package net.minecraft.world.phys.shapes;

import net.minecraft.core.BlockPos;
import net.minecraft.world.entity.Entity;
import net.minecraft.world.entity.LivingEntity;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.entity.vehicle.minecart.AbstractMinecart;
import net.minecraft.world.item.Item;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.level.CollisionGetter;
import net.minecraft.world.level.block.state.BlockState;
import net.minecraft.world.level.material.FluidState;
import org.jspecify.annotations.Nullable;

public interface CollisionContext {
	static CollisionContext empty() {
		return EntityCollisionContext.Empty.WITHOUT_FLUID_COLLISIONS;
	}

	static CollisionContext emptyWithFluidCollisions() {
		return EntityCollisionContext.Empty.WITH_FLUID_COLLISIONS;
	}

	static CollisionContext of(final Entity entity) {
		return (CollisionContext)(switch (entity) {
			case AbstractMinecart minecart -> AbstractMinecart.useExperimentalMovement(minecart.level())
				? new MinecartCollisionContext(minecart, false)
				: new EntityCollisionContext(entity, false, false);
			default -> new EntityCollisionContext(entity, false, false);
		});
	}

	static CollisionContext of(final Entity entity, final boolean alwaysCollideWithFluid) {
		return new EntityCollisionContext(entity, alwaysCollideWithFluid, false);
	}

	static CollisionContext placementContext(@Nullable final Player player) {
		return new EntityCollisionContext(
			player != null ? player.isDescending() : false,
			true,
			player != null ? player.getY() : -Double.MAX_VALUE,
			player != null ? player.getMainHandItem() : ItemStack.EMPTY,
			false,
			player
		);
	}

	static CollisionContext withPosition(@Nullable final Entity entity, final double position) {
		return new EntityCollisionContext(
			entity != null ? entity.isDescending() : false,
			true,
			entity != null ? position : -Double.MAX_VALUE,
			entity instanceof LivingEntity livingEntity ? livingEntity.getMainHandItem() : ItemStack.EMPTY,
			false,
			entity
		);
	}

	boolean isDescending();

	boolean isAbove(final VoxelShape shape, final BlockPos pos, final boolean defaultValue);

	boolean isHoldingItem(final Item item);

	boolean alwaysCollideWithFluid();

	boolean canStandOnFluid(final FluidState fluidStateAbove, final FluidState fluid);

	VoxelShape getCollisionShape(BlockState state, CollisionGetter collisionGetter, BlockPos pos);

	default boolean isPlacement() {
		return false;
	}
}