package agent

import (
	"sync"

	"github.com/simonfxr/pubsub"
	"ollie/backend"
	olog "ollie/log"
	"ollie/toolsrv"
)

// AgentCfg is the configuration for constructing a new Agent.
type AgentCfg struct {
	History        *History
	Runtime        *Runtime
	AgentName      string
	AgentsDir      string
	AgentID        string // unique agent identity
	CWD            string // working directory for tool execution
	BaseLayers     []string
	PromptEnvExtra []string
	NewToolServer  func() toolsrv.Runner
	NewBackend     func(string) (backend.Backend, error)
	Bus            *pubsub.Bus
	Log            *olog.Logger
	AuditLog       *olog.Logger
	SessionID      string
	StartupMsgs    []string
	ReadPlanStep   func() string
	SaveSession    func()
	FlushSave      func()
}

// NewAgent constructs an Agent from the given configuration.
func NewAgent(cfg AgentCfg) *Agent {
	ag := &Agent{
		history:         cfg.History,
		runtime:         cfg.Runtime,
		agentName:       cfg.AgentName,
		agentsDir:       cfg.AgentsDir,
		id:              cfg.AgentID,
		cwd:             cfg.CWD,
		baseLayers:      cfg.BaseLayers,
		promptEnvExtra:  cfg.PromptEnvExtra,
		newToolServer:   cfg.NewToolServer,
		newBackend:      cfg.NewBackend,
		bus:             cfg.Bus,
		log:             cfg.Log,
		auditLog:        cfg.AuditLog,
		sessionID:       cfg.SessionID,
		startupMessages: cfg.StartupMsgs,
		readPlanStep:    cfg.ReadPlanStep,
		saveSession:     cfg.SaveSession,
		flushSave:       cfg.FlushSave,
		state:           "idle",
	}
	ag.changeCond = sync.NewCond(&ag.changeMu)
	ag.wireToolsChanged()
	return ag
}