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from typing import List, Optional, Dict, Any
from pydantic import BaseModel, Field
from enum import Enum
import time

# --- Enums ---
class SessionStatus(str, Enum):
    ACTIVE = "active"
    STOPPED = "stopped"
    ARCHIVED = "archived"

class MessageRole(str, Enum):
    USER = "user"
    ASSISTANT = "assistant"
    SYSTEM = "system"
    TOOL = "tool"

# --- Entities ---
class Message(BaseModel):
    role: MessageRole
    content: str
    timestamp: int = Field(default_factory=lambda: int(time.time()))
    tool_calls: Optional[List[Dict[str, Any]]] = None
    tool_call_id: Optional[str] = None

class Session(BaseModel):
    session_id: str
    title: str
    created_at: int = Field(default_factory=lambda: int(time.time()))
    updated_at: int = Field(default_factory=lambda: int(time.time()))
    status: SessionStatus = SessionStatus.ACTIVE
    messages: List[Message] = []
    metadata: Dict[str, Any] = {}

# --- API Request/Response Models ---

class StandardResponse(BaseModel):
    code: int
    msg: str
    data: Optional[Any] = None

class SessionResponse(BaseModel):
    session_id: str
    title: str
    latest_message: Optional[str] = None
    latest_message_at: Optional[int] = None
    status: SessionStatus
    unread_message_count: int = 0

class SessionDetailResponse(BaseModel):
    session_id: str
    title: str
    events: List[Dict[str, Any]] = [] # Simplified for now, can be specific Event models

class ChatRequest(BaseModel):
    message: str
    timestamp: Optional[int] = None
    event_id: Optional[str] = None

class ShellRequest(BaseModel):
    session_id: str

class FileRequest(BaseModel):
    file: str

class ShellResponse(BaseModel):
    output: str
    session_id: str
    console: List[Dict[str, str]]

class FileResponse(BaseModel):
    content: str
    file: str