slogan/server/styleagent/service/plan_effect_image_service.go

package service

import (
	"context"
	"crypto/md5"
	"encoding/hex"
	"fmt"
	"strings"

	"slogan-agent/styleagent/agent"
	"slogan-agent/styleagent/consts"
	"slogan-agent/styleagent/dao"
	"slogan-agent/styleagent/model/entity"

	"github.com/gogf/gf/v2/frame/g"
)

type effectImageService struct{}

var EffectImageService = new(effectImageService)

var effectAngles = []string{"正面", "侧面", "背面"}

// GenerateForPlan 选定主方案后异步生成 3 视角效果图
func (s *effectImageService) GenerateForPlan(ctx context.Context, planId, userId int64) {
	go s.run(ctx, planId, userId)
}

func (s *effectImageService) run(ctx context.Context, planId, userId int64) {
	plan, err := dao.OutfitPlan.GetOne(ctx, planId, userId)
	if err != nil || plan == nil {
		g.Log().Errorf(ctx, "效果图任务: 方案不存在 planId=%d", planId)
		return
	}
	// 每日限额：VIP 不限；普通用户 = 基础额度 + 广告激励额外次数
	if !dao.UserMember.IsVip(ctx, userId) {
		limit := ScoringRuleService.EffectLimit(ctx)
		if limit > 0 {
			used, err := dao.PlanEffectImage.CountByUserToday(ctx, userId)
			if err != nil {
				g.Log().Warningf(ctx, "统计当日效果图数量失败（本次放行）: %v", err)
				used = 0
			}
			extra, err := dao.AdRewardLog.CountTodayByType(ctx, userId, consts.AdTypeEffectExtra)
			if err != nil {
				g.Log().Warningf(ctx, "统计广告奖励次数失败（本次放行）: %v", err)
				extra = 0
			}
			if used >= limit+extra {
				g.Log().Warningf(ctx, "效果图任务: 用户 %d 当日次数已用尽（%d/%d）", userId, used, limit+extra)
				return
			}
		}
	}

	if err := dao.OutfitGenTask.UpdateStatus(ctx, plan.TaskId, consts.TaskStatusRendering, ""); err != nil {
		g.Log().Warningf(ctx, "更新任务 %d 为渲染中失败: %v", plan.TaskId, err)
	}
	defer func() {
		if err := dao.OutfitGenTask.UpdateStatus(ctx, plan.TaskId, consts.TaskStatusDone, ""); err != nil {
			g.Log().Warningf(ctx, "更新任务 %d 为完成失败: %v", plan.TaskId, err)
		}
	}()

	items, err := dao.PlanOutfitItem.ListByPlan(ctx, planId)
	if err != nil {
		g.Log().Warningf(ctx, "读取方案单品失败（效果图描述将缺单品）: %v", err)
	}
	planDesc := planTitleDesc(plan.Title, items)

	// 用户全身正面照作 base image
	baseImageURL := ""
	if photos, err := dao.UserPhoto.ListByUser(ctx, userId, 0); err == nil {
		for _, p := range photos {
			if p.Type == consts.PhotoTypeFullFront {
				baseImageURL = p.Url
				break
			}
		}
	}

	client, err := agent.NewClient(g.Cfg().MustGet(ctx, "imagegen.supplier", "wanx").String())
	if err != nil {
		g.Log().Warningf(ctx, "效果图生成不可用: %v", err)
		return
	}
	// 缓存命中记录批量落库（1 条 multi-row SQL），未命中逐个插入并生成
	var cached []*entity.PlanEffectImage
	var pending []*entity.PlanEffectImage
	for _, angle := range effectAngles {
		if url, ok := agent.CacheGet(effectCacheKey(plan, angle)); ok {
			cached = append(cached, &entity.PlanEffectImage{
				PlanId: planId, Angle: angle, Url: url, Status: consts.EffectStatusDone,
				PromptSnapshot: planDesc,
			})
		} else {
			pending = append(pending, &entity.PlanEffectImage{
				PlanId: planId, Angle: angle, Status: consts.EffectStatusRendering,
				PromptSnapshot: planDesc,
			})
		}
	}
	if err := dao.PlanEffectImage.InsertBatch(ctx, cached); err != nil {
		g.Log().Warningf(ctx, "效果图批量落库失败: %v", err)
	}
	for i, rec := range pending {
		recId, err := dao.PlanEffectImage.Insert(ctx, rec)
		if err != nil {
			continue
		}
		url, err := client.Generate(ctx, &agent.GenerateReq{
			BaseImageURL: baseImageURL, Prompt: planDesc, Angle: rec.Angle, Seed: plan.Id*100 + int64(i),
		})
		if err != nil {
			g.Log().Warningf(ctx, "效果图生成失败 plan=%d angle=%s: %v", planId, rec.Angle, err)
			if updErr := dao.PlanEffectImage.UpdateStatus(ctx, recId, consts.EffectStatusFailed, ""); updErr != nil {
				g.Log().Warningf(ctx, "标记效果图失败状态失败: %v", updErr)
			}
			continue
		}
		agent.CacheSet(effectCacheKey(plan, rec.Angle), url)
		if updErr := dao.PlanEffectImage.UpdateStatus(ctx, recId, consts.EffectStatusDone, url); updErr != nil {
			g.Log().Warningf(ctx, "回写效果图完成状态失败: %v", updErr)
		}
	}
	g.Log().Infof(ctx, "方案 %d 效果图生成完成", planId)
}

func planTitleDesc(title string, items []*entity.PlanOutfitItem) string {
	var sb strings.Builder
	sb.WriteString("方案：")
	sb.WriteString(title)
	sb.WriteString("；")
	for _, it := range items {
		sb.WriteString(it.Slot)
		sb.WriteString("：")
		sb.WriteString(it.Name)
		sb.WriteString("；")
	}
	return strings.TrimSuffix(sb.String(), "；")
}

func effectCacheKey(plan *entity.OutfitPlan, angle string) string {
	sum := md5.Sum([]byte(fmt.Sprintf("%d:%s:%s", plan.Id, plan.Title, angle)))
	return "plan:" + hex.EncodeToString(sum[:])
}