using Godot;

namespace WorldSim;

/// <summary>
/// World-state serialization (SPEC §9 amendment).
/// "The world is the save file" — persistence is a first-class MVP system,
/// not a Phase 4 afterthought. Baseline test: save → load → the simulation
/// continues identically (round-trip).
///
/// TODO(Week 4): serialize World.Nodes, Npcs (position, state, inventory,
/// fatigue, health, imprint triad), Buildings, and TotalTicks to JSON at
/// user://worldsim_save.json; load must rebuild identical state.
/// Design note carried from DESIGN.md: when object imprint histories arrive
/// (Phase 3), old imprints compress into net values + a few significant
/// preserved entries — "what the world remembers in detail vs. aggregate"
/// is a design decision expressed as a data policy.
/// </summary>
public static class SaveSystem
{
    public static string SavePath => "user://worldsim_save.json";

    public static void Save(GameManager gm)
    {
        // TODO(Week 4): implement JSON round-trip.
        GD.Print("[SaveSystem] Save not yet implemented.");
    }

    public static bool TryLoad(GameManager gm)
    {
        // TODO(Week 4): implement JSON round-trip.
        return false;
    }
}