package org.mariotaku.simplerestapi.http;

import android.util.Pair;

import org.mariotaku.simplerestapi.RequestInfo;
import org.mariotaku.simplerestapi.Utils;

import java.util.Arrays;
import java.util.List;

/**
 * Created by mariotaku on 15/2/6.
 */
public class Endpoint {

    private String url;

    public String getUrl() {
        return url;
    }

    public Endpoint(String url) {
        this.url = url;
    }

    public static String constructUrl(String endpoint, RequestInfo requestInfo) {
        return constructUrl(endpoint, requestInfo.getPath(), requestInfo.getQueries());
    }

    public String construct(String path, List<Pair<String, String>> queries) {
        return constructUrl(url, path, queries);
    }

    @SafeVarargs
    public final String construct(String path, Pair<String, String>... queries) {
        return constructUrl(url, path, Arrays.asList(queries));
    }

    public static String constructUrl(String endpoint, String path, List<Pair<String, String>> queries) {
        if (endpoint == null) throw new NullPointerException("Endpoint is null");
        final StringBuilder urlBuilder = new StringBuilder();
        if (endpoint.charAt(endpoint.length() - 1) == '/') {
            urlBuilder.append(endpoint.substring(0, endpoint.length() - 1));
        } else {
            urlBuilder.append(endpoint);
        }
        if (path != null) {
            if (path.charAt(0) != '/') {
                urlBuilder.append('/');
            }
            urlBuilder.append(path);
        }
        return constructUrl(urlBuilder.toString(), queries);
    }

    public static String constructUrl(String url, List<Pair<String, String>> queries) {
        if (queries == null || queries.isEmpty()) return url;
        final StringBuilder urlBuilder = new StringBuilder(url);
        for (int i = 0, j = queries.size(); i < j; i++) {
            final Pair<String, String> item = queries.get(i);
            urlBuilder.append(i != 0 ? '&' : '?');
            urlBuilder.append(Utils.encode(item.first, "UTF-8"));
            urlBuilder.append('=');
            urlBuilder.append(Utils.encode(item.second, "UTF-8"));
        }
        return urlBuilder.toString();
    }

    @SafeVarargs
    public static String constructUrl(String url, Pair<String, String>... queries) {
        return constructUrl(url, Arrays.asList(queries));
    }
}