namespace GrossesMitainesAPI.Controllers;

#region Dependencies
using GrossesMitainesAPI.Models;
using System.Linq;
using GrossesMitainesAPI.Data;
using Microsoft.Extensions.Logging;
using Microsoft.AspNetCore.Authorization;
using Microsoft.EntityFrameworkCore;
using Microsoft.AspNetCore.Cors;
using Microsoft.AspNetCore.Mvc;
using GrossesMitainesAPI.Services;

#endregion

/// <summary>
/// Ce contrôleur ne va pas chercher dans la cache,
/// mais les changements dans celui-ci entrainera
/// une demande de mise à jour dans cette dernière 
/// qui sera effectuée dans les 10 secondes après
/// l'éxécution d'une modification de la BD.
/// </summary>
[EnableCors("_myAllowSpecificOrigins"), ApiController, Route("api/[controller]"),
 Authorize(AuthenticationSchemes = "Identity.Application")]
public class ProductController : ControllerBase {
    #region DI Fields
    private readonly ILogger<ProductController> _logger;
    private readonly InventoryContext _context;
    private readonly DatabaseCacheService _cache;
    private readonly IWebHostEnvironment _hostEnvironment;

    #endregion

    #region Ctor
    public ProductController(ILogger<ProductController> logger, InventoryContext context, DatabaseCacheService cache, IWebHostEnvironment hostEnvironment) {
        _logger = logger;
        _context = context;
        _cache = cache;
        _hostEnvironment = hostEnvironment;
    }

    #endregion

    #region API Methods
    [EnableCors("_myAllowSpecificOrigins"), HttpGet(Name = "Product"), AllowAnonymous]
    public ActionResult<ProductViewModel> Get(int id) {
        Product prod;
        try {
            prod = _context.Products.Where(x => x.Id == id).First();
        }
        catch (Exception e) {
            _logger.LogError(8, e.Message);
            return NotFound();
        }
        _cache.addHit((uint)id);
        return new ProductViewModel(prod);
    }

    [EnableCors("_myAllowSpecificOrigins"), HttpPost(Name = "Product")]
    public async Task<ActionResult<Product>> Post(Product prod) {
        if (prod.Price <= prod.PromoPrice)
            prod.PromoPrice = prod.Price - 0.01M;
        try {
            if (prod.ImageFile != null)
                prod.ImageName = await SaveImage(prod.ImageFile);

            _context.Products.Add(prod);
            _context.SaveChanges();
        }
        catch (Exception e) {
            _logger.LogError(8, e.Message);
            return BadRequest(e.Message);
        }
        _cache.askForRefresh();
        return prod;
    }

    [EnableCors("_myAllowSpecificOrigins"), HttpPatch(Name = "Product")]
    public ActionResult<Product> Patch(Product prod) {
        try {
            _context.Products.Update(prod);
            _context.SaveChanges();
        }
        catch (Exception e) {
            _logger.LogError(8, e.Message);
            return BadRequest(e.Message);
        }
        _cache.askForRefresh();
        return prod;
    }

    [EnableCors("_myAllowSpecificOrigins"), HttpDelete(Name = "Product")]
    public ActionResult<int> DeleteProduct(int id) {
        try {
            _context.Products.Remove(_context.Products.Where(x => x.Id == id).First());
            _context.SaveChanges();
        }
        catch (Exception e) {
            _logger.LogError(8, e.Message);
            return BadRequest(e.Message);
        }
        _cache.askForRefresh();
        return id;
    }

    #endregion

    #region UtilityMethods
    private async Task<string> SaveImage(IFormFile imageFile) {
        string imageName = new String(Path.GetFileNameWithoutExtension(imageFile.FileName).Take(10).ToArray()).Replace(' ', '-');
        imageName = imageName + DateTime.Now.ToString("yymmssfff") + Path.GetExtension(imageFile.FileName);
        var imagePath = Path.Combine(_hostEnvironment.ContentRootPath, "Images", imageName);
        using (var fileStream = new FileStream(imagePath, FileMode.Create)) {
            await imageFile.CopyToAsync(fileStream);
        }
        return imageName;
    }
    #endregion
}