using System;
using System.Collections.Generic;
using System.Configuration;
using System.IO;
using System.Linq;
using System.Threading.Tasks;

using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;

using Icarus.Controllers.Managers;
using Icarus.Models;
using Icarus.Models.Context;

namespace Icarus.Controllers
{
    [Route("api/song/data")]
    [ApiController]
    public class SongDataController : ControllerBase
    {
        #region Fields
        private IConfiguration _config;
		private SongManager _songMgr;
		private string _songTempDir;
		#endregion


		#region Properties
		#endregion


		#region Constructor
		public SongDataController(IConfiguration config)
		{
			_config = config;
			_songTempDir = _config.GetValue<string>("TemporaryMusicPath");
			_songMgr = new SongManager(config, _songTempDir);
		}
		#endregion


        [HttpGet("{id}")]
		[Route("private-scoped")]
		[Authorize("download:songs")]
        public async Task<IActionResult> Get(int id)
        {
			MusicStoreContext context = HttpContext
										.RequestServices
		    				   			.GetService(typeof(MusicStoreContext)) 
						   				as MusicStoreContext;
			var songMetaData = context.GetSong(id); 
			
			SongData song = await _songMgr.RetrieveSong(songMetaData);
			
			return File(song.Data, "application/x-msdownload", songMetaData.Filename);
		}

        [HttpPost]
		[Authorize("upload:songs")]
        public async Task Post([FromForm(Name = "file")] List<IFormFile> songData)
        {
			try
			{
				MusicStoreContext context = HttpContext
											.RequestServices
											.GetService(typeof(MusicStoreContext)) 
											as MusicStoreContext;

				Console.WriteLine("Uploading song...");

				var uploads = _songTempDir;
				Console.WriteLine($"Song Root Path {uploads}");
				foreach (var sng in songData)
				{
					if (sng.Length > 0) {
						Console.WriteLine($"Song filename {sng.FileName}");
						await _songMgr.SaveSongToFileSystem(sng);
						var song = _songMgr.SongDetails;
						context.SaveSong(song);
						Console.WriteLine("Song successfully saved");
					}
				}
			}
			catch (Exception ex)
			{
				Console.WriteLine($"An error occurred: {ex.Message}");
			}
		}

        [HttpPut("{id}")]
        public void Put(int id, [FromBody] SongData song)
        {
        }

        [HttpDelete("{id}")]
		[Authorize("delete:songs")]
        public void Delete(int id)
        {
			MusicStoreContext context = HttpContext
										.RequestServices
										.GetService(typeof(MusicStoreContext)) 
										as MusicStoreContext;
			
			var songMetaData = context.GetSong(id);
			
			var result = _songMgr.DeleteSongFromFileSystem(songMetaData);
			
			if (result)
			{
				context.DeleteSong(songMetaData.Id);
			}
		}
    }
}