/**
 * @file native-dialog.test.js
 * @description Unit tests for the server-side native folder/file picker: the
 * argv each platform gets, the fallback from zenity to kdialog, Cancel versus a
 * chosen path, and the "no dialog program" answer the client falls back on.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */
const { describe, it, afterEach } = require("node:test");
const assert = require("node:assert/strict");
const os = require("node:os");
const nd = require("../lib/native-dialog");
const desktop = require("../lib/desktop-env");

const linux = process.platform === "linux";

describe("native-dialog", () => {
  afterEach(() => nd.__setExecImpl(null));

  it("starts in the given folder, a file's folder, or home", () => {
    assert.equal(nd.startDir(os.tmpdir()), os.tmpdir());
    assert.equal(nd.startDir("/definitely/not/here/x"), os.homedir());
    assert.equal(nd.startDir("~"), os.homedir());
    assert.equal(nd.startDir(undefined), os.homedir());
  });

  it("builds zenity then kdialog on Linux, the request's folder one argv element", () => {
    const [[z, zargs], [k, kargs]] = nd.dialogCommands("dir", "/tmp/a b", "linux");
    assert.equal(z, "zenity");
    assert.deepEqual(zargs, [
      "--file-selection",
      "--title=Select a folder",
      "--filename=/tmp/a b/",
      "--directory",
    ]);
    assert.equal(k, "kdialog");
    assert.deepEqual(kargs.slice(0, 2), ["--getexistingdirectory", "/tmp/a b"]);
    assert.ok(!nd.dialogCommands("file", "/tmp", "linux")[0][1].includes("--directory"));
  });

  it("passes the folder to osascript as an argument, never inside the script", () => {
    const [[cmd, args]] = nd.dialogCommands("file", '/x"; do shell script "id', "darwin");
    assert.equal(cmd, "osascript");
    assert.equal(args.at(-1), '/x"; do shell script "id');
    assert.ok(!args.slice(0, -2).join(" ").includes("shell script"));
  });

  it("brings osascript forward before the macOS dialog, so it does not open behind the browser", () => {
    const [[, args]] = nd.dialogCommands("dir", "/x", "darwin");
    const script = args.filter((_, i) => args[i - 1] === "-e");
    assert.ok(script.indexOf("activate") > -1);
    assert.ok(script.indexOf("activate") < script.findIndex((s) => s.includes("choose folder")));
  });

  it("gives the Windows dialog a foreground TopMost owner, so it does not open behind the browser", () => {
    for (const kind of ["dir", "file"]) {
      const [[cmd, args]] = nd.dialogCommands(kind, "C:\\x", "win32");
      assert.equal(cmd, "powershell.exe");
      assert.equal(args.at(-2), "-EncodedCommand");
      const script = Buffer.from(args.at(-1), "base64").toString("utf16le");
      assert.match(
        script,
        /\$o\.TopMost = \$true;[\s\S]*ShowWindow\(\$o\.Handle, 1\)[\s\S]*\$o\.Show\(\)[\s\S]*Front\(\$o\.Handle\)[\s\S]*\$d\.ShowDialog\(\$o\)/
      );
      assert.match(script, /AttachThreadInput/);
      assert.ok(!script.includes("C:\\x"), "the folder travels in env, never the script");
    }
  });

  it(
    "answers the chosen path, null on Cancel, and falls through a missing program",
    {
      skip: !linux,
    },
    async () => {
      desktop.__setExecImpl(() => "DISPLAY=:0\n");
      const tried = [];
      nd.__setExecImpl(async (cmd) => {
        tried.push(cmd);
        return cmd === "zenity" ? { missing: true } : { code: 0, stdout: "/home/u/proj\n" };
      });
      assert.equal(await nd.pickPath("dir"), "/home/u/proj");
      assert.deepEqual(tried, ["zenity", "kdialog"]);

      nd.__setExecImpl(async () => ({ code: 1, stdout: "" }));
      assert.equal(await nd.pickPath("file"), null);

      nd.__setExecImpl(async () => ({ missing: true }));
      await assert.rejects(nd.pickPath("dir"), { code: "ENODIALOG" });
    }
  );

  it(
    "answers ENODIALOG, not a Cancel, when the program could not reach the desktop",
    { skip: !linux },
    async () => {
      desktop.__setExecImpl(() => "DISPLAY=:0\n");
      nd.__setExecImpl(async () => ({
        code: 1,
        stdout: "",
        stderr: "(zenity:1): Gtk-WARNING **: cannot open display: :0\n",
      }));
      await assert.rejects(nd.pickPath("dir"), { code: "ENODIALOG" });
    }
  );

  it("passes the abort signal through to the dialog program", { skip: !linux }, async () => {
    desktop.__setExecImpl(() => "DISPLAY=:0\n");
    const ac = new AbortController();
    let seen;
    nd.__setExecImpl(async (cmd, args, env, signal) => {
      seen = signal;
      return { code: 1, stdout: "", stderr: "" };
    });
    assert.equal(await nd.pickPath("dir", undefined, ac.signal), null);
    assert.equal(seen, ac.signal);
  });

  it("tells a Cancel from a failure per program", () => {
    assert.equal(nd.isCancel("zenity", ""), true);
    assert.equal(
      nd.isCancel("zenity", "Gtk-Message: GtkDialog mapped without a transient parent"),
      true
    );
    assert.equal(nd.isCancel("kdialog", "qt.qpa.xcb: could not connect to display :1"), false);
    assert.equal(nd.isCancel("osascript", "execution error: User canceled. (-128)"), true);
    assert.equal(
      nd.isCancel("osascript", "execution error: No user interaction allowed. (-1713)"),
      false
    );
    assert.equal(nd.isCancel("powershell.exe", ""), true);
    assert.equal(nd.isCancel("powershell.exe", "Add-Type : Cannot add type"), false);
  });
});