using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Localization;

using PrivaPub.ClientModels;
using PrivaPub.ClientModels.User;
using PrivaPub.Extensions;
using PrivaPub.Resources;
using PrivaPub.Services;

using System.ComponentModel.DataAnnotations;

namespace PrivaPub.Controllers.ClientToServer
{
	[ApiController,
		Route("clientapi/admin")]
	public class AdminController : ControllerBase
	{
		readonly IRootUsersService RootUsersService;
		readonly ILogger<RootUserController> Logger;
		readonly IStringLocalizer Localizer;

		public AdminController(ILogger<RootUserController> logger,
				IStringLocalizer<GenericRes> localizer,
				IRootUsersService rootUsersService)
		{
			Logger = logger;
			Localizer = localizer;
			RootUsersService = rootUsersService;
		}

		// an administrator never removes, bans or unbans itself; the request's own list is left as it came
		UsersIds Others(UsersIds usersIds)
		{
			var selfId = User.GetUserId();
			return new UsersIds { UserIdList = usersIds.UserIdList.Where(id => id != selfId).ToList() };
		}

		[HttpDelete, Route("/clientapi/admin/remove/users"), Authorize(Policy = Policies.IsAdmin)]
		public async Task<IActionResult> RemoveUsers([Required] UsersIds usersIds)
		{
			var result = new WebResult();
			try
			{
				result = await RootUsersService.RemoveUserAsync(Others(usersIds));
				if (!result.IsValid)
					return StatusCode(result.StatusCode, result);

				return Ok();
			}
			catch (Exception ex)
			{
				Logger.LogError(ex, $"{nameof(User)}.{nameof(RemoveUsers)}()");
				return BadRequest(result.Invalidate(Localizer["Something went wrong."]));
			}
		}

		[HttpPost, Authorize(Policy = Policies.IsAdmin), Route("/clientapi/admin/ban/users")]
		public async Task<IActionResult> BanUsers([Required] UsersIds usersIds)
		{
			if (!ModelState.IsValid)
				return BadRequest(usersIds);
			var result = new WebResult();
			try
			{
				result = await RootUsersService.BanUserAsync(Others(usersIds));

				if (!result.IsValid)
					return StatusCode(result.StatusCode, result);

				return Ok();
			}
			catch (Exception ex)
			{
				Logger.LogError(ex, $"{nameof(User)}.{nameof(BanUsers)}()");
				return BadRequest(result.Invalidate(Localizer["Something went wrong."]));
			}
		}

		[HttpPost, Authorize(Policy = Policies.IsAdmin), Route("/clientapi/admin/unban/users")]
		public async Task<IActionResult> UnbanUsers([Required] UsersIds usersIds)
		{
			if (!ModelState.IsValid)
				return BadRequest(usersIds);
			var result = new WebResult();
			try
			{
				result = await RootUsersService.UnbanUserAsync(Others(usersIds));
				if (!result.IsValid)
					return StatusCode(result.StatusCode, result);

				return Ok();
			}
			catch (Exception ex)
			{
				Logger.LogError(ex, $"{nameof(User)}.{nameof(UnbanUsers)}()");
				return BadRequest(result.Invalidate(Localizer["Something went wrong."]));
			}
		}
	}
}