using System;
using System.Collections.Generic;
using System.Linq;
using Xunit;

namespace Microsoft.AspNetCore.Authentication.Core.Test
{
    public class AuthenticationPropertiesTests
    {
        [Fact]
        public void DefaultConstructor_EmptyCollections()
        {
            var props = new AuthenticationProperties();
            Assert.Empty(props.Items);
            Assert.Empty(props.Parameters);
        }

        [Fact]
        public void ItemsConstructor_ReusesItemsDictionary()
        {
            var items = new Dictionary<string, string>
            {
                ["foo"] = "bar",
            };
            var props = new AuthenticationProperties(items);
            Assert.Same(items, props.Items);
            Assert.Empty(props.Parameters);
        }

        [Fact]
        public void FullConstructor_ReusesDictionaries()
        {
            var items = new Dictionary<string, string>
            {
                ["foo"] = "bar",
            };
            var parameters = new Dictionary<string, object>
            {
                ["number"] = 1234,
                ["list"] = new List<string> { "a", "b", "c" },
            };
            var props = new AuthenticationProperties(items, parameters);
            Assert.Same(items, props.Items);
            Assert.Same(parameters, props.Parameters);
        }

        [Fact]
        public void GetSetString()
        {
            var props = new AuthenticationProperties();
            Assert.Null(props.GetString("foo"));
            Assert.Equal(0, props.Items.Count);

            props.SetString("foo", "foo bar");
            Assert.Equal("foo bar", props.GetString("foo"));
            Assert.Equal("foo bar", props.Items["foo"]);
            Assert.Equal(1, props.Items.Count);

            props.SetString("foo", "foo baz");
            Assert.Equal("foo baz", props.GetString("foo"));
            Assert.Equal("foo baz", props.Items["foo"]);
            Assert.Equal(1, props.Items.Count);

            props.SetString("bar", "xy");
            Assert.Equal("xy", props.GetString("bar"));
            Assert.Equal("xy", props.Items["bar"]);
            Assert.Equal(2, props.Items.Count);

            props.SetString("bar", string.Empty);
            Assert.Equal(string.Empty, props.GetString("bar"));
            Assert.Equal(string.Empty, props.Items["bar"]);

            props.SetString("foo", null);
            Assert.Null(props.GetString("foo"));
            Assert.Equal(1, props.Items.Count);
        }

        [Fact]
        public void GetSetParameter_String()
        {
            var props = new AuthenticationProperties();
            Assert.Null(props.GetParameter<string>("foo"));
            Assert.Equal(0, props.Parameters.Count);

            props.SetParameter<string>("foo", "foo bar");
            Assert.Equal("foo bar", props.GetParameter<string>("foo"));
            Assert.Equal("foo bar", props.Parameters["foo"]);
            Assert.Equal(1, props.Parameters.Count);

            props.SetParameter<string>("foo", null);
            Assert.Null(props.GetParameter<string>("foo"));
            Assert.Null(props.Parameters["foo"]);
            Assert.Equal(1, props.Parameters.Count);
        }

        [Fact]
        public void GetSetParameter_Int()
        {
            var props = new AuthenticationProperties();
            Assert.Null(props.GetParameter<int?>("foo"));
            Assert.Equal(0, props.Parameters.Count);

            props.SetParameter<int?>("foo", 123);
            Assert.Equal(123, props.GetParameter<int?>("foo"));
            Assert.Equal(123, props.Parameters["foo"]);
            Assert.Equal(1, props.Parameters.Count);

            props.SetParameter<int?>("foo", null);
            Assert.Null(props.GetParameter<int?>("foo"));
            Assert.Null(props.Parameters["foo"]);
            Assert.Equal(1, props.Parameters.Count);
        }

        [Fact]
        public void GetSetParameter_Collection()
        {
            var props = new AuthenticationProperties();
            Assert.Null(props.GetParameter<int?>("foo"));
            Assert.Equal(0, props.Parameters.Count);

            var list = new string[] { "a", "b", "c" };
            props.SetParameter<ICollection<string>>("foo", list);
            Assert.Equal(new string[] { "a", "b", "c" }, props.GetParameter<ICollection<string>>("foo"));
            Assert.Same(list, props.Parameters["foo"]);
            Assert.Equal(1, props.Parameters.Count);

            props.SetParameter<ICollection<string>>("foo", null);
            Assert.Null(props.GetParameter<ICollection<string>>("foo"));
            Assert.Null(props.Parameters["foo"]);
            Assert.Equal(1, props.Parameters.Count);
        }

        [Fact]
        public void IsPersistent_Test()
        {
            var props = new AuthenticationProperties();
            Assert.False(props.IsPersistent);

            props.IsPersistent = true;
            Assert.True(props.IsPersistent);
            Assert.Equal(string.Empty, props.Items.First().Value);

            props.Items.Clear();
            Assert.False(props.IsPersistent);
        }

        [Fact]
        public void RedirectUri_Test()
        {
            var props = new AuthenticationProperties();
            Assert.Null(props.RedirectUri);

            props.RedirectUri = "http://example.com";
            Assert.Equal("http://example.com", props.RedirectUri);
            Assert.Equal("http://example.com", props.Items.First().Value);

            props.Items.Clear();
            Assert.Null(props.RedirectUri);
        }

        [Fact]
        public void IssuedUtc_Test()
        {
            var props = new AuthenticationProperties();
            Assert.Null(props.IssuedUtc);

            props.IssuedUtc = new DateTimeOffset(new DateTime(2018, 03, 21, 0, 0, 0, DateTimeKind.Utc));
            Assert.Equal(new DateTimeOffset(new DateTime(2018, 03, 21, 0, 0, 0, DateTimeKind.Utc)), props.IssuedUtc);
            Assert.Equal("Wed, 21 Mar 2018 00:00:00 GMT", props.Items.First().Value);

            props.Items.Clear();
            Assert.Null(props.IssuedUtc);
        }

        [Fact]
        public void ExpiresUtc_Test()
        {
            var props = new AuthenticationProperties();
            Assert.Null(props.ExpiresUtc);

            props.ExpiresUtc = new DateTimeOffset(new DateTime(2018, 03, 19, 12, 34, 56, DateTimeKind.Utc));
            Assert.Equal(new DateTimeOffset(new DateTime(2018, 03, 19, 12, 34, 56, DateTimeKind.Utc)), props.ExpiresUtc);
            Assert.Equal("Mon, 19 Mar 2018 12:34:56 GMT", props.Items.First().Value);

            props.Items.Clear();
            Assert.Null(props.ExpiresUtc);
        }

        [Fact]
        public void AllowRefresh_Test()
        {
            var props = new AuthenticationProperties();
            Assert.Null(props.AllowRefresh);

            props.AllowRefresh = true;
            Assert.True(props.AllowRefresh);
            Assert.Equal("True", props.Items.First().Value);

            props.AllowRefresh = false;
            Assert.False(props.AllowRefresh);
            Assert.Equal("False", props.Items.First().Value);

            props.Items.Clear();
            Assert.Null(props.AllowRefresh);
        }
    }
}