package com.example.catchTheLetters.utils;

import com.example.catchTheLetters.entity.*;
import com.example.catchTheLetters.enums.MessageType;
import com.fasterxml.jackson.core.JacksonException;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

import java.io.IOException;

/**
 * 游戏消息反序列化
 *
 * @author spyn
 */
public class GameMessageDeserializer extends JsonDeserializer<GameMessage<?>> {
    private final ObjectMapper objectMapper = new ObjectMapper();

    @Override
    public GameMessage<?> deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException, JacksonException {
        var node = jsonParser.getCodec().readTree(jsonParser);
        var type = objectMapper.convertValue(node.get("type"), JsonNode.class);
        var data = objectMapper.convertValue(node.get("data"), JsonNode.class);
        return switch (type.asText()) {
            case "INPUT" -> new GameMessage<>(MessageType.INPUT, objectMapper.treeToValue(data, PlayerInput.class));
            case "ROOM" -> new GameMessage<>(MessageType.ROOM, objectMapper.treeToValue(data, RoomAction.class));
            case "LETTER" -> new GameMessage<>(MessageType.LETTER, objectMapper.treeToValue(data, LetterAction.class));
            case "SCORE" -> new GameMessage<>(MessageType.SCORE, objectMapper.treeToValue(data, ScoreAction.class));
            case "HEALTH" -> new GameMessage<>(MessageType.HEALTH, objectMapper.treeToValue(data, HealthAction.class));
            default -> throw new IllegalArgumentException("未知的消息类型");
        };
    }
}