using System;
using System.Collections.Generic;
using System.Web.Mvc;
using LeafWeb.Core.Entities;
using LeafWeb.Core.Utility;
using LeafWeb.WebCms.Models;
using LeafWeb.WebCms.Utility;
using Microsoft.Ajax.Utilities;
using Umbraco.Web.Mvc;

namespace LeafWeb.WebCms.Controllers
{
    public class DownloadController : BaseController
    {
        [ActionLog]
        public ActionResult Results(string token)
        {
            var leafInput = DataService.GetLeafInput(token);

            if (leafInput == null)
                return View("DownloadNotFound");

            var zip = leafInput.GetOutputFileZip(LeafOutputFileType.ToUser);

            var filename = leafInput.Identifier.FilterValidFilename() + ".zip";

            return new FileContentResult(zip, "application/zip") { FileDownloadName = filename };
        }

        [MemberAuthorize(AllowGroup = "Authenticated,Administrator")]
        public ActionResult Input(int id)
        {
            var leafInput = DataService.GetLeafInput(id);

            // check leafinput email matches current user
            if (!Permissions.IsCurrentUserAdministrator() && 
                !leafInput.DoesBelongToUser(HttpContext.User.Identity.Name))
            {
                return View("PermissionDenied");
            }

            return GetInputZip(leafInput);
        }

        [MemberAuthorize(AllowGroup = "Authenticated,Administrator")]
        public ActionResult OutputToUser(int id)
        {
            var leafInput = DataService.GetLeafInput(id);

            // check leafinput email matches current user
            if (!Permissions.IsCurrentUserAdministrator() &&
                !leafInput.DoesBelongToUser(HttpContext.User.Identity.Name))
            {
                return View("PermissionDenied");
            }

            return GetOutputZip(leafInput, LeafOutputFileType.ToUser);
        }

        [MemberAuthorize(AllowGroup = "Administrator")]
        public ActionResult OutputNotToUser(int id)
        {
            return GetOutputZip(id, LeafOutputFileType.NotToUser);
        }

        [MemberAuthorize(AllowGroup = "Administrator")]
        public ActionResult OutputCleanedInput(int id)
        {
            return GetOutputZip(id, LeafOutputFileType.CleanedInput);
        }

        [MemberAuthorize(AllowGroup = "Administrator")]
        public ActionResult ResultsInputZip(LeafDataQuery query)
        {
            return GetResults(query, LeafInput.GetInputFilesZip, $"LeafWeb_{DateTime.Now:yyyy-dd-MM--HH-mm-ss}_Input.zip");
        }

        [MemberAuthorize(AllowGroup = "Administrator")]
        public ActionResult ResultsOutputZip(LeafDataQuery query)
        {
            return GetResults(query, LeafInput.GetOutputFilesZip_ToUser, $"LeafWeb_{DateTime.Now:yyyy-dd-MM--HH-mm-ss}_Output.zip");
        }

        private ActionResult GetOutputZip(int id, LeafOutputFileType type)
            => GetOutputZip(DataService.GetLeafInput(id), type);

        private ActionResult GetOutputZip(LeafInput leafInput, LeafOutputFileType type)
        {
            if (leafInput == null)
                return View("DownloadNotFound");

            var zip = leafInput.GetOutputFileZip(type);

            var suffix = 
                type == LeafOutputFileType.ToUser 
                ? "_Output" 
                : $"_Output_{type}";

            var filename = $"{leafInput.Identifier.FilterValidFilename()}{suffix}.zip";

            return new FileContentResult(zip, "application/zip") { FileDownloadName = filename };
        }

        private ActionResult GetInputZip(int id)
            => GetInputZip(DataService.GetLeafInput(id));

        private ActionResult GetInputZip(LeafInput leafInput)
        {
            if (leafInput == null)
                return View("DownloadNotFound");

            var zip = leafInput.GetInputFileZip();

            var filename = $"{leafInput.Identifier.FilterValidFilename()}_Input.zip";

            return new FileContentResult(zip, "application/zip") { FileDownloadName = filename };
        }

        private ActionResult GetResults(LeafDataQuery query, Func<IEnumerable<LeafInput>, byte[]> getZip, string filename)
        {
            var resultItems =
                DataService.GetLeafInputsOrdered();

            resultItems
                = QueryFilter.Search(resultItems, query, Members.GetCurrentLoginStatus()?.Email);

            if (resultItems == null)
                return View("DownloadNotFound");

            var zip = getZip(resultItems);

            //var filename = $"LeafWeb_{DateTime.Now:yyyy-dd-MM--HH-mm-ss}_Input.zip";

            return new FileContentResult(zip, "application/zip") { FileDownloadName = filename };
        }
    }
}