package com.flightfeather.uav.common.net
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import com.flightfeather.uav.common.exception.BizException
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import com.google.gson.Gson
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import com.google.gson.JsonElement
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import com.google.gson.JsonObject
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import com.google.gson.JsonParser
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import java.nio.charset.Charset
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/**
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* 高德地图Web服务API
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*/
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object AMapService {
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private const val TAG = "AMapService"
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private const val KEY = "520c5e5cf44c7793104e500cbf0ed711"
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private val httpMethod = HttpMethod("restapi.amap.com", 443, true)
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data class AMapAddress(
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val country: String,
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val province: String,
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val city: String,
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val citycode: String,
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val district: String,
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val adcode: String,
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val township: String,
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val towncode: String,
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val street: String,
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)
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/**
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* 地理逆编码
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* @param location 坐标点
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* @return 所在街道
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*/
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fun reGeo(location:Pair<Double, Double>):AMapAddress {
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val res = httpMethod.get("/v3/geocode/regeo", listOf(
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"key" to KEY,
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"location" to "${location.first},${location.second}"
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))
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val obj = handleRes(res)
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try {
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val a = obj["regeocode"].asJsonObject["addressComponent"].asJsonObject
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return AMapAddress(
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a["country"].asString,
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a["province"].asString,
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"",
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a["citycode"].asString,
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a["district"].asString,
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a["adcode"].asString,
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a["township"].asString,
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a["towncode"].asString,
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a["streetNumber"].asJsonObject["street"].asString,
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)
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} catch (e: Exception) {
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throw BizException("高德API坐标转换错误，${e.message}")
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}
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}
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/**
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* 坐标转换
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* @param locations 原始坐标
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* @param coordsys 原坐标系，可选值：gps;mapbar;baidu;autonavi(不进行转换)
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*/
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fun coordinateConvert(locations: List<Pair<Double, Double>>, coordsys:String="gps"): List<Pair<Double, Double>> {
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val res = httpMethod.get("/v3/assistant/coordinate/convert", listOf(
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"key" to KEY,
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"locations" to locations.joinToString("|") { "${it.first},${it.second}" },
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"coordsys" to coordsys
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))
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val obj = handleRes(res)
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try {
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return obj["locations"].asString.split(";").map {
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val l = it.split(",")
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l[0].toDouble() to l[1].toDouble()
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}
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} catch (e: Exception) {
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throw BizException("高德API坐标转换错误，${e.message}")
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}
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}
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private fun handleRes(res: HttpMethod.MyResponse):JsonObject {
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if (res.success) {
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// val str = if (res.m.responseCharSet == "utf-8") {
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// res.m.responseBodyAsString
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// } else {
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// String(res.m.responseBody, Charset.forName("utf-8"))
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// }
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val str = res.m.responseBodyAsString
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val json = JsonParser.parseString(str)
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return resCheck(json)
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} else {
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throw BizException("高德API网路链接错误，状态码：${res.m.statusCode}")
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}
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}
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private fun resCheck(json: JsonElement): JsonObject {
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if (!json.isJsonObject) throw BizException("高德API失败，返回值不是一个object")
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val jo = json.asJsonObject
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if (jo["status"].asInt != 1) throw BizException("高德API失败，错误${jo["info"]}")
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return jo
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}
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}
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