package session

import (
	"context"

	"github.com/simonfxr/pubsub"
	agent "ollie/session"
	"ollie/backend"
)

// Core is the interface that a session implementation must satisfy.
// Defined here (at the consumer) rather than in ollie/session so that
// the core package exports only a concrete struct with no interface overhead.
// Tests can substitute a lightweight stub.
type Core interface {
	Submit(ctx context.Context, input string)
	Interrupt(cause error) bool
	Inject(prompt string)
	Queue(prompt string)
	PopQueue() (string, bool)
	Bus() *pubsub.Bus
	IsRunning() bool
	State() string
	Reply() string
	AgentName() string
	BackendName() string
	ModelName() string
	CWD() string
	SetCWD(dir string) error
	SetSessionID(newID string) error
	Context() []backend.Message
	SystemPrompt() string
	GenerationParams() backend.GenerationParams
	SetGenerationParams(params backend.GenerationParams) error
	CompactionModel() string
	SetCompactionModel(model string)
	Usage() string
	Cost() string
	CtxSz() string
	ListModels() string
	WaitChange(ctx context.Context, field, current string) (string, bool)
	SaveSession(path string) error
	Close()
	Detach() bool
	ListDetached() []agent.DetachedInfo
	SignalDetached(pid, signal int) error
	GetDetachedOutput(pid int) (string, error)
	DismissDetached(pid int) bool
	InjectSystemEvent(content string)
	React(emoji string)
	ReactTo(responseID, emoji string) error
	Reactions() map[string]string
	ToolCallCount() int64
	SetEnv(key, value string)
}