using System.ComponentModel.DataAnnotations;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.AspNetCore.Mvc.Rendering;
using plushealthtech.Mail;

namespace plushealthtech.Pages
{
    public class RequestDemoModel : PageModel
    {
        private readonly MailSender _mailSender;
        private readonly ILogger<RequestDemoModel> _logger;

        public RequestDemoModel(MailSender mailSender, ILogger<RequestDemoModel> logger)
        {
            _mailSender = mailSender;
            _logger = logger;
        }

        [BindProperty]
        [Required]
        [StringLength(200)]
        public string Name { get; set; } = string.Empty;

        [BindProperty]
        [Required]
        [EmailAddress]
        [StringLength(320)]
        public string Email { get; set; } = string.Empty;

        [BindProperty]
        [Required]
        [StringLength(200)]
        public string Organization { get; set; } = string.Empty;

        [BindProperty]
        public string? PracticeType { get; set; }

        [BindProperty]
        public string? ProductsOfInterest { get; set; }

        [BindProperty]
        [StringLength(5000)]
        public string? Message { get; set; }

        public List<SelectListItem> PracticeTypeOptions { get; } = new()
        {
            new SelectListItem { Value = string.Empty, Text = "Select a practice type…", Selected = true },
            new SelectListItem { Value = "Healthcare system", Text = "Healthcare system" },
            new SelectListItem { Value = "Hospital", Text = "Hospital" },
            new SelectListItem { Value = "Clinic", Text = "Clinic" },
            new SelectListItem { Value = "Veterinary practice", Text = "Veterinary practice" },
            new SelectListItem { Value = "Other", Text = "Other" },
        };

        public List<SelectListItem> ProductsOfInterestOptions { get; } = new()
        {
            new SelectListItem { Value = string.Empty, Text = "Select a product area…", Selected = true },
            new SelectListItem { Value = "Clinical Decision Support", Text = "Clinical Decision Support" },
            new SelectListItem { Value = "Patient Management", Text = "Patient Management" },
            new SelectListItem { Value = "Veterinary Solutions", Text = "Veterinary Solutions" },
            new SelectListItem { Value = "Multiple / not sure", Text = "Multiple / not sure" },
        };

        public string? Success { get; set; }

        public string? Error { get; set; }

        public void OnGet()
        {
            Success = null;
            Error = null;
        }

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

            var lines = new List<string>
            {
                $"Name: {Name}",
                $"Email: {Email}",
                $"Organization: {Organization}"
            };

            if (!string.IsNullOrWhiteSpace(PracticeType))
            {
                lines.Add($"Practice type: {PracticeType}");
            }

            if (!string.IsNullOrWhiteSpace(ProductsOfInterest))
            {
                lines.Add($"Products of interest: {ProductsOfInterest}");
            }

            if (!string.IsNullOrWhiteSpace(Message))
            {
                lines.Add(string.Empty);
                lines.Add(Message);
            }

            try
            {
                await _mailSender.SendAsync($"New demo request — {Organization}", string.Join("\n", lines));
                Success = $"Thanks — your demo request has been sent. We'll reach out to {Email}.";
            }
            catch (Exception ex)
            {
                // Log the full exception; never surface SMTP details to the user.
                _logger.LogError(ex, "Failed to send demo request from {Email} ({Organization})", Email, Organization);
                Error = "Your request could not be sent right now. Please try again or email us directly.";
            }

            return Page();
        }
    }
}