"""MCP server API（/tools/mcp-servers，skills-design §6）。

支持两种传输协议：streamable-http / stdio。
stdio 模式通过 /start、/stop、/restart 控制子进程生命周期。
"""

from fastapi import APIRouter, Depends, Query
from fastapi import status as http_status

from app.api.v1.deps import get_optional_tool_runtime
from app.application.tool_runtime.runtime import ToolRuntime
from app.integrations.mcp.process_manager import get_process_manager
from app.schemas.mcp import (
    CreateMcpServerRequest,
    McpServerResponse,
    McpServerStatusResponse,
    UpdateMcpServerRequest,
)
from app.services import mcp as mcp_service

router = APIRouter(prefix="/tools/mcp-servers", tags=["mcp"])


@router.post(
    "",
    response_model=McpServerResponse,
    status_code=http_status.HTTP_201_CREATED,
)
async def register_mcp_server(
    payload: CreateMcpServerRequest,
    runtime: ToolRuntime | None = Depends(get_optional_tool_runtime),
) -> McpServerResponse:
    """注册 MCP server。

    streamable-http：同步拉取工具清单并注册到运行时。
    stdio：只存 DB，需后续调用 /start 启动子进程后拉取工具。
    """
    return await mcp_service.register_mcp_server(
        name=payload.name,
        transport=payload.transport,
        endpoint_url=payload.endpoint_url,
        auth_token=payload.auth_token,
        command=payload.command,
        args_json=payload.args_json,
        env_json=payload.env_json,
        cwd=payload.cwd,
        status=payload.status,
        runtime=runtime,
        process_manager=get_process_manager(),
    )


@router.get("", response_model=list[McpServerResponse])
async def list_mcp_servers(
    status: str | None = Query(default=None, description="按状态过滤：enabled/disabled"),
) -> list[McpServerResponse]:
    """列举 MCP server（含工具清单摘要）。"""
    return await mcp_service.list_mcp_servers(status=status)


@router.patch(
    "/{server_id}",
    response_model=McpServerResponse,
)
async def update_mcp_server(
    server_id: str,
    payload: UpdateMcpServerRequest,
    runtime: ToolRuntime | None = Depends(get_optional_tool_runtime),
) -> McpServerResponse:
    """更新 MCP server 字段（部分更新）。"""
    return await mcp_service.update_mcp_server(
        server_id,
        status=payload.status,
        endpoint_url=payload.endpoint_url,
        auth_token=payload.auth_token,
        command=payload.command,
        args_json=payload.args_json,
        env_json=payload.env_json,
        cwd=payload.cwd,
        runtime=runtime,
        process_manager=get_process_manager(),
    )


@router.delete("/{server_id}", status_code=http_status.HTTP_204_NO_CONTENT)
async def delete_mcp_server(
    server_id: str,
    runtime: ToolRuntime | None = Depends(get_optional_tool_runtime),
) -> None:
    """删除 MCP server（先 stop 子进程再删）。"""
    await mcp_service.delete_mcp_server(
        server_id,
        runtime=runtime,
        process_manager=get_process_manager(),
    )


@router.post(
    "/{server_id}/start",
    response_model=McpServerStatusResponse,
)
async def start_mcp_server(
    server_id: str,
    runtime: ToolRuntime | None = Depends(get_optional_tool_runtime),
) -> McpServerStatusResponse:
    """启动 stdio MCP server 子进程，拉取工具并注册。"""
    return await mcp_service.start_mcp_server(
        server_id,
        runtime=runtime,
        process_manager=get_process_manager(),
    )


@router.post(
    "/{server_id}/stop",
    response_model=McpServerStatusResponse,
)
async def stop_mcp_server(
    server_id: str,
    runtime: ToolRuntime | None = Depends(get_optional_tool_runtime),
) -> McpServerStatusResponse:
    """停止 stdio MCP server 子进程，注销工具。"""
    return await mcp_service.stop_mcp_server(
        server_id,
        runtime=runtime,
        process_manager=get_process_manager(),
    )


@router.post(
    "/{server_id}/restart",
    response_model=McpServerStatusResponse,
)
async def restart_mcp_server(
    server_id: str,
    runtime: ToolRuntime | None = Depends(get_optional_tool_runtime),
) -> McpServerStatusResponse:
    """重启 stdio MCP server。"""
    return await mcp_service.restart_mcp_server(
        server_id,
        runtime=runtime,
        process_manager=get_process_manager(),
    )


@router.get(
    "/{server_id}/status",
    response_model=McpServerStatusResponse,
)
async def get_mcp_server_status(
    server_id: str,
) -> McpServerStatusResponse:
    """查询 MCP server 进程状态。"""
    return await mcp_service.get_mcp_server_status(
        server_id,
        process_manager=get_process_manager(),
    )


@router.post(
    "/{server_id}/refresh",
    response_model=McpServerResponse,
)
async def refresh_mcp_server_tools(
    server_id: str,
    runtime: ToolRuntime | None = Depends(get_optional_tool_runtime),
) -> McpServerResponse:
    """重新拉取 MCP server 工具清单并注册到运行时。"""
    return await mcp_service.refresh_mcp_server_tools(
        server_id,
        runtime=runtime,
        process_manager=get_process_manager(),
    )