import type { ControlModel } from '$shared/lib';
import type { ControlId } from '../types/typography';

/**
 * Font size constants
 */
export const DEFAULT_FONT_SIZE = 48;
export const MIN_FONT_SIZE = 8;
export const MAX_FONT_SIZE = 100;
export const FONT_SIZE_STEP = 1;

/**
 * Font weight constants
 */
export const DEFAULT_FONT_WEIGHT = 400;
export const MIN_FONT_WEIGHT = 100;
export const MAX_FONT_WEIGHT = 900;
export const FONT_WEIGHT_STEP = 100;

/**
 * Line height constants
 */
export const DEFAULT_LINE_HEIGHT = 1.5;
export const MIN_LINE_HEIGHT = 1;
export const MAX_LINE_HEIGHT = 2;
export const LINE_HEIGHT_STEP = 0.05;

/**
 * Letter spacing constants
 */
export const DEFAULT_LETTER_SPACING = 0;
export const MIN_LETTER_SPACING = -0.1;
export const MAX_LETTER_SPACING = 0.5;
export const LETTER_SPACING_STEP = 0.01;

export const DEFAULT_TYPOGRAPHY_CONTROLS_DATA: ControlModel<ControlId>[] = [
    {
        id: 'font_size',
        value: DEFAULT_FONT_SIZE,
        max: MAX_FONT_SIZE,
        min: MIN_FONT_SIZE,
        step: FONT_SIZE_STEP,

        increaseLabel: 'Increase Font Size',
        decreaseLabel: 'Decrease Font Size',
        controlLabel: 'Size',
    },
    {
        id: 'font_weight',
        value: DEFAULT_FONT_WEIGHT,
        max: MAX_FONT_WEIGHT,
        min: MIN_FONT_WEIGHT,
        step: FONT_WEIGHT_STEP,

        increaseLabel: 'Increase Font Weight',
        decreaseLabel: 'Decrease Font Weight',
        controlLabel: 'Weight',
    },
    {
        id: 'line_height',
        value: DEFAULT_LINE_HEIGHT,
        max: MAX_LINE_HEIGHT,
        min: MIN_LINE_HEIGHT,
        step: LINE_HEIGHT_STEP,

        increaseLabel: 'Increase Line Height',
        decreaseLabel: 'Decrease Line Height',
        controlLabel: 'Leading',
    },
    {
        id: 'letter_spacing',
        value: DEFAULT_LETTER_SPACING,
        max: MAX_LETTER_SPACING,
        min: MIN_LETTER_SPACING,
        step: LETTER_SPACING_STEP,

        increaseLabel: 'Increase Letter Spacing',
        decreaseLabel: 'Decrease Letter Spacing',
        controlLabel: 'Tracking',
    },
];

/**
 * Font size multipliers
 */
export const MULTIPLIER_S = 0.5;
export const MULTIPLIER_M = 0.75;
export const MULTIPLIER_L = 1;

/**
 * Index value for items not yet loaded in a virtualized list.
 * Treated as being at the very bottom of the infinite scroll.
 */
export const VIRTUAL_INDEX_NOT_LOADED = Infinity;