export enum LabelTextAlignment {
    LEFT = 'left',
    RIGHT = 'right',
    CENTER = 'center'
}

export enum LabelLineTerminator {
    NONE = 'none',
    CIRCLE = 'circle',
    RING = 'ring'
}

export enum LabelAnchorFlag {
    NONE = 0,
    LEFT = 1 << 0,
    CENTER = 1 << 1,
    RIGHT = 1 << 2,
    TOP = 1 << 3,
    MIDDLE = 1 << 4,
    BOTTOM = 1 << 5
}

export enum LabelAnchorPoint {
    NONE = LabelAnchorFlag.NONE,
    TOPLEFT = LabelAnchorFlag.TOP | LabelAnchorFlag.LEFT,
    TOPCENTER = LabelAnchorFlag.TOP | LabelAnchorFlag.CENTER,
    TOPRIGHT = LabelAnchorFlag.TOP | LabelAnchorFlag.RIGHT,
    MIDDLELEFT = LabelAnchorFlag.MIDDLE | LabelAnchorFlag.LEFT,
    MIDDLECENTER = LabelAnchorFlag.MIDDLE | LabelAnchorFlag.CENTER,
    MIDDLERIGHT = LabelAnchorFlag.MIDDLE | LabelAnchorFlag.RIGHT,
    BOTTOMLEFT = LabelAnchorFlag.BOTTOM | LabelAnchorFlag.LEFT,
    BOTTOMCENTER = LabelAnchorFlag.BOTTOM | LabelAnchorFlag.CENTER,
    BOTTOMRIGHT = LabelAnchorFlag.BOTTOM | LabelAnchorFlag.RIGHT
}

/**
 * Class representing label style.
 * @ignore
 */
export class NVLabel3DStyle {
    textColor: number[]
    textScale: number
    textAlignment?: LabelTextAlignment
    lineWidth: number
    lineColor: number[]
    lineTerminator: LabelLineTerminator
    bulletScale?: number
    bulletColor?: number[]
    backgroundColor?: number[]

    /**
     * @param textColor - Color of text
     * @param textScale - Text Size (0.0..1.0)
     * @param lineWidth - Line width
     * @param lineColor - Line color
     * @param bulletScale - Bullet size respective of text
     * @param bulletColor - Bullet color
     * @param backgroundColor - Background color of label
     */
    constructor(
        textColor = [1.0, 1.0, 1.0, 1.0],
        textScale = 1.0,
        textAlignment = LabelTextAlignment.LEFT,
        lineWidth = 0.0,
        lineColor = [0.0, 0.0, 0.0],
        lineTerminator = LabelLineTerminator.NONE,
        bulletScale?: number,
        bulletColor?: number[],
        backgroundColor?: number[]
    ) {
        this.textColor = textColor
        this.textScale = textScale
        this.textAlignment = textAlignment
        this.lineWidth = lineWidth
        this.lineColor = lineColor
        this.lineTerminator = lineTerminator
        this.bulletScale = bulletScale
        this.bulletColor = bulletColor
        this.backgroundColor = backgroundColor
    }
}

/**
 * Label class
 * @ignore
 */
export class NVLabel3D {
    text: string
    style: NVLabel3DStyle
    points?: number[] | number[][]
    anchor: LabelAnchorPoint
    onClick?: (label: NVLabel3D, e?: MouseEvent) => void

    /**
     * @param text - The text of the label
     * @param style - The style of the label
     * @param points - An array of points label for label lines
     */
    constructor(text: string, style: NVLabel3DStyle, points?: number[] | number[][], anchor?: LabelAnchorPoint, onClick?: (label: NVLabel3D, e?: MouseEvent) => void) {
        this.text = text
        this.style = style
        this.points = points
        this.anchor = anchor || LabelAnchorPoint.NONE
        this.onClick = onClick
    }
}