import { system } from "@minecraft/server";

/** @param {number} playerYRotation */
function getPreciseRotation(playerYRotation) {
    if (playerYRotation < 0) playerYRotation += 360;
    const rotation = Math.round(playerYRotation / 22.5);

    return rotation !== 16 ? rotation : 0;
}

/** @type {import("@minecraft/server").BlockCustomComponent} */
const BlockShellRotationComponent = {
    beforeOnPlayerPlace(event) {
        const { player } = event;
        if (!player) return;

        const blockFace = event.permutationToPlace.getState(
            "minecraft:block_face"
        );
        if (blockFace !== "up") return;

        const playerYRotation = player.getRotation().y;
        const rotation = getPreciseRotation(playerYRotation);

        event.permutationToPlace = event.permutationToPlace.withState(
            "wiki:rotation",
            rotation
        );
    },
};

system.beforeEvents.startup.subscribe(({ blockComponentRegistry }) => {
    blockComponentRegistry.registerCustomComponent(
        "wiki:shell_rotation",
        BlockShellRotationComponent
    );
});