package com.onemap.spotoverlap.utils;

import com.google.gson.Gson;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.geotools.data.FileDataStore;
import org.geotools.data.shapefile.ShapefileDataStoreFactory;
import org.geotools.referencing.CRS;
import org.opengis.referencing.crs.CoordinateReferenceSystem;

import java.io.File;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.Base64;
import java.util.List;
import java.util.Map;

public class GeoServer {

    public static void main(String[] args) {
        try {
            List<String> styles = getStyles("http://127.0.0.1:28085/geoserver", "admin", "geoserver", "spot");
            System.out.println(styles);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * 获取geoserver工作空间下的所有样式
     *
     * @param geoserverurl
     * @param username
     * @param password
     * @param workspace
     * @return
     * @throws IOException
     */
    public static List<String> getStyles(String geoserverurl, String username, String password, String workspace) throws IOException {
        CloseableHttpClient client = HttpClients.createDefault();
        // TODO 设置 Basic Authentication 头
        String auth = username + ":" + password;
        String encodedAuth = Base64.getEncoder().encodeToString(auth.getBytes(StandardCharsets.UTF_8));

        HttpGet getRequest = new HttpGet(geoserverurl + "/rest/workspaces/" + workspace + "/styles");
        getRequest.setHeader("Authorization", "Basic " + encodedAuth);
        List<String> style = new ArrayList<>();
        try (CloseableHttpResponse response = client.execute(getRequest)) {
            String responseEntity = EntityUtils.toString(response.getEntity());
            System.out.println(responseEntity);
            Gson gson = new Gson();
            // 将 JSON 字符串转换为 Map
            Map<String, Object> responseMap = gson.fromJson(responseEntity, Map.class);
            Map<String, Object> styles = (Map<String, Object>) responseMap.get("styles");
            List<Map> stylelist = (List<Map>) styles.get("style");
            System.out.println(stylelist);
            for (int i = 0; i < stylelist.size(); i++) {
                Map<String, Object> cur = stylelist.get(i);
                style.add(workspace + ":" + cur.get("name"));
            }
        }
        return style;
    }

    /**
     * 将本地shp文件发布到geoserver并配置相应样式
     *
     * @param geoserverurl
     * @param username
     * @param password
     * @param workspace
     * @param filepath
     * @param stylename
     * @throws IOException
     */
    public static void publishShp(String geoserverurl, String username, String password, String workspace, String filepath, String stylename, String datasource, String charset) throws IOException {
//        File file = new File(filepath);
//        String fileName = file.getName();
//        int dotIndex = fileName.lastIndexOf('.');
//        String datasource = dotIndex != -1 ? fileName.substring(0, dotIndex) : fileName;

        CloseableHttpClient client = HttpClients.createDefault();
        // TODO 设置 Basic Authentication 头
        String auth = username + ":" + password;
        String encodedAuth = Base64.getEncoder().encodeToString(auth.getBytes(StandardCharsets.UTF_8));

        // TODO 创建数据存储时的XML请求体，指定文件路径
        String xmlRequest = "<dataStore>" +
                "<name>" + datasource + "</name>" +
                "<connectionParameters>" +
                "<entry key=\"url\">file:" + filepath + "</entry>" +
                "<entry key=\"connector\">Shapefile</entry>" +
                "<entry key=\"charset\">" + charset + "</entry>" +
                "</connectionParameters>" +
                "</dataStore>";
        HttpPost postRequest = new HttpPost(geoserverurl + "/rest/workspaces/" + workspace + "/datastores");
        postRequest.setHeader("Authorization", "Basic " + encodedAuth);
        postRequest.setEntity(new StringEntity(xmlRequest));
        postRequest.setHeader("Content-Type", "application/xml");
        try (CloseableHttpResponse response = client.execute(postRequest)) {
            String responseEntity = EntityUtils.toString(response.getEntity());
            System.out.println(responseEntity);
        }

        // TODO 创建发布图层的请求体
        String publishRequest = "<featureType>" +
                "<title>" + datasource + "</title>" +
                "<name>" + datasource + "</name>" +
                "</featureType>";
        postRequest = new HttpPost(geoserverurl + "/rest/workspaces/" + workspace + "/datastores/" + datasource + "/featuretypes");
        postRequest.setEntity(new StringEntity(publishRequest));
        postRequest.setHeader("Authorization", "Basic " + encodedAuth);
        postRequest.setHeader("Content-Type", "application/xml");
        try (CloseableHttpResponse response = client.execute(postRequest)) {
            String responseEntity = EntityUtils.toString(response.getEntity());
            System.out.println(responseEntity);
        }
        updateStyle(stylename, geoserverurl, username, password, workspace + ":" + datasource);
        client.close();
    }

    public static void updateStyle(String stylename, String geoserverurl, String username, String password, String datasource) {
        try {
            CloseableHttpClient client = HttpClients.createDefault();
            // TODO 创建图层样式的请求体
            String styleRequest = "<layer><defaultStyle>" +
                    "<name>" + stylename + "</name>" +
                    "</defaultStyle></layer>";
            String auth = username + ":" + password;
            String encodedAuth = Base64.getEncoder().encodeToString(auth.getBytes(StandardCharsets.UTF_8));
            HttpPut putRequest = new HttpPut(geoserverurl + "/rest/layers/" + datasource);
            putRequest.setEntity(new StringEntity(styleRequest));
            putRequest.setHeader("Authorization", "Basic " + encodedAuth);
            putRequest.setHeader("Content-Type", "application/xml");
            try (CloseableHttpResponse response = client.execute(putRequest)) {
                String responseEntity = EntityUtils.toString(response.getEntity());
                System.out.println(responseEntity);
            }
            client.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 获取shp文件的epsg编码
     *
     * @param shpFilePath
     * @return
     */
    public static String getShpEPSG(String shpFilePath) {
        try {
            File shpFile = new File(shpFilePath);
            // 通过Shapefile加载数据
            FileDataStore store = new ShapefileDataStoreFactory().createDataStore(shpFile.toURI().toURL());
            // 获取CoordinateReferenceSystem
            CoordinateReferenceSystem crs = store.getSchema().getCoordinateReferenceSystem();
            // 获取SRID
            Integer srid = CRS.lookupEpsgCode(crs, false);
            return "EPSG:" + srid;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "EPSG:4326";
    }
}