"""
插件 API 端点。
"""

from fastapi import APIRouter, HTTPException

from app.plugins.manager import get_plugin_manager
from app.plugins.models import PluginStatus
from app.plugins.model_probe import probe_all_providers, probe_cpu_only_environment

router = APIRouter()


@router.get("/")
async def get_plugins():
    """获取所有插件列表。"""
    manager = get_plugin_manager()
    return manager.get_plugin_list()


@router.get("/stats")
async def get_plugins_stats():
    """获取插件统计信息。"""
    manager = get_plugin_manager()
    return manager.get_system_plugin_summary()


@router.get("/providers/status")
async def get_providers_status():
    """获取所有模型 Provider 的 CPU-only 可用性状态。

    不强制加载完整模型，仅检查依赖和缓存。
    用于前端展示模型可用性和部署环境信息。
    """
    result = probe_all_providers()
    return result.model_dump(mode="json")


@router.get("/providers/environment")
async def get_provider_environment():
    """获取 CPU-only 环境探测信息。

    检查 HuggingFace 缓存目录、Hub 可用性、GPU 状态等。
    """
    return probe_cpu_only_environment()


@router.get("/{plugin_name}")
async def get_plugin(plugin_name: str):
    """获取指定插件详情。"""
    manager = get_plugin_manager()
    detail = manager.get_plugin_detail(plugin_name)
    if detail is None:
        raise HTTPException(status_code=404, detail=f"插件 {plugin_name} 不存在")
    return detail


@router.post("/{plugin_name}/enable")
async def enable_plugin(plugin_name: str):
    """启用插件。"""
    manager = get_plugin_manager()
    result = manager.enable_plugin(plugin_name)
    if not result.success:
        raise HTTPException(
            status_code=_operation_error_status(manager, plugin_name),
            detail=result.error or result.message,
        )
    return result


@router.post("/{plugin_name}/disable")
async def disable_plugin(plugin_name: str):
    """禁用插件。"""
    manager = get_plugin_manager()
    result = manager.disable_plugin(plugin_name)
    if not result.success:
        raise HTTPException(status_code=400, detail=result.error or result.message)
    return result


def _operation_error_status(manager, plugin_name: str) -> int:
    """依赖错误按契约返回 409，其它非法状态迁移保持 400。"""
    if manager.get_plugin_status(plugin_name) == PluginStatus.DEPENDENCY_ERROR:
        return 409
    return 400