import test from "node:test";
import assert from "node:assert/strict";
import { getSyncStatus } from "../src/sync_status.js";
import { syncStateToBackendHelper } from "../src/runtime_services.js";

test("save status distinguishes dirty, saving, failed, connected and saved", () => {
  assert.equal(getSyncStatus({}, false).kind, "connecting");
  assert.equal(getSyncStatus({ available: true }, false).kind, "connected");
  assert.equal(getSyncStatus({ available: true, lastSavedAt: "now" }, true).kind, "pending");
  assert.equal(getSyncStatus({ pendingWrites: 1 }, true).kind, "saving");
  assert.equal(getSyncStatus({ available: true, writeError: "failed" }, true).kind, "error");
  assert.equal(getSyncStatus({ available: true, lastSavedAt: "now" }, false).kind, "saved");
});

test("offline and stale contact are not displayed as a successful live connection", () => {
  assert.equal(getSyncStatus({ connectionChecked: true }, false).kind, "offline");
  assert.equal(getSyncStatus({ available: true, lastContactAt: 1000 }, false, 17000).kind, "stale");
  assert.equal(getSyncStatus({ available: true, lastContactAt: 1000 }, false, 2000).kind, "connected");
});

test("failed writes retain dirty state and a successful retry clears the error", async () => {
  const previousFetch = globalThis.fetch;
  const backend = {};
  let dirty = true;
  const deps = { backend, t: key => key, getBackendUrl: () => "http://test", buildPersistableState: () => ({}), getLocalStateVersion: () => 1, getSyncedStateVersion: () => 0, setSyncedStateVersion: () => {}, setLocalStateDirty: value => { dirty = value; } };
  try {
    globalThis.fetch = async () => { throw new Error("offline"); };
    await syncStateToBackendHelper(deps);
    assert.equal(dirty, true);
    assert.equal(backend.pendingWrites, 0);
    assert.ok(backend.writeError);
    globalThis.fetch = async () => ({ ok: true });
    await syncStateToBackendHelper(deps);
    assert.equal(dirty, false);
    assert.equal(backend.writeError, "");
    assert.ok(backend.lastSavedAt);
    assert.equal(backend.pendingWrites, 0);
  } finally { globalThis.fetch = previousFetch; }
});