from fastapi import APIRouter
import importlib

from shared.config.settings import settings
from shared.utils.logger import get_logger
from moldinsight.api.route_registry import route_load_status
from moldinsight.api.html_report_router import include_into as include_html_report

logger = get_logger(__name__)

router = APIRouter()

# 业务路由装载清单：新增路由必须登记于此。
# 失败语义（原 _safe_include 仅 WARNING 跳过，进程带病启动不可感知）：
# - 非 DEBUG：记录进 route_load_status["failed"]，/api/health 呈现 degraded
# - DEBUG：直接抛错 fail fast——开发环境路由缺失必须当场暴露
ROUTE_MODULES = [
    # (label, module_path, debug_only)
    ("健康检查", "moldinsight.api.health_router", False),
    ("上传", "moldinsight.api.upload_router", False),
    ("批量", "moldinsight.api.batch_router", False),
    ("任务", "moldinsight.api.task_router", False),
    ("历史", "moldinsight.api.history_router", False),
    ("CAM", "moldinsight.api.cam_router", False),
    ("设计", "moldinsight.api.design_router", False),
    ("成本", "moldinsight.api.cost_router", False),
    ("加工", "moldinsight.api.machining_router", False),
    ("导出", "moldinsight.api.export_router", False),
    ("铝价", "moldinsight.api.aluminum_price_routes", False),
    ("老师傅经验反馈", "moldinsight.api.experience_feedback_router", False),  # D17 Human-in-Loop
    # 调试端点会 dump 全量任务数据，仅 DEBUG 模式注册（双重防线：还需登录）
    ("调试", "moldinsight.api.debug_router", True),
]


def _safe_include(label: str, module_path: str, debug_only: bool = False):
    if debug_only and not settings.DEBUG:
        route_load_status["disabled"].append({"label": label, "module": module_path})
        return
    try:
        module = importlib.import_module(module_path)
        router_obj = getattr(module, "router", None)
        if router_obj is None:
            raise ValueError("未找到 router 对象")
        router.include_router(router_obj)
        route_load_status["loaded"].append({"label": label, "module": module_path})
        logger.info(f"{label} 路由加载成功")
    except Exception as exc:
        route_load_status["failed"].append(
            {"label": label, "module": module_path, "error": str(exc)}
        )
        logger.error(f"{label} 路由加载失败: {exc}")
        if settings.DEBUG:
            raise


for _label, _module_path, _debug_only in ROUTE_MODULES:
    _safe_include(_label, _module_path, _debug_only)


def register_moldinsight_routers(app):
    """注册 moldinsight 全部业务路由到 app（D3 收敛：入口侧单点调用）。

    - /api 聚合路由：各子路由模块装载失败经 ROUTE_MODULES/route_load_status 呈现
      （/api/health degraded，DEBUG fail-fast），见 _safe_include
    - HTML 报告代理挂根路径 /html/{filename}（URL 形状与原 StaticFiles 一致），
      失败同样登记 route_load_status（html_report_router.include_into）
    """
    app.include_router(router, prefix="/api")
    include_html_report(app)