using BTCPayServer.Models;
using BTCPayServer.Models.ServerViewModels;
using BTCPayServer.Services;
using BTCPayServer.Services.Mails;
using BTCPayServer.Validations;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Mvc;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Net;
using System.Net.Mail;
using System.Threading.Tasks;

namespace BTCPayServer.Controllers
{
	[Authorize(Roles = Roles.ServerAdmin)]
	public class ServerController : Controller
	{
		private UserManager<ApplicationUser> _UserManager;
		SettingsRepository _SettingsRepository;

		public ServerController(UserManager<ApplicationUser> userManager, SettingsRepository settingsRepository)
		{
			_UserManager = userManager;
			_SettingsRepository = settingsRepository;
		}

		[Route("server/users")]
		public IActionResult ListUsers()
		{
			var users = new UsersViewModel();
			users.Users
				= _UserManager.Users.Select(u => new UsersViewModel.UserViewModel()
				{
					Name = u.UserName,
					Email = u.Email
				}).ToList();
			return View(users);
		}

		[Route("server/emails")]
		public async Task<IActionResult> Emails()
		{
			var data = (await _SettingsRepository.GetSettingAsync<EmailSettings>()) ?? new EmailSettings();
			return View(new EmailsViewModel() { Settings = data });
		}

		[Route("server/policies")]
		public async Task<IActionResult> Policies()
		{
			var data = (await _SettingsRepository.GetSettingAsync<PoliciesSettings>()) ?? new PoliciesSettings();
			return View(data);
		}
		[Route("server/policies")]
		[HttpPost]
		public async Task<IActionResult> Policies(PoliciesSettings settings)
		{
			await _SettingsRepository.UpdateSetting(settings);
			TempData["StatusMessage"] = "Policies upadated successfully";
			return View(settings);
		}

		[Route("server/emails")]
		[HttpPost]
		public async Task<IActionResult> Emails(EmailsViewModel model, string command)
		{
			if(command == "Test")
			{
				if(!ModelState.IsValid)
					return View(model);
				try
				{
					var client = model.Settings.CreateSmtpClient();
					await client.SendMailAsync(model.Settings.From, model.TestEmail, "BTCPay test", "BTCPay test");
					model.StatusMessage = "Email sent to " + model.TestEmail + ", please, verify you received it";
				}
				catch(Exception ex)
				{
					model.StatusMessage = "Error: " + ex.Message;
				}
				return View(model);
			}
			else
			{
				ModelState.Remove(nameof(model.TestEmail));
				if(!ModelState.IsValid)
					return View(model);
				await _SettingsRepository.UpdateSetting(model.Settings);
				model.StatusMessage = "Email settings saved";
				return View(model);
			}
		}
	}
}