import { afterEach, describe, expect, it, vi } from "vitest";
import { buildServer } from "../src/app.js";
import { createCache } from "../src/services/cache.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" }
  });

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

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

    expect(response.statusCode).toBe(200);
    expect(response.json().layers).toHaveLength(3);
    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("returns critical route warnings for shallow samples", async () => {
    const app = await buildServer({ cache: createCache() });
    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: 1.5, safetyReserveM: 0.4 },
        depthSamples: [{ coordinate: { lat: 53.442996, lon: 6.833146 }, depthM: 1.6 }]
      }
    });

    expect(response.statusCode).toBe(200);
    expect(response.json().warnings.some((warning: { severity: string }) => warning.severity === "critical")).toBe(
      true
    );
    await app.close();
  });

  it("rejects routes without a known fairway instead of returning a straight line", async () => {
    const app = await buildServer({ cache: createCache() });
    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("returns a fairway route from Emden Außenhafen to Borkum Reede", async () => {
    const app = await buildServer({ cache: createCache() });
    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);
    expect(body.warnings.some((warning: { code: string }) => warning.code === "FAIRWAY_ROUTE")).toBe(true);
    await app.close();
  });

  it("returns the inland fallback route from Emden to Hamm", async () => {
    const app = await buildServer({ cache: createCache() });
    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.geometry.coordinates.at(-1)).toEqual([7.8042615, 51.6814536]);
    await app.close();
  });

  it("uses an extracted fairway graph before the seed graph", async () => {
    const app = await buildServer({
      cache: createCache(),
      fairwayService: {
        async getGraphsForRoute() {
          return [
            {
              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",
                  minDepthM: 4,
                  source: "test-overpass",
                  coordinates: [
                    { lat: 54, lon: 10 },
                    { lat: 54.02, lon: 10.05 }
                  ]
                },
                {
                  id: "bc",
                  name: "BC",
                  from: "b",
                  to: "c",
                  minDepthM: 4,
                  source: "test-overpass",
                  coordinates: [
                    { lat: 54.02, lon: 10.05 },
                    { lat: 54.04, lon: 10.1 }
                  ]
                }
              ]
            }
          ];
        }
      }
    });
    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("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,
      minDepthM: 4,
      source: "test-alternatives"
    });
    const app = await buildServer({
      cache: createCache(),
      fairwayService: {
        async getGraphsForRoute() {
          return [
            {
              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)])
              ]
            }
          ];
        }
      }
    });
    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();
  });
});