"""
应用升级检查 API
"""
from fastapi import APIRouter, Query

from app.core.config import settings

router = APIRouter(
    prefix="/api/v1/app",
    tags=["app"],
)

# 升级配置（可从 .env 或数据库读取，默认从配置文件）
_LATEST_ANDROID_VERSION = getattr(settings, 'LATEST_ANDROID_VERSION', settings.APP_VERSION)
_LATEST_ANDROID_URL = getattr(settings, 'LATEST_ANDROID_URL', "")
_ANDROID_FORCE_UPDATE_MIN = getattr(settings, 'ANDROID_FORCE_UPDATE_MIN', "1.0.0")
_ANDROID_RELEASE_NOTES = getattr(settings, 'ANDROID_RELEASE_NOTES', "")


def _version_tuple(v: str) -> tuple:
    """将版本号字符串转为可比较的元组。"""
    try:
        return tuple(int(x) for x in v.strip().split("."))
    except (ValueError, AttributeError):
        return (0,)


@router.get("/check-update")
async def check_update(
    platform: str = Query("android", description="平台: android / ios"),
    version: str = Query("1.0.0", description="当前客户端版本号"),
):
    """检查应用是否有新版本可用。"""
    if platform == "android":
        latest = _LATEST_ANDROID_VERSION
        url = _LATEST_ANDROID_URL
        force_min = _ANDROID_FORCE_UPDATE_MIN
        notes = _ANDROID_RELEASE_NOTES
    else:
        latest = settings.APP_VERSION
        url = ""
        force_min = "1.0.0"
        notes = ""

    current_tuple = _version_tuple(version)
    latest_tuple = _version_tuple(latest)
    force_tuple = _version_tuple(force_min)

    has_update = current_tuple < latest_tuple
    force_update = current_tuple < force_tuple

    return {
        "latest_version": latest,
        "current_version": version,
        "has_update": has_update,
        "force_update": force_update,
        "update_url": url or "",
        "release_notes": notes,
    }