package orchestration

import (
	"log/slog"
	"time"

	"git.yeij.top/AskaEth/Cyrene_v2/internal/bus"
	"git.yeij.top/AskaEth/Cyrene_v2/internal/runtime/loop"
	"git.yeij.top/AskaEth/Cyrene_v2/internal/runtime/memory"
	"git.yeij.top/AskaEth/Cyrene_v2/internal/runtime/orchestration/audit"
	"git.yeij.top/AskaEth/Cyrene_v2/internal/runtime/orchestration/comm"
	"git.yeij.top/AskaEth/Cyrene_v2/internal/runtime/trace"
)

// Defaults for the orchestration layer.
const (
	// DefaultMaxParallel is the maximum number of sub-agents that run at once
	// when Options.MaxParallel is non-positive.
	DefaultMaxParallel = 4

	// defaultAgentID is the comm probe identity used when Options.AgentID is
	// blank and a probe must be built from Bus.
	defaultAgentID = "orchestrator"
)

// Options configures a Scheduler built by New. All fields are optional; each nil
// dependency degrades gracefully (a missing Loop makes sub-agents fail fast, a
// missing Comm skips progress events, a missing Approver makes Approve error,
// and so on).
type Options struct {
	// MaxParallel caps how many sub-agents execute concurrently. Excess sub-agents
	// queue until a slot frees. Non-positive selects DefaultMaxParallel (4).
	MaxParallel int

	// PerAgentTimeout bounds every sub-agent's run. When it elapses the sub-agent
	// is aborted (status aborted). Non-positive means no timeout.
	PerAgentTimeout time.Duration

	// Loop is the execution template: a *loop.Loop used to run every sub-agent.
	// It must be safe for concurrent Run calls (as loop.Loop documents); the
	// template's agent/tools/guardrails/persona apply to every sub-agent. When
	// nil, sub-agents fail fast with ErrNoRunner.
	Loop *loop.Loop

	// Bus is the in-process event bus used for progress events and, when Comm is
	// nil, to build a default comm probe. When nil no events are published.
	Bus bus.Bus

	// Comm is the comm probe used to publish progress events. When nil, a probe
	// bound to AgentID is built from Bus (when Bus is non-nil).
	Comm *comm.Probe

	// Memory is the long-term memory store used by SinkMemory. Optional.
	Memory *memory.Store

	// Tracer emits a per-sub-agent span (kind subagent) around each run. Optional.
	Tracer *trace.Tracer

	// Approver records sensitive-operation review-and-approve (代审) triggered by
	// Approve. Policy judgement belongs to the upper layer. Optional.
	Approver *audit.Approver

	// Logger is the base logger. Nil is replaced with a discard logger tagged with
	// source "orchestration".
	Logger *slog.Logger

	// AgentID is the comm probe identity. When blank and a probe must be built
	// from Bus, "orchestrator" is used.
	AgentID string
}