added support for jsonc config

src/jvmTest/kotlin/ConfigTest.kt

@@ -4,9 +4,10 @@ import kotlinx.serialization.json.Json
 import kotlin.test.Test
 import kotlin.test.assertEquals
 import kotlin.test.assertNotNull
+import java.io.File
 
 class ConfigTest {
-    
+
     @Test
     fun testConfigDeserialization() {
         val jsonString = """
@@ -35,9 +36,9 @@ class ConfigTest {
           }
         }
         """.trimIndent()
-        
+
         val config = Json.decodeFromString<Config>(jsonString)
-        
+
         assertNotNull(config)
         assertEquals(false, config.osmData.useLocalExtract)
         assertEquals("virginia.osm.pbf", config.osmData.localFilePath)
@@ -52,4 +53,155 @@ class ConfigTest {
         assertEquals("municipality.glb", config.output.fileName)
         assertEquals(true, config.output.autoOpen)
     }
-}
+
+    @Test
+    fun testJsoncWithSingleLineComments() {
+        val jsoncString = """
+        {
+          // This is a comment about OSM data configuration
+          "osmData": {
+            "useLocalExtract": false, // Use remote data instead
+            "localFilePath": "virginia.osm.pbf",
+            "boundingBox": {
+              "south": 37.115,
+              "west": -76.396,
+              "north": 37.139,
+              "east": -76.345,
+              "description": "Poquoson, VA" // A small city in Virginia
+            },
+            "overpassTimeout": 25 // Timeout in seconds
+          },
+          "projection": {
+            "origin": {
+              "latitude": 37.120907, // Center latitude
+              "longitude": -76.333694 // Center longitude
+            }
+          },
+          "output": {
+            "fileName": "municipality.glb", // Output file name
+            "autoOpen": true // Automatically open the file
+          }
+        }
+        """.trimIndent()
+
+        val config = parseJsonc(jsoncString)
+
+        assertNotNull(config)
+        assertEquals(false, config.osmData.useLocalExtract)
+        assertEquals("virginia.osm.pbf", config.osmData.localFilePath)
+        assertEquals("Poquoson, VA", config.osmData.boundingBox.description)
+        assertEquals(25, config.osmData.overpassTimeout)
+        assertEquals("municipality.glb", config.output.fileName)
+        assertEquals(true, config.output.autoOpen)
+    }
+
+    @Test
+    fun testJsoncWithMultiLineComments() {
+        val jsoncString = """
+        {
+          /* 
+           * OSM Data Configuration
+           * This section configures how OSM data is obtained
+           */
+          "osmData": {
+            "useLocalExtract": false,
+            "localFilePath": "virginia.osm.pbf",
+            "boundingBox": {
+              "south": 37.115,
+              "west": -76.396,
+              "north": 37.139,
+              "east": -76.345,
+              "description": "Poquoson, VA"
+            },
+            "overpassTimeout": 25
+          },
+          /* Projection settings */
+          "projection": {
+            "origin": {
+              "latitude": 37.120907,
+              "longitude": -76.333694
+            }
+          },
+          /*
+           * Output configuration
+           * Controls how the final file is generated
+           */
+          "output": {
+            "fileName": "municipality.glb",
+            "autoOpen": true
+          }
+        }
+        """.trimIndent()
+
+        val config = parseJsonc(jsoncString)
+
+        assertNotNull(config)
+        assertEquals(false, config.osmData.useLocalExtract)
+        assertEquals("Poquoson, VA", config.osmData.boundingBox.description)
+        assertEquals("municipality.glb", config.output.fileName)
+    }
+
+    @Test
+    fun testJsoncWithMixedComments() {
+        val jsoncString = """
+        {
+          // Single line comment at the top
+          "osmData": {
+            /* Multi-line comment
+               about local extract */
+            "useLocalExtract": false, // Inline comment
+            "localFilePath": "virginia.osm.pbf",
+            "boundingBox": {
+              "south": 37.115, // Southern boundary
+              "west": -76.396,
+              "north": 37.139,
+              "east": -76.345,
+              "description": "Poquoson, VA"
+            },
+            "overpassTimeout": 25
+          },
+          "projection": {
+            "origin": {
+              "latitude": 37.120907,
+              "longitude": -76.333694
+            }
+          },
+          "output": {
+            "fileName": "municipality.glb",
+            "autoOpen": true
+          }
+          // Final comment
+        }
+        """.trimIndent()
+
+        val config = parseJsonc(jsoncString)
+
+        assertNotNull(config)
+        assertEquals(false, config.osmData.useLocalExtract)
+        assertEquals("Poquoson, VA", config.osmData.boundingBox.description)
+    }
+
+    @Test
+    fun testLoadActualJsoncFile() {
+        val configFile = File("config.jsonc")
+        if (!configFile.exists()) {
+            println("Skipping test - config.jsonc file not found")
+            return
+        }
+
+        val configText = configFile.readText()
+        val config = parseJsonc(configText)
+
+        assertNotNull(config)
+        assertEquals(false, config.osmData.useLocalExtract)
+        assertEquals("virginia.osm.pbf", config.osmData.localFilePath)
+        assertEquals("Poquoson, VA", config.osmData.boundingBox.description)
+        assertEquals(25, config.osmData.overpassTimeout)
+        assertEquals(37.120907, config.projection.origin.latitude)
+        assertEquals(-76.333694, config.projection.origin.longitude)
+        assertEquals("municipality.glb", config.output.fileName)
+        assertEquals(true, config.output.autoOpen)
+
+        println("✅ Successfully loaded and parsed config.jsonc file with comments!")
+    }
+}