/**
 * Unit tests for browser-process parsing and candidate ranking — no browser.
 *
 * Ranking exists because a machine can run several Chromium browsers at once.
 * Picking the wrong one means launching a profile window into a browser the
 * harness is not connected to: the agent sees nothing, and a browser the user
 * never pointed us at gets a new window. (That is exactly what happened during
 * development before ranking existed.)
 *
 * Run: npx tsx test/profile/browser-process-test.ts
 */
import { homedir } from "node:os";
import { join } from "node:path";
import { parseUserDataDirFlag, rankBrowserCandidate } from "../../src/profile/browser-process";

let passed = 0;
let failed = 0;
const check = (cond: boolean, label: string): void => {
  if (cond) {
    passed++;
    console.log(`  ✓ ${label}`);
  } else {
    failed++;
    console.error(`  ✗ ${label}`);
  }
};

function main(): void {
  // B1: --user-data-dir parsing
  {
    check(
      parseUserDataDirFlag("/opt/google/chrome/chrome --user-data-dir=/tmp/x --foo") === "/tmp/x",
      "B1: bare value parsed",
    );
    check(
      parseUserDataDirFlag('chrome.exe --user-data-dir="C:\\Users\\Some Name\\Data" --bar') ===
        "C:\\Users\\Some Name\\Data",
      "B1: double-quoted value with spaces parsed",
    );
    check(
      parseUserDataDirFlag("chrome --user-data-dir='/home/u/my dir'") === "/home/u/my dir",
      "B1: single-quoted value parsed",
    );
    check(parseUserDataDirFlag("/opt/google/chrome/chrome") === undefined, "B1: absent flag → undefined");
    check(parseUserDataDirFlag("chrome --user-data-dir=") === undefined, "B1: empty value → undefined");
  }

  // B2: an explicit --user-data-dir is decisive in both directions
  {
    const target = "/tmp/pi-e2e-abc";
    const match = rankBrowserCandidate({ exePath: "/opt/google/chrome/chrome", explicitUserDataDir: target }, target);
    const other = rankBrowserCandidate(
      { exePath: "/opt/google/chrome/chrome", explicitUserDataDir: "/tmp/somewhere-else" },
      target,
    );
    const noFlag = rankBrowserCandidate({ exePath: "/opt/google/chrome/chrome" }, target);
    check(match > noFlag, "B2: exact user-data-dir match outranks a flagless process");
    check(other < noFlag, "B2: a DIFFERENT explicit user-data-dir ranks below a flagless process");
    check(other === 0, "B2: a different explicit dir is disqualified outright");
  }

  // B3: browser family match decides between flagless processes
  {
    const braveDir = join(homedir(), ".config/BraveSoftware/Brave-Browser");
    const brave = rankBrowserCandidate({ exePath: "/usr/bin/brave-browser" }, braveDir);
    const chrome = rankBrowserCandidate({ exePath: "/opt/google/chrome/chrome" }, braveDir);
    check(brave > chrome, "B3: Brave wins for a Brave user-data-dir");

    const chromeDir = join(homedir(), ".config/google-chrome");
    check(
      rankBrowserCandidate({ exePath: "/opt/google/chrome/chrome" }, chromeDir) >
        rankBrowserCandidate({ exePath: "/usr/bin/brave-browser" }, chromeDir),
      "B3: Chrome wins for a Chrome user-data-dir",
    );

    const chromiumDir = join(homedir(), ".config/chromium");
    check(
      rankBrowserCandidate({ exePath: "/usr/bin/chromium" }, chromiumDir) >
        rankBrowserCandidate({ exePath: "/opt/google/chrome/chrome" }, chromiumDir),
      "B3: Chromium is not mistaken for Chrome",
    );
  }

  // B4: no preference expressed → every candidate is equally acceptable
  {
    check(
      rankBrowserCandidate({ exePath: "/usr/bin/brave-browser" }) ===
        rankBrowserCandidate({ exePath: "/opt/google/chrome/chrome" }),
      "B4: without a target dir, candidates rank equally",
    );
  }

  // B5: Windows path comparison ignores case and separator style
  if (process.platform === "win32") {
    check(
      rankBrowserCandidate(
        { exePath: "C:\\Program Files\\Google\\Chrome\\Application\\chrome.exe", explicitUserDataDir: "C:\\Users\\U\\Data" },
        "c:/users/u/data",
      ) === 4,
      "B5 win: case and separator differences still match",
    );
  }

  console.log(`\n${passed} passed, ${failed} failed`);
  process.exit(failed === 0 ? 0 : 1);
}

main();