'use client';

import { useEffect, useRef, useState, useCallback } from 'react';
import ControlPanel from './ControlPanel';

declare global {
  interface Window {
    IflowEngine: any;
  }
}

const DEFAULT_MODEL_URL = 'https://lyz-1259524260.cos.ap-guangzhou.myqcloud.com/iflow/models/8634e556-a94e-4ba7-be3e-2ea1507cced5/';

export default function BimViewer() {
  const containerRef = useRef<HTMLDivElement>(null);
  const engineRef = useRef<any>(null);
  const [engineStatus, setEngineStatus] = useState<string>('未初始化');
  const [isLoading, setIsLoading] = useState(false);

  const updateStatus = useCallback((status: string) => {
    setEngineStatus(status);
  }, []);

  useEffect(() => {
    if (!containerRef.current || typeof window === 'undefined') return;

    if (!window.IflowEngine) {
      console.error('SDK not found');
      updateStatus('SDK 未加载');
      return;
    }

    const Engine = window.IflowEngine.BimEngine;
    const engine = new Engine(containerRef.current, { locale: 'zh-CN' });
    engineRef.current = engine;

    engine.rightKey.registerHandler((event: any) => {
      const { x, y } = event;
      return [
        {
          id: 'home',
          label: 'toolbar.home',
          icon: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M3 9l9-7 9 7v11a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2z"></path><polyline points="9 22 9 12 15 12 15 22"></polyline></svg>',
          onClick: () => {
            console.log('Go Home');
          }
        },
        {
          id: 'log-pos',
          label: '打印坐标',
          icon: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="10"></circle><line x1="12" y1="16" x2="12" y2="12"></line><line x1="12" y1="8" x2="12.01" y2="8"></line></svg>',
          onClick: () => {
            console.log(`Clicked at: ${x}, ${y}`);
          }
        }
      ];
    });

    return () => {
      if (engineRef.current) {
        engineRef.current.destroy();
        engineRef.current = null;
      }
    };
  }, [updateStatus]);

  const initEngine = useCallback(() => {
    const engine = engineRef.current;
    if (!engine || !engine.engine) {
      alert('引擎未创建，请先等待页面加载完成');
      return;
    }

    if (engine.engine.isInitialized()) {
      alert('3D 引擎已经初始化过了');
      updateStatus('已初始化');
      return;
    }

    try {
      const success = engine.engine.initialize({
        backgroundColor: 0x333333,
        version: 'v2',
        showStats: false,
        showViewCube: true
      });

      if (success) {
        updateStatus('已初始化');
        console.log('3D 引擎初始化成功');
      } else {
        updateStatus('初始化失败');
        console.error('3D 引擎初始化失败');
      }
    } catch (error: any) {
      updateStatus('初始化错误');
      console.error('3D 引擎初始化错误:', error);
    }
  }, [updateStatus]);

  const loadModel = useCallback((url?: string) => {
    const engine = engineRef.current;
    if (!engine || !engine.engine) {
      alert('引擎未创建');
      return;
    }

    if (!engine.engine.isInitialized()) {
      alert('请先初始化 3D 引擎！');
      return;
    }

    const modelUrl = url || DEFAULT_MODEL_URL;
    if (!modelUrl.trim()) {
      alert('请输入模型 URL');
      return;
    }

    setIsLoading(true);
    try {
      engine.engine.loadModel([modelUrl], {
        position: [0, 0, 0],
        rotation: [0, 0, 0],
        scale: [1, 1, 1]
      });
      console.log('模型加载请求已发送:', modelUrl);
    } catch (error: any) {
      console.error('模型加载错误:', error);
    } finally {
      setTimeout(() => setIsLoading(false), 2000);
    }
  }, []);

  const setLang = useCallback((lang: 'zh-CN' | 'en-US') => {
    if (engineRef.current) {
      engineRef.current.setLocale(lang);
    }
  }, []);

  const setTheme = useCallback((themeName: 'dark' | 'light') => {
    if (engineRef.current) {
      engineRef.current.setTheme(themeName);
    }
  }, []);

  const setCustomTheme = useCallback(() => {
    if (!engineRef.current) return;
    engineRef.current.setCustomTheme({
      name: 'red-alert',
      primary: '#d32f2f',
      primaryHover: '#b71c1c',
      background: '#ffebee',
      panelBackground: 'rgba(255, 255, 255, 0.9)',
      textPrimary: '#b71c1c',
      textSecondary: '#e57373',
      border: '#ffcdd2',
      icon: '#d32f2f',
      iconActive: '#b71c1c',
      componentBackground: 'rgba(255, 205, 210, 0.3)',
      componentHover: 'rgba(255, 205, 210, 0.8)',
      componentActive: '#e57373'
    });
  }, []);

  const openTestDialog = useCallback(() => {
    if (!engineRef.current || !engineRef.current.dialog) return;
    engineRef.current.dialog.create({
      title: 'dialog.testTitle',
      width: 350,
      height: 200,
      position: 'center',
      draggable: true,
      resizable: true
    });
  }, []);

  const openInfoDialog = useCallback(() => {
    if (!engineRef.current || !engineRef.current.dialog) return;
    engineRef.current.dialog.showInfoDialog();
  }, []);

  const openTreeDialog = useCallback(() => {
    if (!engineRef.current || !engineRef.current.modelTree) return;
    engineRef.current.modelTree.showStructTree();
  }, []);

  const toggleToolbar = useCallback((visible: boolean) => {
    if (!engineRef.current || !engineRef.current.toolbar) return;
    engineRef.current.toolbar.setVisible(visible);
  }, []);

  const toggleLabel = useCallback((visible: boolean) => {
    if (!engineRef.current || !engineRef.current.toolbar) return;
    engineRef.current.toolbar.setShowLabel(visible);
  }, []);

  const pauseRendering = useCallback(() => {
    if (!engineRef.current?.engine?.isInitialized()) {
      alert('请先初始化 3D 引擎！');
      return;
    }
    engineRef.current.engine.pauseRendering();
    console.log('渲染已暂停');
  }, []);

  const resumeRendering = useCallback(() => {
    if (!engineRef.current?.engine?.isInitialized()) {
      alert('请先初始化 3D 引擎！');
      return;
    }
    engineRef.current.engine.resumeRendering();
    console.log('渲染已恢复');
  }, []);

  return (
    <div style={{ display: 'flex', width: '100%', height: '100%', overflow: 'hidden' }}>
      <ControlPanel
        engineStatus={engineStatus}
        isLoading={isLoading}
        onInitEngine={initEngine}
        onLoadModel={loadModel}
        onSetLang={setLang}
        onSetTheme={setTheme}
        onSetCustomTheme={setCustomTheme}
        onOpenTestDialog={openTestDialog}
        onOpenInfoDialog={openInfoDialog}
        onOpenTreeDialog={openTreeDialog}
        onToggleToolbar={toggleToolbar}
        onToggleLabel={toggleLabel}
        onPauseRendering={pauseRendering}
        onResumeRendering={resumeRendering}
      />
      <div
        ref={containerRef}
        style={{
          flex: 1,
          position: 'relative',
          background: '#1a1a1a',
          overflow: 'hidden'
        }}
      />
      {isLoading && (
        <div
          style={{
            position: 'fixed',
            top: '50%',
            left: '50%',
            transform: 'translate(-50%, -50%)',
            background: 'rgba(0, 0, 0, 0.8)',
            color: '#fff',
            padding: '20px 40px',
            borderRadius: '8px',
            zIndex: 9999,
            fontSize: '16px'
          }}
        >
          模型加载中...
        </div>
      )}
    </div>
  );
}