using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Mvc;
using PlaylistShared.Api.Entities;
using PlaylistShared.Api.Extensions;
using PlaylistShared.Api.Services;
using PlaylistShared.Shared.DTO;
using PlaylistShared.Shared.Enums;
using PlaylistShared.Shared.Models;
using YandexMusic;

namespace PlaylistShared.Api.Controllers;

[ApiController]
[Route("api/[controller]")]
[Authorize]
public class PlaylistsController : ControllerBase
{
    private readonly UserManager<ApplicationUser> _userManager;
    private readonly SharedPlaylistService _sharedService;
    private readonly YandexMusicService _yandexService;

    public PlaylistsController(
        UserManager<ApplicationUser> userManager,
        SharedPlaylistService sharedService,
        YandexMusicService yandexService)
    {
        _userManager = userManager;
        _sharedService = sharedService;
        _yandexService = yandexService;
    }

    [HttpGet]
    public async Task<ActionResult<ApiResponse<List<YandexPlaylistInfo>>>> GetMyPlaylists()
    {
        var userId = User.GetUserId();
        var user = await _userManager.FindByIdAsync(userId.ToString());
        if (user == null) return Unauthorized();

        var decryptedToken = _yandexService.DecryptToken(user.YandexAccessToken);
        if (string.IsNullOrEmpty(decryptedToken))
            return BadRequest(ApiResponse<object>.Fail(new ErrorResponse { StatusCode = 400, Message = "Токен Яндекс.Музыки не установлен или недействителен" }));

        var yandexClient = new YandexMusicClient();
        var authSuccess = await yandexClient.Authorize(decryptedToken);
        if (!authSuccess)
            return BadRequest(ApiResponse<object>.Fail(new ErrorResponse { StatusCode = 400, Message = "Не удалось авторизоваться в Яндекс.Музыке. Проверьте токен." }));

        var favorites = await yandexClient.GetFavoritesAsync();
        var ownPlaylists = favorites.Where(p => p.Owner.Uid == yandexClient.Account.Uid).ToList();

        var sharedPlaylists = await _sharedService.GetAllByUserAsync(userId);

        var result = ownPlaylists.Select(p => new YandexPlaylistInfo
        {
            Kind = p.Kind,
            OwnerUid = p.Owner.Uid,
            Title = p.Title,
            CoverUrl = p.Cover?.GetUrl() ?? "",
            TrackCount = p.TrackCount,
            IsShared = sharedPlaylists.Any(s => s.YandexPlaylistKind == p.Kind && s.YandexPlaylistOwnerUid == p.Owner.Uid),
            ShareToken = sharedPlaylists.FirstOrDefault(s => s.YandexPlaylistKind == p.Kind && s.YandexPlaylistOwnerUid == p.Owner.Uid)?.ShareToken,
        }).ToList();

        return Ok(ApiResponse<List<YandexPlaylistInfo>>.Ok(result));
    }

    [HttpPost("share")]
    public async Task<ActionResult<ApiResponse<SharedPlaylistDto>>> SharePlaylist([FromBody] SharePlaylistRequest request)
    {
        var userId = User.GetUserId();
        var user = await _userManager.FindByIdAsync(userId.ToString());
        if (user == null) return Unauthorized();

        // Проверяем, что плейлист действительно принадлежит пользователю
        var yandexClient = new YandexMusicClient();
        await yandexClient.Authorize(_yandexService.DecryptToken(user.YandexAccessToken));
        var playlist = await yandexClient.GetPlaylistAsync(request.OwnerUid, request.Kind);
        if (playlist == null || playlist.Owner.Uid != yandexClient.Account.Uid)
            return BadRequest(ApiResponse<object>.Fail(new ErrorResponse { StatusCode = 400, Message = "Плейлист не принадлежит вам" }));

        var dto = new SharePlaylistDto
        {
            YandexPlaylistKind = request.Kind,
            YandexPlaylistOwnerUid = request.OwnerUid,
            Title = playlist.Title,
            Description = playlist.Description,
            ViewPermission = ViewPermission.Everyone,
            AddPermission = EditPermission.AuthorizedOnly,
            RemovePermission = EditPermission.AddedByUserOnly
        };

        var result = await _sharedService.CreateAsync(userId, dto);
        return Ok(ApiResponse<SharedPlaylistDto>.Ok(result));
    }
}