// What the flow editor offers for a value: dropdown, suggestions or plain
// text, from the server's schema. Run by `npm test`.
import assert from "node:assert/strict";
import { test } from "node:test";
import {
  eventSpec,
  kindSpec,
  markersIn,
  offerFor,
} from "../src/pages/notifications/FlowChoices.ts";

const d = (name, description = "") => ({ name, description });

const schema = {
  source_events: [d("issues")],
  fields: [
    {
      ...d("kind"),
      values: [d("issue"), d("PR", "A pull request")],
      closed: true,
    },
    { ...d("action"), values: [d("opened"), d("closed")], closed: false },
    { ...d("repo"), values: [], values_from: "repos", closed: false },
    { ...d("title"), values: [] },
  ],
  node_kinds: [
    {
      kind: "todo",
      description: "",
      fields: [
        {
          ...d("to"),
          required: true,
          values: [],
          values_from: "agents",
          closed: true,
        },
        {
          ...d("op"),
          required: true,
          values: [d("upsert"), d("clear")],
          closed: true,
        },
      ],
    },
    {
      kind: "request_reviewer",
      description: "",
      fields: [
        {
          ...d("reviewer"),
          required: true,
          values: [],
          values_from: "agents",
          closed: false,
        },
        {
          ...d("later"),
          required: false,
          values: [],
          values_from: "somewhere-new",
        },
      ],
    },
  ],
  limits: { max_nodes: 1, max_depth: 1, max_flows: 1 },
};

test("a field with a complete list is a dropdown, its labels carrying the description", () => {
  const offer = offerFor(eventSpec(schema, "kind"), {}, "PR");
  assert.equal(offer.closed, true);
  assert.deepEqual(
    offer.options.map((o) => o.value),
    ["issue", "PR"],
  );
  assert.equal(offer.options[1].label, "PR — A pull request");
});

test("a list that is only examples stays a text box with suggestions", () => {
  const offer = offerFor(eventSpec(schema, "action"), {}, "");
  assert.equal(offer.closed, false);
  assert.deepEqual(
    offer.options.map((o) => o.value),
    ["opened", "closed"],
  );
});

test("a field with no known values is plain text", () => {
  assert.equal(offerFor(eventSpec(schema, "title"), {}, ""), null);
  assert.equal(offerFor(undefined, {}, ""), null, "no schema entry at all");
});

test("a list fetched from the swarm fills the options, and a closed one becomes a dropdown", () => {
  const spec = kindSpec(schema, "todo", "to");
  const offer = offerFor(spec, { agents: ["atlas", "iris"] }, "iris");
  assert.equal(offer.closed, true);
  assert.deepEqual(
    offer.options.map((o) => o.value),
    ["atlas", "iris"],
  );
});

test("until its list arrives, or when it cannot be fetched, there is nothing to offer", () => {
  const spec = kindSpec(schema, "todo", "to");
  assert.equal(offerFor(spec, {}, ""), null);
  // Open lists with names fetched are suggestions: any login still goes.
  const reviewer = kindSpec(schema, "request_reviewer", "reviewer");
  const offer = offerFor(reviewer, { agents: ["argus"] }, "review-classifier");
  assert.equal(offer.closed, false);
  assert.deepEqual(
    offer.options.map((o) => o.value),
    ["argus"],
  );
});

test("a dropdown whose source has not arrived falls back to suggestions", () => {
  const spec = {
    values: [d("a")],
    values_from: "agents",
    closed: true,
  };
  assert.equal(offerFor(spec, {}, "").closed, false);
  assert.equal(offerFor(spec, { agents: ["b"] }, "").closed, true);
});

test("a value the list lacks stays selectable, marked as not listed", () => {
  const spec = kindSpec(schema, "todo", "to");
  const offer = offerFor(spec, { agents: ["atlas"] }, "gone");
  assert.equal(offer.options[0].value, "gone");
  assert.equal(offer.options[0].label, "gone (not listed)");
  assert.equal(offer.options.length, 2);
  // Nothing set yet adds nothing.
  assert.equal(offerFor(spec, { agents: ["atlas"] }, "").options.length, 1);
});

test("a name in both the fixed values and the fetched list is offered once", () => {
  const spec = { values: [d("x")], values_from: "agents" };
  const offer = offerFor(spec, { agents: ["x", "y"] }, "");
  assert.deepEqual(
    offer.options.map((o) => o.value),
    ["x", "y"],
  );
});

test("the markers to fetch are the ones the schema names and the editor knows, once each", () => {
  assert.deepEqual(markersIn(schema), ["agents", "repos"]);
  assert.deepEqual(markersIn({ ...schema, fields: [], node_kinds: [] }), []);
});