package ru.bclib.config;

import net.minecraft.resources.ResourceLocation;
import org.jetbrains.annotations.NotNull;
import ru.bclib.util.Pair;

import java.util.Arrays;

public class ConfigKey {
	private final String path[];
	private final String entry;
	private final boolean root;
	
	public ConfigKey(String entry, String... path) {
		this.validate(entry);
		this.path = path;
		this.entry = entry;
		this.root = path.length == 0 || (path.length == 1 && path[0].isEmpty());
	}
	
	public ConfigKey(String entry, ResourceLocation path) {
		this(entry, path.getNamespace(), path.getPath());
	}
	
	public String[] getPath() {
		return path;
	}
	
	public String getEntry() {
		return entry;
	}
	
	public boolean isRoot() {
		return root;
	}
	
	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + Arrays.hashCode(path);
		result = prime * result + entry.hashCode();
		return result;
	}
	
	@Override
	public boolean equals(Object obj) {
		if (this == obj) {
			return true;
		}
		if (!(obj instanceof ConfigKey)) {
			return false;
		}
		ConfigKey other = (ConfigKey) obj;
		if (other.path.length != path.length) {
			return false;
		}
		for (int i = 0; i < path.length; i++) {
			if (!path[i].equals(other.path[i])) {
				return false;
			}
		}
		if (!entry.equals(other.entry)) {
			return false;
		}
		return true;
	}
	
	@Override
	public String toString() {
		if (root) {
			return String.format("[root]:%s", entry);
		}
		String p = path[0];
		for (int i = 1; i < path.length; i++) {
			p += "." + path[i];
		}
		return String.format("%s:%s", p, entry);
	}
	
	private void validate(String entry) {
		if (entry == null) {
			throw new NullPointerException("Config key must be not null!");
		}
		if (entry.isEmpty()) {
			throw new IndexOutOfBoundsException("Config key must be not empty!");
		}
	}
	
	public static Pair<String, String> realKey(@NotNull String key) {
		String[] parts = key.split("\\[default:", 2);
		if (parts.length == 1) {
			return new Pair(parts[0].trim(), "");
		}
		else if (parts.length == 2) {
			return new Pair(parts[0].trim(), " " + ("[default:" + parts[1]).trim());
		}
		return new Pair(key, "");
	}
}