namespace IOL.GreatOffice.Api.Data.Dtos;

/// <summary>
/// Represents a user archive as it is provided to users.
/// </summary>
public class UserArchiveDto
{
	/// <inheritdoc cref="UserArchiveDto"/>
	public UserArchiveDto(User user) {
		Meta = new MetaDto {
				GeneratedAt = DateTime.UtcNow.ToString("yyyy-MM-ddTHH:mm:ssZ")
		};
		User = new UserDto(user);
		Entries = new List<EntryDto>();
	}

	/// <summary>
	/// Metadata for the user archive.
	/// </summary>
	public MetaDto Meta { get; }

	/// <summary>
	/// Relevant user data for the archive.
	/// </summary>
	public UserDto User { get; }

	/// <summary>
	/// List of entries that the user has created.
	/// </summary>
	public List<EntryDto> Entries { get; }

	public void CountEntries() {
		Meta.EntryCount = Entries.Count;
	}

	/// <summary>
	/// Represents a time entry in the data archive.
	/// </summary>
	public class EntryDto
	{
		public string CreatedAt { get; init; }

		[JsonIgnore]
		public DateTime StartDateTime { get; init; }

		/// <summary>
		/// ISO 8601 string of the UTC date the time entry started.
		/// </summary>
		public string Start => StartDateTime.ToString("yyyy-MM-ddTHH:mm:ssZ");

		[JsonIgnore]
		public DateTime StopDateTime { get; init; }

		/// <summary>
		/// ISO 8601 string of the UTC date the time entry stopped.
		/// </summary>
		public string Stop => StopDateTime.ToString("yyyy-MM-ddTHH:mm:ssZ");

		/// <summary>
		/// Total amount of minutes elapsed from start to stop on this time entry.
		/// </summary>
		public double Minutes => StopDateTime.Subtract(StartDateTime).TotalMinutes;

		public string Description { get; init; }

		/// <summary>
		/// Archive spesific category for this time entry.
		/// </summary>
		public CategoryDto Category { get; init; }

		/// <summary>
		/// Archive spesific list of labels for this time entry.
		/// </summary>
		public List<LabelDto> Labels { get; init; }
	}

	/// <summary>
	/// Time entry category as it is written to the user archive.
	/// </summary>
	public class CategoryDto
	{
		public string Name { get; init; }
		public string Color { get; init; }
	}

	/// <summary>
	/// Time entry label as it is written to the user archive.
	/// </summary>
	public class LabelDto
	{
		public string Name { get; init; }
		public string Color { get; init; }
	}


	/// <summary>
	/// Represents the user who this archive's data is based on.
	/// </summary>
	public class UserDto
	{
		/// <inheritdoc cref="UserDto"/>
		public UserDto(User user) {
			Username = user.Username;
			CreatedAt = user.CreatedAt;
		}

		/// <summary>
		/// UTC date this user was created.
		/// </summary>
		public DateTime CreatedAt { get; }

		public string Username { get; }
	}

	/// <summary>
	/// Represents the meta object which contains metdata for this archive.
	/// </summary>
	public class MetaDto
	{
		/// <summary>
		/// ISO 8601 UTC date string for when this archive was created.
		/// </summary>
		public string GeneratedAt { get; init; }

		/// <summary>
		/// Amount of entries in the archive.
		/// </summary>
		public int EntryCount { get; set; }
	}
}