using Microsoft.AspNetCore.Http;
using System;
using System.Linq;

namespace Mirea.Api.Endpoint.Common.Services;

public static class UrlHelper
{
    public static string CurrentDomain(HttpContext context) =>
        context.Request.Headers["X-Forwarded-Host"].FirstOrDefault() ?? context.Request.Host.Host;

    private static string CreateSubPath(string? path)
    {
        if (string.IsNullOrEmpty(path))
            return "/";

        return "/" + path.Trim('/') + "/";
    }

    public static string GetSubPath => CreateSubPath(Environment.GetEnvironmentVariable("ACTUAL_SUB_PATH"));

    public static string GetSubPathWithoutFirstApiName
    {
        get
        {
            var path = GetSubPath;

            if (string.IsNullOrEmpty(path) || path == "/")
                return CreateSubPath(null);

            var parts = path.Split('/', StringSplitOptions.RemoveEmptyEntries);

            for (int i = 0; i < parts.Length; i++)
            {
                if (!parts[i].Equals("api", StringComparison.CurrentCultureIgnoreCase)) continue;

                parts = parts.Take(i).Concat(parts.Skip(i + 1)).ToArray();
                break;
            }

            return CreateSubPath(string.Join("/", parts));
        }
    }

    public static string GetSubPathSwagger => CreateSubPath(Environment.GetEnvironmentVariable("SWAGGER_SUB_PATH"));
}