编辑“︁Module:PageSummary”︁

local p = {}

-- 核心逻辑：使用简单的索引查找替代昂贵的正则表达式
function p.getSummaryAndImage(frame)
    local pageName = frame.args[1] or ""
    local title = mw.title.new(pageName)
    if not title or not title.exists then return "" end
    
    local content = title:getContent()
    if not content then return "" end

    -- 1. 预切割：只拿最前面的 400 字符，从源头掐断计算量
    local raw = mw.ustring.sub(content, 1, 400)

    -- 2. 提取图片 (仅提取文件名，不涉及复杂解析)
    local firstImage = string.match(raw, "%[%[[Ff]ile:([^|%]%s]+)") or 
                       string.match(raw, "%[%[文件:([^|%]%s]+)")

    -- 3. 极速清理：只做简单的字符替换，不做嵌套识别
    -- 移除引用、注释、标题符、列表符
    local clean = raw
    clean = string.gsub(clean, "<ref.-</ref>", "")
    clean = string.gsub(clean, "<ref.->", "")
    clean = string.gsub(clean, "<!%-%-.-%-%->", "")
    clean = string.gsub(clean, "\n==+.-==+", " ")
    clean = string.gsub(clean, "\n%s*[*#:]+", " ")
    
    -- 移除图片和模板（不递归，直接找第一个闭合括号就切断）
    -- 这种处理方式虽然可能留下残余的“}}”或“]]”，但绝对保护 CPU
    clean = string.gsub(clean, "%[%[[^%]%[]+%]%]", "")
    clean = string.gsub(clean, "{{[^{}]+}}", "")
    
    -- 清理换行和空格
    clean = string.gsub(clean, "\n", " ")
    clean = string.gsub(clean, "%s+", " ")
    clean = mw.text.trim(clean)

    -- 4. 强制截断 150 字
    local summary = mw.ustring.sub(clean, 1, 150)
    
    -- 最后的安全阀：清理末尾残留的括号碎片
    summary = string.gsub(summary, "[%[%]{}<>]+$", "")
    if mw.ustring.len(clean) > 150 then summary = summary .. "..." end

    -- 5. 渲染
    local container = mw.html.create('div'):css({['margin-bottom']='20px', ['display']='flow-root'})
    if firstImage then
        container:wikitext('[[' .. firstImage .. '|130px|right|link=' .. pageName .. ']]')
    end
    container:tag('div')
        :css({['font-size']='1.2em', ['font-weight']='bold', ['margin-bottom']='4px'})
        :wikitext('[[' .. pageName .. ']]')
    container:tag('div')
        :css({['line-height']='1.5', ['color']='#333', ['font-size']='14px'})
        :wikitext(summary)

    return tostring(container)
end

return p