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import {  font_list,  generate,  Options,  theme_list,} from "./bindings/bindings.ts";import { base64, io } from "./deps.ts";
const isError = (x: unknown): x is { Error: { error: string } } => {  return typeof x == "object" && x !== null && "Error" in x;};
const isFontList = (x: unknown): x is { FontList: { data: Array<string> } } => {  return typeof x == "object" && x !== null && "FontList" in x;};
const isThemeList = (  x: unknown,): x is { ThemeList: { data: Array<string> } } => {  return typeof x == "object" && x !== null && "ThemeList" in x;};
const isImage = (x: unknown): x is { Image: { data: string } } => {  return typeof x == "object" && x !== null && "Image" in x;};
export function fontList(): string[] {  const result = font_list();  if (isError(result)) {    throw new Error(`cannot get font list: ${result.Error.error}`);  }  if (isFontList(result)) {    return result.FontList.data;  }  throw new Error(`unexpected result: ${JSON.stringify(result)}`);}
export function themeList(): string[] {  const result = theme_list();  if (isThemeList(result)) {    return result.ThemeList.data;  }  throw new Error(`unexpected result: ${JSON.stringify(result)}`);}
const defaultOptions = {  code: "",  language: "",  font: "",  highlight_lines: "",  no_line_number: false,  no_round_corner: false,  no_window_controls: false,  background_color: "#aaaaff",  line_offset: 1,  line_pad: 2,  pad_horiz: 80,  pad_vert: 100,  shadow_blur_radius: 0,  shadow_color: "#555555",  shadow_offset_x: 0,  shadow_offset_y: 0,  tab_width: 4,  theme: "Solarized (dark)",};
export type Option = Partial<Omit<Options, "code" | "language">>;
/* * Generates image from source code. * You can specify several options, such as theme. * The options conform to silicon options, see silicon help for details. * */export async function generateImage(  code: string,  language: string,  opts?: Option,): Promise<Deno.Reader> {  defaultOptions.code = code;  defaultOptions.language = language;  const options = { ...defaultOptions, ...opts };  const result = generate(options);  if (isError(result)) {    throw new Error(`cannot generate image: ${result.Error.error}`);  }  if (isImage(result)) {    const data = base64.decode(result.Image.data);    const buffer = new io.Buffer();    await buffer.write(data);    return buffer;  }  throw new Error(`unexpected result: ${JSON.stringify(result)}`);}