package com.cdzy.user.handler;

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 org.postgresql.geometric.PGpoint;

import java.io.IOException;

/**
 * PGpoint 反序列化器 - 将 JSON 直接反序列化为 PGpoint
 */
public class PGpointDeserializer extends JsonDeserializer<PGpoint> {

    @Override
    public PGpoint deserialize(JsonParser p, DeserializationContext ctxt) throws IOException {
        JsonNode node = p.getCodec().readTree(p);

        if (node.isNull()) {
            return null;
        }

        try {
            // 方式1: GeoJSON 格式
            if (node.isObject() && node.has("type") && "point".equals(node.get("type").asText())) {
                JsonNode longitude = node.get("longitude");
                JsonNode latitude = node.get("latitude");
                if (longitude != null && latitude != null) {
                    double x = longitude.asDouble();
                    double y =latitude.asDouble();
                    return new PGpoint(x, y);
                }
            }
            // 方式2: 简单对象格式 { "x": 116.3974, "y": 39.9093 }
            else if (node.isObject() && node.has("x") && node.has("y")) {
                double x = node.get("x").asDouble();
                double y = node.get("y").asDouble();
                return new PGpoint(x, y);
            }
            // 方式3: 数组格式 [116.3974, 39.9093]
            else if (node.isArray() && node.size() >= 2) {
                double x = node.get(0).asDouble();
                double y = node.get(1).asDouble();
                return new PGpoint(x, y);
            }
            // 方式4: 字符串格式 "(116.3974,39.9093)"
            else if (node.isTextual()) {
                return new PGpoint(node.asText());
            }
        } catch (Exception e) {
            throw new IOException("Failed to deserialize PGpoint: " + node, e);
        }

        throw new IOException("Unsupported PGpoint format: " + node);
    }

    @Override
    public Class<PGpoint> handledType() {
        return PGpoint.class;
    }
}