import React, { useEffect } from "react";
import { init as initRecastNavigation } from "@recast-navigation/core";
import { generateSoloNavMesh } from "@recast-navigation/generators";
import { DebugDrawer, getPositionsAndIndices } from "@recast-navigation/three";
import { useThree } from "@react-three/fiber";
import * as THREE from "three";
import * as Types from "../../../../types/world/worldTypes";

interface NavMeshDetailsProps {
    setNavMesh: (navMesh: any) => void;
    groupRef: React.MutableRefObject<THREE.Group | null>;
    lines: Types.RefLines;
}

export default function NavMeshDetails({
    lines,
    setNavMesh,
    groupRef,
}: NavMeshDetailsProps) {
    const { scene } = useThree();

    useEffect(() => {
        const initializeNavigation = async () => {
            try {
                await initRecastNavigation();

                if (!groupRef.current || groupRef.current.children.length === 0) {
                    return;
                }

                const meshes = groupRef?.current?.children as THREE.Mesh[];

                const [positions, indices] = getPositionsAndIndices(meshes);

                const cellSize = 0.2;
                const cellHeight = 0.7;
                const walkableRadius = 0.5;
                const { success, navMesh } = generateSoloNavMesh(positions, indices, {
                    cs: cellSize,
                    ch: cellHeight,
                    walkableRadius: Math.round(walkableRadius / cellHeight),
                });

                if (!success || !navMesh) {
                    return;
                }

                setNavMesh(navMesh);

                scene.children
                    .filter((child) => child instanceof DebugDrawer)
                    .forEach((child) => scene.remove(child));

                const debugDrawer = new DebugDrawer();
                debugDrawer.drawNavMesh(navMesh);
                // scene.add(debugDrawer);
            } catch (error) { }
        };

        initializeNavigation();
    }, [scene, groupRef, lines.current]);

    return null;
}