// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System.Reflection;
using System.Text.Json;
 
namespace Templates.Test.Helpers;
 
public readonly struct DevelopmentCertificate(string certificatePath, string certificatePassword, string certificateThumbprint)
{
    public readonly string CertificatePath { get; } = certificatePath;
    public readonly string CertificatePassword { get; } = certificatePassword;
    public readonly string CertificateThumbprint { get; } = certificateThumbprint;
 
    public static DevelopmentCertificate Get(Assembly assembly)
    {
        string[] locations = [
            Path.Combine(AppContext.BaseDirectory, "aspnetcore-https.json"),
            Path.Combine(Environment.CurrentDirectory, "aspnetcore-https.json"),
            Path.Combine(AppContext.BaseDirectory, "aspnetcore-https.json"),
        ];
 
        var json = TryGetExistingFile(locations)
            ?? throw new InvalidOperationException($"The aspnetcore-https.json file does not exist. Searched locations: {Environment.NewLine}{string.Join(Environment.NewLine, locations)}");
 
        using var file = File.OpenRead(json);
        var certificateAttributes = JsonSerializer.Deserialize<CertificateAttributes>(file) ??
            throw new InvalidOperationException($"The aspnetcore-https.json file does not contain valid JSON.");
 
        var path = Path.ChangeExtension(json, ".pfx");
 
        if (!File.Exists(path))
        {
            throw new InvalidOperationException($"The certificate file does not exist. Expected at: '{path}'.");
        }
 
        var password = certificateAttributes.Password;
        var thumbprint = certificateAttributes.Thumbprint;
 
        return new DevelopmentCertificate(path, password, thumbprint);
    }
 
    private static string TryGetExistingFile(string[] locations)
    {
        foreach (var location in locations)
        {
            if (File.Exists(location))
            {
                return location;
            }
        }
 
        return null;
    }
 
    private sealed class CertificateAttributes
    {
        public string Password { get; set; }
        public string Thumbprint { get; set; }
    }
}