package model

import "context"

// ============================================================
// 核心接口
// ============================================================

// Tool 外部工具接口
type Tool interface {
	Name() string
	Description() string
	Call(ctx context.Context, input string) (string, error)
}

// ChatModel 聊天模型接口，支持同步生成和流式输出
type ChatModel interface {
	Generate(ctx context.Context, messages []ChatMessage) (ChatReply, error)
	Stream(ctx context.Context, messages []ChatMessage) (<-chan ChatStreamEvent, <-chan error)
}

// Agent 智能体接口
type Agent interface {
	Name() string
	Run(ctx context.Context, content ChatContent) (string, error)
	Stream(ctx context.Context, content ChatContent, out chan<- string) error
}

// Runner 运行器接口，管理会话并执行 Agent
type Runner interface {
	CreateSession(userID string) (string, error)
	Run(userID, sessionID string, content ChatContent) ([]string, error)
	Stream(userID, sessionID string, content ChatContent) (<-chan string, <-chan error)
}

// ============================================================
// 注册与存储接口
// ============================================================

// RegisteredAgent 已注册的 Agent 信息
type RegisteredAgent struct {
	AppName   string
	AgentID   string
	AgentName string
	AgentDesc string
	Runner    Runner
}

// AgentRegistry Agent 注册表接口
type AgentRegistry interface {
	Register(agent RegisteredAgent) error
	Get(agentID string) (RegisteredAgent, bool)
	List() []RegisteredAgent
}

// SessionStore 会话存储接口
type SessionStore interface {
	Get(userID, agentID string) (string, bool)
	Set(userID, agentID, sessionID string) error
}