// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System.Text.Json.Nodes;
using Aspire.Hosting.Azure;
using Aspire.Hosting.Azure.Provisioning;
using Aspire.Hosting.Utils;
using Microsoft.Extensions.Configuration;
using Xunit;
 
namespace Aspire.Hosting.Tests.Azure;
 
public class AzureBicepProvisionerTests
{
    [Fact]
    public async Task SetParametersTranslatesParametersToARMCompatibleJsonParameters()
    {
        using var builder = TestDistributedApplicationBuilder.Create();
 
        var bicep0 = builder.AddBicepTemplateString("bicep0", "param name string")
               .WithParameter("name", "david");
 
        var parameters = new JsonObject();
        await BicepProvisioner.SetParametersAsync(parameters, bicep0.Resource);
 
        Assert.Single(parameters);
        Assert.Equal("david", parameters["name"]?["value"]?.ToString());
    }
 
    [Fact]
    public async Task SetParametersTranslatesCompatibleParameterTypes()
    {
        using var builder = TestDistributedApplicationBuilder.Create();
 
        var connectionStringResource = builder.CreateResourceBuilder(
            new ResourceWithConnectionString("A", "connection string"));
 
        var param = builder.AddParameter("param", _ => "paramValue");
 
        var bicep0 = builder.AddBicepTemplateString("bicep0", "param name string")
               .WithParameter("name", "john")
               .WithParameter("age", () => 20)
               .WithParameter("values", ["a", "b", "c"])
               .WithParameter("conn", connectionStringResource)
               .WithParameter("jsonObj", new JsonObject { ["key"] = "value" })
               .WithParameter("param", param);
 
        var parameters = new JsonObject();
        await BicepProvisioner.SetParametersAsync(parameters, bicep0.Resource);
 
        Assert.Equal(6, parameters.Count);
        Assert.Equal("john", parameters["name"]?["value"]?.ToString());
        Assert.Equal(20, parameters["age"]?["value"]?.GetValue<int>());
        Assert.Equal(["a", "b", "c"], parameters["values"]?["value"]?.AsArray()?.Select(v => v?.ToString()) ?? []);
        Assert.Equal("connection string", parameters["conn"]?["value"]?.ToString());
        Assert.Equal("value", parameters["jsonObj"]?["value"]?["key"]?.ToString());
        Assert.Equal("paramValue", parameters["param"]?["value"]?.ToString());
    }
 
    [Fact]
    public async Task ResourceWithTheSameBicepTemplateAndParametersHaveTheSameCheckSum()
    {
        using var builder = TestDistributedApplicationBuilder.Create();
 
        var bicep0 = builder.AddBicepTemplateString("bicep0", "param name string")
                       .WithParameter("name", "david")
                       .WithParameter("age", () => 20)
                       .WithParameter("values", ["a", "b", "c"])
                       .WithParameter("jsonObj", new JsonObject { ["key"] = "value" });
 
        var bicep1 = builder.AddBicepTemplateString("bicep1", "param name string")
                       .WithParameter("name", "david")
                       .WithParameter("age", () => 20)
                       .WithParameter("values", ["a", "b", "c"])
                       .WithParameter("jsonObj", new JsonObject { ["key"] = "value" });
 
        var parameters0 = new JsonObject();
        await BicepProvisioner.SetParametersAsync(parameters0, bicep0.Resource);
        var checkSum0 = BicepProvisioner.GetChecksum(bicep0.Resource, parameters0);
 
        var parameters1 = new JsonObject();
        await BicepProvisioner.SetParametersAsync(parameters1, bicep1.Resource);
        var checkSum1 = BicepProvisioner.GetChecksum(bicep1.Resource, parameters1);
 
        Assert.Equal(checkSum0, checkSum1);
    }
 
    [Theory]
    [InlineData("1alpha")]
    [InlineData("-alpha")]
    [InlineData("")]
    [InlineData(" alpha")]
    [InlineData("alpha 123")]
    public void WithParameterDoesNotAllowParameterNamesWhichAreInvalidBicepIdentifiers(string bicepParameterName)
    {
        var ex = Assert.Throws<ArgumentException>(() =>
        {
            using var builder = TestDistributedApplicationBuilder.Create();
            builder.AddAzureConstruct("construct", _ => { })
                   .WithParameter(bicepParameterName);
        });
 
        Assert.Equal("Bicep parameter names must only contain alpha, numeric, and _ characters and must start with an alpha or _ characters. (Parameter 'bicepParameterName')", ex.Message);
    }
 
    [Theory]
    [InlineData("alpha")]
    [InlineData("a1pha")]
    [InlineData("_alpha")]
    [InlineData("__alpha")]
    [InlineData("alpha1_")]
    [InlineData("Alpha1_A")]
    public void WithParameterAllowsParameterNamesWhichAreValidBicepIdentifiers(string bicepParameterName)
    {
        using var builder = TestDistributedApplicationBuilder.Create();
        builder.AddAzureConstruct("construct", _ => { })
                .WithParameter(bicepParameterName);
    }
 
    [Fact]
    public async Task ResourceWithSameTemplateButDifferentParametersHaveDifferentChecksums()
    {
        using var builder = TestDistributedApplicationBuilder.Create();
 
        var bicep0 = builder.AddBicepTemplateString("bicep0", "param name string")
                       .WithParameter("name", "david")
                       .WithParameter("age", () => 20)
                       .WithParameter("values", ["a", "b", "c"]);
 
        var bicep1 = builder.AddBicepTemplateString("bicep1", "param name string")
                       .WithParameter("name", "david")
                       .WithParameter("age", () => 20)
                       .WithParameter("values", ["a", "b", "c"])
                       .WithParameter("jsonObj", new JsonObject { ["key"] = "value" });
 
        var parameters0 = new JsonObject();
        await BicepProvisioner.SetParametersAsync(parameters0, bicep0.Resource);
        var checkSum0 = BicepProvisioner.GetChecksum(bicep0.Resource, parameters0);
 
        var parameters1 = new JsonObject();
        await BicepProvisioner.SetParametersAsync(parameters1, bicep1.Resource);
        var checkSum1 = BicepProvisioner.GetChecksum(bicep1.Resource, parameters1);
 
        Assert.NotEqual(checkSum0, checkSum1);
    }
 
    [Fact]
    public async Task GetCurrentChecksumSkipsKnownValuesForCheckSumCreation()
    {
        using var builder = TestDistributedApplicationBuilder.Create();
 
        var bicep0 = builder.AddBicepTemplateString("bicep0", "param name string")
                       .WithParameter("name", "david")
                       .WithParameter(AzureBicepResource.KnownParameters.KeyVaultName);
 
        // Simulate the case where a known parameter has a value
        var bicep1 = builder.AddBicepTemplateString("bicep1", "param name string")
                       .WithParameter("name", "david")
                       .WithParameter(AzureBicepResource.KnownParameters.KeyVaultName, "blah")
                       .WithParameter(AzureBicepResource.KnownParameters.PrincipalId, "id")
                       .WithParameter(AzureBicepResource.KnownParameters.Location, "tomorrow")
                       .WithParameter(AzureBicepResource.KnownParameters.PrincipalType, "type");
 
        var parameters0 = new JsonObject();
        await BicepProvisioner.SetParametersAsync(parameters0, bicep0.Resource);
        var checkSum0 = BicepProvisioner.GetChecksum(bicep0.Resource, parameters0);
 
        // Save the old version of this resource's parameters to config
        var config = new ConfigurationManager();
        config["Parameters"] = parameters0.ToJsonString();
 
        var checkSum1 = await BicepProvisioner.GetCurrentChecksumAsync(bicep1.Resource, config);
 
        Assert.Equal(checkSum0, checkSum1);
    }
 
    private sealed class ResourceWithConnectionString(string name, string connectionString) :
        Resource(name),
        IResourceWithConnectionString
    {
        public ReferenceExpression ConnectionStringExpression =>
           ReferenceExpression.Create($"{connectionString}");
    }
}