using System;
using System.Collections.Generic;
using System.Globalization;
using Jellyfin.Plugin.JRay.Configuration;
using Jellyfin.Plugin.JRay.Models;

namespace Jellyfin.Plugin.JRay.Services;

/// <summary>Identity and cut parameters for a fetch.</summary>
public class TitleQuery
{
    /// <summary>Gets or sets the movie's TMDB id.</summary>
    public string? TmdbId { get; set; }

    /// <summary>Gets or sets the movie's IMDB id.</summary>
    public string? ImdbId { get; set; }

    /// <summary>Gets or sets the series TMDB id, for an episode.</summary>
    public string? SeriesTmdbId { get; set; }

    /// <summary>Gets or sets the season number, for an episode.</summary>
    public int? Season { get; set; }

    /// <summary>Gets or sets the episode number, for an episode.</summary>
    public int? Episode { get; set; }

    /// <summary>Gets or sets the local file's measured runtime, in seconds.</summary>
    public double? RuntimeSec { get; set; }

    /// <summary>Renders the query parameters the server expects.</summary>
    /// <remarks>
    /// There is deliberately no <c>video_hash</c> parameter. The file-hash tier
    /// is withdrawn on legal grounds (see <see cref="MatchTier"/>), and omitting
    /// the field here is what makes that structural: there is nothing to send,
    /// so no future caller can start sending one by setting a property.
    /// </remarks>
    /// <returns>An escaped query string, without the leading '?'.</returns>
    public string ToQueryString()
    {
        var parts = new List<string>();
        void Add(string key, string? value)
        {
            if (!string.IsNullOrEmpty(value))
            {
                parts.Add($"{key}={Uri.EscapeDataString(value)}");
            }
        }

        Add("tmdb_id", TmdbId);
        Add("imdb_id", ImdbId);
        Add("series_tmdb_id", SeriesTmdbId);
        Add("season", Season?.ToString(CultureInfo.InvariantCulture));
        Add("episode", Episode?.ToString(CultureInfo.InvariantCulture));
        Add("runtime_sec", RuntimeSec?.ToString("0.###", CultureInfo.InvariantCulture));
        return string.Join('&', parts);
    }
}