodeTypeMenuOpen(false);
                if (appMode !== 'edit') setAppMode('edit');
                setEditMode('add-node');
                setBoxSelectionEnabled(false);
              }}
            >
              <CircleDot size={14} aria-hidden="true" />
              <span>{label}</span>
              <small>{sublabel}</small>
            </button>
          ))}
        </div>
      )}
    </div>
    <button
      onClick={() => {
        if (appMode !== 'edit') setAppMode('edit');
        setEditMode('add-pipe');
        setIsNodeTypeMenuOpen(false);
        setBoxSelectionEnabled(false);
      }}
      className={`tool-btn ${appMode === 'edit' && editMode === 'add-pipe' ? 'active' : ''}`}
      title="관로 연결 (단축키 P)"
    >
      <GitCommit size={16} />
    </button>
    <button
      onClick={() => setSnapEnabled((v) => !v)}
      className={`tool-btn ${snapEnabled ? 'active' : ''}`}
      title={`절점 자동 스냅 (${snapEnabled ? '켜짐' : '꺼짐'})`}
    >
      <Magnet size={16} />
    </button>
    <button
      onClick={() => setShowFlowArrows((v) => !v)}
      className={`tool-btn ${showFlowArrows ? 'active' : ''}`}
      title={`유향 화살표 (${showFlowArrows ? '켜짐' : '꺼짐'})`}
    >
      <ArrowRight size={16} />
    </button>
    <button
      onClick={() => setIsStyleSettingsOpen((v) => !v)}
      className={`tool-btn ${isStyleSettingsOpen ? 'active' : ''}`}
      title="지도 스타일 설정 (절점/관로 크기·투명도, 배경지도 투명도)"
    >
      <Sliders size={16} />
    </button>
    <button
      onClick={() => toggleBottomPanel('table')}
      className={`tool-btn ${bottomPanelTab === 'table' ? 'active' : ''}`}
      title="요소 테이블 열기/닫기 (Ctrl+T)"
    >
      <Table size={16} />
    </button>
    {wasmResult?.timeSteps && wasmResult.timeSteps.length > 1 && (
      <button
        onClick={() => toggleBottomPanel('eps')}
        className={`tool-btn ${bottomPanelTab === 'eps' ? 'active' : ''}`}
        title="EPS 시간 컨트롤러 열기/닫기"
      >
        <Activity size={16} />
      </button>
    )}
  
  
    <div className="tool-divider" />
  
  
    {selectionCounts.total > 0 && (
      <button
        onClick={handleDeleteSelected}
        className="tool-btn"
        style={{ color: 'var(--crit)' }}
        title={`선택 요소 ${selectionCounts.total}개 삭제 (Delete 키)`}
      >
        <Trash2 size={16} />
      </button>
    )}
  </aside>
);