using MongoDB.Entities;

using PrivaPub.ClientModels;
using PrivaPub.Models.User;

namespace PrivaPub.Infrastructure.Cli
{
	public static class AdminCommands
	{
		const string Usage = "usage: PrivaPub admin promote|demote <root username>";

		public static async Task<int> Run(string[] args)
		{
			if (args is not [("promote" or "demote") and var verb, var userName])
			{
				Console.Error.WriteLine(Usage);
				return 2;
			}

			userName = userName.ToLowerInvariant();
			var user = await DB.Default.Find<RootUser>().Match(u => u.UserName == userName).ExecuteFirstAsync();
			if (user == default)
			{
				Console.Error.WriteLine($"no root user '{userName}'");
				return 1;
			}

			user.Policies.RemoveAll(p => p is Policies.IsAdmin or Policies.IsModerator);
			if (verb == "promote")
				user.Policies.AddRange(new[] { Policies.IsAdmin, Policies.IsModerator });
			if (!user.Policies.Contains(Policies.IsUser))
				user.Policies.Add(Policies.IsUser);
			user.UpdatedAt = DateTime.UtcNow;
			await DB.Default.SaveAsync(user);

			Console.WriteLine($"{userName}: {string.Join(", ", user.Policies)}");
			return 0;
		}
	}
}