namespace GrossesMitainesAPI.Controllers;

#region Dependencies
using GrossesMitainesAPI.Data;
using GrossesMitainesAPI.Models;
using GrossesMitainesAPI.Services;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Cors;
using Microsoft.AspNetCore.Mvc;

#endregion

[EnableCors("_myAllowSpecificOrigins"), ApiController, Route("api/[controller]"),
 Authorize(AuthenticationSchemes = "Identity.Application")]
public class ImageController : ControllerBase {
    #region DI Fields
    private readonly InventoryContext _context;
    private readonly IWebHostEnvironment _hostEnvironment;
    private readonly ILogger<ProductController> _logger;
    private readonly DatabaseCacheService? _cache = null;

    #endregion

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

    #endregion

    #region API Methods
    [EnableCors("_myAllowSpecificOrigins"), HttpGet(Name = "Image"), AllowAnonymous]
    public IActionResult Get(int id, bool? thumbnail = false) {
        string path, filename, filetype;
        IQueryable<ProductModel> query;

        if (_cache is not null && _cache.isOk())
            query = _cache.queryCache();
        else query = _context.Products;

        try {
            filename = query.Where(x => x.Id == id).First().ImageName ?? 
                throw new Exception("Unable to find product image name. Sending default.jpg instead...");
        } catch (Exception e) {
            _logger.LogError(8, e.Message);
            filename = "default.jpg";
        }

        path = Path.Combine(_hostEnvironment.ContentRootPath, "Images",
                            Path.GetFileNameWithoutExtension(filename) + 
                            (thumbnail == true ? "_thumbnail" : "") + 
                            Path.GetExtension(filename));
        
        if (!System.IO.File.Exists(path)) {
            _logger.LogError(8, "Unable to find image. Sending default image instead...");
            path = Path.Combine(_hostEnvironment.ContentRootPath, "Images", "default.jpg");
        }

        switch (Path.GetExtension(path)) {
            case ".png":
                filetype = "image/png";
                break;
            case ".jpg": case ".jpeg": default:
                filetype = "image/jpeg";
                break;
        }

        return File(System.IO.File.ReadAllBytes(path), filetype);
    }

    #endregion
}