package flow

import (
	"ai-agent/workflow/consts/node"
	nodeDao "ai-agent/workflow/dao/node"
	"ai-agent/workflow/model/dto"
	flowDto "ai-agent/workflow/model/dto/flow"
	nodeDto "ai-agent/workflow/model/dto/node"
	"ai-agent/workflow/model/entity"
	"bytes"
	"context"
	"fmt"
	"io"
	"mime/multipart"
	"net/http"
	"net/url"
	"path/filepath"
	"regexp"
	"strconv"
	"strings"
	"sync"

	commonHttp "gitea.redpowerfuture.com/red-future/common/http"
	"gitea.redpowerfuture.com/red-future/common/utils"
	"github.com/gogf/gf/v2/errors/gerror"
	"github.com/gogf/gf/v2/frame/g"
	"github.com/gogf/gf/v2/util/gconv"
	"github.com/tidwall/sjson"
)

// 全局等待任务回调的工具
var (
	asyncMu    sync.Mutex
	asyncTasks = make(map[string]chan any)
)

// Wait 阻塞等待回调结果
// 调用后会一直卡住，直到 Notify 唤醒 或 超时/取消
func Wait(ctx context.Context, taskId string) (any, error) {
	asyncMu.Lock()
	ch := make(chan any, 1)
	asyncTasks[taskId] = ch
	asyncMu.Unlock()

	defer close(ch)
	for {
		select {
		case result := <-ch:
			return result, nil
		case <-ctx.Done():
			asyncMu.Lock()
			delete(asyncTasks, taskId)
			asyncMu.Unlock()
			return nil, ctx.Err()
		}
	}
}

// Notify 回调时调用，唤醒等待的任务
func Notify(taskId string, result any) {
	asyncMu.Lock()
	defer asyncMu.Unlock()

	ch, exist := asyncTasks[taskId]
	if !exist {
		return
	}
	ch <- result
	delete(asyncTasks, taskId)
}

func GetIsChatModel(ctx context.Context) (res *flowDto.GetIsChatModelRes, err error) {
	headers := make(map[string]string)
	if r := g.RequestFromCtx(ctx); r != nil {
		for k, v := range r.Request.Header {
			if len(v) > 0 {
				headers[k] = v[0]
			}
		}
	}
	res = new(flowDto.GetIsChatModelRes)
	err = commonHttp.Get(ctx, "model-gateway/model/getIsChatModel", headers, res, nil)
	return
}

func GetModelInfo(ctx context.Context, req *flowDto.GetModelInfoReq) (res *flowDto.GetModelInfoRes, err error) {
	headers := make(map[string]string)
	if r := g.RequestFromCtx(ctx); r != nil {
		for k, v := range r.Request.Header {
			if len(v) > 0 {
				headers[k] = v[0]
			}
		}
	}
	res = new(flowDto.GetModelInfoRes)
	err = commonHttp.Get(ctx, "model-gateway/model/getModel", headers, res, req)
	return
}

func GetComposeResult(ctx context.Context, buildType int, modelName, promptContent, skillName string, form []map[string]any, userForm []map[string]any, fileUrl []string, sessionId, nodeId string, cause string) (res *flowDto.ComposeCallbackReq, err error) {
	if !g.IsEmpty(promptContent) {
		userForm = append(userForm, map[string]any{
			"prompt": promptContent,
		})
	}
	var callbackUrl = utils.GetCallbackURL(ctx, "/flow/execution/composeCallBack")
	var consult = make([]flowDto.Consult, 0)
	var collectFileUrls func(val any) (fullyConsumed bool)
	collectFileUrls = func(val any) (fullyConsumed bool) {
		switch {
		case g.NewVar(val).IsSlice():
			slice := gconv.SliceAny(val)
			allConsumed := false
			for _, item := range slice {
				if collectFileUrls(item) {
					allConsumed = true
				}
			}
			return allConsumed
		case g.NewVar(val).IsMap():
			m := gconv.Map(val)
			allConsumed := false
			for _, item := range m {
				if collectFileUrls(item) {
					allConsumed = true
				}
			}
			return allConsumed
		default:
			s := gconv.String(val)
			if s != "" {
				getFileTypeByPath := GetFileTypeByPath(s)
				if getFileTypeByPath != "" {
					consult = append(consult, flowDto.Consult{
						Type: getFileTypeByPath,
						Url:  s,
					})
					return true
				}
			}
			return false
		}
	}
	var newUserForm []map[string]any
	for _, m := range userForm {
		for k, v := range m {
			if collectFileUrls(v) {
				delete(m, k)
			}
		}
		if len(m) > 0 {
			newUserForm = append(newUserForm, m)
		}
	}
	for _, v := range fileUrl {
		getFileTypeByPath := GetFileTypeByPath(gconv.String(v))
		if getFileTypeByPath != "" {
			consult = append(consult, flowDto.Consult{
				Type: getFileTypeByPath,
				Url:  gconv.String(v),
			})
		}
	}
	msgReq := flowDto.ComposeMessagesReq{
		BuildType:   buildType,
		ModelName:   modelName,
		SkillName:   skillName,
		CallbackUrl: callbackUrl,
		Cause:       cause,
		Form:        form,
		UserForm:    newUserForm,
		Consult:     consult,
		SessionId:   sessionId,
		NodeId:      nodeId,
	}
	headers := make(map[string]string)
	if r := g.RequestFromCtx(ctx); r != nil {
		for k, v := range r.Request.Header {
			if len(v) > 0 {
				headers[k] = v[0]
			}
		}
	}
	msgRes := new(flowDto.ComposeMessagesRes)
	err = commonHttp.Post(ctx, "prompts-core/prompt/composeMessages", headers, msgRes, &msgReq)
	if err != nil {
		return
	}
	if g.IsEmpty(msgRes.TaskId) {
		return nil, fmt.Errorf("msg is empty")
	}
	waitRes, err := Wait(ctx, msgRes.TaskId)
	if err != nil {
		return nil, err
	}
	msg := new(flowDto.ComposeCallbackReq)
	if err = gconv.Struct(waitRes, msg); err != nil {
		return nil, err
	}
	if !g.IsEmpty(msg.ErrorMsg) {
		return nil, fmt.Errorf(msg.ErrorMsg)
	}
	return msg, nil
}

func CreateGatewayTask(ctx context.Context, epicycleId int64, model string, content map[string]any) (map[string]any, error) {
	taskId, err := createGatewayTaskOnly(ctx, epicycleId, model, content)
	if err != nil {
		return nil, err
	}
	return waitGatewayResult(ctx, taskId)
}

// createGatewayTaskOnly creates a gateway task and returns the taskId only
// doesn't wait for completion
func createGatewayTaskOnly(ctx context.Context, epicycleId int64, model string, content map[string]any) (string, error) {
	callbackUrl := utils.GetCallbackURL(ctx, "/flow/execution/modelCallback")
	req := flowDto.ModelGatewayReq{
		ModelName:      model,
		BizName:        g.Cfg().MustGet(ctx, "server.name").String(),
		CallbackUrl:    callbackUrl,
		RequestPayload: content,
		EpicycleId:     epicycleId,
	}

	headers := make(map[string]string)
	if r := g.RequestFromCtx(ctx); r != nil {
		for k, v := range r.Request.Header {
			if len(v) > 0 {
				headers[k] = v[0]
			}
		}
	}

	res := new(flowDto.ModelGatewayRes)
	err := commonHttp.Post(ctx, "model-gateway/task/createTask", headers, res, &req)
	if err != nil {
		return "", err
	}
	if g.IsEmpty(res.TaskId) {
		return "", fmt.Errorf("创建模型任务失败，taskId为空")
	}

	return res.TaskId, nil
}

// waitGatewayResult waits for a created gateway task to complete and returns the result
func waitGatewayResult(ctx context.Context, taskId string) (map[string]any, error) {
	waitRes, err := Wait(ctx, taskId)
	if err != nil {
		return nil, err
	}

	task := new(flowDto.ModelCallbackReq)
	if err = gconv.Struct(waitRes, task); err != nil {
		return nil, err
	}
	if task.State == 3 || !g.IsEmpty(task.ErrorMsg) {
		return nil, fmt.Errorf("模型执行失败：%s", task.ErrorMsg)
	}
	if g.IsEmpty(task.Messages) {
		return nil, fmt.Errorf("模型返回结果为空")
	}
	// 获取远程文件内容
	//file, err := GetFileBytesFromURL(ctx, task.OssFile)
	//if err != nil {
	//	return nil, err
	//}
	//task.Messages = gconv.Map(file)
	return task.Messages, nil
}

// updateTokenCount updates the token count in node execution
func updateTokenCount(ctx context.Context, nodeExecutionId int64, responseField string, result map[string]any) {
	if responseField == "" {
		return
	}
	_, _ = nodeDao.NodeExecutionDao.Update(ctx, &nodeDto.UpdateNodeExecutionReq{
		Id:               nodeExecutionId,
		CompletionTokens: gconv.Int(result[responseField]),
		TotalTokens:      gconv.Int(result[responseField]),
	})
}

func GetModelResult(ctx context.Context, sessionId string, nodeInput *flowDto.NodeExecutionInput, skillName string, form []map[string]any, userForm []map[string]any) (mapTaskResult []map[string]any, err error) {
	buildType := 1
	if nodeInput.Config.NodeCode == node.NodeTypeDataConversionModel {
		buildType = 3
	}

	if !nodeInput.Global.IsDialogue {
		sessionId = ""
	}

	composeResult, err := GetComposeResult(ctx, buildType, nodeInput.Config.ModelConfig.ModelName, nodeInput.Config.PromptContent, skillName, form, userForm, nodeInput.Global.FileUrl, sessionId, nodeInput.Config.Id, nodeInput.Config.Name)
	if err != nil {
		return nil, err
	}

	modelInfo, err := GetModelInfo(ctx, &flowDto.GetModelInfoReq{ModelName: nodeInput.Config.ModelConfig.ModelName})
	if err != nil {
		return nil, err
	}

	mapTaskResult = make([]map[string]any, len(composeResult.Messages.Rounds))
	var taskResultMap map[string]any

	needSequential := false
	if buildType == 1 {
		if needSequential {
			for idx, item := range composeResult.Messages.Rounds {
				if !g.IsEmpty(taskResultMap) {
					var set string
					set, err = sjson.Set(gconv.String(item), modelInfo.Model.LastFrame, gconv.String(taskResultMap[modelInfo.Model.ResponseBody]))
					if err != nil {
						return nil, err
					}
					item = gconv.Map(set)
				}

				var taskResult map[string]any
				taskResult, err = CreateGatewayTask(ctx, composeResult.EpicycleId, nodeInput.Config.ModelConfig.ModelName, item)
				if err != nil {
					return nil, err
				}
				if g.IsEmpty(taskResult) {
					return nil, fmt.Errorf("模型返回结果为空")
				}

				if nodeInput.Config.NodeCode == node.NodeTypeVideoModel {
					ext := GetFileTypeByPath(gconv.String(taskResult[modelInfo.Model.ResponseBody]))
					if ext == "image" {
						taskResultMap = taskResult
					} else {
						taskResultMap = make(map[string]any)
					}
				} else {
					taskResultMap = make(map[string]any)
				}

				mapTaskResult[idx] = taskResult
				updateTokenCount(ctx, nodeInput.NodeExecutionId, modelInfo.Model.ResponseTokenField, taskResult)
			}
		} else {
			taskIdList := make([]string, len(composeResult.Messages.Rounds))

			for idx, item := range composeResult.Messages.Rounds {
				var taskId string
				taskId, err = createGatewayTaskOnly(ctx, composeResult.EpicycleId, nodeInput.Config.ModelConfig.ModelName, item)
				if err != nil {
					return nil, err
				}
				taskIdList[idx] = taskId
			}

			var wg sync.WaitGroup
			errChan := make(chan error, len(taskIdList))

			for idx, taskId := range taskIdList {
				wg.Add(1)

				go func(idx int, taskId string) {
					defer wg.Done()

					var taskResult map[string]any
					taskResult, err = waitGatewayResult(ctx, taskId)
					if err != nil {
						errChan <- err
						return
					}

					mapTaskResult[idx] = taskResult
					updateTokenCount(ctx, nodeInput.NodeExecutionId, modelInfo.Model.ResponseTokenField, taskResult)
				}(idx, taskId)
			}

			wg.Wait()
			close(errChan)

			if len(errChan) > 0 {
				return nil, <-errChan
			}
		}
	} else {
		for idx, item := range composeResult.Messages.Rounds {
			mapTaskResult[idx] = item
			updateTokenCount(ctx, nodeInput.NodeExecutionId, modelInfo.Model.ResponseTokenField, item)
		}
	}

	return mapTaskResult, nil
}

func BuildNestedJson(body g.Map, mockConfigMap map[string]*entity.FlowNode) g.Map {
	jsonStr := "{}"
	for originKey, originItem := range body {
		bodyItemMap := gconv.Map(originItem)
		val := bodyItemMap["value"]
		if v, ok := bodyItemMap["value"]; ok {
			jsonStr, _ = sjson.Set(jsonStr, originKey, v)
		}
		// 判断 value 是不是引用结构（map）
		if g.NewVar(val).IsMap() {
			valMap := gconv.Map(val)
			nodeId := gconv.String(valMap["nodeId"])
			fieldName := gconv.String(valMap["field"])
			if configValue, ok := mockConfigMap[nodeId]; ok {
				if !g.IsEmpty(configValue.OutputResult) {
					for _, v := range configValue.OutputResult {
						if strings.Contains(v.Field, fieldName) {
							if configValue.NodeCode == node.NodeTypeDataConversionModel {
								switch {
								case g.NewVar(v.Value).IsSlice() || g.NewVar(v.Value).IsMap():
									// 核心：自动判断两种结构，精准赋值
									vm := gconv.Map(v.Value)
									// 先判断是否是 单个key包裹的对象（如 {"subtitle_style": {...}}）
									if len(vm) == 1 {
										// 遍历取出唯一的 key 和 真实值
										for innerKey, innerVal := range vm {
											// 直接用 innerKey（subtitle_style）赋值
											jsonStr, _ = sjson.Set(jsonStr, innerKey, innerVal)
										}
									} else {
										// 直接是对象，用 originKey 赋值
										jsonStr, _ = sjson.Set(jsonStr, originKey, v.Value)
									}
								default:
									jsonStr, _ = sjson.Set(jsonStr, originKey, v.Value)
								}
							} else {
								jsonStr, _ = sjson.Set(jsonStr, originKey, v.Value)
							}
						}
					}
				}
				if !g.IsEmpty(configValue.FormConfig) {
					for _, v := range configValue.FormConfig {
						if v.Field == fieldName {
							if v.Type == "uploadMultiple" {
								if g.NewVar(v.FieldConstraint).IsMap() {
									mapFieldConstraint := gconv.Map(v.FieldConstraint)
									for key, value := range mapFieldConstraint {
										if key == "maxFileCount" {
											if gconv.Int(value) == 1 {
												// 如果是单文件上传，则替换成字符串重新赋值给v.Value
												if g.NewVar(v.Value).IsSlice() {
													sliceVal := gconv.SliceAny(v.Value)
													if len(sliceVal) > 0 {
														v.Value = sliceVal[0]
													}
												}
											}
										}
									}
								}
							}
							jsonStr, _ = sjson.Set(jsonStr, originKey, v.Value)
						}
					}
				}
			}
		}
	}
	return gconv.Map(jsonStr)
}

func VideoConcat(ctx context.Context, videoUrls []string) (r any, err error) {
	var httpUrl = "media/video/concat/async"
	headers := make(map[string]string)
	if r := g.RequestFromCtx(ctx); r != nil {
		for k, v := range r.Request.Header {
			if len(v) > 0 {
				headers[k] = v[0]
			}
		}
	}
	var callbackUrl = utils.GetCallbackURL(ctx, "/flow/execution/videoCallback")
	var newBody = flowDto.VideoConcatReq{
		VideoUrls:   videoUrls,
		Method:      "auto",
		Upload:      true,
		CallbackUrl: callbackUrl,
	}
	res := new(flowDto.VideoConcatRes)
	err = commonHttp.Post(ctx, httpUrl, headers, &res, newBody)
	if err != nil {
		return nil, err
	}
	return Wait(ctx, res.TaskId)
}

func GetFileBytesFromURL(ctx context.Context, fileUrl string) ([]byte, error) {
	// 使用 GoFrame 客户端（自带超时、追踪、日志等能力）
	resp, err := g.Client().Get(ctx, fileUrl)
	if err != nil {
		return nil, gerror.Wrapf(err, "failed to request url: %s", fileUrl)
	}
	defer resp.Close()

	// 校验状态码
	if resp.StatusCode != http.StatusOK {
		return nil, gerror.Newf("request failed with status code: %d, url: %s", resp.StatusCode, fileUrl)
	}

	// 读取全部内容
	allBytes, err := io.ReadAll(resp.Body)
	if err != nil {
		return nil, gerror.Wrapf(err, "failed to read response body, url: %s", fileUrl)
	}

	return allBytes, nil
}

func Upload(ctx context.Context, req *dto.UploadFileBytesReq) (*dto.UploadFileBytesRes, error) {
	body := &bytes.Buffer{}
	writer := multipart.NewWriter(body)

	part, err := writer.CreateFormFile("file", req.FileName)
	if err != nil {
		return nil, err
	}
	if _, err = part.Write(req.FileBytes); err != nil {
		return nil, err
	}
	if err = writer.Close(); err != nil {
		return nil, err
	}

	headers := make(map[string]string)
	headers["Content-Type"] = writer.FormDataContentType()
	if r := g.RequestFromCtx(ctx); r != nil {
		if auth := r.Header.Get("Authorization"); auth != "" {
			headers["Authorization"] = auth
		}
	}

	// 发起上传请求
	res := &dto.UploadFileBytesRes{}
	httpUrl := "oss/file/uploadFile"
	if err = commonHttp.Post(ctx, httpUrl, headers, res, body.Bytes()); err != nil {
		return nil, err
	}

	g.Log().Infof(ctx, "[Upload] success url=%s size=%d", res.FileURL, res.FileSize)
	return res, nil
}

func GetFileTypeByPath(filePath string) string {
	if filePath == "" {
		return ""
	}

	// 解析 URL，获取真实路径（兼容 http 链接）
	u, err := url.Parse(filePath)
	if err == nil {
		filePath = u.Path
	}

	// 获取后缀（小写）
	ext := filepath.Ext(filePath)
	ext = strings.ToLower(ext)

	// 判断类型
	switch ext {
	case ".jpg", ".jpeg", ".png", ".gif", ".bmp", ".webp":
		return "image"
	case ".mp4", ".mov", ".avi", ".flv", ".wmv", ".mkv":
		return "video"
	case ".mp3", ".wav", ".m4a", ".flac", ".aac", ".ogg":
		return "audio"
	case ".txt", ".md", ".log", ".json", ".xml", ".inc":
		return "text"
	case ".html":
		return "html"
	case ".pdf", ".doc", ".docx", ".xls", ".xlsx", ".ppt", ".pptx":
		return "document"
	default:
		return ""
	}
}

func BuildText(text string) string {
	// 生成单条HTML
	var htmlBuilder strings.Builder
	htmlBuilder.WriteString(`
<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
            background: #f5f5f5;
            color: #333;
            line-height: 1.8;
            padding: 20px;
        }
        .container {
            max-width: 900px;
            margin: 0 auto;
            background: #fff;
            border-radius: 12px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
            overflow: hidden;
        }
        .item {
            padding: 30px;
        }
        .image-group img {
            width: 100%;
            height: auto;
            display: block;
            margin-bottom: 6px;
            border-radius: 8px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
        }
        .image-group img:last-child {
            margin-bottom: 0;
        }
        .image-group {
            margin-bottom: 25px;
        }
        .text {
            padding: 0;
            font-size: 15px;
            line-height: 1.4;
            color: #555;
        }
        .text h2 {
            font-size: 28px;
            font-weight: bold;
            color: #1a1a1a;
            margin-bottom: 15px;
            line-height: 1.2;
        }
        .text h3 {
            font-size: 20px;
            font-weight: 600;
            color: #2c3e50;
            margin: 20px 0 12px;
            padding-left: 12px;
            border-left: 4px solid #409eff;
        }
        .text p {
            margin-bottom: 12px;
            text-align: justify;
        }
        .text strong {
            color: #e74c3c;
            font-weight: 600;
        }
        .text ul {
            list-style: none;
            padding: 0;
            margin: 8px 0;
        }
        .text ul li {
            padding: 10px 0 10px 30px;
            position: relative;
            line-height: 1.2;
        }
        .text ul li:before {
            content: "●";
            color: #409eff;
            font-size: 12px;
            position: absolute;
            left: 12px;
            top: 12px;
        }
        @media (max-width: 768px) {
            body {
                padding: 10px;
            }
            .text h2 {
                font-size: 24px;
            }
            .text h3 {
                font-size: 18px;
            }
        }
    </style>
</head>
<body>
    <div class="container">
        <div class="item">
`)
	// 🔥 写入文案前：删除 <p class="image-count">需要配图：X 张</p>
	if text != "" {
		// 写入清理后的文案
		htmlBuilder.WriteString(fmt.Sprintf(`<div class="text">%s</div>`, ImageTagRegex(text)))
	}
	htmlBuilder.WriteString(`</div>
    </div>
</body>
</html>`)

	return htmlBuilder.String()
}

func BuildHtml(text string, images []string) string {
	var htmlBuilder strings.Builder
	htmlBuilder.WriteString(`<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: "Microsoft YaHei", sans-serif;
            padding: 20px;
            background-color: #f6f6f6;
            line-height: 1.7;
            font-size: 16px;
            color: #333;
        }
        .container {
            max-width: 750px;
            margin: 0 auto;
            background: #fff;
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
        }

    </style>
</head>
<body>
    <div class="container">
`)
	// 写入图片（支持0张、1张、多张）
	if len(images) > 0 {
		htmlBuilder.WriteString(`<div class="image-group">`)
		for _, imgUrl := range images {
			htmlBuilder.WriteString(fmt.Sprintf(`<img src="%s" alt="图片"/>`, imgUrl))
		}
		htmlBuilder.WriteString(`</div>`)
	}
	htmlBuilder.WriteString(`
<div id="content">加载中...</div>
    </div>

    <script>
        const incUrl = "` + text + `";
        fetch(incUrl)
            .then(res => {
                if (!res.ok) throw new Error("加载失败");
                return res.text();
            })
            .then(text => {
                document.getElementById("content").innerHTML = text;
            })
            .catch(err => {
                document.getElementById("content").innerHTML = "加载失败：" + err.message;
            });
    </script>
</body>
</html>`)

	return htmlBuilder.String()
}

// ExtractImageCount 修复：支持单引号/双引号 + 换行 + 空格
func ExtractImageCount(content string) int {
	// 🔥 关键：支持 class='image-count' （单引号）
	re := regexp.MustCompile(`<p class=['"]image-count['"][^>]*>.*?(\d+).*?</p>`)
	match := re.FindStringSubmatch(content)
	if len(match) >= 2 {
		num, err := strconv.Atoi(match[1])
		if err == nil {
			return num
		}
	}
	return 0
}

func ImageTagRegex(html string) string {
	// 🔥 修复：支持单引号、双引号、空格、换行，100% 删除 <p class='image-count'>
	imageTagRegex := regexp.MustCompile(`<p class=['"]image-count['"][^>]*>[\s\S]*?</p>`)
	return imageTagRegex.ReplaceAllString(html, "")
}

// StripHtmlTags 去掉所有HTML标签，保留换行和文本结构，并删除配图标记行
func StripHtmlTags(html string) string {
	// 1. 替换块级标签为换行，保证排版
	blockTags := regexp.MustCompile(`</?(div|p|h1|h2|h3|h4|h5|h6|li|ul|ol|br|tr|td|th)[^>]*>`)
	text := blockTags.ReplaceAllString(html, "\n")

	// 2. 去掉所有剩余的 HTML 标签
	allTags := regexp.MustCompile(`<[^>]+>`)
	text = allTags.ReplaceAllString(text, "")

	// 4. 清理多余空行（多个换行只保留一个）
	text = regexp.MustCompile(`\n\s*\n`).ReplaceAllString(text, "\n")

	// 5. 只去掉首尾空白，中间换行保留
	text = strings.TrimSpace(text)

	return text
}

// SplitMultiContents 拆分模型返回的多条文案（基于HTML标签分隔）
func SplitMultiContents(htmlContent string) []string {
	var contents []string
	// 正则匹配<div class="content-item" id="content-{序号}">包裹的内容
	re := regexp.MustCompile(`<div class="content-item" id="content-\d+">([\s\S]*?)</div>`)
	matches := re.FindAllStringSubmatch(htmlContent, -1)
	for _, match := range matches {
		if len(match) > 1 {
			// 清理空内容
			trimmed := strings.TrimSpace(match[1])
			if trimmed != "" {
				contents = append(contents, trimmed)
			}
		}
	}
	// 兜底：如果没有匹配到结构化内容，按换行/分隔符拆分
	if len(contents) == 0 {
		contents = strings.Split(htmlContent, "===分隔符===") // 提示词中可新增此兜底规则
	}
	return contents
}

// GetAllImgSrcFromHtml 先把提取img src的工具方法放在外面
func GetAllImgSrcFromHtml(html string) []string {
	var imgSrcList []string
	re := regexp.MustCompile(`<img[^>]*src\s*=\s*["']([^"']+)["']`)
	submatch := re.FindAllStringSubmatch(html, -1)
	for _, match := range submatch {
		if len(match) >= 2 {
			imgSrcList = append(imgSrcList, match[1])
		}
	}
	return imgSrcList
}

// ReplaceImgSrc 替换img src的方法
func ReplaceImgSrc(html string, oldSrc string, newSrc string) string {
	// 精准替换：找到 <img  xxx src="oldSrc"  xxx>
	re := regexp.MustCompile(`(<img[^>]*src\s*=\s*["'])` + regexp.QuoteMeta(oldSrc) + `(["'])`)
	return re.ReplaceAllString(html, `${1}`+newSrc+`${2}`)
}