using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.AspNetCore.Mvc.Rendering;
using ListmonkIntegration.Services;

namespace ListmonkIntegration.Pages.Campaigns
{
    public class SendModel : PageModel
    {
        private readonly IListmonkService _listmonkService;
        private readonly ILogger<SendModel> _logger;

        [BindProperty]
        public string CampaignName { get; set; } = string.Empty;

        [BindProperty]
        public int? SelectedTemplateId { get; set; }

        [BindProperty]
        public int? SelectedListId { get; set; }

        public SelectList Templates { get; set; } = new SelectList(Enumerable.Empty<SelectListItem>());
        public SelectList Lists { get; set; } = new SelectList(Enumerable.Empty<SelectListItem>());

        public string? ErrorMessage { get; set; }
        public string? SuccessMessage { get; set; }

        public SendModel(IListmonkService listmonkService, ILogger<SendModel> logger)
        {
            _listmonkService = listmonkService;
            _logger = logger;
        }

        public async Task OnGetAsync()
        {
            await LoadDataAsync();
        }

        public async Task<IActionResult> OnPostAsync()
        {
            if (!SelectedTemplateId.HasValue || !SelectedListId.HasValue || string.IsNullOrWhiteSpace(CampaignName))
            {
                ErrorMessage = "Заполните все поля";
                await LoadDataAsync();
                return Page();
            }

            try
            {
                var templates = await _listmonkService.GetTemplatesAsync();
                var template = templates.FirstOrDefault(t => t.Id == SelectedTemplateId.Value);

                if (template == null)
                {
                    ErrorMessage = "Шаблон не найден";
                    await LoadDataAsync();
                    return Page();
                }

                var campaignId = await _listmonkService.CreateCampaignAsync(
                    CampaignName,
                    SelectedListId.Value,
                    SelectedTemplateId.Value,
                    template.Subject
                );

                var started = await _listmonkService.StartCampaignAsync(campaignId);

                if (started)
                {
                    SuccessMessage = $"Кампания \"{CampaignName}\" успешно создана и запущена!";
                    _logger.LogInformation($"Campaign {campaignId} started successfully");
                }
                else
                {
                    ErrorMessage = $"Кампания создана (ID: {campaignId}), но не удалось запустить";
                }

                await LoadDataAsync();
                return Page();
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Error sending campaign");
                ErrorMessage = $"Ошибка: {ex.Message}";
                await LoadDataAsync();
                return Page();
            }
        }

        private async Task LoadDataAsync()
        {
            try
            {
                var templates = await _listmonkService.GetTemplatesAsync();
                Templates = new SelectList(templates, "Id", "Name");

                var lists = await _listmonkService.GetListsAsync();
                Lists = new SelectList(lists, "Id", "Name");
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Error loading data");
                ErrorMessage = $"Ошибка загрузки данных: {ex.Message}";
            }
        }
    }
}