#!/usr/bin/env python3
"""
Tab2内容生成器 - 段落结构
"""
import html as html_module
import re
from typing import Dict, Any, List


def extract_image_numbers(text: str) -> List[int]:
    """
    从文本中提取图片编号

    Args:
        text: 包含图片编号的文本（如"图1"、"图片1"、"图2"或列表）

    Returns:
        图片编号列表（从1开始）
    """
    if not text:
        return []

    # 使用正则表达式提取所有"图X"或"图片X"格式的编号
    matches = re.findall(r'图片?(\d+)', str(text))
    return [int(num) for num in matches]


def render_images(text: str, images: List[str]) -> str:
    """
    根据文本中的图片编号渲染图片HTML

    Args:
        text: 包含图片编号的文本
        images: 原始图片URL列表

    Returns:
        图片HTML字符串
    """
    image_numbers = extract_image_numbers(text)
    if not image_numbers or not images:
        return ""

    html = '<div class="related-images">\n'
    for num in image_numbers:
        # 图片编号从1开始，数组索引从0开始
        idx = num - 1
        if 0 <= idx < len(images):
            html += f'<div class="image-item">\n'
            html += f'<img src="{images[idx]}" alt="图{num}" loading="lazy">\n'
            html += f'<div class="image-label">图{num}</div>\n'
            html += f'</div>\n'
    html += '</div>\n'
    return html


def render_paragraph_tree(paragraphs: List[Dict[str, Any]], level: int = 0, images: List[str] = None) -> str:
    """
    递归渲染段落树（支持展开/收起）

    Args:
        paragraphs: 段落列表
        level: 层级深度
        images: 原始图片URL列表

    Returns:
        HTML字符串
    """
    if not paragraphs:
        return ""

    if images is None:
        images = []

    html = f'<ul class="paragraph-list level-{level}">\n'

    for para in paragraphs:
        para_id = para.get('id', '')
        desc = para.get('描述', '')
        content_range = para.get('内容范围', '')
        reason = para.get('推理依据', '')
        children = para.get('子项', [])

        has_children = bool(children)
        collapsible_class = 'collapsible' if has_children else ''

        html += f'<li class="paragraph-item {collapsible_class}" data-para-id="{html_module.escape(para_id)}">\n'

        # 检查是否有详细信息
        has_details = bool(content_range or reason)

        html += f'<div class="paragraph-header" onclick="toggleCollapse(this)">\n'

        # 添加展开/收起图标
        if has_children:
            html += f'<span class="toggle-icon">▼</span>\n'

        # 将段落索引和描述包裹在一个容器中
        html += f'<div class="paragraph-header-content">\n'
        html += f'<span class="paragraph-index">{html_module.escape(para_id)}</span>\n'
        if desc:
            html += f'<span class="paragraph-desc">{html_module.escape(desc)}</span>\n'
        html += f'</div>\n'

        # 添加详细信息按钮（在标题右侧）
        if has_details:
            html += f'<div class="details-toggle-btn" onclick="event.stopPropagation(); toggleDetails(this)"><span class="details-icon">▶</span> 查看详细内容</div>\n'

        html += f'</div>\n'

        # 将内容包裹在可折叠的容器中
        html += f'<div class="collapsible-content">\n'

        # 添加详细信息区域（可独立收起展开）
        if has_details:
            html += f'<div class="paragraph-details collapsed">\n'
            html += f'<div class="details-content">\n'

            # 添加内容范围（处理列表或字符串类型）
            if content_range:
                if isinstance(content_range, list):
                    # 如果是列表，格式化为带标签的列表
                    range_html = '<ul class="content-range-list">'
                    for item in content_range:
                        range_html += f'<li>{html_module.escape(str(item))}</li>'
                    range_html += '</ul>'
                    html += f'<div class="paragraph-content"><strong>内容范围：</strong>{range_html}</div>\n'
                    # 显示相关图片
                    if images:
                        html += render_images(str(content_range), images)
                else:
                    # 如果是字符串，保持原有格式
                    html += f'<div class="paragraph-content"><strong>内容范围：</strong>{html_module.escape(str(content_range))}</div>\n'
                    # 显示相关图片
                    if images:
                        html += render_images(str(content_range), images)

            # 添加推理依据
            if reason:
                html += f'<div class="paragraph-reason"><strong>推理依据：</strong>{html_module.escape(reason)}</div>\n'

            html += f'</div>\n'
            html += f'</div>\n'

        if children:
            html += render_paragraph_tree(children, level + 1, images)

        html += '</div>\n'
        html += '</li>\n'

    html += '</ul>\n'
    return html


def generate_tab2_content(data: Dict[str, Any]) -> str:
    """生成Tab2内容：段落"""
    html = '<div class="tab-content" id="tab2" style="display:none;">\n'

    if '脚本理解' in data:
        script = data['脚本理解']
        script_images = script.get('图片列表', [])

        html += '<div class="section">\n'
        html += '<h3>脚本理解</h3>\n'
        html += f'<div class="script-category"><strong>内容品类:</strong> {script.get("内容品类", "无")}</div>\n'

        # 段落列表
        if '段落列表' in script and script['段落列表']:
            html += '<div class="section-header">\n'
            html += '<h4>段落结构</h4>\n'
            html += '</div>\n'
            html += render_paragraph_tree(script['段落列表'], images=script_images)

        html += '</div>\n'

    html += '</div>\n'
    return html