import fs from "node:fs";
import path from "node:path";
import request from "supertest";
import { describe, expect, it } from "vitest";
import { buildApp } from "../src/app.js";

const ROOT = path.resolve(path.dirname(new URL(import.meta.url).pathname), "../../");
const xml = fs.readFileSync(path.join(ROOT, "data/cases/base-case.xml"), "utf-8");

describe("quality gates", () => {
  it("cross-model comparison has finite residuals when both solvers run", async () => {
    const app = buildApp();
    const response = await request(app).post("/solve").send({ xml, solverModel: "both" });
    expect(response.status).toBe(200);
    const rms = response.body.comparison.residualSummary.rms;
    expect(Number.isFinite(rms)).toBe(true);
    expect(rms).toBeGreaterThan(0);
    expect(response.body.comparison.pointwiseResiduals.series.length).toBe(
      response.body.comparison.pointwiseResiduals.points
    );
  });

  it("perturbing rod friction changes peak polished load (field sensitivity)", async () => {
    const app = buildApp();
    const xmlHi = xml.replace(
      "<RodFrictionCoefficient>0.2</RodFrictionCoefficient>",
      "<RodFrictionCoefficient>0.28</RodFrictionCoefficient>"
    );
    const base = await request(app).post("/solve").send({ xml, solverModel: "fdm" });
    const perturbed = await request(app).post("/solve").send({ xml: xmlHi, solverModel: "fdm" });
    expect(base.status).toBe(200);
    expect(perturbed.status).toBe(200);
    expect(perturbed.body.solver.maxPolishedLoad).not.toBe(base.body.solver.maxPolishedLoad);
  });

  it("includes fieldTraceability on POST /solve", async () => {
    const app = buildApp();
    const response = await request(app).post("/solve").send({ xml });
    expect(response.status).toBe(200);
    expect(response.body.fieldTraceability?.schemaVersion).toBe(2);
    const pumpDepth = response.body.fieldTraceability.fields.find((f) => f.xmlKey === "PumpDepth");
    expect(pumpDepth?.category).toBe("physics");
  });
});