import { Component, ErrorInfo, ReactNode } from 'react';
import { Box, Typography, Button, Paper, Container } from '@mui/material';
import ErrorOutlineIcon from '@mui/icons-material/ErrorOutline';
import RefreshIcon from '@mui/icons-material/Refresh';

interface Props {
  children: ReactNode;
}

interface State {
  hasError: boolean;
  error: Error | null;
}

/**
 * 错误边界组件：捕获子组件树中的 JavaScript 错误
 */
export class ErrorBoundary extends Component<Props, State> {
  public state: State = {
    hasError: false,
    error: null,
  };

  public static getDerivedStateFromError(error: Error): State {
    return { hasError: true, error };
  }

  public componentDidCatch(error: Error, errorInfo: ErrorInfo) {
    console.error('Uncaught error:', error, errorInfo);
  }

  private handleReset = () => {
    this.setState({ hasError: false, error: null });
    window.location.reload();
  };

  public render() {
    if (this.state.hasError) {
      return (
        <Container sx={{ mt: 8 }}>
          <Paper
            elevation={0}
            sx={{
              p: 4,
              textAlign: 'center',
              borderRadius: 4,
              border: '1px solid',
              borderColor: 'error.light',
              bgcolor: 'error.shortest',
            }}
          >
            <ErrorOutlineIcon color="error" sx={{ fontSize: 64, mb: 2 }} />
            <Typography variant="h5" fontWeight={800} gutterBottom color="error.main">
              糟糕，出了点问题
            </Typography>
            <Typography variant="body2" color="text.secondary" sx={{ mb: 3 }}>
              应用遇到了一些意外错误。您可以尝试刷新页面或重置应用。
            </Typography>
            {this.state.error && (
              <Box
                sx={{
                  mb: 3,
                  p: 2,
                  bgcolor: 'grey.100',
                  borderRadius: 2,
                  textAlign: 'left',
                  maxHeight: '200px',
                  overflow: 'auto',
                }}
              >
                <Typography
                  variant="caption"
                  component="pre"
                  sx={{
                    fontFamily: 'monospace',
                    whiteSpace: 'pre-wrap',
                    wordBreak: 'break-all',
                    color: 'error.dark',
                  }}
                >
                  {this.state.error.toString()}
                </Typography>
              </Box>
            )}
            <Button
              variant="contained"
              color="error"
              startIcon={<RefreshIcon />}
              onClick={this.handleReset}
              sx={{ borderRadius: 2, fontWeight: 700 }}
            >
              刷新应用
            </Button>
          </Paper>
        </Container>
      );
    }

    return this.props.children;
  }
}

export default ErrorBoundary;