From 1790192e06101b780a6e68fead8a9fc14fcb7fe1 Mon Sep 17 00:00:00 2001
From: emelianov <troits@list.ru>
Date: Mon, 15 Jun 2026 16:44:51 +0300
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---
 .../angular/AngularMotionService.kt           | 34 +++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/services/pcp-ballistics-service/src/main/kotlin/space/nstart/pcp/pcp_request_service/angular/AngularMotionService.kt b/services/pcp-ballistics-service/src/main/kotlin/space/nstart/pcp/pcp_request_service/angular/AngularMotionService.kt
index a32eb7b..b9d224b 100644
--- a/services/pcp-ballistics-service/src/main/kotlin/space/nstart/pcp/pcp_request_service/angular/AngularMotionService.kt
+++ b/services/pcp-ballistics-service/src/main/kotlin/space/nstart/pcp/pcp_request_service/angular/AngularMotionService.kt
@@ -18,7 +18,10 @@ import space.nstart.pcp.pcp_request_service.service.SatelliteService
 import space.nstart.pcp.pcp_types_lib.dto.ballistics.AngularMotionCalculationRequestDTO
 import space.nstart.pcp.pcp_types_lib.dto.ballistics.AngularMotionModeDTO
 import space.nstart.pcp.pcp_types_lib.dto.ballistics.ExactTimePositionRequestDTO
+import space.nstart.pcp.pcp_types_lib.dto.ballistics.ObjDTO
+import space.nstart.pcp.pcp_types_lib.dto.ballistics.ObjViewRequestDTO
 import space.nstart.pcp.pcp_types_lib.dto.ballistics.OrbPointDTO
+import space.nstart.pcp.pcp_types_lib.dto.ballistics.PositionDTO
 import kotlin.math.PI
 import kotlin.math.abs
 import kotlin.math.atan
@@ -77,6 +80,7 @@ class AngularMotionService(
 
     fun calculate(request: AngularMotionCalculationRequestDTO): AngularMotionCalculationResultDTO {
         validate(request)
+        validateTargetVisibility(request)
         val defaultConfig = AngularMotionConfig()
         val config = AngularMotionConfig(
             focus = request.focusMm ?: defaultConfig.focus,
@@ -146,6 +150,34 @@ class AngularMotionService(
         }
     }
 
+    private fun validateTargetVisibility(request: AngularMotionCalculationRequestDTO) {
+        val windowStart = request.approximateTime.minusMinutes(TARGET_VISIBILITY_WINDOW_MINUTES)
+        val windowStop = request.approximateTime.plusMinutes(TARGET_VISIBILITY_WINDOW_MINUTES)
+        val visiblePoints = satelliteService.mplPoint(
+            ObjViewRequestDTO(
+                satellites = listOf(request.satelliteId),
+                timeStart = windowStart,
+                timeStop = windowStop,
+                obj = ObjDTO(
+                    id = ANGULAR_MOTION_TARGET_ID,
+                    position = PositionDTO(
+                        lat = request.latitudeDeg,
+                        long = request.longitudeDeg,
+                        height = request.heightM,
+                    ),
+                ),
+            ),
+        ).collectList().block().orEmpty()
+
+        if (visiblePoints.isEmpty()) {
+            throw CustomValidationException(
+                "Заданная точка не видна КА ${request.satelliteId} в окрестности времени " +
+                    "${request.approximateTime}: ${windowStart} — ${windowStop}. " +
+                    "Выберите другое время, точку или спутник.",
+            )
+        }
+    }
+
     private fun loadOrbitalPoints(
         request: AngularMotionCalculationRequestDTO,
         config: AngularMotionConfig,
@@ -198,5 +230,7 @@ class AngularMotionService(
 
     private companion object {
         const val MAP_INTERVAL_MINUTES = 5L
+        const val TARGET_VISIBILITY_WINDOW_MINUTES = 15L
+        const val ANGULAR_MOTION_TARGET_ID = "angular-motion-target"
     }
 }