using MongoDB.Entities;

namespace PrivaPub.Models
{
	// The server's own settings (completion program R5), edited from the administrator's page: one document with the fixed
	// id `settings`, read through IInstanceSettings (Domain/Instance/InstanceSettings.cs). While none exists, Defaults() is
	// what PrivaPub served and sent before the settings existed, word for word, so nothing changes until an administrator
	// saves. A backup holds it, and a restore keeps the live one (ProtectiveMerge).
	public class ServerSettings : Entity
	{
		public const string Name = "settings";
		public const string DefaultTitle = "PrivaPub";
		public const string DefaultDescription = "A small ActivityPub server where one private login keeps several unlinkable public personas.";
		public const string DefaultThumbnailPath = "/media/missing-header.png";
		public static readonly DateTime DefaultPrivacyPolicyUpdatedAt = new(2026, 10, 4, 0, 0, 0, DateTimeKind.Utc);
		// the privacy policy PrivaPub served before it could be edited, as Markdown: it renders to the same paragraph
		public const string DefaultPrivacyPolicy = "One private login owns several public personas, and nobody but this server's admin can tell they belong "
			+ "together. What a persona posts is shared as its visibility says; a located post never leaves this server. "
			+ "Uploads lose their metadata. Statistics name servers, never people: see /stargazing.";

		public string Title { get; set; } = DefaultTitle;
		public string ShortDescription { get; set; } = DefaultDescription;
		public string Description { get; set; } = DefaultDescription;//Markdown
		public DateTime? DescriptionUpdatedAt { get; set; }//null: the description was never edited (it then answers today)
		public string ContactEmail { get; set; }
		public string ContactAccountId { get; set; }//a local persona the administrator chose: publicly tied to running the server
		public string ThumbnailMediaId { get; set; }//its MediaAttachment (ServerUse "thumbnail")
		public string ThumbnailUrl { get; set; }//null: /media/missing-header.png
		public string PrivacyPolicy { get; set; } = DefaultPrivacyPolicy;//Markdown
		public DateTime? PrivacyPolicyUpdatedAt { get; set; } = DefaultPrivacyPolicyUpdatedAt;
		public string TermsOfService { get; set; }//Markdown; null: the server has none (the API answers 404)
		public DateTime? TermsEffectiveAt { get; set; }
		public List<ServerRule> Rules { get; set; } = new();//soft-deleted ones stay, so old reports keep their meaning
		public List<string> Relays { get; set; } = new();//besides Federation:Relays
		public ServerMediaLimits Media { get; set; } = new();
		public List<string> StaffPicks { get; set; } = new();//account ids, for later
		public bool PublishActivity { get; set; }//GET /api/v1/instance/activity; off by default
		public DateTime? UpdatedAt { get; set; }//null: never saved
		public string UpdatedBy { get; set; }//the administrator's root id, or "cli"

		public static ServerSettings Defaults() => new() { ID = Name };

		/// <summary>The rules shown to everyone: those not deleted, in their order.</summary>
		public IEnumerable<ServerRule> ListedRules() => Rules.Where(r => r.DeletedAt == null).OrderBy(r => r.Position);
	}

	public class ServerRule
	{
		public string Id { get; set; } = Guid.NewGuid().ToString("N");
		public string Text { get; set; }
		public string Hint { get; set; }
		public int Position { get; set; }
		public DateTime? DeletedAt { get; set; }
	}

	// what the administrator changed of Media:* (MediaOptions); null keeps the configured value. Applied by
	// Domain/Instance/MediaLimitsFromSettings within hard caps.
	public class ServerMediaLimits
	{
		public long? QuotaBytesPerRoot { get; set; }
		public long? MaxImageBytes { get; set; }
		public long? MaxVideoBytes { get; set; }
		public int? MaxSeconds { get; set; }
	}
}