import { afterEach, describe, expect, it, vi } from "vitest";
import type { Coordinate, FairwayGraph } from "@watermaps/shared";
import { buildServer } from "../src/app.js";
import { loadEnv } from "../src/env.js";
import { createCache } from "../src/services/cache.js";
import {
  type FeatureDatabase,
  FeatureService
} from "../src/services/features.js";
import type {
  LockOperationInfo,
  NavigationDataAdapter
} from "../src/services/navigation-data.js";

const jsonResponse = (body: unknown) =>
  new Response(JSON.stringify(body), {
    status: 200,
    headers: { "content-type": "application/json" }
  });

const demoEnv = loadEnv({ NODE_ENV: "test", WATERMAPS_DEMO_DATA: "true" });
const productionEnv = loadEnv({ NODE_ENV: "test", WATERMAPS_DEMO_DATA: "false" });

const testFairwayGraph = (
  start: Coordinate,
  destination: Coordinate,
  id = "test-fairway"
): FairwayGraph => ({
  id,
  name: "Test fairway",
  maxSnapDistanceNm: 0.25,
  nodes: [
    { id: `${id}-start`, coordinate: start },
    { id: `${id}-destination`, coordinate: destination }
  ],
  edges: [
    {
      id: `${id}-edge`,
      name: "Test fairway edge",
      from: `${id}-start`,
      to: `${id}-destination`,
      coordinates: [start, destination],
      source: "test-fairway-source"
    }
  ]
});

const boundedSnapSearchFixture = () => {
  const start = { lat: 52.00035, lon: 7.0005 };
  const destination = { lat: 52, lon: 7.04 };
  const trapCoordinates = Array.from({ length: 8 }, (_, index) => ({
    lat: start.lat + (index - 4) * 0.000001,
    lon: start.lon
  }));
  const graph: FairwayGraph = {
    id: "api-bounded-snap-search",
    name: "API bounded snap search",
    maxSnapDistanceNm: 1,
    nodes: [
      { id: "junction", coordinate: { lat: 52, lon: 7 } },
      ...trapCoordinates.map((coordinate, index) => ({
        id: `trap-${index + 1}`,
        coordinate
      })),
      { id: "destination", coordinate: destination }
    ],
    edges: [
      ...trapCoordinates.map((coordinate, index) => ({
        id: `trap-${index + 1}`,
        name: `Trap ${index + 1}`,
        from: "junction",
        to: `trap-${index + 1}`,
        coordinates: [{ lat: 52, lon: 7 }, coordinate],
        oneway: true as const,
        source: `api-bounded-trap-${index + 1}`
      })),
      {
        id: "ninth-main-route",
        name: "Ninth main route",
        from: "junction",
        to: "destination",
        coordinates: [{ lat: 52, lon: 7 }, destination],
        oneway: true as const,
        source: "api-ninth-main-route"
      }
    ]
  };
  return { start, destination, graph };
};

describe("Watermaps API", () => {
  afterEach(() => {
    vi.restoreAllMocks();
  });

  it("returns app config with map layers", async () => {
    const app = await buildServer({ cache: createCache(), env: productionEnv });
    const response = await app.inject({ method: "GET", url: "/api/config" });

    expect(response.statusCode).toBe(200);
    expect(response.json().layers).toHaveLength(3);
    expect(response.json().featureFlags).toMatchObject({
      liveFairwayExtraction: false,
      postgisFeatures: false,
      bridgeAndDepthOverlays: false,
      lockAndHarbourContacts: false,
      routeEvents: false
    });
    await app.close();
  });

  it("advertises feature and contact capabilities only for a configured PostGIS source", async () => {
    const pool = {
      query: vi.fn().mockImplementation((sql: unknown) =>
        Promise.resolve(
          String(sql).includes("to_regclass")
            ? {
                rows: [
                  {
                    marine_features: "marine_features",
                    marine_fairway_edges: "marine_fairway_edges"
                  }
                ]
              }
            : {
                rows: [{ harbours: true, locks: true, bridges: true }]
              }
        )
      ),
      end: vi.fn().mockResolvedValue(undefined)
    } as unknown as FeatureDatabase;
    const featureService = new FeatureService(
      { databaseUrl: "postgres://features.test/watermaps", demoData: false },
      { pool }
    );
    const app = await buildServer({
      cache: createCache(),
      env: { ...productionEnv, liveOsmFairways: true },
      featureService
    });
    const response = await app.inject({ method: "GET", url: "/api/config" });

    expect(response.statusCode).toBe(200);
    expect(response.json().featureFlags).toMatchObject({
      liveFairwayExtraction: true,
      postgisFeatures: true,
      bridgeAndDepthOverlays: true,
      lockAndHarbourContacts: true,
      routeEvents: true
    });
    await app.close();
  });

  it("keeps route-event capabilities disabled until all event layers contain data", async () => {
    const pool = {
      query: vi.fn().mockImplementation((sql: unknown) =>
        Promise.resolve(
          String(sql).includes("to_regclass")
            ? {
                rows: [
                  {
                    marine_features: "marine_features",
                    marine_fairway_edges: "marine_fairway_edges"
                  }
                ]
              }
            : {
                rows: [{ harbours: false, locks: false, bridges: false }]
              }
        )
      ),
      end: vi.fn().mockResolvedValue(undefined)
    } as unknown as FeatureDatabase;
    const featureService = new FeatureService(
      { databaseUrl: "postgres://features.test/watermaps", demoData: false },
      { pool }
    );
    const app = await buildServer({
      cache: createCache(),
      env: productionEnv,
      featureService
    });
    const config = await app.inject({ method: "GET", url: "/api/config" });
    const readiness = await app.inject({ method: "GET", url: "/ready" });

    expect(config.statusCode).toBe(200);
    expect(config.json().featureFlags).toMatchObject({
      postgisFeatures: false,
      bridgeAndDepthOverlays: false,
      lockAndHarbourContacts: false,
      routeEvents: false
    });
    expect(readiness.statusCode).toBe(503);
    expect(readiness.json().checks.features).toEqual({
      ready: false,
      source: "postgis",
      detail: "data_missing",
      missingLayers: ["harbours", "locks", "bridges"]
    });
    await app.close();
  });

  it("does not advertise PostGIS capabilities when the configured database is unreachable", async () => {
    const pool = {
      query: vi.fn().mockRejectedValue(new Error("connection refused")),
      end: vi.fn().mockResolvedValue(undefined)
    } as unknown as FeatureDatabase;
    const featureService = new FeatureService(
      { databaseUrl: "postgres://features.test/watermaps", demoData: false },
      { pool }
    );
    const app = await buildServer({
      cache: createCache(),
      env: productionEnv,
      featureService
    });
    const config = await app.inject({ method: "GET", url: "/api/config" });
    const readiness = await app.inject({ method: "GET", url: "/ready" });

    expect(config.statusCode).toBe(200);
    expect(config.json().featureFlags).toMatchObject({
      postgisFeatures: false,
      bridgeAndDepthOverlays: false,
      lockAndHarbourContacts: false,
      routeEvents: false
    });
    expect(readiness.statusCode).toBe(503);
    expect(readiness.json().checks.features).toEqual({
      ready: false,
      source: "postgis",
      detail: "database_unreachable"
    });
    await app.close();
  });

  it("returns 503 when no feature source is configured", async () => {
    const app = await buildServer({ cache: createCache(), env: productionEnv });
    const response = await app.inject({
      method: "GET",
      url: "/api/features?bbox=7.1,53.3,7.5,53.5&layers=harbours,locks,bridges"
    });

    expect(response.statusCode).toBe(503);
    expect(response.json()).toEqual({
      error: "feature_source_unavailable",
      message: "Keine lokale Karten- und Ereignisdatenbank konfiguriert."
    });
    await app.close();
  });

  it("returns 503 when the configured feature database query fails", async () => {
    const pool = {
      query: vi.fn().mockRejectedValue(new Error("database unavailable")),
      end: vi.fn().mockResolvedValue(undefined)
    } as unknown as FeatureDatabase;
    const featureService = new FeatureService(
      { databaseUrl: "postgres://features.test/watermaps", demoData: false },
      { pool }
    );
    const app = await buildServer({
      cache: createCache(),
      env: productionEnv,
      featureService
    });
    const response = await app.inject({
      method: "GET",
      url: "/api/features?bbox=7.1,53.3,7.5,53.5&layers=harbours,locks,bridges"
    });

    expect(response.statusCode).toBe(503);
    expect(response.json()).toEqual({
      error: "feature_source_unavailable",
      message: "Die lokale Karten- und Ereignisdatenbank ist momentan nicht erreichbar."
    });
    await app.close();
  });

  it("separates liveness from feature-data readiness", async () => {
    const app = await buildServer({ cache: createCache(), env: productionEnv });
    const health = await app.inject({ method: "GET", url: "/health" });
    const readiness = await app.inject({ method: "GET", url: "/ready" });

    expect(health.statusCode).toBe(200);
    expect(health.json()).toMatchObject({
      ok: true,
      featureSource: "unavailable"
    });
    expect(readiness.statusCode).toBe(503);
    expect(readiness.json()).toEqual({
      ok: false,
      service: "watermaps-api",
      checks: {
        features: {
          ready: false,
          source: "unavailable",
          detail: "not_configured"
        }
      }
    });
    await app.close();
  });

  it("normalizes marine weather responses", async () => {
    const fetcher = vi
      .fn()
      .mockResolvedValueOnce(
        jsonResponse({
          current: {
            wave_height: 0.8,
            wave_direction: 280,
            wave_period: 4.2
          }
        })
      )
      .mockResolvedValueOnce(
        jsonResponse({
          current: {
            wind_speed_10m: 11,
            wind_direction_10m: 245,
            weather_code: 3,
            temperature_2m: 19
          }
        })
      );
    const app = await buildServer({ cache: createCache(), fetcher: fetcher as unknown as typeof fetch });
    const response = await app.inject({
      method: "GET",
      url: "/api/weather/marine?lat=54.18&lon=12.08"
    });

    expect(response.statusCode).toBe(200);
    expect(response.json()).toMatchObject({
      waveHeightM: 0.8,
      windSpeed: 11
    });
    await app.close();
  });

  it("returns partial marine weather when one provider request fails", async () => {
    const fetcher = vi
      .fn()
      .mockResolvedValueOnce(
        jsonResponse({
          current: {
            wave_height: 1.1,
            wave_direction: 290,
            wave_period: 5.3
          }
        })
      )
      .mockRejectedValueOnce(new Error("timeout"));
    const app = await buildServer({ cache: createCache(), fetcher: fetcher as unknown as typeof fetch });
    const response = await app.inject({
      method: "GET",
      url: "/api/weather/marine?lat=53.5&lon=7.1"
    });

    expect(response.statusCode).toBe(200);
    expect(response.json()).toMatchObject({
      waveHeightM: 1.1,
      windSpeed: null,
      source: "Open-Meteo Marine"
    });
    await app.close();
  });

  it("serves injected live navigation adapters and forwards bounded route filters", async () => {
    const lock: LockOperationInfo = {
      id: "lock-1",
      name: "Schleuse Hamm",
      waterway: "DHK",
      regularHours: "06:00-22:00",
      operatingState: "restricted",
      validFrom: "2026-07-20T04:00:00.000Z",
      validTo: "2026-07-20T20:00:00.000Z",
      phone: "+49 2381 1234",
      vhf: "Kanal 20",
      note: "Anmeldung erforderlich",
      updatedAt: "2026-07-19T12:00:00.000Z",
      sourceUrl: "https://www.elwis.de/DE/dynamisch/Schleuseninformationen/"
    };
    const load = vi.fn(async () => [lock]);
    const lockAdapter: NavigationDataAdapter<LockOperationInfo> = {
      kind: "lock-operations",
      id: "test-elwis-locks",
      label: "Test ELWIS locks",
      sourceUrl: "https://www.elwis.de/DE/dynamisch/Schleuseninformationen/",
      load
    };
    const app = await buildServer({
      cache: createCache(),
      navigationAdapters: {
        waterLevels: null,
        lockOperations: lockAdapter,
        notices: null
      }
    });

    const response = await app.inject({
      method: "GET",
      url: "/api/navigation/live?waterways=EMS,DHK,EMS&lockIds=lock-1,lock-2"
    });
    const body = response.json();

    expect(response.statusCode).toBe(200);
    expect(load).toHaveBeenCalledWith(
      { waterways: ["EMS", "DHK"], lockIds: ["lock-1", "lock-2"] },
      expect.objectContaining({ signal: expect.any(AbortSignal), fetcher: expect.any(Function) })
    );
    expect(body.lockOperations).toEqual([lock]);
    expect(body.sources).toEqual(
      expect.arrayContaining([
        expect.objectContaining({ kind: "lock-operations", id: "test-elwis-locks", state: "live" }),
        expect.objectContaining({ kind: "water-levels", state: "not-configured" }),
        expect.objectContaining({ kind: "notices", state: "not-configured" })
      ])
    );
    expect(body.generatedAt).toEqual(expect.any(String));
    await app.close();
  });

  it("rejects routes without a known fairway instead of returning a straight line", async () => {
    const app = await buildServer({
      cache: createCache(),
      env: productionEnv,
      fairwayService: {
        async getGraphsForRoute() {
          return { graphs: [], failures: [] };
        },
        async close() {}
      }
    });
    const response = await app.inject({
      method: "POST",
      url: "/api/routes",
      payload: {
        start: { lat: 54.1749, lon: 12.0731 },
        destination: { lat: 54.1833, lon: 12.0928 },
        vesselProfile: { draughtM: 1.4, safetyReserveM: 0.5, cruiseSpeedKn: 6 }
      }
    });
    const body = response.json();

    expect(response.statusCode).toBe(422);
    expect(body.error).toBe("no_fairway_route");
    expect(body.message).toContain("Keine Fahrwasserroute");
    await app.close();
  });

  it("reports unavailable fairway sources instead of claiming that no route exists", async () => {
    const app = await buildServer({
      cache: createCache(),
      env: productionEnv,
      fairwayService: {
        async getGraphsForRoute() {
          throw new AggregateError([new Error("local data missing"), new Error("Overpass timeout")]);
        },
        async close() {}
      }
    });
    const response = await app.inject({
      method: "POST",
      url: "/api/routes",
      payload: {
        start: { lat: 53.4498, lon: 7.4509 },
        destination: { lat: 53.4646, lon: 7.4742 },
        vesselProfile: { draughtM: 1.4, safetyReserveM: 0.5, cruiseSpeedKn: 6 }
      }
    });

    expect(response.statusCode).toBe(503);
    expect(response.json().error).toBe("fairway_sources_unavailable");
    await app.close();
  });

  it("reports a bounded dense-graph search instead of claiming that no route exists", async () => {
    const { start, destination, graph } = boundedSnapSearchFixture();
    const app = await buildServer({
      cache: createCache(),
      env: productionEnv,
      fairwayService: {
        async getGraphsForRoute() {
          return { graphs: [graph], failures: [] };
        },
        async close() {}
      }
    });
    const response = await app.inject({
      method: "POST",
      url: "/api/routes",
      payload: {
        start,
        destination,
        vesselProfile: { draughtM: 1, safetyReserveM: 0.3 }
      }
    });

    expect(response.statusCode).toBe(422);
    expect(response.json().error).toBe("fairway_search_limited");
    await app.close();
  });

  it("tries another available graph after one graph exhausts its search budget", async () => {
    const { start, destination, graph } = boundedSnapSearchFixture();
    const app = await buildServer({
      cache: createCache(),
      env: productionEnv,
      fairwayService: {
        async getGraphsForRoute() {
          return {
            graphs: [graph, testFairwayGraph(start, destination, "bounded-search-fallback")],
            failures: []
          };
        },
        async close() {}
      }
    });
    const response = await app.inject({
      method: "POST",
      url: "/api/routes",
      payload: {
        start,
        destination,
        vesselProfile: { draughtM: 1, safetyReserveM: 0.3 }
      }
    });

    expect(response.statusCode).toBe(200);
    expect(response.json().dataSources).toContain(
      "fairway-graph:bounded-search-fallback"
    );
    expect(
      response.json().warnings.some(
        (warning: { code: string }) => warning.code === "ROUTE_SEARCH_LIMITED"
      )
    ).toBe(true);
    await app.close();
  });

  it("returns 503 when a remaining graph cannot route and another source failed", async () => {
    const app = await buildServer({
      cache: createCache(),
      env: productionEnv,
      fairwayService: {
        async getGraphsForRoute() {
          return {
            graphs: [
              testFairwayGraph(
                { lat: 52, lon: 7 },
                { lat: 52.01, lon: 7.01 },
                "unrelated-live-graph"
              )
            ],
            failures: [{ source: "local", error: new Error("full local index unavailable") }]
          };
        },
        async close() {}
      }
    });
    const response = await app.inject({
      method: "POST",
      url: "/api/routes",
      payload: {
        start: { lat: 53.4498, lon: 7.4509 },
        destination: { lat: 53.4646, lon: 7.4742 },
        vesselProfile: { draughtM: 1.4, safetyReserveM: 0.5, cruiseSpeedKn: 6 }
      }
    });

    expect(response.statusCode).toBe(503);
    expect(response.json().error).toBe("fairway_sources_unavailable");
    await app.close();
  });

  it("uses a routable graph even when another fairway source failed", async () => {
    const start = { lat: 54, lon: 10 };
    const destination = { lat: 54.04, lon: 10.1 };
    const app = await buildServer({
      cache: createCache(),
      env: productionEnv,
      fairwayService: {
        async getGraphsForRoute() {
          return {
            graphs: [testFairwayGraph(start, destination, "available-live-graph")],
            failures: [{ source: "local", error: new Error("full local index unavailable") }]
          };
        },
        async close() {}
      }
    });
    const response = await app.inject({
      method: "POST",
      url: "/api/routes",
      payload: {
        start,
        destination,
        vesselProfile: { draughtM: 1.4, safetyReserveM: 0.5, cruiseSpeedKn: 6 }
      }
    });

    expect(response.statusCode).toBe(200);
    expect(response.json().dataSources).toContain(
      "fairway-graph:available-live-graph"
    );
    await app.close();
  });

  it("returns a fairway route from Emden Außenhafen to Borkum Reede", async () => {
    const app = await buildServer({ cache: createCache(), env: demoEnv });
    const response = await app.inject({
      method: "POST",
      url: "/api/routes",
      payload: {
        start: { lat: 53.344167, lon: 7.186111 },
        destination: { lat: 53.563776, lon: 6.750562 },
        vesselProfile: { draughtM: 1.4, safetyReserveM: 0.5, cruiseSpeedKn: 12 }
      }
    });
    const body = response.json();

    expect(response.statusCode).toBe(200);
    expect(body.routingMode).toBe("fairway");
    expect(body.dataSources).toContain("fairway-graph:ems-borkum-seed");
    expect(body.geometry.coordinates.length).toBeGreaterThan(20);
    await app.close();
  });

  it("plans the Norddeich–Norderney route for the reported coordinates", async () => {
    const app = await buildServer({
      cache: createCache(),
      fairwayService: {
        async getGraphsForRoute() {
          return {
            graphs: [
              {
              id: "norddeich-norderney-test",
              name: "Norddeich–Norderney",
              maxSnapDistanceNm: 0.5,
              nodes: [
                { id: "norddeich", coordinate: { lat: 53.6234, lon: 7.1559 } },
                { id: "fairway", coordinate: { lat: 53.66, lon: 7.16 } },
                { id: "norderney", coordinate: { lat: 53.7023, lon: 7.1658 } }
              ],
              edges: [
                {
                  id: "norddeich-approach",
                  name: "Norddeich Fahrwasser",
                  from: "norddeich",
                  to: "fairway",
                  source: "local-geofabrik-test",
                  coordinates: [
                    { lat: 53.6234, lon: 7.1559 },
                    { lat: 53.66, lon: 7.16 }
                  ]
                },
                {
                  id: "norderney-approach",
                  name: "Norderney Fahrwasser",
                  from: "fairway",
                  to: "norderney",
                  source: "local-geofabrik-test",
                  coordinates: [
                    { lat: 53.66, lon: 7.16 },
                    { lat: 53.7023, lon: 7.1658 }
                  ]
                }
              ]
              }
            ],
            failures: []
          };
        },
        async close() {}
      }
    });
    const response = await app.inject({
      method: "POST",
      url: "/api/routes",
      payload: {
        start: { lat: 53.6234, lon: 7.1559 },
        destination: { lat: 53.7023, lon: 7.1658 },
        vesselProfile: { draughtM: 1.4, safetyReserveM: 0.5, cruiseSpeedKn: 6 }
      }
    });
    const body = response.json();

    expect(response.statusCode).toBe(200);
    expect(body.routingMode).toBe("fairway");
    expect(body.geometry.coordinates[0]).toEqual([7.1559, 53.6234]);
    expect(body.geometry.coordinates.at(-1)).toEqual([7.1658, 53.7023]);
    expect(body.distanceNm).toBeGreaterThan(4);
    expect(body.distanceNm).toBeLessThan(6);
    await app.close();
  });

  it("routes from Emden into the eastern lower Ems when all dynamic sources fail", async () => {
    const app = await buildServer({
      cache: createCache(),
      env: demoEnv,
      fairwayService: {
        async getGraphsForRoute() {
          throw new AggregateError([new Error("PostGIS unavailable"), new Error("Overpass timeout")]);
        },
        async close() {}
      }
    });
    const response = await app.inject({
      method: "POST",
      url: "/api/routes",
      payload: {
        start: { lat: 53.3422, lon: 7.1871 },
        destination: { lat: 53.465, lon: 7.4734 },
        vesselProfile: { draughtM: 1.4, safetyReserveM: 0.5, cruiseSpeedKn: 6 }
      }
    });
    const body = response.json();

    expect(response.statusCode).toBe(200);
    expect(body.routingMode).toBe("fairway");
    expect(body.dataSources).toContain("fairway-graph:emden-east-ems-seed");
    expect(body.routeSnaps.start.requested).toEqual({ lat: 53.3422, lon: 7.1871 });
    expect(body.routeSnaps.destination.requested).toEqual({ lat: 53.465, lon: 7.4734 });
    expect(body.geometry.coordinates[0]).toEqual([
      body.routeSnaps.start.snapped.lon,
      body.routeSnaps.start.snapped.lat
    ]);
    expect(body.geometry.coordinates.at(-1)).toEqual([
      body.routeSnaps.destination.snapped.lon,
      body.routeSnaps.destination.snapped.lat
    ]);
    await app.close();
  });

  it("returns the inland fallback route from Emden to Hamm", async () => {
    const app = await buildServer({ cache: createCache(), env: demoEnv });
    const response = await app.inject({
      method: "POST",
      url: "/api/routes",
      payload: {
        start: { lat: 53.344167, lon: 7.186111 },
        destination: { lat: 51.6814536, lon: 7.8042615 },
        vesselProfile: { draughtM: 1.4, safetyReserveM: 0.5, cruiseSpeedKn: 6 }
      }
    });
    const body = response.json();

    expect(response.statusCode).toBe(200);
    expect(body.distanceNm).toBeGreaterThan(145);
    expect(body.distanceNm).toBeLessThan(165);
    expect(body.dataSources).toContain("fairway-graph:emden-hamm-inland-seed");
    expect(body.routeSnaps.destination.requested).toEqual({
      lat: 51.6814536,
      lon: 7.8042615
    });
    expect(body.geometry.coordinates.at(-1)).toEqual([
      body.routeSnaps.destination.snapped.lon,
      body.routeSnaps.destination.snapped.lat
    ]);
    await app.close();
  });

  it("uses an extracted fairway graph before the seed graph", async () => {
    const app = await buildServer({
      cache: createCache(),
      fairwayService: {
        async getGraphsForRoute() {
          return {
            graphs: [
              {
              id: "test-extracted",
              name: "Test Extracted Fairways",
              maxSnapDistanceNm: 1,
              nodes: [
                { id: "a", coordinate: { lat: 54, lon: 10 } },
                { id: "b", coordinate: { lat: 54.02, lon: 10.05 } },
                { id: "c", coordinate: { lat: 54.04, lon: 10.1 } }
              ],
              edges: [
                {
                  id: "ab",
                  name: "AB",
                  from: "a",
                  to: "b",
                  source: "test-overpass",
                  coordinates: [
                    { lat: 54, lon: 10 },
                    { lat: 54.02, lon: 10.05 }
                  ]
                },
                {
                  id: "bc",
                  name: "BC",
                  from: "b",
                  to: "c",
                  source: "test-overpass",
                  coordinates: [
                    { lat: 54.02, lon: 10.05 },
                    { lat: 54.04, lon: 10.1 }
                  ]
                }
              ]
              }
            ],
            failures: []
          };
        }
      }
    });
    const response = await app.inject({
      method: "POST",
      url: "/api/routes",
      payload: {
        start: { lat: 54, lon: 10 },
        destination: { lat: 54.04, lon: 10.1 },
        vesselProfile: { draughtM: 1.4, safetyReserveM: 0.5, cruiseSpeedKn: 6 }
      }
    });
    const body = response.json();

    expect(response.statusCode).toBe(200);
    expect(body.routingMode).toBe("fairway");
    expect(body.dataSources).toContain("fairway-graph:test-extracted");
    expect(body.dataSources).toContain("test-overpass");
    await app.close();
  });

  it("uses a shared local component for the reported Emden-Delfzijl coordinates", async () => {
    const coordinate = (lat: number, lon: number) => ({ lat, lon });
    const app = await buildServer({
      cache: createCache(),
      fairwayService: {
        async getGraphsForRoute() {
          return {
            graphs: [
              {
              id: "local-geofabrik-component-snap",
              name: "Lokaler Geofabrik-Komponententest",
              maxSnapDistanceNm: 0.3,
              nodes: [
                { id: "start-decoy-a", coordinate: coordinate(53.3416, 7.186) },
                { id: "start-decoy-b", coordinate: coordinate(53.342, 7.187) },
                { id: "destination-decoy-a", coordinate: coordinate(53.3282, 6.9304) },
                { id: "destination-decoy-b", coordinate: coordinate(53.3286, 6.9294) },
                { id: "shared-start", coordinate: coordinate(53.34145, 7.18585) },
                { id: "shared-east", coordinate: coordinate(53.3321722, 7.1329034) },
                { id: "shared-south", coordinate: coordinate(53.313849, 7.0011017) },
                { id: "shared-destination", coordinate: coordinate(53.32805, 6.9302) }
              ],
              edges: [
                {
                  id: "start-decoy",
                  name: "Nähere getrennte Startkante",
                  from: "start-decoy-a",
                  to: "start-decoy-b",
                  coordinates: [coordinate(53.3416, 7.186), coordinate(53.342, 7.187)],
                  source: "closer-but-disconnected-start"
                },
                {
                  id: "destination-decoy",
                  name: "Nähere getrennte Zielkante",
                  from: "destination-decoy-a",
                  to: "destination-decoy-b",
                  coordinates: [coordinate(53.3282, 6.9304), coordinate(53.3286, 6.9294)],
                  source: "closer-but-disconnected-destination"
                },
                {
                  id: "shared-east",
                  name: "Gemeinsamer lokaler Korridor Ost",
                  from: "shared-start",
                  to: "shared-east",
                  coordinates: [coordinate(53.34145, 7.18585), coordinate(53.3321722, 7.1329034)],
                  source: "local-geofabrik-germany+netherlands"
                },
                {
                  id: "shared-south",
                  name: "Gemeinsamer lokaler Korridor Süd",
                  from: "shared-east",
                  to: "shared-south",
                  coordinates: [coordinate(53.3321722, 7.1329034), coordinate(53.313849, 7.0011017)],
                  source: "local-geofabrik-germany+netherlands"
                },
                {
                  id: "shared-west",
                  name: "Gemeinsamer lokaler Korridor West",
                  from: "shared-south",
                  to: "shared-destination",
                  coordinates: [coordinate(53.313849, 7.0011017), coordinate(53.32805, 6.9302)],
                  source: "local-geofabrik-germany+netherlands"
                }
              ]
              }
            ],
            failures: []
          };
        },
        async close() {}
      }
    });
    const response = await app.inject({
      method: "POST",
      url: "/api/routes",
      payload: {
        start: { lat: 53.3416, lon: 7.186 },
        destination: { lat: 53.3282, lon: 6.9304 },
        vesselProfile: { draughtM: 1, safetyReserveM: 0.3 }
      }
    });
    const body = response.json();

    expect(response.statusCode).toBe(200);
    expect(body.routingMode).toBe("fairway");
    expect(body.geometry.coordinates[0]).toEqual([
      body.routeSnaps.start.snapped.lon,
      body.routeSnaps.start.snapped.lat
    ]);
    expect(body.geometry.coordinates.at(-1)).toEqual([
      body.routeSnaps.destination.snapped.lon,
      body.routeSnaps.destination.snapped.lat
    ]);
    expect(body.routeSnaps.start.requested).toEqual({ lat: 53.3416, lon: 7.186 });
    expect(body.routeSnaps.destination.requested).toEqual({ lat: 53.3282, lon: 6.9304 });
    expect(body.dataSources).toContain("local-geofabrik-germany+netherlands");
    expect(body.dataSources).not.toContain("fairway-graph:ems-borkum-seed");
    expect(body.dataSources).not.toContain("closer-but-disconnected-start");
    expect(body.dataSources).not.toContain("closer-but-disconnected-destination");
    await app.close();
  });

  it("returns distinct route alternatives when the waterway graph contains them", async () => {
    const coordinate = (lat: number, lon: number) => ({ lat, lon });
    const edge = (id: string, from: string, to: string, coordinates: Array<{ lat: number; lon: number }>) => ({
      id,
      name: id,
      from,
      to,
      coordinates,
      source: "test-alternatives"
    });
    const app = await buildServer({
      cache: createCache(),
      fairwayService: {
        async getGraphsForRoute() {
          return {
            graphs: [
              {
              id: "api-alternatives",
              name: "API Alternativen",
              maxSnapDistanceNm: 0.2,
              nodes: [
                { id: "start", coordinate: coordinate(52, 7) },
                { id: "branch-in", coordinate: coordinate(52, 7.01) },
                { id: "upper", coordinate: coordinate(52.012, 7.03) },
                { id: "lower", coordinate: coordinate(51.988, 7.03) },
                { id: "branch-out", coordinate: coordinate(52, 7.05) },
                { id: "destination", coordinate: coordinate(52, 7.06) }
              ],
              edges: [
                edge("start-access", "start", "branch-in", [coordinate(52, 7), coordinate(52, 7.01)]),
                edge("main", "branch-in", "branch-out", [coordinate(52, 7.01), coordinate(52, 7.05)]),
                edge("upper-in", "branch-in", "upper", [coordinate(52, 7.01), coordinate(52.012, 7.03)]),
                edge("upper-out", "upper", "branch-out", [coordinate(52.012, 7.03), coordinate(52, 7.05)]),
                edge("lower-in", "branch-in", "lower", [coordinate(52, 7.01), coordinate(51.988, 7.03)]),
                edge("lower-out", "lower", "branch-out", [coordinate(51.988, 7.03), coordinate(52, 7.05)]),
                edge("destination-access", "branch-out", "destination", [coordinate(52, 7.05), coordinate(52, 7.06)])
              ]
              }
            ],
            failures: []
          };
        }
      }
    });
    const response = await app.inject({
      method: "POST",
      url: "/api/routes",
      payload: {
        start: coordinate(52, 7),
        destination: coordinate(52, 7.06),
        vesselProfile: { draughtM: 1.2, safetyReserveM: 0.3, cruiseSpeedKn: 6 }
      }
    });
    const body = response.json();

    expect(response.statusCode).toBe(200);
    expect(body.name).toBe("Hauptroute");
    expect(body.alternatives).toHaveLength(2);
    expect(body.alternatives.map((route: { name: string }) => route.name)).toEqual(["Alternative 1", "Alternative 2"]);
    await app.close();
  });
});