Agent-System-Backend/internal/cardsvc/cardsvc.go

// Package cardsvc 是收件箱任务卡的服务层：创建/状态迁移/置顶/弃置/动作裁决，
// 每次变更持久化并经事件通道发布 card.* 投影（服务端权威，前端是投影）。
// 确认动作的语义回执由调用方写进对话时间线（resolved 事件即审计锚点）。
package cardsvc

import (
	"errors"
	"strings"
	"sync"
	"time"

	"agent-system-backend/internal/store"
	core "agent-system-core"
)

// Emitter 由宿主注入（runmgr 事件缓冲包装）：卡片事件走与会话事件同一管道，
// 获得持久化、seq 排序、断线重放与终态对账（Stream 契约）。
type Emitter func(conversationID, runID string, typ core.StreamEventType, payload any) error

var (
	ErrNotFound    = store.ErrNotFound // 语义对齐存储层：跨租户/不存在一律 NotFound
	ErrNoAction    = errors.New("card: action not found")
	ErrNotAwaiting = errors.New("card: not awaiting action")
)

// cardAppendWindow 是流式追加（Append）的 card.updated 发布节流窗口（D45）。
const cardAppendWindow = 250 * time.Millisecond

type Service struct {
	st                *store.Store
	emit              Emitter
	projectSharedEmit ProjectSharedEmitter
	// MirrorConvCards EXT-12：会话卡是否镜像进项目公共流（缺省 true=现状全量
	// 镜像；false 时会话卡只进本人会话流，项目级卡不受影响）。
	MirrorConvCards bool
	now             func() time.Time
	emitMu          sync.Mutex
	lastEmit        map[string]time.Time // 流式追加的最近发布时刻（按卡）
}

func New(st *store.Store, emit Emitter) *Service {
	return &Service{st: st, emit: emit, now: time.Now, lastEmit: map[string]time.Time{}, MirrorConvCards: true}
}

// ProjectSharedEmitter is an internal trusted publication adapter. It is never
// bound to model arguments or exposed as a mandatory extension capability.
type ProjectSharedEmitter func(owner, producer, channel, runID string, typ core.StreamEventType, payload any) error

func (s *Service) SetProjectSharedEmitter(emit ProjectSharedEmitter) { s.projectSharedEmit = emit }

// PublishProjectCard explicitly publishes a project-level structural snapshot.
// Ordinary Create/Update remain private unless this entry issues a new proof.
func (s *Service) PublishProjectCard(owner, producer string, card core.ActivityCard, ref string) (core.ActivityCard, error) {
	if s.projectSharedEmit == nil || owner == "" || producer == "" || card.ProjectID == "" || card.ConversationID != "" {
		return card, errors.New("card: trusted project publisher required")
	}
	if card.ID != "" {
		current, err := s.st.GetCard(owner, card.ID)
		if err != nil {
			return card, err
		}
		if current.ProjectID != card.ProjectID || current.ConversationID != "" {
			return card, store.ErrNotFound
		}
	} else {
		card.ID = store.NewID("card")
	}
	now := s.now().UTC()
	card.CreatedAt = now
	card.UpdatedAt = now
	if card.Status == "" {
		card.Status = core.CardActive
	}
	if err := s.st.SaveCard(owner, &card, ref); err != nil {
		return card, err
	}
	err := s.projectSharedEmit(owner, producer, string(core.ProjectChannelKey(card.ProjectID)), card.SourceRunID, core.EvCardCreated, core.CardPayload{Card: card})
	return card, err
}

// emitCard 按卡归属发布卡片事件（D50）：
//   - 会话卡 → 会话流；同时镜像项目流（伪会话键 "project:<projectId>"）——
//     项目收件箱聚合视图（项目级卡 ∪ 各会话未决卡）的实时性依赖它；卡片事件
//     量小，全量镜像换取口径简单。
//   - 项目级卡（ConversationID 空、ProjectID 非空）→ 只发布项目流。
//   - 无归属（收件箱关闭期的纯持久化）不发布。
func (s *Service) emitCard(c core.ActivityCard, typ core.StreamEventType, payload any) error {
	if s.emit == nil || (c.ConversationID == "" && c.ProjectID == "") {
		return nil
	}
	if c.ConversationID != "" {
		if err := s.emit(c.ConversationID, c.SourceRunID, typ, payload); err != nil {
			return err
		}
		// EXT-12 最小开关：会话卡不镜像进项目公共流（不发布即不持久，
		// 重放天然不含会话卡）；项目级卡（无会话归属）不受影响。
		if !s.MirrorConvCards {
			return nil
		}
	}
	if c.ProjectID != "" {
		return s.emit(string(core.ProjectChannelKey(c.ProjectID)), c.SourceRunID, typ, payload)
	}
	return nil
}

// Create 补全标识与时间戳、持久化并发布 card.created。ref 为投影引用
// （HITL 投影卡 = "hitl:<id>"，to_project 留档副本 = "to_project:<原卡ID>"）；
// ConversationID 为空的项目级卡发布到项目流。
func (s *Service) Create(owner string, card core.ActivityCard, ref string) (core.ActivityCard, error) {
	if card.ID == "" {
		card.ID = store.NewID("card")
	}
	now := s.now().UTC()
	card.CreatedAt = now
	card.UpdatedAt = now
	if card.Status == "" {
		card.Status = core.CardActive
	}
	if err := s.st.SaveCard(owner, &card, ref); err != nil {
		return card, err
	}
	return card, s.emitCard(card, core.EvCardCreated, core.CardPayload{Card: card})
}

// Get 读取单卡。
func (s *Service) Get(owner, id string) (core.ActivityCard, error) { return s.st.GetCard(owner, id) }

// List 按会话列出（updated_at 降序；置顶与待办排序是前端关注点）。
func (s *Service) List(owner, conversationID string) ([]core.ActivityCard, error) {
	return s.st.ListCards(owner, conversationID)
}

// Update 保存整卡变更（流式 Body 增量等）并发布 card.updated；ref 保持原值。
// 系统镜像路径（同会话 run 的顺序行为）沿用盲写；用户态裁决走 UpdateVersioned。
func (s *Service) Update(owner string, card core.ActivityCard) error {
	card.UpdatedAt = s.now().UTC()
	if err := s.st.SaveCard(owner, &card, ""); err != nil {
		return err
	}
	return s.emitCard(card, core.EvCardUpdated, core.CardPayload{Card: card})
}

// UpdateVersioned 乐观并发保存（U3，KTD7）：版本不匹配透传 store.ErrConflict，
// HTTP 层映射 409；客户端重读卡后重试。
func (s *Service) UpdateVersioned(owner string, card core.ActivityCard, expectedVersion int) error {
	card.UpdatedAt = s.now().UTC()
	if err := s.st.SaveCardVersioned(owner, &card, "", expectedVersion); err != nil {
		return err
	}
	return s.emitCard(card, core.EvCardUpdated, core.CardPayload{Card: card})
}

// Append 流式追加正文（card_append 工具；D45）：文本并入 body 尾部 markdown
// 节点（尾节点非 markdown 则新增），逐次持久化；card.updated 按 cardAppendWindow
// 节流——窗口内的追加只落库不发布（投影语义：事件携带整卡，后续事件自然覆盖
// 省略的中间投影）。终态发布不受节流影响（SetStatus/Update 恒发布）。
func (s *Service) Append(owner, id, text string) error {
	c, err := s.st.GetCard(owner, id)
	if err != nil {
		return err
	}
	if text != "" {
		if n := len(c.Body); n > 0 && c.Body[n-1].Type == core.UIMarkdown {
			c.Body[n-1].Markdown += text
		} else {
			c.Body = append(c.Body, core.UINode{Type: core.UIMarkdown, Markdown: text})
		}
	}
	c.UpdatedAt = s.now().UTC()
	if err := s.st.SaveCard(owner, &c, ""); err != nil {
		return err
	}
	if c.ConversationID == "" && c.ProjectID == "" {
		return nil // 无归属：只落库不发布
	}
	s.emitMu.Lock()
	last, seen := s.lastEmit[id]
	emit := !seen || s.now().Sub(last) >= cardAppendWindow
	if emit {
		s.lastEmit[id] = s.now()
	}
	s.emitMu.Unlock()
	if !emit {
		return nil
	}
	return s.emitCard(c, core.EvCardUpdated, core.CardPayload{Card: c})
}

// SetStatus 状态迁移：更新并发布 card.status。
func (s *Service) SetStatus(owner, id string, status core.CardStatus, tone, note string) (core.ActivityCard, error) {
	c, ver, err := s.st.GetCardVersion(owner, id)
	if err != nil {
		return c, err
	}
	c.Status = status
	if tone != "" {
		c.Tone = tone
	}
	if err := s.UpdateVersioned(owner, c, ver); err != nil {
		return c, err
	}
	return c, s.emitCard(c, core.EvCardStatus, core.CardStatusPayload{CardID: c.ID, Status: status, Tone: c.Tone, Note: note})
}

// SetPinned 置顶/取消（收件箱"不沉没"语义）。
func (s *Service) SetPinned(owner, id string, pinned bool) (core.ActivityCard, error) {
	c, ver, err := s.st.GetCardVersion(owner, id)
	if err != nil {
		return c, err
	}
	c.Pinned = pinned
	return c, s.UpdateVersioned(owner, c, ver)
}

// Dismiss 关闭卡（非确认语义，留痕）。
func (s *Service) Dismiss(owner, id string) (core.ActivityCard, error) {
	return s.SetStatus(owner, id, core.CardDismissed, "", "dismissed by user")
}

// Action 处理卡上按钮点击：仅 action_required 卡可裁决；结果 resolved 并发布
// card.resolved（ActionID 即按钮语义）。
func (s *Service) Action(owner, id, actionID, freeText string) (core.ActivityCard, string, error) {
	c, ver, err := s.st.GetCardVersion(owner, id)
	if err != nil {
		return c, "", err
	}
	if c.Status != core.CardActionRequired {
		return c, "", ErrNotAwaiting
	}
	label := actionID
	found := false
	for _, a := range c.Actions {
		if a.ID == actionID {
			label = a.Label
			found = true
			break
		}
	}
	switch {
	case found:
	case actionID == "" && freeText != "":
		label = freeText // 自由输入语义
	default:
		return c, "", ErrNoAction
	}
	c.Status = core.CardResolved
	if err := s.UpdateVersioned(owner, c, ver); err != nil {
		return c, "", err
	}
	return c, label, s.emitCard(c, core.EvCardResolved, core.CardResolvedPayload{CardID: c.ID, ActionID: actionID, Answer: freeText})
}

// ToProject 把会话卡留档为项目级卡（D48/D49）：复制为新卡（ConversationID 空，
// AnchorMessageID 指向原卡，body 附留档来源），原卡 dismissed 留痕——不移动
// （会话时间线不可变）。ref "to_project:<原卡ID>" 保证幂等（重复调用返回既有
// 副本，不重复置态）。HITL/命令投影卡（ref 前缀 hitl:/cmd:）拒绝留档——它们
// 与流程状态机绑定，dismiss 会破坏销项语义。
func (s *Service) ToProject(owner, id string) (core.ActivityCard, error) {
	c, err := s.st.GetCard(owner, id)
	if err != nil {
		return c, err
	}
	if c.ConversationID == "" {
		return c, errors.New("card: already project-level")
	}
	if ref, rerr := s.st.CardRef(owner, c.ID); rerr == nil {
		if strings.HasPrefix(ref, "hitl:") || strings.HasPrefix(ref, "cmd:") {
			return c, errors.New("card: flow-bound card cannot be archived to project")
		}
	}
	ref := "to_project:" + c.ID
	if existID, gerr := s.st.CardIDByRef(owner, ref); gerr == nil && existID != "" {
		return s.st.GetCard(owner, existID) // 幂等：已留档
	}
	dup := c
	dup.ID = store.NewID("card")
	dup.ConversationID = ""
	dup.AnchorMessageID = core.ID(c.ID)
	dup.Pinned = false
	dup.Body = append(append([]core.UINode{}, c.Body...), core.UINode{Type: core.UIKV, KV: [][2]string{{"留档", "自会话卡 " + c.ID}}})
	created, err := s.Create(owner, dup, ref)
	if err != nil {
		return created, err
	}
	if _, err := s.SetStatus(owner, c.ID, core.CardDismissed, "info", "已留档到项目"); err != nil {
		return created, err
	}
	return created, nil
}

// ResolveByRef 按引用解析投影卡（HITL resolve 时同步销项："hitl:<id>"）；幂等。
func (s *Service) ResolveByRef(owner, ref, actionID, answer string) error {
	id, err := s.st.CardIDByRef(owner, ref)
	if err != nil {
		if errors.Is(err, store.ErrNotFound) {
			return nil // 无投影卡（历史数据/非确认卡）——静默跳过
		}
		return err
	}
	c, ver, err := s.st.GetCardVersion(owner, id)
	if err != nil {
		return err
	}
	if c.Status.Terminal() {
		return nil // 已决（双现任一侧先到）
	}
	c.Status = core.CardResolved
	if err := s.UpdateVersioned(owner, c, ver); err != nil {
		if errors.Is(err, store.ErrConflict) {
			return nil // 双现任一侧先到（版本竞争败者）：不重试，卡以先到侧为准
		}
		return err
	}
	if c.ConversationID != "" && s.emit != nil {
		return s.emit(c.ConversationID, c.SourceRunID, core.EvCardResolved, core.CardResolvedPayload{CardID: c.ID, ActionID: actionID, Answer: answer})
	}
	return nil
}