// @ts-check
// Tests: G1–G4 — buildJourneySegments algorithm correctness
// These tests load the italy-2025 map page (which has GPX) to get MapUtils in scope,
// then call the functions with synthetic data via page.evaluate.
// Requires demo data: run `make demo-load` before this suite.
const { test, expect } = require('@playwright/test');

async function getMapUtils(page) {
    await page.goto('/trips/italy-2025/map');
    await expect(page.locator('canvas.maplibregl-canvas')).toBeVisible({ timeout: 10000 });
}

// G1: No GPX → all pairs connected in one segment
test('G1: all markers connected when no GPX files present', async ({ page }) => {
    await getMapUtils(page);

    var count = await page.evaluate(function () {
        var entries = [
            { lat: '43.0', lng: '11.0', force_connect: false },
            { lat: '44.0', lng: '12.0', force_connect: false },
            { lat: '45.0', lng: '13.0', force_connect: false }
        ];
        return MapUtils.buildJourneySegments(entries, [], 10).length;
    });

    expect(count).toBe(1);
});

// G2: Same GPX file covers both markers → connector suppressed (0 segments)
test('G2: connector suppressed when same GPX file covers both markers', async ({ page }) => {
    await getMapUtils(page);

    var count = await page.evaluate(function () {
        var e1 = { lat: '43.000', lng: '11.000', force_connect: false };
        var e2 = { lat: '43.010', lng: '11.010', force_connect: false };
        // Trackpoints covering both (stored as [lat, lng])
        var track = [[43.000, 11.000], [43.005, 11.005], [43.010, 11.010]];
        return MapUtils.buildJourneySegments([e1, e2], [track], 10).length;
    });

    expect(count).toBe(0);
});

// G3: force_connect overrides GPX suppression
test('G3: force_connect keeps connector even when GPX covers both markers', async ({ page }) => {
    await getMapUtils(page);

    var count = await page.evaluate(function () {
        var e1 = { lat: '43.000', lng: '11.000', force_connect: false };
        var e2 = { lat: '43.010', lng: '11.010', force_connect: true };
        var track = [[43.000, 11.000], [43.005, 11.005], [43.010, 11.010]];
        return MapUtils.buildJourneySegments([e1, e2], [track], 10).length;
    });

    expect(count).toBe(1);
});

// G4: Markers near DIFFERENT GPX files → connector kept
test('G4: connector kept when markers are near different GPX files', async ({ page }) => {
    await getMapUtils(page);

    var count = await page.evaluate(function () {
        var e1 = { lat: '43.000', lng: '11.000', force_connect: false };
        var e2 = { lat: '45.000', lng: '13.000', force_connect: false };
        // Two separate files — each only covers one marker
        var trackA = [[43.000, 11.000], [43.005, 11.005]]; // near e1 only
        var trackB = [[45.000, 13.000], [45.005, 13.005]]; // near e2 only
        return MapUtils.buildJourneySegments([e1, e2], [trackA, trackB], 10).length;
    });

    expect(count).toBe(1);
});

// G5: First pair suppressed, second pair kept → one segment [e2, e3]
test('G5: suppressed first pair leaves one segment from e2 to e3', async ({ page }) => {
    await getMapUtils(page);

    var count = await page.evaluate(function () {
        // e1→e2: covered by track → suppressed; e1 is orphaned (< 2 pts, not pushed)
        // e2→e3: not covered → connector kept → segment [e2, e3]
        var e1 = { lat: '43.000', lng: '11.000', force_connect: false };
        var e2 = { lat: '43.010', lng: '11.010', force_connect: false };
        var e3 = { lat: '45.000', lng: '13.000', force_connect: false };
        var track = [[43.000, 11.000], [43.005, 11.005], [43.010, 11.010]]; // covers e1 and e2 only
        var segs = MapUtils.buildJourneySegments([e1, e2, e3], [track], 10);
        return segs.length;
    });

    expect(count).toBe(1); // one segment: [e2 → e3]
});