/**
 * 文件预览组件
 * 显示文档内容和评查点高亮
 */
import { useState, useEffect, useRef } from 'react';

// 定义评查点类型
interface ReviewPoint {
  id: string;
  title: string;
  status: string;
  content: string;
  suggestion: string;
  position?: {
    section: string;
    index: number;
  };
}

// 定义文档内容类型
interface FileContent {
  title: string;
  contractNumber: string;
  parties: {
    partyA: {
      name: string;
      address: string;
      representative: string;
      phone: string;
    };
    partyB: {
      name: string;
      address: string;
      representative: string;
      phone: string;
    };
  };
  sections: {
    title: string;
    content: string;
  }[];
}

interface FilePreviewProps {
  fileContent: FileContent;
  reviewPoints: ReviewPoint[];
  activeReviewPointId: string | null;
}

export function FilePreview({ fileContent, reviewPoints, activeReviewPointId }: FilePreviewProps) {
  const [zoomLevel, setZoomLevel] = useState(100);
  const [highlightsVisible, setHighlightsVisible] = useState(true);
  const contentRef = useRef<HTMLDivElement>(null);
  
  // 放大文档
  const handleZoomIn = () => {
    if (zoomLevel < 200) {
      setZoomLevel(prevZoom => prevZoom + 10);
    }
  };
  
  // 缩小文档
  const handleZoomOut = () => {
    if (zoomLevel > 50) {
      setZoomLevel(prevZoom => prevZoom - 10);
    }
  };
  
  // 切换高亮显示
  const toggleHighlights = () => {
    setHighlightsVisible(!highlightsVisible);
  };
  
  // 当选中的评查点变化时，滚动到对应位置
  useEffect(() => {
    if (activeReviewPointId && contentRef.current) {
      const highlightElement = contentRef.current.querySelector(`[data-review-id="${activeReviewPointId}"]`);
      if (highlightElement) {
        highlightElement.scrollIntoView({ behavior: 'smooth', block: 'center' });
        
        // 添加临时突出显示效果
        highlightElement.classList.add('highlight-focus');
        setTimeout(() => {
          highlightElement.classList.remove('highlight-focus');
        }, 1500);
      }
    }
  }, [activeReviewPointId]);
  
  // 获取评查点对应的样式类
  const getHighlightClass = (status: string) => {
    switch (status) {
      case 'warning':
        return 'warning';
      case 'error':
        return 'error';
      case 'success':
        return 'success';
      default:
        return 'warning';
    }
  };
  
  // 渲染文档内容
  const renderDocumentContent = () => {
    return (
      <div className="word-document" ref={contentRef} style={{transform: `scale(${zoomLevel/100})`, transformOrigin: 'center top'}}>
        <h1>{fileContent.title}</h1>
        <p style={{textAlign: 'right'}}>合同编号：{fileContent.contractNumber}</p>
        
        <div style={{margin: '20px 0'}}>
          <p><strong>甲方（供方）：</strong>{fileContent.parties.partyA.name}</p>
          <p>地址：{fileContent.parties.partyA.address}</p>
          <p>法定代表人：{fileContent.parties.partyA.representative}</p>
          <p>联系电话：{fileContent.parties.partyA.phone}</p>
          <p>&nbsp;</p>
          <p><strong>乙方（需方）：</strong>{fileContent.parties.partyB.name}</p>
          <p>地址：{fileContent.parties.partyB.address}</p>
          <p>法定代表人：{fileContent.parties.partyB.representative}</p>
          <p>联系电话：{fileContent.parties.partyB.phone}</p>
        </div>
        
        <p>根据《中华人民共和国合同法》及有关法律法规的规定，经双方协商一致，签订本合同，共同遵守。</p>
        
        {fileContent.sections.map((section, sectionIndex) => (
          <div key={sectionIndex}>
            <h2>{section.title}</h2>
            {renderSectionContent(section.content, section.title, sectionIndex)}
          </div>
        ))}
      </div>
    );
  };
  
  // 渲染章节内容，处理高亮
  const renderSectionContent = (content: string, sectionTitle: string, sectionIndex: number) => {
    const lines = content.split('\n');
    
    return lines.map((line, lineIndex) => {
      // 查找该行对应的评查点
      const reviewPoint = reviewPoints.find(point => 
        point.position && 
        point.position.section === sectionTitle && 
        point.position.index === lineIndex
      );
      
      if (reviewPoint && highlightsVisible) {
        // 如果有对应的评查点，添加高亮
        const isActive = reviewPoint.id === activeReviewPointId;
        return (
          <div 
            key={`${sectionIndex}-${lineIndex}`}
            className={`highlight-area ${getHighlightClass(reviewPoint.status)} ${isActive ? 'highlight-focus' : ''}`}
            data-review-id={reviewPoint.id}
            style={isActive ? {zIndex: 20, boxShadow: '0 0 0 2px yellow, 0 0 10px rgba(0,0,0,0.3)'} : {}}
          >
            <p>{line}</p>
          </div>
        );
      } else {
        // 没有评查点，正常显示
        return <p key={`${sectionIndex}-${lineIndex}`}>{line}</p>;
      }
    });
  };
  
  return (
    <div className="file-preview">
      <div className="file-preview-header py-2 px-4">
        <div className="flex items-center">
          <i className="ri-file-text-line text-primary mr-2"></i>
          <span className="font-medium text-primary">文件预览</span>
        </div>
        <div className="file-preview-actions">
          <button 
            className="ant-btn ant-btn-sm ant-btn-default py-0 px-1 text-xs h-5 leading-5"
            onClick={handleZoomIn}
          >
            <i className="ri-zoom-in-line"></i>
          </button>
          <button 
            className="ant-btn ant-btn-sm ant-btn-default py-0 px-1 text-xs h-5 leading-5"
            onClick={handleZoomOut}
          >
            <i className="ri-zoom-out-line"></i>
          </button>
          <button 
            className="ant-btn ant-btn-sm ant-btn-default py-0 px-1 text-xs h-5 leading-5"
            onClick={toggleHighlights}
          >
            <i className="ri-mark-pen-line"></i> {highlightsVisible ? '隐藏问题' : '显示问题'}
          </button>
        </div>
      </div>
      <div className="file-preview-content">
        {renderDocumentContent()}
      </div>
    </div>
  );
}