using Microsoft.VisualStudio.TestTools.UnitTesting;
using Moq;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using Tests;
using Microsoft.Extensions.Configuration;
using Core.Configurations.SmartConfiguration;

namespace Configuration.Core.Tests;

[TestClass]
public class ConfigurationTests : TestFixture
{
    private Mock<IConfigurationRepository> _mockRepo;
    private KeyValueConfigurationBuilder _builder;

    [TestInitialize]
    public void Init()
    {
        _mockRepo = new Mock<IConfigurationRepository>();
        _builder = new KeyValueConfigurationBuilder(_mockRepo.Object);
    }

    [TestMethod]
    public async Task LoadConfiguration_WithValidData_BuildsCorrectly()
    {
        // Arrange
        var configurations = new List<AppConfiguration>
        {
            new AppConfiguration
            {
                Key = "Email:Templates:Welcome",
                Value = @"{""subject"":""Welcome"",""sender"":""test@company.com""}",
                ValidFrom = DateTime.UtcNow.AddDays(-1),
                ExpiresAt = DateTime.UtcNow.AddDays(1)
            }
        };

        _mockRepo.Setup(r => r.GetActiveConfigurations())
            .ReturnsAsync(configurations);

        // Act
        await _builder.LoadConfiguration();
        var config = _builder.Build();

        // Assert
        Assert.IsNotNull(config);
        Assert.AreEqual("Welcome", config["Email:Templates:Welcome:subject"]);
    }

    [TestMethod]
    public async Task LoadConfiguration_WithExpiredData_NotIncluded()
    {
        // Arrange
        var configurations = new List<AppConfiguration>
        {
            new AppConfiguration
            {
                Key = "Test:Key",
                Value = @"{""value"":""test""}",
                ValidFrom = DateTime.UtcNow.AddDays(1),
                ExpiresAt = DateTime.UtcNow.AddDays(2)
            }
        };

        _mockRepo.Setup(r => r.GetActiveConfigurations())
            .ReturnsAsync(new List<AppConfiguration>());

        // Act
        await _builder.LoadConfiguration();
        var config = _builder.Build();

        // Assert
        Assert.IsNull(config["Test:Key:value"]);
    }

    [TestMethod]
    public void AddKeyValue_WithNestedKeys_BuildsCorrectHierarchy()
    {
        // Arrange
        var key = "Level1:Level2:Level3";
        var value = @"{""setting"":""value""}";

        // Act
        _builder.AddKeyValue(key, value);
        var config = _builder.Build();

        // Assert
        Assert.AreEqual("value", config["Level1:Level2:Level3:setting"]);
    }

    [TestMethod]
    public async Task GetSection_ReturnsCorrectSubSection()
    {
        // Arrange
        var configurations = new List<AppConfiguration>
        {
            new AppConfiguration
            {
                Key = "Parent:Child",
                Value = @"{""setting"":""value""}",
                ValidFrom = DateTime.UtcNow.AddDays(-1)
            }
        };

        _mockRepo.Setup(r => r.GetActiveConfigurations())
            .ReturnsAsync(configurations);

        // Act
        await _builder.LoadConfiguration();
        var config = _builder.Build();
        var section = config.GetSection("Parent");

        // Assert
        Assert.AreEqual("value", section["Child:setting"]);
    }

    [TestMethod]
    public void Configuration_ShouldMapToTypedClass()
    {
        // Arrange
        var configData = new JObject
        {
            ["Email"] = new JObject
            {
                ["Templates"] = new JObject
                {
                    ["Welcome"] = new JObject
                    {
                        ["subject"] = "Welcome to our service",
                        ["template"] = "welcome-template.html",
                        ["sender"] = "noreply@test.com",
                        ["settings"] = new JObject
                        {
                            ["isEnabled"] = true,
                            ["retryCount"] = 3
                        }
                    }
                }
            }
        };

		IConfiguration configuration = new JsonConfiguration(configData, new Microsoft.Extensions.Configuration.ConfigurationReloadToken());

        // Act
        var welcomeConfig = configuration.GetSection("Email:Templates:Welcome").Get<WelcomeEmailConfig>();

        // Assert
        Assert.IsNotNull(welcomeConfig);
        Assert.AreEqual("Welcome to our service", welcomeConfig.Subject);
        Assert.AreEqual("welcome-template.html", welcomeConfig.Template);
        Assert.AreEqual("noreply@test.com", welcomeConfig.Sender);
        Assert.IsTrue(welcomeConfig.Settings.IsEnabled);
        Assert.AreEqual(3, welcomeConfig.Settings.RetryCount);
    }

    public class WelcomeEmailConfig
    {
        public string Subject { get; set; }
        public string Template { get; set; }
        public string Sender { get; set; }
        public EmailSettings Settings { get; set; }
    }

    public class EmailSettings
    {
        public bool IsEnabled { get; set; }
        public int RetryCount { get; set; }
    }
}