using HSchool.Content;
using HSchool.People;
using HSchool.Schedule;

namespace HSchool.Simulation;

/// <summary>Turns a school's roster into planner input and back. The worker calls this, not the tick.</summary>
public static class SchoolTimetables
{
    public static Timetable Build(
        DefCatalog catalog,
        MapLayout map,
        Roster roster,
        IReadOnlyList<LessonPlacement>? locked,
        int weekDays)
    {
        ArgumentNullException.ThrowIfNull(catalog);
        ArgumentNullException.ThrowIfNull(map);
        ArgumentNullException.ThrowIfNull(roster);

        var classes = roster.Classes
            .Select(item => new PlannerClass(item.Id, item.Year, item.Letter, item.RoomId, item.PupilIds.Count))
            .ToArray();
        var teachers = roster.People
            .Where(person => person.IsStaff && person.Subjects.Count > 0)
            .Select(person => new PlannerTeacher(person.Id, person.Subjects))
            .ToArray();

        return TimetablePlanner.Build(catalog, map, classes, teachers, locked, weekDays);
    }
}