const { generateUniquePolygonId, getAngleSumBetweenPositionAndVertices, isPointInArea2D } = require('./helpers');

require('./render');
require('./events');

class PolygonManager {
    pool: Polygon[] = new Array<Polygon>();

    add(vertices: Vector3Mp[], height: number, visible: boolean, lineColorRGBA: [number, number, number, number], dimension: number = 0) {

        const polygon: Polygon = {
            id: generateUniquePolygonId(),
            vertices,
            height,
            colliding: false,
            lineColorRGBA: lineColorRGBA,
            dimension: dimension,
            visible: visible
        }

        this.pool.push(polygon);

        return polygon;
    }

    remove(polygon: Polygon) {
        const index = this.pool.findIndex(p => p.id === polygon.id);

        if (index !== -1)
            this.pool.splice(index, 1);
    }

    exists(polygon: Polygon) {
        return this.pool.some(p => p.id === polygon.id)
    }

    isPositionWithinPolygon(position: Vector3Mp, polygon: Polygon, dimension: number) {
        if (dimension && polygon.dimension !== dimension && polygon.dimension !== -1)
            return false;

        const { vertices } = polygon;

        const polygonPoints2D = [];

        for (let i in vertices) {
            if (position.z >= vertices[i].z && position.z <= (vertices[i].z + polygon.height) || getAngleSumBetweenPositionAndVertices(position, vertices) >= 5.8)
                polygonPoints2D.push([vertices[i].x, vertices[i].y]);
            else
                return false;
        }

        return isPointInArea2D([position.x, position.y], polygonPoints2D);
    }
}

type Polygon = {
    id: number;
    vertices: Vector3Mp[];
    height: number;
    visible: boolean;
    colliding: boolean;
    dimension: number;
    lineColorRGBA: [number, number, number, number];
};

const polygons = new PolygonManager();

export default polygons;
export { Polygon };