desungongpai/app/routers/locations.py

"""
Locations Router - 位置数据接口
API endpoints for querying location records and device tracks.
"""

import math
from datetime import datetime

from fastapi import APIRouter, Body, Depends, HTTPException, Query
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession

from app.database import get_db
from app.models import LocationRecord
from app.schemas import (
    APIResponse,
    LocationRecordResponse,
    PaginatedList,
)
from app.services import device_service, location_service

router = APIRouter(prefix="/api/locations", tags=["Locations / 位置数据"])


@router.get(
    "",
    response_model=APIResponse[PaginatedList[LocationRecordResponse]],
    summary="获取位置记录列表 / List location records",
)
async def list_locations(
    device_id: int | None = Query(default=None, description="设备ID / Device ID"),
    location_type: str | None = Query(default=None, description="定位类型 / Location type (gps/lbs/wifi)"),
    start_time: datetime | None = Query(default=None, description="开始时间 / Start time (ISO 8601)"),
    end_time: datetime | None = Query(default=None, description="结束时间 / End time (ISO 8601)"),
    page: int = Query(default=1, ge=1, description="页码 / Page number"),
    page_size: int = Query(default=20, ge=1, le=100, description="每页数量 / Items per page"),
    db: AsyncSession = Depends(get_db),
):
    """
    获取位置记录列表，支持按设备、定位类型、时间范围过滤。
    List location records with filters for device, location type, and time range.
    """
    records, total = await location_service.get_locations(
        db,
        device_id=device_id,
        location_type=location_type,
        start_time=start_time,
        end_time=end_time,
        page=page,
        page_size=page_size,
    )
    return APIResponse(
        data=PaginatedList(
            items=[LocationRecordResponse.model_validate(r) for r in records],
            total=total,
            page=page,
            page_size=page_size,
            total_pages=math.ceil(total / page_size) if total else 0,
        )
    )


@router.get(
    "/latest/{device_id}",
    response_model=APIResponse[LocationRecordResponse | None],
    summary="获取设备最新位置 / Get latest location",
)
async def latest_location(device_id: int, db: AsyncSession = Depends(get_db)):
    """
    获取指定设备的最新位置信息。
    Get the most recent location record for a device.
    """
    # Verify device exists
    device = await device_service.get_device(db, device_id)
    if device is None:
        raise HTTPException(status_code=404, detail=f"Device {device_id} not found / 未找到设备{device_id}")

    record = await location_service.get_latest_location(db, device_id)
    if record is None:
        return APIResponse(
            code=0,
            message="No location data available / 暂无位置数据",
            data=None,
        )
    return APIResponse(data=LocationRecordResponse.model_validate(record))


@router.post(
    "/batch-latest",
    response_model=APIResponse[list[LocationRecordResponse | None]],
    summary="批量获取设备最新位置 / Batch get latest locations",
)
async def batch_latest_locations(
    device_ids: list[int] = Body(..., min_length=1, max_length=100, embed=True),
    db: AsyncSession = Depends(get_db),
):
    """
    传入 device_ids 列表，返回每台设备的最新位置（按输入顺序）。
    Pass device_ids list, returns latest location per device in input order.
    """
    records = await location_service.get_batch_latest_locations(db, device_ids)
    result_map = {r.device_id: r for r in records}
    return APIResponse(data=[
        LocationRecordResponse.model_validate(result_map[did]) if did in result_map else None
        for did in device_ids
    ])


@router.get(
    "/track/{device_id}",
    response_model=APIResponse[list[LocationRecordResponse]],
    summary="获取设备轨迹 / Get device track",
)
async def device_track(
    device_id: int,
    start_time: datetime = Query(..., description="开始时间 / Start time (ISO 8601)"),
    end_time: datetime = Query(..., description="结束时间 / End time (ISO 8601)"),
    max_points: int = Query(default=10000, ge=1, le=50000, description="最大轨迹点数 / Max track points"),
    db: AsyncSession = Depends(get_db),
):
    """
    获取设备在指定时间范围内的运动轨迹（按时间正序排列）。
    Get device movement track within a time range (ordered chronologically).
    """
    # Verify device exists
    device = await device_service.get_device(db, device_id)
    if device is None:
        raise HTTPException(status_code=404, detail=f"Device {device_id} not found / 未找到设备{device_id}")

    if start_time >= end_time:
        raise HTTPException(
            status_code=400,
            detail="start_time must be before end_time / 开始时间必须早于结束时间",
        )

    records = await location_service.get_device_track(db, device_id, start_time, end_time, max_points=max_points)
    return APIResponse(
        data=[LocationRecordResponse.model_validate(r) for r in records]
    )


@router.get(
    "/{location_id}",
    response_model=APIResponse[LocationRecordResponse],
    summary="获取位置记录详情 / Get location record",
)
async def get_location(location_id: int, db: AsyncSession = Depends(get_db)):
    """按ID获取位置记录详情 / Get location record details by ID."""
    result = await db.execute(
        select(LocationRecord).where(LocationRecord.id == location_id)
    )
    record = result.scalar_one_or_none()
    if record is None:
        raise HTTPException(status_code=404, detail=f"Location {location_id} not found")
    return APIResponse(data=LocationRecordResponse.model_validate(record))