using System.Collections.Generic;
using System.Net.Http;
using Xunit;

namespace Dapr.Client.Test.Extensions
{
    public class HttpExtensionTest
    {
        [Fact]
        public void AddQueryParameters_ReturnsEmptyQueryStringWithNullParameters()
        {
            const string uri = "https://localhost/mypath";
            var httpRq = new HttpRequestMessage(HttpMethod.Get, uri);
            var updatedUri = httpRq.RequestUri.AddQueryParameters(null);
            Assert.Equal(uri, updatedUri.AbsoluteUri);
        }

        [Fact]
        public void AddQueryParameters_ReturnsOriginalQueryStringWithNullParameters()
        {
            const string uri = "https://localhost/mypath?a=0&b=1";
            var httpRq = new HttpRequestMessage(HttpMethod.Get, uri);
            var updatedUri = httpRq.RequestUri.AddQueryParameters(null);
            Assert.Equal(uri, updatedUri.AbsoluteUri);
        }

        [Fact]
        public void AddQueryParameters_BuildsQueryString()
        {
            var httpRq = new HttpRequestMessage(HttpMethod.Get, "https://localhost/mypath?a=0");
            var updatedUri = httpRq.RequestUri.AddQueryParameters(new List<KeyValuePair<string,string>>
            {
                new("test", "value")
            });
            Assert.Equal("https://localhost/mypath?a=0&test=value", updatedUri.AbsoluteUri);
        }

        [Fact]
        public void AddQueryParameters_BuildQueryStringWithDuplicateKeys()
        {
            var httpRq = new HttpRequestMessage(HttpMethod.Get, "https://localhost/mypath");
            var updatedUri = httpRq.RequestUri.AddQueryParameters(new List<KeyValuePair<string,string>>
            {
                new("test", "1"),
                new("test", "2"),
                new("test", "3")
            });
            Assert.Equal("https://localhost/mypath?test=1&test=2&test=3", updatedUri.AbsoluteUri);
        }

        [Fact]
        public void AddQueryParameters_EscapeSpacesInValues()
        {
            var httpRq = new HttpRequestMessage(HttpMethod.Get, "https://localhost/mypath");
            var updatedUri = httpRq.RequestUri.AddQueryParameters(new List<KeyValuePair<string,string>>
            {
                new("name1", "John Doe"),
                new("name2", "Jane Doe")
            });
            Assert.Equal("https://localhost/mypath?name1=John%20Doe&name2=Jane%20Doe", updatedUri.AbsoluteUri);
        }
    }
}