编辑“︁Module:PageSummary”︁

local p = {}

-- 剥离 [[File:]] [[文件:]] [[Category:]] 等，防止出现在摘要文本中
local function stripImages(text)
    if not text or text == "" then return "" end
    
    -- 统一常见前缀写法，方便后续匹配
    text = text:gsub("%[%[(文件|Image|图像):", "[[File:")
           :gsub("%[%[(分类|Category):", "[[Category:")
    
    local out = {}
    local i = 1
    local len = #text
    
    while i <= len do
        if text:byte(i) == 91 and text:byte(i+1) == 91 then  -- [[
            local chunk = text:sub(i, i+15)
            if chunk:match("^%[%[File:") or chunk:match("^%[%[Category:") then
                local depth = 1
                local j = i + 2
                while j <= len and depth > 0 do
                    if text:byte(j) == 91 and text:byte(j+1) == 91 then
                        depth = depth + 1
                        j = j + 2
                    elseif text:byte(j) == 93 and text:byte(j+1) == 93 then
                        depth = depth - 1
                        j = j + 2
                    else
                        j = j + 1
                    end
                end
                i = j
            else
                table.insert(out, "[[")
                i = i + 2
            end
        else
            table.insert(out, text:sub(i, i))
            i = i + 1
        end
        
        if i > 1200 then break end
    end
    
    return table.concat(out)
end

-- 清理模板、引用、注释、标题、列表等
local function cleanFinal(text)
    if not text or text == "" then return "" end
    
    text = text
        :gsub("{{[^{}]*}}", "")
        :gsub("<ref.-</?ref[^>]*>", "")
        :gsub("<!%-%-.-%-%->", "")
        :gsub("\n==+[^=]+==+", " ")
        :gsub("\n%s*[*#:;]+", " ")
        :gsub("%s*\n%s*", " ")
        :gsub("%s+", " ")
    
    return mw.text.trim(text)
end

function p.getSummaryAndImage(frame)
    local pageName = mw.text.trim(frame.args[1] or "")
    if pageName == "" then return "" end
    
    local title = mw.title.new(pageName)
    if not title or not title.exists then return "" end
    
    local content = title:getContent()
    if not content or content == "" then return "" end
    
    local rawExcerpt = mw.ustring.sub(content, 1, 300) or ""
    
    -- 提取第一张图片 - 分开匹配各种常见写法，减少编码问题
    local firstImage =
        mw.ustring.match(rawExcerpt, "%[%[File:([^|%]]+)") or
        mw.ustring.match(rawExcerpt, "%[%[文件:([^|%]]+)") or
        mw.ustring.match(rawExcerpt, "%[%[Image:([^|%]]+)") or
        mw.ustring.match(rawExcerpt, "%[%[图像:([^|%]]+)")
    
    -- 备用方案：抓完整链接再校验命名空间
    if not firstImage then
        local full = mw.ustring.match(rawExcerpt, "%[%[([^%]]+)%]%]")
        if full then
            local ns, name = mw.ustring.match(full, "^([^:]+):(.+)$")
            if ns and (ns == "File" or ns == "文件" or ns == "Image" or ns == "图像") then
                firstImage = ns .. ":" .. name
            end
        end
    end
    
    -- 额外清理文件名（去除隐藏字符、两端空格等）
    if firstImage then
        firstImage = mw.text.trim(firstImage or "")
        firstImage = mw.ustring.gsub(firstImage, "^[%z%s]+", "")
        firstImage = mw.ustring.gsub(firstImage, "[%z%s]+$", "")
    end
    
    local step1     = stripImages(rawExcerpt) or ""
    local cleanText = cleanFinal(step1) or ""
    
    local targetLen = 120
    local summary   = cleanText:sub(1, targetLen * 2) or ""
    
    local ulen = mw.ustring.len(summary) or 0
    if ulen > targetLen then
        summary = mw.ustring.sub(summary, 1, targetLen) or ""
        
        local rev = summary:reverse()
        local lastBreak = rev:find("[ %s%p，。！？；：,…]") or 1
        if lastBreak > 1 and lastBreak < 20 then
            summary = mw.ustring.sub(summary, 1, #summary - lastBreak + 1) or ""
        end
        
        summary = mw.text.trim(summary) .. "..."
    end
    
    summary = mw.text.trim(summary)
    
    -- HTML 输出
    local container = mw.html.create('div')
        :css('margin-bottom', '25px')
        :css('display', 'flow-root')
    
    container:tag('div')
        :css('font-size', '1.3em')
        :css('font-weight', 'bold')
        :css('margin-bottom', '6px')
        :css('border-bottom', '1px solid #eee')
        :wikitext('[[' .. pageName .. ']]')
    
    local textDiv = container:tag('div')
        :css('line-height', '1.6')
        :css('color', '#222')
        :css('font-size', '14px')
    
    if firstImage and firstImage ~= "" then
        local imgWikitext = '[[' .. firstImage .. '|120px|right|link=' .. pageName .. ']]'
        textDiv:wikitext(imgWikitext)
    end
    
    textDiv:wikitext(summary)
    
    return tostring(container)
end

return p