using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using PSTW_CentralSystem.Areas.Inventory.Models;
using PSTW_CentralSystem.DBContext;
using PSTW_CentralSystem.Models;

namespace PSTW_CentralSystem.Controllers.API.Reporting
{
    [ApiController]
    [Route("[controller]")]
    [Authorize]
    public class ReportingAPI : Controller
    {
        private readonly ILogger<ReportingAPI> _logger;
        private readonly CentralSystemContext _centralDbContext;
        private readonly UserManager<UserModel> _userManager;
        private readonly RoleManager<RoleModel> _roleManager;

        public ReportingAPI(ILogger<ReportingAPI> logger, CentralSystemContext centralDbContext, UserManager<UserModel> userManager, RoleManager<RoleModel> roleManager)
        {
            _logger = logger;
            _centralDbContext = centralDbContext;
            _userManager = userManager;
            _roleManager = roleManager;
        }

        #region ItemReport

        [HttpPost("GetInventoryReport/{deptId}")]
        public async Task<IActionResult> GetInventoryReport(int? deptId)
        {
            try
            {
                var user = await _userManager.GetUserAsync(User);

                List<ItemModel> items = new List<ItemModel>();
                if (deptId == null || deptId == 0)
                {
                    items = await _centralDbContext.Items
                    .Include("CreatedBy")
                    .Include("Department")
                    .Include("Product")
                    .ToListAsync();
                }
                else
                {
                    items = await _centralDbContext.Items
                    .Include("CreatedBy")
                    .Include("Department")
                    .Include("Product")
                    .Where(i => i.DepartmentId == deptId)
                    .ToListAsync();
                }
                var itemListWithDetails = items.Select(item => new
                {
                    item.ItemID,
                    item.UniqueID,
                    item.CompanyId,
                    item.DepartmentId,
                    item.ProductId,
                    item.SerialNumber,
                    item.Quantity,
                    item.Supplier,
                    PurchaseDate = item.PurchaseDate.ToString("dd/MM/yyyy"),
                    item.PONo,
                    item.Currency,
                    item.DefaultPrice,
                    item.CurrencyRate,
                    item.ConvertPrice,
                    item.DODate,
                    item.Warranty,
                    EndWDate = item.EndWDate.ToString("dd/MM/yyyy"),
                    InvoiceDate = item.InvoiceDate?.ToString("dd/MM/yyyy"),
                    item.Department?.DepartmentName,
                    CreatedBy = item.CreatedBy!.UserName,
                    item.Product!.ProductName,
                    item.Product!.Category,
                    //CurrentUser = item.Movement?.FromUser?.UserName,
                    CurrentUser = item.Movement?.FromUser?.UserName,
                    CurrentStore = item.Movement?.FromStore?.StoreName,
                    CurrentStation = item.Movement?.FromStation?.StationName,

                    QRString = $"{HttpContext.Request.Scheme}://{HttpContext.Request.Host.Value}/I/{item.UniqueID}" // Generate QR String
                }).ToList();

                int itemCountRegistered = items.Count;
                int itemCountStillInStock = items.Where(i => i.Quantity > 0).Count();
                var itemsMovementsThisMonth = _centralDbContext.ItemMovements
                .Where(i => i.Date.Month == DateTime.Now.Month);
                int itemCountRegisteredThisMonth = itemsMovementsThisMonth.Count(i => i.Action == "Register");
                int itemCountStockOutThisMonth = itemsMovementsThisMonth.Count(i => i.Action == "Stock Out");

                var lastMonth = DateTime.Now.AddMonths(-1).Month;
                var itemsMovementsLastMonth = _centralDbContext.ItemMovements
                .Where(i => i.Date.Month == lastMonth);
                int itemCountRegisteredLastMonth = itemsMovementsLastMonth.Count(i => i.Action == "Register");
                int itemCountStockOutLastMonth = itemsMovementsLastMonth.Count(i => i.Action == "Stock Out");

                var report = new
                {
                    itemCountRegistered,
                    itemCountStillInStock,
                    itemCountRegisteredThisMonth,
                    itemCountStockOutThisMonth,
                    itemCountRegisteredLastMonth,
                    itemCountStockOutLastMonth
                };
                return Json(report);
            }
            catch (Exception ex)
            {
                return BadRequest(ex.Message);
            }
        }

        #endregion
    }
}