package net.minecraft.resources;

import com.mojang.brigadier.StringReader;
import com.mojang.brigadier.exceptions.CommandSyntaxException;
import com.mojang.brigadier.exceptions.SimpleCommandExceptionType;
import com.mojang.serialization.Codec;
import com.mojang.serialization.DataResult;
import io.netty.buffer.ByteBuf;
import java.util.function.UnaryOperator;
import net.minecraft.ResourceLocationException;
import net.minecraft.network.chat.Component;
import net.minecraft.network.codec.ByteBufCodecs;
import net.minecraft.network.codec.StreamCodec;
import org.jetbrains.annotations.Nullable;

/**
 * An immutable location of a resource, in terms of a path and namespace.
 * <p>
 * This is used as an identifier for a resource, usually for those housed in a {@link net.minecraft.core.Registry}, such as blocks and items.
 * <p>
 * {@code minecraft} is always taken as the default namespace for a resource location when none is explicitly stated. When using this for registering objects, this namespace <strong>should</strong> only be used for resources added by Minecraft itself.
 * <p>
 * Generally, and by the implementation of {@link #toString()}, the string representation of this class is expressed in the form {@code namespace:path}. The colon is also used as the default separator for parsing strings as a {@code ResourceLocation}.
 * @see net.minecraft.resources.ResourceKey
 */
public final class ResourceLocation implements Comparable<ResourceLocation> {
	public static final Codec<ResourceLocation> CODEC = Codec.STRING.<ResourceLocation>comapFlatMap(ResourceLocation::read, ResourceLocation::toString).stable();
	public static final StreamCodec<ByteBuf, ResourceLocation> STREAM_CODEC = ByteBufCodecs.STRING_UTF8.map(ResourceLocation::parse, ResourceLocation::toString);
	public static final SimpleCommandExceptionType ERROR_INVALID = new SimpleCommandExceptionType(Component.translatable("argument.id.invalid"));
	public static final char NAMESPACE_SEPARATOR = ':';
	public static final String DEFAULT_NAMESPACE = "minecraft";
	public static final String REALMS_NAMESPACE = "realms";
	private final String namespace;
	private final String path;

	private ResourceLocation(String namespace, String path) {
		assert isValidNamespace(namespace);

		assert isValidPath(path);

		this.namespace = namespace;
		this.path = path;
	}

	private static ResourceLocation createUntrusted(String namespace, String path) {
		return new ResourceLocation(assertValidNamespace(namespace, path), assertValidPath(namespace, path));
	}

	public static ResourceLocation fromNamespaceAndPath(String namespace, String path) {
		return createUntrusted(namespace, path);
	}

	public static ResourceLocation parse(String location) {
		return bySeparator(location, ':');
	}

	public static ResourceLocation withDefaultNamespace(String location) {
		return new ResourceLocation("minecraft", assertValidPath("minecraft", location));
	}

	/**
	 * Attempts to parse the specified {@code location} as a {@code ResourceLocation} by splitting it into a
	 * namespace and path by a colon.
	 * <p>
	 * If no colon is present in the {@code location}, the namespace defaults to {@code minecraft}, taking the {@code location} as the path.
	 * @return the parsed resource location; otherwise {@code null} if there is a non {@code [a-z0-9_.-]} character in the decomposed namespace or a non {@code [a-z0-9/._-]} character in the decomposed path
	 * @see #of(String, char)
	 * 
	 * @param location the location string to try to parse as a {@code ResourceLocation}
	 */
	@Nullable
	public static ResourceLocation tryParse(String location) {
		return tryBySeparator(location, ':');
	}

	@Nullable
	public static ResourceLocation tryBuild(String namespace, String path) {
		return isValidNamespace(namespace) && isValidPath(path) ? new ResourceLocation(namespace, path) : null;
	}

	public static ResourceLocation bySeparator(String location, char seperator) {
		int i = location.indexOf(seperator);
		if (i >= 0) {
			String string = location.substring(i + 1);
			if (i != 0) {
				String string2 = location.substring(0, i);
				return createUntrusted(string2, string);
			} else {
				return withDefaultNamespace(string);
			}
		} else {
			return withDefaultNamespace(location);
		}
	}

	@Nullable
	public static ResourceLocation tryBySeparator(String location, char seperator) {
		int i = location.indexOf(seperator);
		if (i >= 0) {
			String string = location.substring(i + 1);
			if (!isValidPath(string)) {
				return null;
			} else if (i != 0) {
				String string2 = location.substring(0, i);
				return isValidNamespace(string2) ? new ResourceLocation(string2, string) : null;
			} else {
				return new ResourceLocation("minecraft", string);
			}
		} else {
			return isValidPath(location) ? new ResourceLocation("minecraft", location) : null;
		}
	}

	public static DataResult<ResourceLocation> read(String location) {
		try {
			return DataResult.success(parse(location));
		} catch (ResourceLocationException var2) {
			return DataResult.error(() -> "Not a valid resource location: " + location + " " + var2.getMessage());
		}
	}

	public String getPath() {
		return this.path;
	}

	public String getNamespace() {
		return this.namespace;
	}

	public ResourceLocation withPath(String path) {
		return new ResourceLocation(this.namespace, assertValidPath(this.namespace, path));
	}

	public ResourceLocation withPath(UnaryOperator<String> pathOperator) {
		return this.withPath((String)pathOperator.apply(this.path));
	}

	public ResourceLocation withPrefix(String pathPrefix) {
		return this.withPath(pathPrefix + this.path);
	}

	public ResourceLocation withSuffix(String pathSuffix) {
		return this.withPath(this.path + pathSuffix);
	}

	public String toString() {
		return this.namespace + ":" + this.path;
	}

	public boolean equals(Object object) {
		if (this == object) {
			return true;
		} else {
			return !(object instanceof ResourceLocation resourceLocation)
				? false
				: this.namespace.equals(resourceLocation.namespace) && this.path.equals(resourceLocation.path);
		}
	}

	public int hashCode() {
		return 31 * this.namespace.hashCode() + this.path.hashCode();
	}

	public int compareTo(ResourceLocation other) {
		int i = this.path.compareTo(other.path);
		if (i == 0) {
			i = this.namespace.compareTo(other.namespace);
		}

		return i;
	}

	public String toDebugFileName() {
		return this.toString().replace('/', '_').replace(':', '_');
	}

	public String toLanguageKey() {
		return this.namespace + "." + this.path;
	}

	public String toShortLanguageKey() {
		return this.namespace.equals("minecraft") ? this.path : this.toLanguageKey();
	}

	public String toLanguageKey(String type) {
		return type + "." + this.toLanguageKey();
	}

	public String toLanguageKey(String type, String key) {
		return type + "." + this.toLanguageKey() + "." + key;
	}

	private static String readGreedy(StringReader reader) {
		int i = reader.getCursor();

		while (reader.canRead() && isAllowedInResourceLocation(reader.peek())) {
			reader.skip();
		}

		return reader.getString().substring(i, reader.getCursor());
	}

	public static ResourceLocation read(StringReader reader) throws CommandSyntaxException {
		int i = reader.getCursor();
		String string = readGreedy(reader);

		try {
			return parse(string);
		} catch (ResourceLocationException var4) {
			reader.setCursor(i);
			throw ERROR_INVALID.createWithContext(reader);
		}
	}

	public static ResourceLocation readNonEmpty(StringReader reader) throws CommandSyntaxException {
		int i = reader.getCursor();
		String string = readGreedy(reader);
		if (string.isEmpty()) {
			throw ERROR_INVALID.createWithContext(reader);
		} else {
			try {
				return parse(string);
			} catch (ResourceLocationException var4) {
				reader.setCursor(i);
				throw ERROR_INVALID.createWithContext(reader);
			}
		}
	}

	public static boolean isAllowedInResourceLocation(char character) {
		return character >= '0' && character <= '9'
			|| character >= 'a' && character <= 'z'
			|| character == '_'
			|| character == ':'
			|| character == '/'
			|| character == '.'
			|| character == '-';
	}

	/**
	 * @return {@code true} if the specified {@code path} is valid: consists only of {@code [a-z0-9/._-]} characters
	 */
	public static boolean isValidPath(String path) {
		for (int i = 0; i < path.length(); i++) {
			if (!validPathChar(path.charAt(i))) {
				return false;
			}
		}

		return true;
	}

	/**
	 * @return {@code true} if the specified {@code namespace} is valid: consists only of {@code [a-z0-9_.-]} characters
	 */
	public static boolean isValidNamespace(String namespace) {
		for (int i = 0; i < namespace.length(); i++) {
			if (!validNamespaceChar(namespace.charAt(i))) {
				return false;
			}
		}

		return true;
	}

	private static String assertValidNamespace(String namespace, String path) {
		if (!isValidNamespace(namespace)) {
			throw new ResourceLocationException("Non [a-z0-9_.-] character in namespace of location: " + namespace + ":" + path);
		} else {
			return namespace;
		}
	}

	public static boolean validPathChar(char pathChar) {
		return pathChar == '_' || pathChar == '-' || pathChar >= 'a' && pathChar <= 'z' || pathChar >= '0' && pathChar <= '9' || pathChar == '/' || pathChar == '.';
	}

	private static boolean validNamespaceChar(char namespaceChar) {
		return namespaceChar == '_'
			|| namespaceChar == '-'
			|| namespaceChar >= 'a' && namespaceChar <= 'z'
			|| namespaceChar >= '0' && namespaceChar <= '9'
			|| namespaceChar == '.';
	}

	private static String assertValidPath(String namespace, String path) {
		if (!isValidPath(path)) {
			throw new ResourceLocationException("Non [a-z0-9/._-] character in path of location: " + namespace + ":" + path);
		} else {
			return path;
		}
	}
}