package ui.gui.widgets;

import java.awt.*;

/**
 * A builder for {@link GridBagConstraints}.
 */
public class GCBuilder {
    /**
     * Grix X and Y, defaults to {@link GridBagConstraints#RELATIVE}
     */
    private int gridX = GridBagConstraints.RELATIVE;

    private int gridY = GridBagConstraints.RELATIVE;

    /**
     * Weight X and Y, [0.0, 1.0], defaults to 0.0
     */
    private double weightX = 0.0;

    private double weightY = 0.0;

    /**
     * Anchor, defaults to {@link GridBagConstraints#CENTER}
     */
    private int anchor = GridBagConstraints.CENTER;

    /**
     * How to stretch the component, defaults to {@link GridBagConstraints#NONE}
     */
    private int fill = GridBagConstraints.NONE;

    /**
     * Insects in pixels.
     */
    private int insectTop = 0;

    private int insectLeft = 0;

    private int insectRight = 0;

    private int insectBottom = 0;

    /**
     * EFFECTS: Build the {@link GridBagConstraints} based on parameters.
     * Grid width, grid height, ipad X, ipad Y will be 1, 1, 0, 0.
     */
    public GridBagConstraints build() {
        return new GridBagConstraints(gridX, gridY,
                1, 1,
                weightX, weightY,
                anchor, fill,
                new Insets(insectTop, insectLeft, insectBottom, insectRight),
                0, 0);
    }

    /**
     * EFFECTS: Set grid X and Y.
     * REQUIRES: > 0
     * MODIFIES: this
     */
    public GCBuilder gridXY(int gridX, int gridY) {
        return this.gridX(gridX).gridY(gridY);
    }

    /**
     * EFFECTS: Set grid X.
     * REQUIRES: > 0
     * MODIFIES: this
     */
    public GCBuilder gridX(int gridX) {
        this.gridX = gridX;
        return this;
    }

    /**
     * EFFECTS: Set grid Y.
     * REQUIRES: > 0
     * MODIFIES: this
     */
    public GCBuilder gridY(int gridY) {
        this.gridY = gridY;
        return this;
    }

    /**
     * EFFECTS: Set weight X and Y.
     * REQUIRES: [0.0, 1.0]
     * MODIFIES: this
     */
    public GCBuilder weightXY(double weightX, double weightY) {
        return this.weightX(weightX).weightY(weightY);
    }

    /**
     * EFFECTS: Set weight X and Y to 1.0
     * MODIFIES: this
     */
    public GCBuilder expandXY() {
        return this.expandX().expandY();
    }

    /**
     * EFFECTS: Set weight X to 1.0
     * MODIFIES: this
     */
    public GCBuilder expandX() {
        return this.weightX(1.0);
    }

    /**
     * EFFECTS: Set weight X to 1.0
     * MODIFIES: this
     */
    public GCBuilder weightX(double weightX) {
        this.weightX = weightX;
        return this;
    }

    /**
     * EFFECTS: Set weight Y to 1.0
     * MODIFIES: this
     */
    public GCBuilder expandY() {
        return this.weightY(1.0);
    }

    /**
     * EFFECTS: Set weight X to 1.0
     * MODIFIES: this
     */
    public GCBuilder weightY(double weightY) {
        this.weightY = weightY;
        return this;
    }

    /**
     * EFFECTS: Set anchor.
     * REQUIRES: anchor in {@link GridBagConstraints} constants.
     * MODIFIES: this
     */
    public GCBuilder anchor(int anchor) {
        this.anchor = anchor;
        return this;
    }

    /**
     * EFFECTS: Set fill.
     * REQUIRES: fill in {@link GridBagConstraints} constants.
     * MODIFIES: this
     */
    public GCBuilder fill(int fill) {
        this.fill = fill;
        return this;
    }

    /**
     * EFFECTS: Set insects to be 8, 8, 8, 8
     * MODIFIES: this
     */
    public GCBuilder marginInsects() {
        return this.insects(8, 8, 8, 8);
    }

    /**
     * EFFECTS: Set insects.
     * REQUIRES: >= 0
     * MODIFIES: this
     */
    public GCBuilder insects(int top, int left, int bottom, int right) {
        return this.insectTop(top).insectLeft(left).insectBottom(bottom).insectRight(right);
    }

    /**
     * EFFECTS: Set top insect
     * REQUIRES: >= 0
     * MODIFIES: this
     */
    public GCBuilder insectTop(int insectTop) {
        this.insectTop = insectTop;
        return this;
    }

    /**
     * EFFECTS: Set left insect
     * REQUIRES: >= 0
     * MODIFIES: this
     */
    public GCBuilder insectLeft(int insectLeft) {
        this.insectLeft = insectLeft;
        return this;
    }

    /**
     * EFFECTS: Set right insect
     * REQUIRES: >= 0
     * MODIFIES: this
     */
    public GCBuilder insectRight(int insectRight) {
        this.insectRight = insectRight;
        return this;
    }

    /**
     * EFFECTS: Set bottom insect
     * REQUIRES: >= 0
     * MODIFIES: this
     */
    public GCBuilder insectBottom(int insectBottom) {
        this.insectBottom = insectBottom;
        return this;
    }
}