import { WORLD, VIEWPORT } from "./config.js";

export function createPlatforms() {
    const result = [];
    const count = 16;
    const spacing = 145;

    for (let index = 0; index < count; index += 1) {
        const width = index === 0 ? 220 : 150 + (index % 4) * 34;
        const x = index === 0 ? (WORLD.width - width) / 2 : 40 + ((index * 173) % (WORLD.width - width - 80));
        const y = WORLD.height - 70 - index * spacing;

        result.push({
            id: index + 1,
            x,
            y,
            width,
            height: 22,
        });
    }

    return result;
}

export function getVisiblePlatforms(platforms, camera) {
    return platforms
        .filter((platform) => isPlatformVisible(platform, camera))
        .map((platform) => ({
            ...platform,
            local: worldToViewport(platform, camera),
        }));
}

export function isPlatformVisible(platform, camera) {
    return (
        platform.x + platform.width >= camera.x &&
        platform.x <= camera.x + VIEWPORT.width &&
        platform.y + platform.height >= camera.y &&
        platform.y <= camera.y + VIEWPORT.height
    );
}

export function worldToViewport(point, camera) {
    return {
        x: point.x - camera.x,
        y: point.y - camera.y,
    };
}