"""``POST /uploads/presign`` — COS 直传预签名（FR-SYS-03 / T-P1-27）。

图片不经应用服务器：本接口只做场景/类型/大小校验并签发 PUT 预签名 URL，
字节流由客户端直传 COS。真实联调需在 `.env` 配 COS 四件套
（COS_REGION / COS_SECRET_ID / COS_SECRET_KEY + 场景桶配置
UPLOAD_SCENES_JSON）；本地单测注入 FakeSigner，不依赖任何真实 COS。

``POST /uploads/direct`` — 本地磁盘直传（无 COS 四件套的降级路线，docs
提交 9228f67 决策）：body 即图片原始字节，Content-Type 头申报类型，
scene 走 query（默认 report_photo）。校验口径与 presign 完全一致，
落盘 ``settings.upload_dir``，返回的 object_key 供建报告等接口回传。
"""

from __future__ import annotations

from fastapi import APIRouter, Query, Request

from apps.api.deps import CurrentUserId, SettingsDep, StorageServiceDep
from packages.shared.response import ok
from packages.storage.local import save_direct_upload
from packages.storage.schemas import PresignRequest

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


@router.post("/presign", summary="签发图片直传 COS 的 PUT 预签名 URL")
async def presign_upload(
    user_id: CurrentUserId,
    storage: StorageServiceDep,
    request: PresignRequest,
) -> dict[str, object]:
    presigned = storage.build_presign(user_id=user_id, request=request)
    return ok(presigned.model_dump())


@router.post("/direct", summary="本地磁盘直传图片（无 COS 降级路线）：body 为原始字节")
async def direct_upload(
    user_id: CurrentUserId,
    settings: SettingsDep,
    request: Request,
    scene: str = Query(default="report_photo", min_length=1, max_length=64),
) -> dict[str, object]:
    data = await request.body()
    # Content-Type 头可能带参数（如 "image/jpeg; boundary=…"），只取主类型。
    content_type = request.headers.get("content-type", "").split(";")[0].strip().lower()
    result = save_direct_upload(
        settings, user_id=user_id, scene=scene, content_type=content_type, data=data
    )
    return ok(result.model_dump())