using System;
using System.Threading;
using OpenNest.Engine.Jobs;

namespace OpenNest.Engine.Terra;

/// <summary>
/// TODO: name and describe the actual placement strategy here (e.g. "skyline packer with
/// greedy shelf assignment", "NFP-based sliding placement with simulated-annealing order
/// search", etc). This must be an independently designed algorithm — see README.md.
/// </summary>
public sealed class TerraNestingEngine : INestingEngine
{
    public NestJobResult Solve(
        NestJob job,
        IProgress<NestJobProgress>? progress = null,
        CancellationToken token = default
    )
    {
        ArgumentNullException.ThrowIfNull(job);

        // TODO: implement independent placement logic here.
        //
        // Do NOT call NestingEngineRegistry.Create(...), PlateNesterFactory, PlateFillService,
        // or any built-in INestingEngine, and do not run several and keep the best. The
        // Fill/ and pattern components (FillLinear, PairFiller, PatternTiler, Compactor, ...)
        // and OpenNest.Core geometry ARE fair game as tools; the decisions are yours.
        //
        // job.Parts        -> requested parts (PartGeometrySnapshot geometry, quantity, priority, rotation policy)
        // job.Plates        -> candidate stock sheets (size, spacing, quadrant, quantity)
        // job.Options       -> job-wide options
        //
        // Return a NestJobResult built from NestJobPlateResult (one per used sheet, holding
        // ordered NestJobPlacement values), PartFulfillment (requested vs placed per part id),
        // and StockUsage (sheets used per stock id).

        throw new NotImplementedException(
            "Terra nesting engine placement logic not yet implemented."
        );
    }
}