import { fromSides } from '../shape/from-sides.js';
import { Shape } from '../shape/shape.js';
import { ErrorSeed } from './errors.js';
import { rotateShape } from '../shape/rotate-shape.js';
import { ShapeType } from '../types/shape-type.js';

const { sqrt } = Math;
const SQRT3 = sqrt(3);


const seedShapes = {
    3:  { ps: rotateShape(-2,  fromSides(3)),  θm: 0 },
    4:  { ps: rotateShape(9,   fromSides(4)),  θm: 0 },
    6:  { ps: rotateShape(6,   fromSides(6)),  θm: -6 },
    8:  { ps: rotateShape(7.5, fromSides(8)),  θm: 0 },
    12: { ps: rotateShape(7,   fromSides(12)), θm: 0 }
}


/**
 * Returns a seed shape based on the given number of sides.
 * 
 * * the side length of the returned shapes === 1
 */
function getSeedShape(sides: ShapeType): Shape {
    if (sides !== 3 && sides !== 4 && sides !== 6 && sides !== 8 && sides !== 12) {
        throw ErrorSeed();
    }

    return {
        sides,
        // c: sides === 3 ? [0.5, SQRT3/2] : [0,0],
        c: sides === 3 ? [SQRT3/6, 0.5] : [0,0],
        θm: sides === 3 ? 2 : sides === 6 ? -6 : 0,
        stage: 0,
        stagePlacement: 1
    };
}


export { getSeedShape, seedShapes }