using System.Collections.ObjectModel;
using Microsoft.Extensions.Logging;
using Piwigo.Client.Contract;

namespace Piwigo.Client;

public class AlbumApi : IAlbumApi
{
    private readonly IPiwigoContext _context;
    private readonly ILogger<AlbumApi> _logger;

    public AlbumApi(IPiwigoContext context, ILogger<AlbumApi> logger)
    {
        _context = context ?? throw new ArgumentNullException(nameof(context));
        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
    }

    public async Task DeleteRepresentativeAsync(int albumId, CancellationToken cancellationToken = default)
    {
        var formParams = new Dictionary<string, string> { { "category_id", albumId.ToString() } };
        await _context.PostAsync<PiwigoResponse>(_logger, "pwg.categories.deleteRepresentative", formParams, cancellationToken);
    }

    public async Task RefreshRepresentativeAsync(int albumId, CancellationToken cancellationToken = default)
    {
        var formParams = new Dictionary<string, string> { { "category_id", albumId.ToString() } };
        await _context.PostAsync<PiwigoResponse>(_logger, "pwg.categories.refreshRepresentative", formParams, cancellationToken);
    }

    public async Task SetRepresentativeAsync(int albumId, int imageId, CancellationToken cancellationToken = default)
    {
        var formParams = new Dictionary<string, string> { { "category_id", albumId.ToString() }, { "image_id", imageId.ToString() } };
        await _context.PostAsync<PiwigoResponse>(_logger, "pwg.categories.setRepresentative", formParams, cancellationToken);
    }

    public async Task SetRankAsync(int albumId, int rank, CancellationToken cancellationToken = default)
    {
        var formParams = new Dictionary<string, string> { { "category_id", albumId.ToString() }, { "rank", rank.ToString() } };
        await _context.PostAsync<PiwigoResponse>(_logger, "pwg.categories.setRank", formParams, cancellationToken);
    }

    public async Task<AlbumOrphans> CalculateOrphansAsync(int albumId, CancellationToken cancellationToken = default)
    {
        var formParams = new Dictionary<string, string> { { "category_id", albumId.ToString() } };
        var response = await _context.PostAsync<PiwigoResponse<AlbumOrphans[]>>(_logger, "pwg.categories.calculateOrphans", formParams, cancellationToken);
        // the API seems to only return one result but returns it as a list in json
        return response.Result.First();
    }

    public async Task DeleteAsync(int albumId, string apiToken, CancellationToken cancellationToken = default)
    {
        var formParams = new Dictionary<string, string> { { "category_id", albumId.ToString() }, { "pwg_token", apiToken }, { "photo_deletion_mode", "delete_orphans" } };
        await _context.PostAsync<PiwigoResponse>(_logger, "pwg.categories.delete", formParams, cancellationToken);
    }

    public async Task<int> AddAsync(string name, int? parentId = null, string? comment = null, bool? visible = null, AlbumStatus? status = null, bool? commentable = null,
        AlbumPosition? position = null, CancellationToken cancellationToken = default)
    {
        var statusValue = GetAlbumStatusValue(status);

        var positionValue = position switch
        {
            AlbumPosition.First => "first",
            AlbumPosition.Last => "last",
            null => null,
            _ => throw new ArgumentOutOfRangeException(nameof(position), position, null)
        };

        var formParams = new Dictionary<string, string> { { "name", name } };
        formParams.AddIfValueNotNull("parent", parentId?.ToString()).AddIfValueNotNull("comment", comment).AddIfValueNotNull("visible", visible?.ToString())
            .AddIfValueNotNull("status", statusValue).AddIfValueNotNull("commentable", commentable?.ToString()).AddIfValueNotNull("position", positionValue);

        var response = await _context.PostAsync<PiwigoResponse<AlbumAdded>>(_logger, "pwg.categories.add", formParams, cancellationToken);
        if (!response.Result.Id.HasValue)
        {
            throw new PiwigoException($"Could not create album {name}: {response.Result.Info}");
        }

        return response.Result.Id.Value;
    }

    public async Task MoveAsync(int albumId, int parentAlbumId, string apiToken, CancellationToken cancellationToken = default)
    {
        var formParams = new Dictionary<string, string> { { "category_id", albumId.ToString() }, { "parent", parentAlbumId.ToString() }, { "pwg_token", apiToken } };
        await _context.PostAsync<PiwigoResponse>(_logger, "pwg.categories.move", formParams, cancellationToken);
    }

    public async Task SetInfoAsync(int albumId, string name, string? comment, AlbumStatus? status, CancellationToken cancellationToken = default)
    {
        var statusValue = GetAlbumStatusValue(status);

        var formParams = new Dictionary<string, string>
        {
            { "category_id", albumId.ToString() },
            { "name", name }
        };

        formParams.AddIfValueNotNull("comment", comment).AddIfValueNotNull("status", statusValue);
        await _context.PostAsync<PiwigoResponse>(_logger, "pwg.categories.setInfo", formParams, cancellationToken);
    }

    public async Task<IReadOnlyCollection<Album>> GetAllAsync(CancellationToken cancellationToken = default)
    {
        var formParams = new Dictionary<string, string> { { "recursive", "true" } };
        var response = await _context.PostAsync<PiwigoResponse<AlbumList>>(_logger, "pwg.categories.getList", formParams, cancellationToken);
        return new ReadOnlyCollection<Album>(response.Result.Albums);
    }

    private static string? GetAlbumStatusValue(AlbumStatus? status)
    {
        return status switch
        {
            AlbumStatus.Public => "public",
            AlbumStatus.Private => "private",
            null => null,
            _ => throw new ArgumentOutOfRangeException(nameof(status), status, null)
        };
    }
}