package net.knarcraft.blacksmith.util;

import org.bukkit.Bukkit;
import org.bukkit.Material;
import org.bukkit.NamespacedKey;
import org.bukkit.Registry;
import org.bukkit.enchantments.Enchantment;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

/**
 * A helper class for parsing input into proper object types
 */
public final class InputParsingHelper {

    private InputParsingHelper() {

    }

    /**
     * Gets whether the input is an "empty" value treated as null
     *
     * @param input <p>The input to check</p>
     * @return <p>True if the value is empty</p>
     */
    public static boolean isEmpty(@Nullable String input) {
        return input == null || input.equalsIgnoreCase("null") || input.equals("\"\"") ||
                input.isBlank() || input.equals("-1");
    }

    /**
     * Tries to find the material matching the given input string
     *
     * @param input <p>The string to match to a material</p>
     * @return <p>The material matching the string, or null if not found</p>
     */
    public static @Nullable Material matchMaterial(@NotNull String input) {
        return Material.matchMaterial(input.replace("-", "_"));
    }

    /**
     * Tries to find the enchantment matching the given input string
     *
     * @param input <p>The string to match to an enchantment</p>
     * @return <p>The enchantment matching the string, or null if not found</p>
     */
    public static @Nullable Enchantment matchEnchantment(@NotNull String input) {
        try {
            Registry<Enchantment> enchantments = Bukkit.getRegistry(Enchantment.class);
            if (enchantments == null) {
                throw new RuntimeException("Unable to get enchantment registry");
            }
            return enchantments.get(NamespacedKey.minecraft(
                    input.replace("-", "_").replace(" ", "_").toLowerCase()));
        } catch (IllegalArgumentException exception) {
            //Invalid characters, such as : will normally throw an illegal argument exception
            return null;
        }
    }

    /**
     * Converts a material name like "*helmet" into a regular expression ".*HELMET"
     *
     * @param input <p>The input to RegExIfy</p>
     * @return <p>The converted input</p>
     */
    public static @NotNull String regExIfy(@NotNull String input) {
        return input.replace("*", ".*").toUpperCase().replace("-", "_");
    }

}