package taskrun

import (
	"context"
	"sync"
	"time"

	"chat-agent-system/internal/stream"
)

// CreateRequest 创建后台任务运行实例。
type CreateRequest struct {
	SessionID      string
	ProjectID      int64
	UserID         int64
	ClientTurnID   string
	TaskKey        string
	Stage          string
	WorkDir        string
	UserMessage    string
	AssistantMsgID int64
	IncludeDetails bool
	TaskReq        any // *server task payload converted to bizdev request at execution layer
}

// RunRecord 运行实例状态。
type RunRecord struct {
	RunID          string
	SessionID      string
	ProjectID      int64
	UserID         int64
	ClientTurnID   string
	TaskKey        string
	Stage          string
	Status         string // pending | running | completed | failed | cancelled | status_conflict
	WorkspaceID    string
	AssistantMsgID int64
	CreatedAt      time.Time
	UpdatedAt      time.Time
	ErrorMessage   string
}

// StoredEvent 持久化 SSE 事件（支持重连重放）。
type StoredEvent struct {
	Seq   int64
	Event stream.StreamEvent
}

type activeRun struct {
	record   *RunRecord
	events   []StoredEvent
	nextSeq  int64
	subs     map[int]chan StoredEvent
	subSeq   int
	cancel   context.CancelFunc
	done     chan struct{}
	mu       sync.RWMutex
}