using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Rendering;
using MVC_SimpleCRUD_Layered.Application.Models;
using MVC_SimpleCRUD_Layered.Application.People;

namespace MVC_SimpleCRUD_Layered.Web.Controllers;

public class PeopleController : Controller
{
  private readonly IPeopleService peopleService;

  public PeopleController(IPeopleService peopleService)
  {
    this.peopleService = peopleService;
  }

  public async Task<IActionResult> Index(int page = 1, int pageSize = 0, string? sorts = null, string? searchText = null)
  {
    PagedList<PersonInfo> model = await peopleService.GetPagedListAsync(new PeopleIndexRequest
    {
      Page = page,
      PageSize = pageSize,
      Sorts = sorts,
      SearchText = searchText
    });

    return View(model);
  }

  [HttpGet]
  public async Task<IActionResult> Create(int page = 1, int pageSize = 0, string? sorts = null, string? searchText = null)
  {
    var model = new PersonForm
    {
      Page = page,
      PageSize = pageSize,
      Sorts = sorts,
      SearchText = searchText
    };

    await PrepareDropDownLists(model.CountryCode);
    return View(model);
  }

  [HttpPost]
  [ValidateAntiForgeryToken]
  public async Task<IActionResult> Create(PersonForm model)
  {
    if (!ModelState.IsValid)
    {
      await PrepareDropDownLists(model.CountryCode);
      return View(model);
    }

    var result = await peopleService.CreateAsync(model);
    if (result.Success)
    {
      ShowToast($"Person {result.PersonName} added.");
      return RedirectToIndex(model);
    }

    ModelState.AddModelError(string.Empty, result.ErrorMessage ?? "Person could not be saved.");
    await PrepareDropDownLists(model.CountryCode);
    return View(model);
  }

  [HttpGet]
  public async Task<IActionResult> Edit(int id, int page = 1, int pageSize = 0, string? sorts = null, string? searchText = null)
  {
    var model = await peopleService.GetFormForEditAsync(id, new PeopleIndexRequest
    {
      Page = page,
      PageSize = pageSize,
      Sorts = sorts,
      SearchText = searchText
    });

    if (model is null)
    {
      ShowToast($"Person with id {id} was not found.", Constants.ToastVariants.Danger, Constants.ToastTitles.Error);
      return RedirectToAction(nameof(Index), new { page, pageSize, sorts, searchText });
    }

    await PrepareDropDownLists(model.CountryCode);
    return View(model);
  }

  [HttpPost]
  [ValidateAntiForgeryToken]
  public async Task<IActionResult> Edit(int id, PersonForm model)
  {
    if (model.Id != id)
    {
      return BadRequest();
    }

    if (!ModelState.IsValid)
    {
      await PrepareDropDownLists(model.CountryCode);
      return View(model);
    }

    var result = await peopleService.UpdateAsync(id, model);
    if (result.Success)
    {
      ShowToast($"Person {result.PersonName} updated.");
      return RedirectToIndex(model);
    }

    if (string.Equals(result.ErrorMessage, $"Person with id {id} was not found.", StringComparison.Ordinal))
    {
      ShowToast(result.ErrorMessage!, Constants.ToastVariants.Danger, Constants.ToastTitles.Error);
      return RedirectToIndex(model);
    }

    ModelState.AddModelError(string.Empty, result.ErrorMessage ?? "Person could not be saved.");
    await PrepareDropDownLists(model.CountryCode);
    return View(model);
  }

  [HttpPost]
  [ValidateAntiForgeryToken]
  public async Task<IActionResult> Delete(int id, int page = 1, int pageSize = 0, string? sorts = null, string? searchText = null)
  {
    var result = await peopleService.DeleteAsync(id);

    if (!result.Found)
    {
      ShowToast($"Person with id {id} was not found.", Constants.ToastVariants.Danger, Constants.ToastTitles.Error);
      return RedirectToAction(nameof(Index), new { page, pageSize, sorts, searchText });
    }

    if (result.Success)
    {
      ShowToast($"Person {result.PersonName} deleted.");
    }
    else
    {
      ShowToast($"Person {result.PersonName} could not be deleted. {result.ErrorMessage}", Constants.ToastVariants.Danger, Constants.ToastTitles.Error);
    }

    return RedirectToAction(nameof(Index), new { page, pageSize, sorts, searchText });
  }

  private async Task PrepareDropDownLists(string? selectedCountryCode = null)
  {
    var countries = await peopleService.GetCountryOptionsAsync();
    ViewBag.Countries = new SelectList(countries, nameof(CountryOption.Code), nameof(CountryOption.Name), selectedCountryCode);
  }

  private RedirectToActionResult RedirectToIndex(PersonForm model)
  {
    return RedirectToAction(nameof(Index), new
    {
      page = model.Page,
      pageSize = model.PageSize,
      sorts = model.Sorts,
      searchText = model.SearchText
    });
  }

  private void ShowToast(string message, string variant = Constants.ToastVariants.Success, string title = Constants.ToastTitles.Notification)
  {
    TempData[Constants.TempDataKeys.ToastMessage] = message;
    TempData[Constants.TempDataKeys.ToastVariant] = variant;
    TempData[Constants.TempDataKeys.ToastTitle] = title;
  }
}