using System.Security.Claims;
using JobsMedical.Web.Data;
using JobsMedical.Web.Models;
using JobsMedical.Web.Services;
using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.Authentication.Cookies;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.EntityFrameworkCore;

namespace JobsMedical.Web.Pages.Employer;

[Authorize]
public class RegisterFacilityModel : PageModel
{
    private readonly AppDbContext _db;
    private readonly CaptchaService _captcha;
    public RegisterFacilityModel(AppDbContext db, CaptchaService captcha)
    {
        _db = db;
        _captcha = captcha;
    }

    public List<City> Cities { get; private set; } = new();
    public List<District> Districts { get; private set; } = new();
    public string CaptchaQuestion { get; private set; } = "";
    [BindProperty] public string? CaptchaToken { get; set; }
    [BindProperty] public string? CaptchaAnswer { get; set; }

    [BindProperty] public string Name { get; set; } = "";
    [BindProperty] public FacilityType Type { get; set; }
    [BindProperty] public int CityId { get; set; }
    [BindProperty] public int? DistrictId { get; set; }
    [BindProperty] public string? Address { get; set; }
    [BindProperty] public string? Phone { get; set; }
    [BindProperty] public string? BaleId { get; set; }
    [BindProperty] public double? Lat { get; set; }
    [BindProperty] public double? Lng { get; set; }
    public string? Error { get; private set; }

    public async Task OnGetAsync() { await LoadListsAsync(); NewCaptcha(); }

    public async Task<IActionResult> OnPostAsync()
    {
        await LoadListsAsync();
        if (!_captcha.Verify(CaptchaToken, CaptchaAnswer))
        { Error = "پاسخ سؤال امنیتی نادرست است."; NewCaptcha(); return Page(); }
        if (string.IsNullOrWhiteSpace(Name) || CityId == 0)
        {
            Error = "نام مرکز و شهر الزامی است.";
            NewCaptcha();
            return Page();
        }
        if (SubmissionGuard.ContainsSpam(Name))
        { Error = "نام مرکز نامعتبر به‌نظر می‌رسد."; NewCaptcha(); return Page(); }

        var userId = int.Parse(User.FindFirstValue(ClaimTypes.NameIdentifier)!);
        var facility = new Facility
        {
            Name = Name.Trim(),
            Type = Type,
            CityId = CityId,
            DistrictId = DistrictId,
            Address = Address?.Trim(),
            Phone = Phone?.Trim(),
            BaleId = BaleId?.Trim(),
            Lat = Lat,
            Lng = Lng,
            OwnerUserId = userId,
            IsVerified = false, // platform verifies later
        };
        _db.Facilities.Add(facility);

        // Promote the user to FacilityAdmin (keep Admin if already admin) and refresh the cookie.
        var user = await _db.Users.FindAsync(userId);
        if (user is not null && user.Role == UserRole.Doctor)
        {
            user.Role = UserRole.FacilityAdmin;
            await _db.SaveChangesAsync();
            await HttpContext.SignInAsync(CookieAuthenticationDefaults.AuthenticationScheme,
                AuthHelper.BuildPrincipal(user));
        }
        else
        {
            await _db.SaveChangesAsync();
        }

        return RedirectToPage("/Employer/Index");
    }

    private async Task LoadListsAsync()
    {
        Cities = await _db.Cities.OrderByDescending(c => c.IsActive).ThenBy(c => c.Name).ToListAsync();
        Districts = await _db.Districts.Where(d => d.IsActive).OrderBy(d => d.Name).ToListAsync();
    }

    private void NewCaptcha()
    {
        var (q, token) = _captcha.Create();
        CaptchaQuestion = q;
        CaptchaToken = token;
    }
}