using System;
using System.Collections.Generic;

namespace Jellyfin.Plugin.JellyLMS.Models;

/// <summary>
/// Represents the current playback state.
/// </summary>
public enum PlaybackState
{
    /// <summary>
    /// Device connected, no media loaded.
    /// </summary>
    Idle,

    /// <summary>
    /// Play command sent, waiting for LMS to confirm playback started.
    /// </summary>
    Loading,

    /// <summary>
    /// Playback is active.
    /// </summary>
    Playing,

    /// <summary>
    /// Playback is paused.
    /// </summary>
    Paused,

    /// <summary>
    /// Position change in progress.
    /// </summary>
    Seeking,

    /// <summary>
    /// Playback failed with an error.
    /// </summary>
    Error,

    /// <summary>
    /// Playback has ended.
    /// </summary>
    Stopped
}

/// <summary>
/// Types of playback errors.
/// </summary>
public enum PlaybackErrorType
{
    /// <summary>
    /// No error.
    /// </summary>
    None,

    /// <summary>
    /// Operation timed out waiting for LMS response.
    /// </summary>
    Timeout,

    /// <summary>
    /// Network error communicating with LMS.
    /// </summary>
    NetworkError,

    /// <summary>
    /// LMS returned an error.
    /// </summary>
    LmsError,

    /// <summary>
    /// Error with the audio stream from Jellyfin.
    /// </summary>
    StreamError,

    /// <summary>
    /// Unknown error.
    /// </summary>
    Unknown
}

/// <summary>
/// Contains details about a playback error.
/// </summary>
public class PlaybackErrorInfo
{
    /// <summary>
    /// Gets or sets the type of error.
    /// </summary>
    public PlaybackErrorType ErrorType { get; set; }

    /// <summary>
    /// Gets or sets the error message.
    /// </summary>
    public string Message { get; set; } = string.Empty;

    /// <summary>
    /// Gets or sets when the error occurred.
    /// </summary>
    public DateTime OccurredAt { get; set; }

    /// <summary>
    /// Gets or sets the number of retry attempts made.
    /// </summary>
    public int RetryCount { get; set; }
}

/// <summary>
/// Represents an active playback session bridging Jellyfin to LMS.
/// </summary>
public class LmsPlaybackSession
{
    /// <summary>
    /// Gets or sets the unique session identifier.
    /// </summary>
    public string SessionId { get; set; } = Guid.NewGuid().ToString();

    /// <summary>
    /// Gets or sets the Jellyfin session ID.
    /// </summary>
    public string? JellyfinSessionId { get; set; }

    /// <summary>
    /// Gets or sets the Jellyfin item ID being played.
    /// </summary>
    public Guid ItemId { get; set; }

    /// <summary>
    /// Gets or sets the item name for display.
    /// </summary>
    public string ItemName { get; set; } = string.Empty;

    /// <summary>
    /// Gets or sets the artist name (for audio).
    /// </summary>
    public string? Artist { get; set; }

    /// <summary>
    /// Gets or sets the album name (for audio).
    /// </summary>
    public string? Album { get; set; }

    /// <summary>
    /// Gets or sets the MAC addresses of LMS players in this session.
    /// </summary>
    public List<string> PlayerMacs { get; set; } = [];

    /// <summary>
    /// Gets or sets the current playback state.
    /// </summary>
    public PlaybackState State { get; set; } = PlaybackState.Idle;

    /// <summary>
    /// Gets or sets the last error that occurred during playback.
    /// </summary>
    public PlaybackErrorInfo? LastError { get; set; }

    /// <summary>
    /// Gets or sets the current playback position in ticks.
    /// </summary>
    public long PositionTicks { get; set; }

    /// <summary>
    /// Gets or sets the total runtime in ticks.
    /// </summary>
    public long RuntimeTicks { get; set; }

    /// <summary>
    /// Gets or sets when this session started.
    /// </summary>
    public DateTime StartedAt { get; set; } = DateTime.UtcNow;

    /// <summary>
    /// Gets or sets the audio stream URL being played on LMS.
    /// </summary>
    public string? StreamUrl { get; set; }

    /// <summary>
    /// Gets or sets the Jellyfin user ID who initiated playback.
    /// </summary>
    public Guid? UserId { get; set; }
}