using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using System.Linq;
using System.Threading.Tasks;
using vita_asistente.Data;
using vita_asistente.Models;

namespace vita_asistente.Controllers
{
    [Authorize]
    public class PacientesController : Controller
    {
        private readonly ApplicationDbContext _context;

        public PacientesController(ApplicationDbContext context)
        {
            _context = context;
        }

        // GET: Pacientes
        public async Task<IActionResult> Index(string nombreBusqueda)
        {
            var pacientes = _context.Pacientes.AsNoTracking();

            if (!string.IsNullOrWhiteSpace(nombreBusqueda))
            {
                pacientes = pacientes.Where(p =>
                    (p.FirstName + " " + p.LastName).Contains(nombreBusqueda.Trim()) ||
                    p.DocumentNumber.Contains(nombreBusqueda.Trim()));
            }

            ViewBag.NombreBusqueda = nombreBusqueda;
            return View(await pacientes.OrderByDescending(p => p.CreatedAt).ToListAsync());
        }

        // GET: Pacientes/Details/5
        public async Task<IActionResult> Details(string id)
        {
            if (id == null) return NotFound();
            var paciente = await _context.Pacientes.FindAsync(id);
            if (paciente == null) return NotFound();
            return View(paciente);
        }

        // GET: Pacientes/Create
        public IActionResult Create()
        {
            return View();
        }

        // POST: Pacientes/Create
        [HttpPost]
        [ValidateAntiForgeryToken]
        public async Task<IActionResult> Create(Pacientes paciente)
        {
            if (string.IsNullOrEmpty(paciente.Id))
            {
                paciente.Id = Guid.NewGuid().ToString("N");
                if (ModelState.ContainsKey("Id"))
                    ModelState.Remove("Id");
            }
            paciente.AllergiesDescription ??= string.Empty;
            if (ModelState.ContainsKey("AllergiesDescription") &&
                ModelState["AllergiesDescription"].Errors.Any(e => e.ErrorMessage.Contains("required")))
            {
                ModelState.Remove("AllergiesDescription");
            }
            if (ModelState.IsValid)
            {
                _context.Add(paciente);
                await _context.SaveChangesAsync();

                if (Request.Headers["Accept"].Contains("application/json"))
                {
                    return Json(new
                    {
                        success = true,
                        data = new
                        {
                            id = paciente.Id,
                            documentType = paciente.DocumentType,
                            documentNumber = paciente.DocumentNumber,
                            firstName = paciente.FirstName,
                            lastName = paciente.LastName,
                            email = paciente.Email,
                            birthDate = paciente.BirthDate?.ToString("yyyy-MM-dd"),
                            address = paciente.Address,
                            phone = paciente.Phone,
                            emergencyContactName = paciente.EmergencyContactName,
                            emergencyContactPhone = paciente.EmergencyContactPhone,
                            bloodType = paciente.BloodType,
                            allergiesDescription = paciente.AllergiesDescription,
                            hasMedicationAllergies = paciente.HasMedicationAllergies,
                            isActive = paciente.IsActive,
                            createdAt = paciente.CreatedAt.ToString("yyyy-MM-dd HH:mm:ss")
                        }
                    });
                }

                return RedirectToAction(nameof(Index));
            }
            if (Request.Headers["Accept"].Contains("application/json"))
            {
                var errorDict = new Dictionary<string, string[]>();
                foreach (var key in ModelState.Keys)
                {
                    var errors = ModelState[key]?.Errors;
                    if (errors != null && errors.Any())
                    {
                        errorDict.Add(key, errors.Select(e => e.ErrorMessage).ToArray());
                    }
                }
                return BadRequest(new { success = false, errors = errorDict });
            }
            return View(paciente);
        }

        // GET: Pacientes/Edit/5
        public async Task<IActionResult> Edit(string id)
        {
            if (id == null) return NotFound();
            var paciente = await _context.Pacientes.FindAsync(id);
            if (paciente == null) return NotFound();
            return View(paciente);
        }

        // POST: Pacientes/Edit/5
        [HttpPost]
        [ValidateAntiForgeryToken]
        public async Task<IActionResult> Edit(string id, Pacientes paciente)
        {
            if (id != paciente.Id) return NotFound();
            paciente.Id = id;
            paciente.AllergiesDescription ??= string.Empty;
            if (ModelState.ContainsKey("AllergiesDescription") &&
                ModelState["AllergiesDescription"].Errors.Any(e => e.ErrorMessage.Contains("required")))
            {
                ModelState.Remove("AllergiesDescription");
            }
            if (ModelState.IsValid)
            {
                try
                {
                    _context.Update(paciente);
                    await _context.SaveChangesAsync();

                    if (Request.Headers["Accept"].Contains("application/json"))
                    {
                        return Json(new
                        {
                            success = true,
                            data = new
                            {
                                id = paciente.Id,
                                documentType = paciente.DocumentType,
                                documentNumber = paciente.DocumentNumber,
                                firstName = paciente.FirstName,
                                lastName = paciente.LastName,
                                email = paciente.Email,
                                birthDate = paciente.BirthDate?.ToString("yyyy-MM-dd"),
                                address = paciente.Address,
                                phone = paciente.Phone,
                                emergencyContactName = paciente.EmergencyContactName,
                                emergencyContactPhone = paciente.EmergencyContactPhone,
                                bloodType = paciente.BloodType,
                                allergiesDescription = paciente.AllergiesDescription,
                                hasMedicationAllergies = paciente.HasMedicationAllergies,
                                isActive = paciente.IsActive,
                                createdAt = paciente.CreatedAt.ToString("yyyy-MM-dd HH:mm:ss")
                            }
                        });
                    }
                    return RedirectToAction(nameof(Index));
                }
                catch (DbUpdateConcurrencyException)
                {
                    if (!PacienteExists(paciente.Id)) return NotFound();
                    throw;
                }
            }
            if (Request.Headers["Accept"].Contains("application/json"))
            {
                var errorDict = new Dictionary<string, string[]>();
                foreach (var key in ModelState.Keys)
                {
                    var errors = ModelState[key]?.Errors;
                    if (errors != null && errors.Any())
                    {
                        errorDict.Add(key, errors.Select(e => e.ErrorMessage).ToArray());
                    }
                }
                return BadRequest(new { success = false, errors = errorDict });
            }
            return View(paciente);
        }

        // GET: Pacientes/Delete/5
        public async Task<IActionResult> Delete(string id)
        {
            if (id == null) return NotFound();
            var paciente = await _context.Pacientes.FindAsync(id);
            if (paciente == null) return NotFound();
            return View(paciente);
        }

        // POST: Pacientes/Delete/5
        [HttpPost, ActionName("Delete")]
        [ValidateAntiForgeryToken]
        public async Task<IActionResult> DeleteConfirmed(string id)
        {
            var paciente = await _context.Pacientes.FindAsync(id);
            if (paciente != null)
            {
                _context.Pacientes.Remove(paciente);
                await _context.SaveChangesAsync();
            }

            if (Request.Headers["Accept"].Contains("application/json"))
            {
                return Json(new { success = true });
            }
            return RedirectToAction(nameof(Index));
        }

        // POST: Pacientes/Activate/5
        [HttpPost]
        [Authorize(Roles = "Admin")]
        [ValidateAntiForgeryToken]
        public async Task<IActionResult> Activate(string id)
        {
            var paciente = await _context.Pacientes.FindAsync(id);
            if (paciente == null) return NotFound();

            paciente.IsActive = true;
            _context.Pacientes.Update(paciente);
            await _context.SaveChangesAsync();

            return RedirectToAction(nameof(Index));
        }

        // POST: Pacientes/Disable/5
        [HttpPost]
        [Authorize(Roles = "Admin")]
        [ValidateAntiForgeryToken]
        public async Task<IActionResult> Disable(string id)
        {
            var paciente = await _context.Pacientes.FindAsync(id);
            if (paciente == null) return NotFound();

            paciente.IsActive = false;
            _context.Pacientes.Update(paciente);
            await _context.SaveChangesAsync();

            return RedirectToAction(nameof(Index));
        }

        private bool PacienteExists(string id)
        {
            return _context.Pacientes.Any(e => e.Id == id);
        }
    }
}