import * as shiki from 'shiki';

import { Config } from './getConfig';

import { FormattedString, T } from './formattedString';

import { ChalkInstance } from 'chalk';

/**

* Internal context object used to pass around config and config-derived

* constants.

*/

export type Context = Config & {

CHALK: ChalkInstance;

SCREEN_WIDTH: number;

HORIZONTAL_SEPARATOR: FormattedString;

HIGHLIGHTER?: shiki.Highlighter;

};

export async function getContextForConfig(

config: Config,

chalk: ChalkInstance,

screenWidth: number

): Promise<Context> {

const SCREEN_WIDTH = screenWidth;

const HORIZONTAL_SEPARATOR = T()

.fillWidth(SCREEN_WIDTH, '─')

.addSpan(0, SCREEN_WIDTH, config.BORDER_COLOR);

let HIGHLIGHTER = undefined;

if (config.SYNTAX_HIGHLIGHTING_THEME) {

HIGHLIGHTER = await shiki.createHighlighter({

themes: [config.SYNTAX_HIGHLIGHTING_THEME],

langs: [],

});

}

return {

...config,

CHALK: chalk,

SCREEN_WIDTH,

HORIZONTAL_SEPARATOR,

HIGHLIGHTER,

};

}