import { describe, expect, it } from "vitest";
import { sanitizeRconOutput, validateRconCommand, validateRconConnection } from "./rcon-validation";

describe("RCON validation", () => {
  it("normalizes any valid DNS hostname and port without deployment configuration", () => {
    expect(validateRconConnection({
      name: " Season 4 ",
      host: "SEASON4.SOMC.SVC.CLUSTER.LOCAL",
      port: "25575",
      password: "correct horse battery staple",
    }, { passwordRequired: true })).toEqual({
      name: "Season 4",
      host: "season4.somc.svc.cluster.local",
      port: 25575,
      password: "correct horse battery staple",
    });

    expect(validateRconConnection({
      name: "Creative",
      host: "creative.example.net",
      port: "43210",
      password: "secret",
    }, { passwordRequired: true })).toEqual({
      name: "Creative",
      host: "creative.example.net",
      port: 43210,
      password: "secret",
    });
  });

  it("rejects IP literals and malformed DNS hostnames", () => {
    for (const host of ["10.0.0.1", "2001:db8::1", "season4.", "-season4.example", "season4..example"]) {
      expect(validateRconConnection({ name: "Server", host, port: "25575", password: "secret" }, {
        passwordRequired: true,
      })).toBeNull();
    }
  });

  it("allows a blank replacement password only while editing", () => {
    expect(validateRconConnection({ name: "Server", host: "season4.somc.svc.cluster.local", port: "25575", password: "" }, {
      passwordRequired: false,
    })?.password).toBeNull();
    expect(validateRconConnection({ name: "Server", host: "season4.somc.svc.cluster.local", port: "25575", password: "" }, {
      passwordRequired: true,
    })).toBeNull();
  });

  it("bounds commands by UTF-8 bytes and rejects control characters", () => {
    expect(validateRconCommand(" list ")).toBe("list");
    expect(validateRconCommand("say first\nsay second")).toBeNull();
    expect(validateRconCommand("say \u001b[31mred")).toBeNull();
    expect(validateRconCommand(`say ${"😀".repeat(300)}`)).toBeNull();
  });

  it("strips output controls and bounds output by UTF-8 bytes", () => {
    expect(sanitizeRconOutput("ok\u001b[31mred\u0000done")).toBe("ok[31mreddone");
    expect(Buffer.byteLength(sanitizeRconOutput("😀".repeat(20_000)), "utf8")).toBeLessThanOrEqual(65_536);
  });
});