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package ext.test4j.hamcrest.core;

import static ext.test4j.hamcrest.core.AllOf.allOf;
import static ext.test4j.hamcrest.core.IsEqual.equalTo;

import java.util.ArrayList;
import java.util.List;

import ext.test4j.hamcrest.Description;
import ext.test4j.hamcrest.Factory;
import ext.test4j.hamcrest.Matcher;
import ext.test4j.hamcrest.TypeSafeDiagnosingMatcher;

@SuppressWarnings("rawtypes")
public class IsCollectionContaining extends TypeSafeDiagnosingMatcher> {
	private final Matcher elementMatcher;

	public IsCollectionContaining(Matcher elementMatcher) {
		this.elementMatcher = elementMatcher;
	}

	@Override
	protected boolean matchesSafely(Iterable collection, Description mismatchDescription) {
		boolean isPastFirst = false;
		for (Object item : collection) {
			if (elementMatcher.matches(item)) {
				return true;
			}
			if (isPastFirst) {
				mismatchDescription.appendText(", ");
			}
			elementMatcher.describeMismatch(item, mismatchDescription);
			isPastFirst = true;
		}
		return false;
	}

	public void describeTo(Description description) {
		description.appendText("a collection containing ").appendDescriptionOf(elementMatcher);
	}

	@Factory
	public static  Matcher> hasItem(Matcher elementMatcher) {
		return new IsCollectionContaining(elementMatcher);
	}

	@Factory
	public static  Matcher> hasItem(T element) {
		// Doesn't forward to hasItem() method so compiler can sort out
		// generics.
		return new IsCollectionContaining(equalTo(element));
	}

	@SuppressWarnings("unchecked")
	@Factory
	public static  Matcher> hasItems(Matcher... elementMatchers) {
		List all = new ArrayList(elementMatchers.length);

		for (Matcher elementMatcher : elementMatchers) {
			// Doesn't forward to hasItem() method so compiler can sort out
			// generics.
			all.add(new IsCollectionContaining(elementMatcher));
		}

		return allOf(all);
	}

	@Factory
	public static  Matcher> hasItems(T... elements) {
		List all = new ArrayList(elements.length);
		for (T element : elements) {
			all.add(hasItem(element));
		}

		return allOf(all);
	}
}