package ovh.gasser.newshapes.shapes;

import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.MethodSource;

import java.awt.Rectangle;

import static org.junit.jupiter.api.Assertions.*;

/**
 * Parameterized contract tests verifying Shape interface invariants
 * across all implementations (SRectangle, SCircle, STriangle, SText, SCollection).
 */
class ShapeContractTest {

    @ParameterizedTest(name = "{0}")
    @MethodSource("ovh.gasser.newshapes.shapes.ShapeFactory#allShapes")
    void cloneReturnsIndependentCopy(Shape shape) {
        Shape cloned = shape.clone();

        // clone must not be the same instance
        assertNotSame(shape, cloned, "clone() must return a new instance");

        // clone must have equal bounds
        assertEquals(shape.getBounds(), cloned.getBounds(),
                "clone() must preserve bounds");

        // mutating the clone must not affect the original
        Rectangle originalBounds = shape.getBounds();
        cloned.translate(999, 999);
        assertEquals(originalBounds, shape.getBounds(),
                "Translating the clone must not affect the original's bounds");
    }

    @ParameterizedTest(name = "{0}")
    @MethodSource("ovh.gasser.newshapes.shapes.ShapeFactory#allShapes")
    void getBoundsReturnsCopy(Shape shape) {
        Rectangle bounds1 = shape.getBounds();
        Rectangle bounds2 = shape.getBounds();

        // successive calls must return equal bounds
        assertEquals(bounds1, bounds2,
                "getBounds() must return consistent values");

        // but not the same object (defensive copy)
        assertNotSame(bounds1, bounds2,
                "getBounds() must return a copy, not internal state");

        // mutating the returned Rectangle must not affect the shape
        bounds1.translate(500, 500);
        assertEquals(bounds2, shape.getBounds(),
                "Mutating the returned Rectangle must not affect the shape");
    }

    @ParameterizedTest(name = "{0}")
    @MethodSource("ovh.gasser.newshapes.shapes.ShapeFactory#allShapes")
    void translateMutatesInPlace(Shape shape) {
        Rectangle before = shape.getBounds();
        int dx = 7, dy = -3;

        shape.translate(dx, dy);

        Rectangle after = shape.getBounds();
        assertEquals(before.x + dx, after.x,
                "translate() must shift x by dx");
        assertEquals(before.y + dy, after.y,
                "translate() must shift y by dy");
        assertEquals(before.width, after.width,
                "translate() must not change width");
        assertEquals(before.height, after.height,
                "translate() must not change height");
    }
}