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

namespace GrossesMitainesAPI.Controllers;

[ApiController, Route("api/[controller]")]
public class ProductController : Controller {
    private readonly ILogger<ProductController> _logger;
    private readonly InventoryContext _context;

    public ProductController(ILogger<ProductController> logger, InventoryContext context) {
        _logger = logger;
        _context = context;
    }

    [EnableCors("_myAllowSpecificOrigins")]
    [HttpGet(Name = "Product"), AllowAnonymous]
    public Product Get(int id) {
        Product prod;
        try {
            prod = _context.Products.Where(x => x.Id == id).First();
        } catch (Exception e) {
            _logger.LogError(8, e.Message);
            prod = new Product();
        }
        return prod;
    }

    [EnableCors("_myAllowSpecificOrigins")]
    [HttpPost(Name = "Product")]
    public void Post(string title, string category, string description, decimal? price, decimal? promoprice, uint? quantity, string? status, string imagename) {
        Product prod = new() {
            Title = title,
            Category = category,
            Description = description,
            Price = price.HasValue ? (decimal)price : 0.01M,
            PromoPrice = promoprice.HasValue ? (decimal)promoprice : 0.01M,
            Quantity = quantity.HasValue ? (uint)quantity : 0,
            ImageName = imagename
        };

        switch (status) {
            case "isAvailable":
                prod.Status = Product.States.Available;
                break;
            case "isUnavailable":
                prod.Status = Product.States.Unavailable;
                break;
            case "isBackOrder":
                prod.Status = Product.States.BackOrder;
                break; ;
            case "isClearance":
                prod.Status = Product.States.Clearance;
                break;
            case "isPromotion":
                prod.Status = Product.States.Promotion;
                break;
            case "isDiscontinued":
                prod.Status = Product.States.Discontinued;
                break;
            default: break;
        }

        if (prod.Price <= prod.PromoPrice)
            prod.PromoPrice = prod.Price - 0.01M;

        try {
            _context.Products.Add(prod);
            _context.SaveChanges();
        } catch (Exception e) {
            _logger.LogError(8, e.Message);
        }
    }

    [EnableCors("_myAllowSpecificOrigins")]
    [HttpPut(Name = "Product")]
    public void Put(int id, string title, string category, string description, decimal? price, decimal? promoprice, uint? quantity, string? status, string imagename) {
        Product prod = _context.Products.Where(x => x.Id == id).FirstOrDefault();

        if (prod == new Product())
            Post(title, category, description, price, promoprice, quantity, status, imagename);
        else try {
                if (title != null || title != "")
                    prod.Title = title;

                if (category != null || category != "")
                    prod.Category = category;

                if (description != null || description != "")
                    prod.Description = description;

                if (price.HasValue || price > 0)
                    prod.Price = (decimal)price;

                if (promoprice.HasValue || promoprice > prod.Price)
                    prod.PromoPrice = (decimal)promoprice;

                if (quantity.HasValue)
                    prod.Quantity = (uint)quantity;

                switch (status) {
                    case "isAvailable":
                        prod.Status = Product.States.Available;
                        break;
                    case "isUnavailable":
                        prod.Status = Product.States.Unavailable;
                        break;
                    case "isBackOrder":
                        prod.Status = Product.States.BackOrder;
                        break; ;
                    case "isClearance":
                        prod.Status = Product.States.Clearance;
                        break;
                    case "isPromotion":
                        prod.Status = Product.States.Promotion;
                        break;
                    case "isDiscontinued":
                        prod.Status = Product.States.Discontinued;
                        break;
                    default: break;
                }

                if (imagename != null || imagename != "")
                    prod.ImageName = imagename;

                _context.Products.Update(prod);
                _context.SaveChanges();
            } catch (Exception e) {
                _logger.LogError(8, e.Message);
            }
    }

    [EnableCors("_myAllowSpecificOrigins")]
    [HttpPatch(Name = "Product")]
    public void Patch(int id, string title, string category, string description, decimal? price, decimal? promoprice, uint? quantity, string? status, string imagename) {
        try {
            Product prod = _context.Products.Where(x => x.Id == id).First();

            if (title != null || title != "")
                prod.Title = title;

            if (category != null || category != "")
                prod.Category = category;

            if (description != null || description != "")
                prod.Description = description;

            if (price.HasValue || price > 0)
                prod.Price = (decimal)price;

            if (promoprice.HasValue || promoprice > prod.Price)
                prod.PromoPrice = (decimal)promoprice;

            if (quantity.HasValue)
                prod.Quantity = (uint)quantity;

            switch (status) {
                case "isAvailable":
                    prod.Status = Product.States.Available;
                    break;
                case "isUnavailable":
                    prod.Status = Product.States.Unavailable;
                    break;
                case "isBackOrder":
                    prod.Status = Product.States.BackOrder;
                    break; ;
                case "isClearance":
                    prod.Status = Product.States.Clearance;
                    break;
                case "isPromotion":
                    prod.Status = Product.States.Promotion;
                    break;
                case "isDiscontinued":
                    prod.Status = Product.States.Discontinued;
                    break;
                default: break;
            }

            if (imagename != null || imagename != "")
                prod.ImageName = imagename;

            _context.Products.Update(prod);
            _context.SaveChanges();
        } catch (Exception e) {
            _logger.LogError(8, e.Message);
        }
    }

    [EnableCors("_myAllowSpecificOrigins")]
    [HttpDelete(Name = "Product")]
    public void 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);
        }
    }
}