/*
 * This file is part of fabric-loom, licensed under the MIT License (MIT).
 *
 * Copyright (c) 2016-2021 FabricMC
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package net.fabricmc.loom.configuration.providers.mappings.mojmap;

import java.io.UncheckedIOException;
import java.nio.file.Path;

import net.fabricmc.loom.api.mappings.layered.MappingContext;
import net.fabricmc.loom.api.mappings.layered.spec.MappingsSpec;
import net.fabricmc.loom.configuration.providers.minecraft.MinecraftVersionMeta;
import net.fabricmc.loom.util.download.DownloadException;

public record MojangMappingsSpec(SilenceLicenseOption silenceLicense, boolean nameSyntheticMembers) implements MappingsSpec<MojangMappingLayer> {
	// Keys in dependency manifest
	private static final String MANIFEST_CLIENT_MAPPINGS = "client_mappings";
	private static final String MANIFEST_SERVER_MAPPINGS = "server_mappings";

	public MojangMappingsSpec(SilenceLicenseSupplier supplier, boolean nameSyntheticMembers) {
		this(new SilenceLicenseOption(supplier), nameSyntheticMembers);
	}

	public MojangMappingsSpec(boolean nameSyntheticMembers) {
		this(() -> false, nameSyntheticMembers);
	}

	@FunctionalInterface
	public interface SilenceLicenseSupplier {
		boolean isSilent();
	}

	public record SilenceLicenseOption(SilenceLicenseSupplier supplier) {
		public boolean isSilent() {
			return supplier.isSilent();
		}

		@Override
		public boolean equals(Object o) {
			if (this == o) return true;
			if (!(o instanceof SilenceLicenseOption that)) return false;
			return isSilent() == that.isSilent();
		}

		@Override
		public int hashCode() {
			return Boolean.hashCode(isSilent());
		}

		@Override
		public String toString() {
			return isSilent() + "";
		}
	}

	@Override
	public MojangMappingLayer createLayer(MappingContext context) {
		final MinecraftVersionMeta versionInfo = context.minecraftProvider().getVersionInfo();
		final MinecraftVersionMeta.Download clientDownload = versionInfo.download(MANIFEST_CLIENT_MAPPINGS);
		final MinecraftVersionMeta.Download serverDownload = versionInfo.download(MANIFEST_SERVER_MAPPINGS);

		if (clientDownload == null) {
			throw new RuntimeException("Failed to find official mojang mappings for " + context.minecraftVersion());
		}

		final Path clientMappings = context.workingDirectory("mojang").resolve("client.txt");
		final Path serverMappings = context.workingDirectory("mojang").resolve("server.txt");

		try {
			context.download(clientDownload.url())
					.sha1(clientDownload.sha1())
					.downloadPath(clientMappings);

			context.download(serverDownload.url())
					.sha1(serverDownload.sha1())
					.downloadPath(serverMappings);
		} catch (DownloadException e) {
			throw new UncheckedIOException("Failed to download mappings", e);
		}

		return new MojangMappingLayer(
				context.minecraftVersion(),
				clientMappings,
				serverMappings,
				nameSyntheticMembers(),
				context.getLogger(),
				silenceLicense()
		);
	}
}
