import { EOL } from "node:os";
import { createInterface } from "node:readline";
import z from "zod/v4";

import { NamedError } from "@/lib/error";

export namespace UI {
  export const CancelledError = NamedError.create("UICancelledError", z.void());

  export const Style = {
    TEXT_HIGHLIGHT: "\x1b[96m",
    TEXT_HIGHLIGHT_BOLD: "\x1b[96m\x1b[1m",
    TEXT_DIM: "\x1b[90m",
    TEXT_DIM_BOLD: "\x1b[90m\x1b[1m",
    TEXT_NORMAL: "\x1b[0m",
    TEXT_NORMAL_BOLD: "\x1b[1m",
    TEXT_WARNING: "\x1b[93m",
    TEXT_WARNING_BOLD: "\x1b[93m\x1b[1m",
    TEXT_DANGER: "\x1b[91m",
    TEXT_DANGER_BOLD: "\x1b[91m\x1b[1m",
    TEXT_SUCCESS: "\x1b[92m",
    TEXT_SUCCESS_BOLD: "\x1b[92m\x1b[1m",
    TEXT_INFO: "\x1b[94m",
    TEXT_INFO_BOLD: "\x1b[94m\x1b[1m",
  };

  export function println(...message: string[]) {
    print(...message);
    process.stderr.write(EOL);
  }

  export function print(...message: string[]) {
    blank = false;
    process.stderr.write(message.join(" "));
  }

  let blank = false;
  export function empty() {
    if (blank) return;
    println("" + Style.TEXT_NORMAL);
    blank = true;
  }

  export async function input(prompt: string): Promise<string> {
    const rl = createInterface({ input: process.stdin, output: process.stdout });
    return new Promise((resolve) => {
      rl.question(prompt, (answer: string) => {
        rl.close();
        resolve(answer.trim());
      });
    });
  }

  export function error(message: string) {
    println(Style.TEXT_DANGER_BOLD + "Error: " + Style.TEXT_NORMAL + message);
  }

  export function markdown(text: string): string {
    return text;
  }
}