#nullable enable
using System.Collections.Generic;

namespace JellyfinLessons.Data.Models;

/// <summary>
/// Represents a homeschool lesson plan.
/// </summary>
public class Lesson
{
    /// <summary>
    /// Unique identifier (Guid).
    /// </summary>
    public string Id { get; set; } = string.Empty;

    /// <summary>
    /// Lesson title.
    /// </summary>
    public string Title { get; set; } = string.Empty;

    /// <summary>
    /// Target grade level.
    /// </summary>
    public int Grade { get; set; }

    /// <summary>
    /// Subject area (e.g. Math, Science, History).
    /// </summary>
    public string Subject { get; set; } = string.Empty;

    /// <summary>
    /// Date the lesson covers (ISO 8601 format).
    /// </summary>
    public string LessonDate { get; set; } = string.Empty;

    /// <summary>
    /// Optional description of the lesson.
    /// </summary>
    public string? Description { get; set; }

    /// <summary>
    /// Path to the source markdown or plan file.
    /// </summary>
    public string SourcePath { get; set; } = string.Empty;

    /// <summary>
    /// Pre-compiled HTML rendering of the lesson.
    /// </summary>
    public string? CompiledHtml { get; set; }

    /// <summary>
    /// ISO 8601 creation timestamp.
    /// </summary>
    public string CreatedAt { get; set; } = string.Empty;

    /// <summary>
    /// ISO 8601 last-updated timestamp.
    /// </summary>
    public string UpdatedAt { get; set; } = string.Empty;

    /// <summary>
    /// Associated media items (lazy-loaded).
    /// </summary>
    public List<LessonMedia> MediaItems { get; set; } = new();
}