"""会话路由"""

from fastapi import APIRouter, Depends, HTTPException
from sqlalchemy.ext.asyncio import AsyncSession

from app.dependencies import get_db, get_current_user
from app.models.user import User
from app.schemas.conversation import ConversationCreate, ConversationRead, ConversationDetail, GroupCreate
from app.services.conversation_service import ConversationService

router = APIRouter()


@router.get("/", response_model=list[dict])
async def list_conversations(
    user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
):
    """获取会话列表"""
    service = ConversationService(db)
    return await service.get_user_conversations(user.id)


@router.post("/", response_model=dict)
async def create_conversation(
    req: ConversationCreate,
    user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
):
    """创建会话（私聊或群聊）"""
    service = ConversationService(db)
    if req.type == "private":
        if len(req.member_ids) != 1:
            raise HTTPException(status_code=400, detail="私聊只能选择一个用户")
        conv = await service.get_or_create_private(user.id, req.member_ids[0])
    else:
        conv = await service.create_group(user.id, req.name or "群聊", req.member_ids)

    detail = await service.get_conversation_detail(conv.id, user.id)
    return detail


@router.post("/group", response_model=dict)
async def create_group(
    req: GroupCreate,
    user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
):
    """创建群聊"""
    service = ConversationService(db)
    conv = await service.create_group(user.id, req.name, req.member_ids, req.description)
    detail = await service.get_conversation_detail(conv.id, user.id)
    return detail


@router.get("/{conversation_id}", response_model=dict)
async def get_conversation(
    conversation_id: str,
    user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
):
    """获取会话详情"""
    service = ConversationService(db)
    detail = await service.get_conversation_detail(conversation_id, user.id)
    if not detail:
        raise HTTPException(status_code=404, detail="会话不存在或无权访问")
    return detail