# -*- coding: utf-8 -*-
"""智能体路由：每用户隔离的身份 CRUD。

智能体"基础信息 + 身份 CRUD"托管在服务端（后续入数据库）；运行时配置、workspace、
技能、对话仍由 PineAgents 主后端在本地管理。本地后端把 /agents 的身份部分转发到这里。
"""
from __future__ import annotations

from fastapi import APIRouter, Depends, HTTPException

from ..dependencies import get_db, require_port
from ...infrastructure.models import AgentCreate, AgentInfo, AgentUpdate
from ...infrastructure.repositories import Database

router = APIRouter(prefix="/agents", tags=["agents"])


def _agent_info(record: dict) -> AgentInfo:
    """构建 AgentInfo，`deletable` 以记录中的 flag 为准（服务端决定）。"""
    rec = dict(record)
    rec.setdefault("deletable", True)
    rec.setdefault("port", "opc")
    return AgentInfo(**rec)


@router.get("", response_model=list[AgentInfo], summary="当前用户智能体列表")
async def list_agents(
    user: dict = Depends(require_port),
    db: Database = Depends(get_db),
):
    return [_agent_info(r) for r in await db.agents.get_by_user(user["id"], port=user["port"])]


@router.get("/{agent_id}", response_model=AgentInfo, summary="智能体详情")
async def get_agent(
    agent_id: str,
    user: dict = Depends(require_port),
    db: Database = Depends(get_db),
):
    record = await db.agents.get(agent_id, user["id"], port=user["port"])
    if record is None:
        raise HTTPException(status_code=404, detail="Agent not found")
    return _agent_info(record)


@router.post(
    "",
    response_model=AgentInfo,
    status_code=201,
    summary="创建智能体身份",
)
async def create_agent(
    req: AgentCreate,
    user: dict = Depends(require_port),
    db: Database = Depends(get_db),
):
    if not req.name.strip():
        raise HTTPException(status_code=400, detail="Agent name is required")
    record = await db.agents.create(
        user["id"],
        req.name,
        description=req.description,
        language=req.language or "zh",
        model_name=req.model_name,
        port=user["port"],
    )
    return _agent_info(record)


@router.put("/{agent_id}", response_model=AgentInfo, summary="更新智能体身份")
async def update_agent(
    agent_id: str,
    req: AgentUpdate,
    user: dict = Depends(require_port),
    db: Database = Depends(get_db),
):
    payload = req.model_dump(exclude_none=True)
    if not payload:
        raise HTTPException(status_code=400, detail="Nothing to update")
    record = await db.agents.update(agent_id, user["id"], payload, port=user["port"])
    if record is None:
        raise HTTPException(status_code=404, detail="Agent not found")
    return _agent_info(record)


@router.delete("/{agent_id}", status_code=204, summary="删除智能体")
async def delete_agent(
    agent_id: str,
    user: dict = Depends(require_port),
    db: Database = Depends(get_db),
):
    record = await db.agents.get(agent_id, user["id"], port=user["port"])
    if record is None:
        raise HTTPException(status_code=404, detail="Agent not found")
    if not record.get("deletable", True):
        raise HTTPException(
            status_code=400,
            detail="Cannot delete this agent",
        )
    if not await db.agents.delete(agent_id, user["id"], port=user["port"]):
        raise HTTPException(status_code=404, detail="Agent not found")
    return None