// Unit tests for the desktop plugin-tree maintenance (plain node, no Electron).
// Run: node --test cmd/gui/plugin-sync.test.js
const test = require("node:test");
const assert = require("node:assert");
const fs = require("fs");
const os = require("os");
const path = require("path");
const { BUILTIN_PLUGINS, ensurePluginDirConfigured, syncBundledPluginsOnUpgrade } = require("./plugin-sync");

const tmp = () => fs.mkdtempSync(path.join(os.tmpdir(), "plugin-sync-"));

test("back-fills plugin_dir into an existing profile without it", () => {
  const dir = tmp();
  const cfg = path.join(dir, "config.yaml");
  fs.writeFileSync(cfg, 'listen: 127.0.0.1:8787\ndefault_model: AUTO\nkeys:\n  - key: k\n    role: admin\n');
  const plugins = path.join(dir, "plugins");
  assert.equal(ensurePluginDirConfigured(cfg, plugins, null), "added");
  const out = fs.readFileSync(cfg, "utf-8");
  assert.match(out, /^plugin_dir: "/m);
  assert.ok(out.includes(plugins.replace(/\\/g, "\\\\")) || out.includes(plugins), "path written");
  // the rest of the profile must survive untouched
  assert.match(out, /^listen: 127\.0\.0\.1:8787$/m);
  assert.match(out, /^  - key: k$/m);
});

test("leaves a profile that already sets plugin_dir alone", () => {
  const dir = tmp();
  const cfg = path.join(dir, "config.yaml");
  const orig = 'plugin_dir: "/custom/plugins"\nlisten: ":1"\n';
  fs.writeFileSync(cfg, orig);
  assert.equal(ensurePluginDirConfigured(cfg, "/whatever", null), "present");
  assert.equal(fs.readFileSync(cfg, "utf-8"), orig);
});

test("missing config is not created by the back-fill", () => {
  const dir = tmp();
  const cfg = path.join(dir, "config.yaml");
  assert.equal(ensurePluginDirConfigured(cfg, path.join(dir, "p"), null), "absent");
  assert.equal(fs.existsSync(cfg), false);
});

test("upgrade drops builtin plugins (keeping a backup) but not user plugins", () => {
  const dir = tmp();
  const plugins = path.join(dir, "plugins");
  fs.mkdirSync(plugins, { recursive: true });
  for (const f of BUILTIN_PLUGINS) fs.writeFileSync(path.join(plugins, f), "OLD");
  fs.writeFileSync(path.join(plugins, "my-own.lua"), "MINE");
  fs.writeFileSync(path.join(dir, ".plugin-seed-version"), "1.0.0\n");

  const r = syncBundledPluginsOnUpgrade(dir, plugins, "2.0.42", null);
  assert.equal(r.changed, true);
  assert.deepEqual(r.dropped.sort(), [...BUILTIN_PLUGINS].sort());
  for (const f of BUILTIN_PLUGINS) {
    assert.equal(fs.existsSync(path.join(plugins, f)), false, f + " dropped");
    assert.equal(fs.readFileSync(path.join(plugins, f + ".prev-1.0.0"), "utf-8"), "OLD");
  }
  assert.equal(fs.readFileSync(path.join(plugins, "my-own.lua"), "utf-8"), "MINE");
  assert.equal(fs.readFileSync(path.join(dir, ".plugin-seed-version"), "utf-8").trim(), "2.0.42");
});

test("same version is a no-op (nothing dropped)", () => {
  const dir = tmp();
  const plugins = path.join(dir, "plugins");
  fs.mkdirSync(plugins, { recursive: true });
  fs.writeFileSync(path.join(plugins, "channels.lua"), "CURRENT");
  fs.writeFileSync(path.join(dir, ".plugin-seed-version"), "2.0.42\n");
  const r = syncBundledPluginsOnUpgrade(dir, plugins, "2.0.42", null);
  assert.equal(r.changed, false);
  assert.equal(fs.readFileSync(path.join(plugins, "channels.lua"), "utf-8"), "CURRENT");
});

test("first run on a fresh profile just stamps the version", () => {
  const dir = tmp();
  const plugins = path.join(dir, "plugins");
  fs.mkdirSync(plugins, { recursive: true });
  const r = syncBundledPluginsOnUpgrade(dir, plugins, "2.0.42", null);
  assert.equal(r.changed, true);
  assert.deepEqual(r.dropped, []);
  assert.equal(fs.existsSync(path.join(dir, ".plugin-seed-version")), true);
});