package org.argeo.api.a2;

import java.util.Collections;
import java.util.Map;
import java.util.TreeMap;

/**
 * A category grouping a set of {@link A2Component}, typically based on the
 * provider of these components. This is the equivalent of Maven's group Id.
 */
public class A2Contribution implements Comparable<A2Contribution> {
	final static String BOOT = "boot";
	final static String RUNTIME = "runtime";
	final static String CLASSPATH = "classpath";

	final static String DEFAULT = "default";
	final static String LIB = "lib";

	private final ProvisioningSource source;
	private final String id;

	final Map<String, A2Component> components = Collections.synchronizedSortedMap(new TreeMap<>());

	/**
	 * The contribution must be added to the source. Rather use
	 * {@link AbstractProvisioningSource#getOrAddContribution(String)} than this
	 * contructor directly.
	 */
	public A2Contribution(ProvisioningSource context, String id) {
		this.source = context;
		this.id = id;
//		if (context != null)
//			context.contributions.put(id, this);
	}

	public Iterable<A2Component> listComponents(Object filter) {
		return components.values();
	}

	A2Component getOrAddComponent(String componentId) {
		if (components.containsKey(componentId))
			return components.get(componentId);
		else
			return new A2Component(this, componentId);
	}

	public ProvisioningSource getSource() {
		return source;
	}

	public String getId() {
		return id;
	}

	@Override
	public int compareTo(A2Contribution o) {
		return id.compareTo(o.id);
	}

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

	@Override
	public boolean equals(Object obj) {
		if (obj instanceof A2Contribution) {
			A2Contribution o = (A2Contribution) obj;
			return id.equals(o.id);
		} else
			return false;
	}

	@Override
	public String toString() {
		return id;
	}

	void asTree(String prefix, StringBuffer buf) {
		if (prefix == null)
			prefix = "";
		for (String componentId : components.keySet()) {
			buf.append(prefix);
			buf.append(componentId);
			A2Component component = components.get(componentId);
			component.asTree(prefix, buf);
			buf.append('\n');
		}
	}

	static String localOsArchRelativePath() {
		return Os.local().toString() + "/" + Arch.local().toString();
	}

	/** Well-known operating systems. */
	static enum Os {
		LINUX, WIN32, MACOSX, UNKOWN;

		@Override
		public String toString() {
			return name().toLowerCase();
		}

		/** The local operating system. */
		public static Os local() {
			String osStr = System.getProperty("os.name").toLowerCase();
			if (osStr.startsWith("linux"))
				return LINUX;
			if (osStr.startsWith("win"))
				return WIN32;
			if (osStr.startsWith("mac"))
				return MACOSX;
			return UNKOWN;
		}

	}

	/** Well-known processor architectures. */
	static enum Arch {
		X86_64, AARCH64, X86, POWERPC, UNKOWN;

		@Override
		public String toString() {
			return name().toLowerCase();
		}

		/** The locla processor architecture. */
		public static Arch local() {
			String archStr = System.getProperty("os.arch").toLowerCase();
			return switch (archStr) {
			case "x86_64":
			case "amd64":
			case "x86-64": {
				yield X86_64;
			}
			case "aarch64":
			case "arm64": {
				yield AARCH64;
			}
			case "x86":
			case "i386":
			case "i686": {
				yield X86;
			}
			case "powerpc":
			case "ppc": {
				yield POWERPC;
			}
			default:
				yield UNKOWN;
			};
		}
	}

}