using Contracts.ViewModels;
using DocumentFormat.OpenXml.Spreadsheet;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;

namespace ImplementerApp.Controllers
{
    public class ReportController : Controller
    {
        private readonly ILogger<ReportController> _logger;
        private readonly ImplementerData _data;
        public ReportController(ILogger<ReportController> logger, ImplementerData data)
        {
            _logger = logger;
            _data = data;
        }
        private bool IsLoggedIn { get { return UserImplementer.user != null; } }
        private int UserId { get { return UserImplementer.user!.Id; } }


        [HttpGet]
        public IActionResult DetailTimeChoose()
        {
            if (!IsLoggedIn)
                return RedirectToAction("IndexNonReg", "Home");
            return View();
        }
        [HttpPost]
        public IActionResult TimeReportWeb(DateTime startDate, DateTime endDate)
        {
            HttpContext.Session.SetString("StartDate", startDate.ToString());
            HttpContext.Session.SetString("EndDate", endDate.ToString());

            return RedirectToAction("DetailTimeReport");
        }
        [HttpGet]
        public IActionResult DetailTimeReport()
        {
            if (!IsLoggedIn)
                return RedirectToAction("IndexNonReg", "Home");
            try {
            var startDateStr = HttpContext.Session.GetString("StartDate");
            var endDateStr = HttpContext.Session.GetString("EndDate");
            var startDate = DateTime.Parse(startDateStr);
            var endDate = DateTime.Parse(endDateStr).AddDays(1);

            var values = _data.GetTimeReport(startDate, endDate, UserId);

            ViewBag.StartDate = startDate;
            ViewBag.EndDate = endDate;

            return View(values);
            } catch
            {
                return RedirectToAction("Index", "Home");
            }
        }
        [HttpPost]
        public void DetailTimeMail()
        {
            try
            {
                var startDateStr = HttpContext.Session.GetString("StartDate");
                var endDateStr = HttpContext.Session.GetString("EndDate");
                var startDate = DateTime.Parse(startDateStr);
                var endDate = DateTime.Parse(endDateStr).AddDays(1);
                using (MemoryStream memoryStream = new MemoryStream())
                {
                    _data.SendMailReport(startDate, endDate, UserId, memoryStream);
                }
                Response.Redirect("DetailTimeReport");
            }
            catch
            {
                Response.Redirect("Error");
            }
        }
        [HttpGet]
        public IActionResult DetailWorkshopChoose()
        {
            if (!IsLoggedIn)
                return RedirectToAction("IndexNonReg", "Home");
            try
            {
                var details = _data.GetDetails(UserId);
                return View(details);
            }
            catch
            {
                return RedirectToAction("Error");
            }
        }
        [HttpPost]
        public IActionResult DetailWorkshopChoose(List<int> selectedItems, string reportType)
        {
            try
            {
                string value = string.Join("/", selectedItems);
                HttpContext.Session.SetString("Details", value);
                if (reportType.Equals("default"))
                    return RedirectToAction("DetailWorkshopReport");
                else if (reportType.Equals("excel"))
                    return RedirectToAction("ExcelGenerate");
                else
                    return RedirectToAction("WordGenerate");
            }
            catch
            {
                return RedirectToAction("Error");
            }
        }
        public async Task<IActionResult> ExcelGenerate()
        {
            try { 
                var value = HttpContext.Session.GetString("Details");
                if (value != null)
                {
                    List<int> rawReports = value!.Split('/').Select(x => int.Parse(x)).ToList();
                    using (MemoryStream memoryStream = new MemoryStream())
                    {
                        _data.SaveReportExcel(rawReports, memoryStream);
                        memoryStream.Seek(0, SeekOrigin.Begin);
                        var outputStream = new MemoryStream();
                        await memoryStream.CopyToAsync(outputStream);
                        outputStream.Seek(0, SeekOrigin.Begin);
                        return File(outputStream, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "ReportExcel.xlsx");
                    }
                }
                return RedirectToAction("DetailWorkshopChoose");
            }
            catch
            {
                return RedirectToAction("Error");
            }
        }
        public async Task<IActionResult> WordGenerate()
        {
            try { 
                var value = HttpContext.Session.GetString("Details");
                if (value != null)
                {
                    List<int> rawReports = value!.Split('/').Select(x => int.Parse(x)).ToList();
                    using (MemoryStream memoryStream = new MemoryStream())
                    {
                        _data.SaveReportWord(rawReports, memoryStream);
                        memoryStream.Seek(0, SeekOrigin.Begin);
                        var outputStream = new MemoryStream();
                        await memoryStream.CopyToAsync(outputStream);
                        outputStream.Seek(0, SeekOrigin.Begin);
                        return File(outputStream, "application/vnd.openxmlformats-officedocument.wordprocessingml.document", "ReportWord.docx");
                    }
                }
                return RedirectToAction("DetailWorkshopChoose");
            }
            catch
            {
                return RedirectToAction("Error");
            }
        }
        [HttpGet]
        public IActionResult DetailWorkshopReport()
        {
            if (!IsLoggedIn)
                return RedirectToAction("IndexNonReg", "Home");
            try
            {
                var value = HttpContext.Session.GetString("Details");
                if (value != null)
                {
                    List<int> rawReports = value!.Split('/').Select(x => int.Parse(x)).ToList();
                    var reports = _data.GetWorkshopReports(rawReports);
                    return View(reports);
                }
            }
            catch
            {
                return RedirectToAction("Error");
            }
            return View(new List<DetailWorkshopReportViewModel>());
        }
        public IActionResult ReportsMenu()
        {
            return View();
        }

        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
        public IActionResult Error()
        {
            return RedirectToAction("IndexNonReg", "Home");
        }
    }
}