namespace StellaOps.ElkSharp;

internal static partial class ElkEdgeRouterIterative
{
    private static ElkRoutedEdge[] ApplyLeanHybridBaselinePostProcessing(
        ElkRoutedEdge[] edges,
        ElkPositionedNode[] nodes,
        ElkLayoutOptions layoutOptions)
    {
        var result = ElkEdgePostProcessor.AvoidNodeCrossings(edges, nodes, layoutOptions.Direction);
        result = ElkEdgePostProcessor.EliminateDiagonalSegments(result, nodes);
        result = ElkEdgePostProcessorSimplify.SimplifyEdgePaths(result, nodes);
        result = ElkEdgePostProcessorSimplify.TightenOuterCorridors(result, nodes);
        if (HighwayProcessingEnabled)
        {
            result = ElkEdgeRouterHighway.BreakShortHighways(result, nodes);
        }

        var serviceNodes = nodes.Where(n => n.Kind is not "Start" and not "End").ToArray();
        var minLineClearance = serviceNodes.Length > 0
            ? Math.Min(serviceNodes.Average(n => n.Width), serviceNodes.Average(n => n.Height)) / 2d
            : 50d;

        result = ElkEdgePostProcessor.NormalizeBoundaryAngles(result, nodes);
        result = ElkEdgePostProcessor.NormalizeSourceExitAngles(result, nodes);
        result = ElkEdgePostProcessor.SpreadSourceDepartureJoins(result, nodes, minLineClearance);
        result = ElkEdgePostProcessor.RepairBoundaryAnglesAndTargetApproaches(result, nodes, minLineClearance);
        result = RestoreProtectedRepeatCollectorCorridors(result, edges, nodes);
        result = ApplyHybridTerminalRuleCleanupRound(
            result,
            nodes,
            layoutOptions.Direction,
            minLineClearance);
        result = ChoosePreferredBoundarySlotRepairLayout(
            result,
            ApplyPostSlotDetourClosure(result, nodes, minLineClearance),
            nodes);
        result = ChoosePreferredBoundarySlotRepairLayout(
            result,
            ElkEdgePostProcessor.SnapBoundarySlotAssignments(
                result,
                nodes,
                minLineClearance,
                enforceAllNodeEndpoints: true),
            nodes);

        return result;
    }
}