package net.minecraft.util;

import java.util.function.Supplier;
import org.apache.commons.lang3.ObjectUtils;

public record ModCheck(ModCheck.Confidence confidence, String description) {
	public static ModCheck identify(final String expectedBrand, final Supplier<String> actualBrand, final String component, final Class<?> canaryClass) {
		String mod = (String)actualBrand.get();
		if (!expectedBrand.equals(mod)) {
			return new ModCheck(ModCheck.Confidence.DEFINITELY, component + " brand changed to '" + mod + "'");
		} else {
			return canaryClass.getSigners() == null
				? new ModCheck(ModCheck.Confidence.VERY_LIKELY, component + " jar signature invalidated")
				: new ModCheck(ModCheck.Confidence.PROBABLY_NOT, component + " jar signature and brand is untouched");
		}
	}

	public boolean shouldReportAsModified() {
		return this.confidence.shouldReportAsModified;
	}

	public ModCheck merge(final ModCheck other) {
		return new ModCheck(ObjectUtils.max(this.confidence, other.confidence), this.description + "; " + other.description);
	}

	public String fullDescription() {
		return this.confidence.description + " " + this.description;
	}

	public static enum Confidence {
		PROBABLY_NOT("Probably not.", false),
		VERY_LIKELY("Very likely;", true),
		DEFINITELY("Definitely;", true);

		private final String description;
		private final boolean shouldReportAsModified;

		private Confidence(final String description, final boolean shouldReportAsModified) {
			this.description = description;
			this.shouldReportAsModified = shouldReportAsModified;
		}
	}
}