import { Sources } from '@ant-design/x';
import XMarkdown, { type ComponentProps } from '@ant-design/x-markdown';
import { Tooltip } from 'antd';
import React, { useMemo } from 'react';
import type { RetrieverResource } from '~/api/dify-chat';
import '../../styles/components/chat-with-llm/markdown.css';

interface MarkdownProps {
    content: string;
    className?: string;
    retrieverResources?: RetrieverResource[];
}

/**
 * 引用索引组件 - 在文本中显示可点击的引用标记
 */
const SourceRefComponent = React.memo(({
    children,
    resources
}: ComponentProps & { resources?: RetrieverResource[] }) => {
    const refNumber = parseInt(`${children}` || '0', 10);

    // 如果没有资源数据或引用号无效，只显示上标数字
    if (!resources || resources.length === 0 || refNumber <= 0) {
        return <sup className="source-ref-plain">[{children}]</sup>;
    }

    // 查找对应的资源
    const resource = resources.find(r => r.position === refNumber);
    if (!resource) {
        return <sup className="source-ref-plain">[{children}]</sup>;
    }

    // 构建引用项列表 - 显示完整内容
    const items = resources.map((r) => ({
        title: `${r.position}. ${r.document_name}`,
        key: r.position,
        description: r.content || '',
    }));

    return (
        <Sources
            activeKey={refNumber}
            title={`[${children}]`}
            items={items}
            inline={true}
        />
    );
});

SourceRefComponent.displayName = 'SourceRefComponent';

/**
 * 引用来源面板组件 - 在消息下方显示所有引用（独立导出）
 */
export const SourcesPanel = React.memo(({ resources }: { resources: RetrieverResource[] }) => {
    if (!resources || resources.length === 0) {
        return null;
    }

    return (
        <div className="sources-panel">
            <div className="sources-panel-header">
                <i className="ri-file-text-line"></i>
                <span>引用来源</span>
            </div>
            <div className="sources-panel-list">
                {resources.map((resource) => (
                    <Tooltip
                        key={`${resource.segment_id}-${resource.position}`}
                        title={
                            <div className="source-tooltip">
                                <div className="source-tooltip-header">
                                    <strong>{resource.document_name}</strong>
                                </div>
                                <div className="source-tooltip-content">
                                    {resource.content}
                                </div>
                                <div className="source-tooltip-meta">
                                    <span>相关度: {(resource.score * 100).toFixed(0)}%</span>
                                    <span style={{ marginLeft: 12 }}>来源: {resource.dataset_name}</span>
                                </div>
                            </div>
                        }
                        placement="top"
                        autoAdjustOverflow={true}
                        color="rgba(0, 104, 74, 0.92)"
                        classNames={{ root: 'source-tooltip-overlay' }}
                        overlayStyle={{ maxWidth: 'calc(100vw - 32px)' }}
                    >
                        <div className="source-item">
                            <span className="source-item-number">{resource.position}</span>
                            <span className="source-item-name">{resource.document_name}</span>
                            <span className="source-item-score">
                                {(resource.score * 100).toFixed(0)}%
                            </span>
                        </div>
                    </Tooltip>
                ))}
            </div>
        </div>
    );
});

SourcesPanel.displayName = 'SourcesPanel';

/**
 * Markdown 渲染组件
 * 使用 @ant-design/x-markdown 进行 Markdown 解析，支持流式渲染
 */
export default function Markdown({
    content,
    className = '',
    retrieverResources
}: MarkdownProps) {
    // 创建自定义的 sup 组件，传入引用资源
    const customComponents = useMemo(() => {
        return {
            sup: (props: ComponentProps) => (
                <SourceRefComponent {...props} resources={retrieverResources} />
            ),
        };
    }, [retrieverResources]);

    if (!content) {
        return null;
    }

    return (
        <div className={`markdown-content ${className}`}>
            <XMarkdown
                components={customComponents}
                paragraphTag="div"
            >
                {content}
            </XMarkdown>
        </div>
    );
}