using System;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Threading.Tasks;
using contact.Services;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.Extensions.Logging;

namespace contact.Pages
{
    [BindProperties(SupportsGet = true)]
    public class ContactFormModel
    {
        public ContactFormModel()
        {
            DbId = "n/a v7";
        }
        [Required]
        public string Name { get; set; }
        [Required]
        public string Company { get; set; }
        //Optional; AyaNova clients deep-link to this page with their database ID.
        //Binding attributes left exactly as they were so that link keeps working.
        [BindProperty(SupportsGet = true)]
        public string DbId { get; set; }
        [Required, EmailAddress]
        public string Email { get; set; }
        [Required]
        public string Message { get; set; }
    }

    public class ContactModel : PageModel
    {
        private const string ConfirmedUrl = "https://ayanova.com/confirmed.htm";

        //2022-05-06 Company names containing any of these are dropped silently but still get the
        //success redirect, so the spammer gets no signal and has to pay someone to enter them by hand
        public static readonly string[] SpamBlocks = { "google", "jumboleadmagnet", "boostleadgeneration" };

        [BindProperty(SupportsGet = true)]
        public ContactFormModel Contact { get; set; }

        //Set when the send fails, so the page can tell the visitor instead of claiming success
        public bool SendFailed { get; set; }

        private readonly MailSender _mail;
        private readonly ILogger<ContactModel> _logger;

        public ContactModel(MailSender mail, ILogger<ContactModel> logger)
        {
            _mail = mail;
            _logger = logger;
        }

        public void OnGet()
        {
        }

        public async Task<IActionResult> OnPostAsync()
        {
            if (!ModelState.IsValid)
            {
                return Page();
            }

            //2025-11-01 reCAPTCHA removed (Google service change). Replacement deferred, see runbook Phase 6.

            if (IsBlocked(Contact.Company))
            {
                return Redirect(ConfirmedUrl);
            }

            //Email is in the body as well as Reply-To, so it survives even if Reply-To can't be set
            var body = $"Name:\r\n{Contact.Name}\r\n\r\nCompany:\r\n{Contact.Company}\r\n\r\nEmail:\r\n{Contact.Email}\r\n\r\nDatabase Id:\r\n{Contact.DbId}\r\n\r\nMessage:\r\n{Contact.Message}";

            try
            {
                await _mail.SendToSupportAsync($"Question about AyaNova from {Contact.Company}", body, Contact.Name, Contact.Email);
            }
            catch (Exception ex)
            {
                //Log the whole submission so it can be recovered from the journal, not lost
                _logger.LogError(ex, "Contact form send failed. Submission:\r\n{Body}", body);
                SendFailed = true;
                return Page();
            }

            return Redirect(ConfirmedUrl);
        }

        public static bool IsBlocked(string company)
        {
            var c = company.ToLowerInvariant();
            return SpamBlocks.Any(s => c.Contains(s));
        }
    }
}