import {
  FLOW_DISPLAY_UNIT,
  metricForResultProperty,
  networkResultUnitsFromOptions,
  toDisplayValue,
  toM3h,
  toModelDisplayValue,
} from "./units";

describe("flow display units", () => {
  it("uses cubic meters per hour as the flow display unit", () => {
    expect(FLOW_DISPLAY_UNIT).toBe("m³/h");
  });

  it("converts L/s values to m³/h", () => {
    expect(toM3h(10, "lps")).toBe(36);
    expect(toM3h(10, "L/s")).toBe(36);
  });

  it("centralizes model and SCADA conversion for all UI consumers", () => {
    expect(toDisplayValue(2, "flow", "MLD")).toBeCloseTo(83.3333333334);
    expect(toDisplayValue(10, "pressure", "KPA")).toBeCloseTo(1.019716213);
    expect(toDisplayValue(2, "velocity", "ft/s")).toBeCloseTo(0.6096);
    expect(toDisplayValue(36, "flow", "m3/h")).toBe(36);
  });

  it("maps result properties to their physical metrics", () => {
    expect(metricForResultProperty("flow")).toBe("flow");
    expect(metricForResultProperty("base_demand")).toBe("flow");
    expect(metricForResultProperty("actual_demand")).toBe("flow");
    expect(metricForResultProperty("pressure")).toBe("pressure");
    expect(metricForResultProperty("velocity")).toBe("velocity");
    expect(metricForResultProperty("headloss")).toBeNull();
  });

  it("resolves legacy and v3 model options in one place", () => {
    expect(
      networkResultUnitsFromOptions({
        FLOW_UNITS: "MLD",
        PRESSURE_UNITS: "METERS",
      }),
    ).toEqual({ flow: "MLD", pressure: "METERS", velocity: "m/s" });
    expect(networkResultUnitsFromOptions({ UNITS: "GPM", PRESSURE: "PSI" }))
      .toEqual({ flow: "GPM", pressure: "PSI", velocity: "ft/s" });
  });

  it("converts model properties using project result units", () => {
    const units = { flow: "MLD", pressure: "KPA", velocity: "ft/s" };
    expect(toModelDisplayValue(2, "flow", units)).toBeCloseTo(83.3333333334);
    expect(toModelDisplayValue(10, "pressure", units)).toBeCloseTo(1.019716213);
    expect(toModelDisplayValue(2, "velocity", units)).toBeCloseTo(0.6096);
    expect(toModelDisplayValue(3, "headloss", units)).toBe(3);
  });
});