import { describe, expect, it } from "vitest";
import { normalizeMarineForecast } from "../src/services/weather.js";

describe("departure-time marine forecast", () => {
  it("selects waves, wind and ocean current nearest the requested passage time", () => {
    const result = normalizeMarineForecast(
      {
        hourly: {
          time: ["2026-07-20T08:00", "2026-07-20T09:00"],
          wave_height: [0.6, 0.9],
          wave_direction: [280, 290],
          wave_period: [4, 5],
          ocean_current_velocity: [0.4, 1.1],
          ocean_current_direction: [90, 100],
          sea_level_height_msl: [0.2, 0.4]
        }
      },
      {
        hourly: {
          time: ["2026-07-20T08:00", "2026-07-20T09:00"],
          wind_speed_10m: [8, 12],
          wind_direction_10m: [240, 250],
          weather_code: [2, 3],
          temperature_2m: [18, 19]
        }
      },
      { marineAvailable: true, weatherAvailable: true },
      "2026-07-20T08:40:00.000Z"
    );

    expect(result).toMatchObject({
      waveHeightM: 0.9,
      windSpeed: 12,
      oceanCurrentSpeedKn: 1.1,
      oceanCurrentDirectionDeg: 100,
      seaLevelHeightMslM: 0.4,
      forecastTime: "2026-07-20T09:00:00.000Z"
    });
  });

  it("does not reuse the edge of the forecast as if it covered a much later departure", () => {
    const result = normalizeMarineForecast(
      {
        hourly: {
          time: ["2026-07-20T08:00"],
          wave_height: [0.6],
          wave_direction: [280],
          wave_period: [4],
          ocean_current_velocity: [0.4],
          ocean_current_direction: [90],
          sea_level_height_msl: [0.2]
        }
      },
      {
        hourly: {
          time: ["2026-07-20T08:00"],
          wind_speed_10m: [8],
          wind_direction_10m: [240],
          weather_code: [2],
          temperature_2m: [18]
        }
      },
      { marineAvailable: true, weatherAvailable: true },
      "2026-07-24T08:00:00.000Z"
    );

    expect(result).toMatchObject({
      waveHeightM: null,
      windSpeed: null,
      oceanCurrentSpeedKn: null,
      oceanCurrentDirectionDeg: null
    });
  });
});