using System.Collections.Generic;
using Microsoft.AspNetCore.Mvc;
using Oqtane.Repository;
using Oqtane.Models;
using Oqtane.Shared;
using Microsoft.AspNetCore.Authorization;
using Oqtane.Infrastructure;
using System.IO;
using System.Reflection;
using System.Linq;
using Microsoft.AspNetCore.Hosting;
using Oqtane.Security;

namespace Oqtane.Controllers
{
    [Route("{site}/api/[controller]")]
    public class ModuleDefinitionController : Controller
    {
        private readonly IModuleDefinitionRepository _moduleDefinitions;
        private readonly IUserPermissions _userPermissions;
        private readonly IInstallationManager _installationManager;
        private readonly IWebHostEnvironment _environment;
        private readonly ILogManager _logger;

        public ModuleDefinitionController(IModuleDefinitionRepository moduleDefinitions, IUserPermissions userPermissions, IInstallationManager installationManager, IWebHostEnvironment environment, ILogManager logger)
        {
            _moduleDefinitions = moduleDefinitions;
            _userPermissions = userPermissions;
            _installationManager = installationManager;
            _environment = environment;
            _logger = logger;
        }

        // GET: api/<controller>?siteid=x
        [HttpGet]
        public IEnumerable<ModuleDefinition> Get(string siteid)
        {
            List<ModuleDefinition> moduledefinitions = new List<ModuleDefinition>();
            foreach(ModuleDefinition moduledefinition in _moduleDefinitions.GetModuleDefinitions(int.Parse(siteid)))
            {
                if (_userPermissions.IsAuthorized(User,PermissionNames.Utilize, moduledefinition.Permissions))
                {
                    moduledefinitions.Add(moduledefinition);
                }
            }
            return moduledefinitions;
        }

        // GET api/<controller>/5?siteid=x
        [HttpGet("{id}")]
        public ModuleDefinition Get(int id, string siteid)
        {
            ModuleDefinition moduledefinition = _moduleDefinitions.GetModuleDefinition(id, int.Parse(siteid));
            if (_userPermissions.IsAuthorized(User,PermissionNames.Utilize, moduledefinition.Permissions))
            {
                return moduledefinition;
            }
            else
            {
                _logger.Log(LogLevel.Error, this, LogFunction.Read, "User Not Authorized To Access ModuleDefinition {ModuleDefinition}", moduledefinition);
                HttpContext.Response.StatusCode = 401;
                return null;
            }
        }

        // PUT api/<controller>/5
        [HttpPut("{id}")]
        [Authorize(Roles = Constants.AdminRole)]
        public void Put(int id, [FromBody] ModuleDefinition ModuleDefinition)
        {
            if (ModelState.IsValid)
            {
                _moduleDefinitions.UpdateModuleDefinition(ModuleDefinition);
                _logger.Log(LogLevel.Information, this, LogFunction.Update, "Module Definition Updated {ModuleDefinition}", ModuleDefinition);
            }
        }

        [HttpGet("install")]
        [Authorize(Roles = Constants.HostRole)]
        public void InstallModules()
        {
            _installationManager.InstallPackages("Modules", true);
            _logger.Log(LogLevel.Information, this, LogFunction.Create, "Modules Installed");
        }

        // DELETE api/<controller>/5?siteid=x
        [HttpDelete("{id}")]
        [Authorize(Roles = Constants.HostRole)]
        public void Delete(int id, int siteid)
        {
            List<ModuleDefinition> moduledefinitions = _moduleDefinitions.GetModuleDefinitions(siteid).ToList();
            ModuleDefinition moduledefinition = moduledefinitions.Where(item => item.ModuleDefinitionId == id).FirstOrDefault();
            if (moduledefinition != null)
            {
                string moduledefinitionname = moduledefinition.ModuleDefinitionName.Substring(0, moduledefinition.ModuleDefinitionName.IndexOf(","));

                string folder = Path.Combine(_environment.WebRootPath, "Modules\\" + moduledefinitionname);
                if (Directory.Exists(folder))
                {
                    Directory.Delete(folder, true);
                }

                string binfolder = Path.GetDirectoryName(Assembly.GetEntryAssembly().Location);
                foreach (string file in Directory.EnumerateFiles(binfolder, moduledefinitionname + "*.dll"))
                {
                    System.IO.File.Delete(file);
                }

                _moduleDefinitions.DeleteModuleDefinition(id, siteid);
                _logger.Log(LogLevel.Information, this, LogFunction.Delete, "Module Deleted {ModuleDefinitionId}", id);

                _installationManager.RestartApplication();
            }
        }

        // GET api/<controller>/load/filename
        [HttpGet("load/{filename}")]
        public IActionResult Load(string assemblyname)
        {
            string binfolder = Path.GetDirectoryName(Assembly.GetEntryAssembly().Location);
            byte[] file = System.IO.File.ReadAllBytes(Path.Combine(binfolder, assemblyname));
            return File(file, "application/octet-stream", assemblyname);
        }

    }
}