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const test = require("node:test");
const assert = require("node:assert/strict");
const {
displayStepForLength,
profileBandForSlope,
officialProfileSections,
} = require("../static/official-climb-profile-logic.js");
test("selects a display step that keeps long profiles readable", () => {
assert.equal(displayStepForLength(2_400), 100);
assert.equal(displayStepForLength(4_500), 200);
assert.equal(displayStepForLength(7_000), 500);
assert.equal(displayStepForLength(20_000), 1000);
});
test("assigns each slope to its color band", () => {
assert.equal(profileBandForSlope(-0.1), "downhill");
assert.equal(profileBandForSlope(2.9), "0-3");
assert.equal(profileBandForSlope(3), "3-6");
assert.equal(profileBandForSlope(6), "6-9");
assert.equal(profileBandForSlope(9), "9-12");
assert.equal(profileBandForSlope(12), "12-plus");
});
test("interpolates profile sections at the selected step", () => {
const points = [
{ distanceKm: 0, elevationM: 100 },
{ distanceKm: 0.12, elevationM: 106 },
{ distanceKm: 0.2, elevationM: 114 },
{ distanceKm: 0.25, elevationM: 120 },
];
const sections = officialProfileSections(points, 0, 3, 100);
assert.equal(sections.length, 3);
assert.equal(sections[0].startDistanceKm, 0);
assert.equal(sections[0].endDistanceKm, 0.1);
assert.equal(sections[0].startElevation, 100);
assert.equal(sections[0].endElevation, 105);
assert.equal(sections[2].endDistanceKm, 0.25);
assert.equal(sections[2].endElevation, 120);
});
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