/**
 * test/analyze.test.ts
 *
 * Testes unitários para a identificação da estrutura de uma resposta JSON.
 */

import { describe, it } from "node:test";
import assert from "node:assert/strict";

import { analyzeStructure } from "../src/diagnostics/analyze.js";

describe("analyzeStructure", () => {
  it("descreve a raiz quando é um objeto", () => {
    const summary = analyzeStructure({
      data: [],
      message: "ok",
    });

    assert.equal(summary.rootType, "object");
    assert.deepEqual(summary.rootKeys.sort(), ["data", "message"]);
    assert.equal(summary.arrayItemCount, undefined);
  });

  it("descreve um array: quantidade de itens, chaves e tipos do primeiro item", () => {
    const summary = analyzeStructure([
      {
        id: "app-1",
        status: "confirmed",
        patient: { name: "Maria" },
        startAt: "2026-04-15T14:00:00.000Z",
      },
    ]);

    assert.equal(summary.rootType, "array");
    assert.equal(summary.arrayItemCount, 1);
    assert.deepEqual(summary.firstItemKeys.sort(), [
      "id",
      "patient",
      "startAt",
      "status",
    ]);
    assert.deepEqual(summary.fieldTypes, {
      id: "string",
      status: "string",
      patient: "object",
      startAt: "string",
    });
  });

  it("detecta possíveis campos de paginação", () => {
    const summary = analyzeStructure({
      page: 1,
      limit: 20,
      totalCount: 42,
      items: [],
    });

    assert.deepEqual(summary.possiblePaginationFields.sort(), [
      "limit",
      "page",
      "totalCount",
    ]);
  });

  it("detecta possíveis campos de identificação", () => {
    const summary = analyzeStructure({
      id: "x",
      appointmentId: "app-1",
      uuid: "abc",
      createdAt: "2026-04-15T14:00:00.000Z",
    });

    assert.deepEqual(summary.possibleIdFields.sort(), [
      "appointmentId",
      "id",
      "uuid",
    ]);
  });

  it("detecta possíveis campos de data e de status", () => {
    const summary = analyzeStructure({
      createdAt: "2026-04-15T14:00:00.000Z",
      startAt: "2026-04-15T14:00:00.000Z",
      status: "pending",
      state: "active",
    });

    assert.deepEqual(summary.possibleDateFields.sort(), [
      "createdAt",
      "startAt",
    ]);
    assert.deepEqual(summary.possibleStatusFields.sort(), ["state", "status"]);
  });

  it("não inventa campos que não existem na resposta", () => {
    const summary = analyzeStructure({
      id: "x",
      status: "ok",
    });

    assert.deepEqual(summary.possiblePaginationFields, []);
    assert.deepEqual(summary.possibleDateFields, []);
    assert.equal(summary.arrayItemCount, undefined);
    assert.deepEqual(summary.firstItemKeys.sort(), ["id", "status"]);
  });
});