import { describe, it, expect } from "vitest";
import { stripAnsi } from "./ansi";

describe("stripAnsi", () => {
  it("returns input unchanged when there are no escape sequences", () => {
    expect(stripAnsi("hello world")).toBe("hello world");
  });

  it("strips SGR colour codes", () => {
    const input = "\x1b[36mInstalling backend dependencies...\x1b[0m";
    expect(stripAnsi(input)).toBe("Installing backend dependencies...");
  });

  it("strips bold + colour wrapped output across multiple lines", () => {
    const input =
      "\x1b[36mInstalling deps...\x1b[0m\nDownloading...\n\x1b[32m\x1b[1m✓ All dependencies installed!\x1b[0m";
    expect(stripAnsi(input)).toBe(
      "Installing deps...\nDownloading...\n✓ All dependencies installed!",
    );
  });

  it("handles empty string", () => {
    expect(stripAnsi("")).toBe("");
  });

  it("strips OSC hyperlinks terminated by ST", () => {
    const input = "click \x1b]8;;https://example.com\x1b\\here\x1b]8;;\x1b\\!";
    expect(stripAnsi(input)).toBe("click here!");
  });

  it("strips OSC window-title sequences terminated by BEL", () => {
    const input = "\x1b]0;my-shell\x07ready";
    expect(stripAnsi(input)).toBe("ready");
  });

  it("strips CSI private-prefix sequences (hide cursor, bracketed paste)", () => {
    expect(stripAnsi("before\x1b[?25lafter")).toBe("beforeafter");
    expect(stripAnsi("\x1b[?2004hpaste\x1b[?2004l")).toBe("paste");
  });
});