// The process wrapper against the real oxy binary on a scratch repository.

// Runs with `npm test`; needs oxy on PATH, at ~/.local/bin/oxy, or in OXY_BIN.

import { test } from "node:test";

import assert from "node:assert/strict";

import { mkdtempSync, writeFileSync, mkdirSync } from "node:fs";

import { tmpdir } from "node:os";

import { join } from "node:path";

import { Oxy, findBinary } from "../out/oxy.mjs";

const binary = process.env.OXY_BIN ?? findBinary(undefined);

const oxy = new Oxy(binary);

test("root, status, cat, log and commit round trip", async () => {

  const dir = mkdtempSync(join(tmpdir(), "oxy-vscode-"));

  const home = join(dir, "home");

  mkdirSync(home);

  process.env.OXY_HOME = home;

  await oxy.check(dir, ["init", "repo"]);

  const root = join(dir, "repo");

  await oxy.check(root, ["identity", "create", "--name", "Test", "--email", "[email protected]"]);

  const version = await oxy.version();

  assert.equal(version.protocol, 1);

  assert.equal(await oxy.root(dir), null, "outside a repository");

  const info = await oxy.root(root);

  assert.equal(info?.bookmark, "main");

  assert.ok(info?.root.endsWith("repo"));

  writeFileSync(join(root, "a.txt"), "one\n");

  let status = await oxy.status(root);

  assert.deepEqual(status.paths, [{ path: "a.txt", status: "Added" }]);

  assert.equal(status.clean, false);

  await oxy.commit(root, "first");

  status = await oxy.status(root);

  assert.equal(status.clean, true);

  writeFileSync(join(root, "a.txt"), "one\ntwo\n");

  assert.equal((await oxy.cat(root, "a.txt")).toString(), "one\n", "the base version");

  const log = await oxy.log(root, 10);

  assert.equal(log.changes.filter((c) => !c.working_copy).length, 1);

  assert.equal(log.changes.find((c) => !c.working_copy)?.signature?.status, "unsigned");

  assert.ok((await oxy.prompt(root)).includes("main"));

  const bookmarks = await oxy.bookmarks(root);

  assert.deepEqual(bookmarks.map((b) => [b.name, b.current]), [["main", true]]);

  await assert.rejects(oxy.cat(root, "missing.txt"), /not in that state/);

  // Amend folds the edit into the single head.

  await oxy.amend(root, "first, amended");

  assert.equal((await oxy.status(root)).clean, true);

  assert.ok((await oxy.log(root, 10)).changes.some((c) => c.message === "first, amended"));

  // Hunks: commit only b.txt's, leave a.txt's edit, then discard it.

  writeFileSync(join(root, "a.txt"), "one\ntwo\nthree\n");

  writeFileSync(join(root, "b.txt"), "b\n");

  const hunks = await oxy.hunks(root);

  assert.ok(hunks.length >= 2, JSON.stringify(hunks));

  const bHunk = hunks.find((h) => h.path === "b.txt");

  await oxy.commitHunks(root, "b only", [bHunk.index]);

  status = await oxy.status(root);

  assert.deepEqual(status.paths.map((p) => p.path), ["a.txt"], "a.txt stays uncommitted");

  assert.equal((await oxy.cat(root, "b.txt")).toString(), "b\n", "committed with its content");

  await oxy.discard(root, ["a.txt"]);

  assert.equal((await oxy.status(root)).clean, true);

  // The operation log, and undo of the last operation (the commit).

  const ops = await oxy.opLog(root);

  assert.ok(ops[0].current && ops.length > 3);

  assert.match(await oxy.undo(root), /Undone/);

  status = await oxy.status(root);

  assert.ok(status.paths.some((p) => p.path === "b.txt"), "the commit is undone; b.txt is uncommitted work again");

});