package wtf.hak.survivalfabric.features;

import net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientTickEvents;
import net.fabricmc.fabric.api.client.keybinding.v1.KeyBindingHelper;
import net.minecraft.client.MinecraftClient;
import net.minecraft.client.option.KeyBinding;
import net.minecraft.client.util.InputUtil;
import net.minecraft.text.Text;
import org.lwjgl.glfw.GLFW;
import org.spongepowered.asm.mixin.Unique;

import static wtf.hak.survivalfabric.config.client.ClientConfigManager.getConfig;

public class Zoom {

    private static final KeyBinding ZOOM_BIND = KeyBindingHelper.registerKeyBinding(new KeyBinding("key.survivalfabric.zoom", InputUtil.Type.KEYSYM, GLFW.GLFW_KEY_C, "category.survivalfabric.survivalfabric"));

    private static boolean SHOULD_ZOOM = false;
    private static int ZOOM_STEP = 0;

    @Unique
    private static boolean initialSmoothZoom;

    public static void register() {
        ClientTickEvents.END_CLIENT_TICK.register(client -> {

            if (ZOOM_BIND.isPressed() && !SHOULD_ZOOM) {
                if(getConfig().smoothCamera) {
                    initialSmoothZoom = MinecraftClient.getInstance().options.smoothCameraEnabled;
                    MinecraftClient.getInstance().options.smoothCameraEnabled = true;
                }
                SHOULD_ZOOM = true;
            } else if (!ZOOM_BIND.isPressed() && SHOULD_ZOOM) {
                SHOULD_ZOOM = false;
                ZOOM_STEP = 0;
                if(getConfig().smoothCamera) {
                    MinecraftClient.getInstance().options.smoothCameraEnabled = initialSmoothZoom;
                }
            }

        });
    }

    public static boolean isZooming() {
        return SHOULD_ZOOM;
    }

    public static float getZoomFov() {
        return getConfig().initialZoom - -ZOOM_STEP * getConfig().zoomStep;
    }

    public static void modifyStep(int step) {
        ZOOM_STEP += step;

        // Clamp the zoom level so the FOV stays within [1, 110]
        float zoomFov = getZoomFov();
        if (zoomFov < 1) {
            ZOOM_STEP = Math.round((1 - getConfig().initialZoom) / getConfig().zoomStep) + 1;
        } else if (zoomFov > 110) {
            ZOOM_STEP = Math.round((110 - getConfig().initialZoom) / getConfig().zoomStep);
        }
    }
}