package com.chameleonvision.vision.camera;

import com.chameleonvision.vision.Pipeline;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.type.MapType;
import com.fasterxml.jackson.databind.type.ArrayType;
import com.fasterxml.jackson.databind.type.TypeFactory;
import com.google.gson.*;

import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

public class CameraDeserializer implements JsonDeserializer<Camera> {
	@Override
	public Camera deserialize(JsonElement jsonElement, Type type, JsonDeserializationContext context) throws JsonParseException {
		try {
			var jsonObj = jsonElement.getAsJsonObject();
			var camFOV = jsonObj.get("FOV").getAsDouble();
			var camName = jsonObj.get("name").getAsString();
			var camNickname = jsonObj.get("nickname").getAsString();
			var videoModeIndex = jsonObj.get("resolution").getAsInt();
			var isDriver = jsonObj.get("isDriver").getAsBoolean();
			var driverExposure = jsonObj.get("driverExposure").getAsInt();
			var driverBrightness = jsonObj.get("driverBrightness").getAsInt();
			var divisor = StreamDivisor.values()[jsonObj.get("streamDivisor").getAsInt()];

			var pipelines = jsonObj.get("pipelines");
			List<Pipeline> actualPipelines = new ArrayList<>();
			ObjectMapper mapper = new ObjectMapper();
			TypeFactory typeFactory = mapper.getTypeFactory();
			JavaType arrayType = typeFactory.constructCollectionType(List.class, Pipeline.class);
			try {
				actualPipelines = mapper.readValue(pipelines.toString(), arrayType);
			} catch (JsonProcessingException e) {
				e.printStackTrace();
			}

			var newCamera = actualPipelines != null ? new Camera(camName, camFOV, actualPipelines, videoModeIndex, divisor, driverExposure, driverBrightness,isDriver) : new Camera(camName, camFOV, videoModeIndex, divisor, driverExposure, driverBrightness,isDriver);
			newCamera.setNickname(camNickname != null ? camNickname : "");
			return newCamera;
		}
		catch (NullPointerException e)
		{
			System.err.println("Error while reading json, value doesn't exist!");
			System.err.println("Try to delete the camera settings in settings/cameras/YOURCAMERA.json");
			e.printStackTrace();
			return null;
		}
	}
}