import "@testing-library/jest-dom/vitest";
import { cleanup, fireEvent, render, screen } from "@testing-library/react";
import { afterEach, describe, expect, it, vi } from "vitest";
import { calculateRouteGuidance } from "@watermaps/shared";
import { CourseAssistantPanel } from "../src/components/CourseAssistantPanel";

afterEach(cleanup);

describe("CourseAssistantPanel", () => {
  it("shows the continuously calculated target course and correction", () => {
    const guidance = calculateRouteGuidance({
      route: [[0, 0], [0.02, 0]],
      position: { lon: 0.001, lat: 0 },
      headingDeg: 80,
      speedKn: 6,
      accuracyM: 5
    });
    const onStop = vi.fn();

    render(
      <CourseAssistantPanel
        guidance={guidance}
        gpsStatus="tracking"
        headingDeg={80}
        headingSource="COG"
        accuracyM={5}
        fixStale={false}
        onStop={onStop}
      />
    );

    expect(screen.getByRole("complementary", { name: "Kursassistent" })).toHaveTextContent("090°T");
    expect(screen.getByText("10° nach Steuerbord")).toBeVisible();
    expect(screen.getByText("Auf Route – Sollkurs wird mit jedem GPS-Fix angepasst.")).toBeVisible();
    expect(screen.getByText("IST COG").parentElement).toHaveTextContent("080°T");
    fireEvent.click(screen.getByRole("button", { name: "Kursassistent stoppen" }));
    expect(onStop).toHaveBeenCalledTimes(1);
  });

  it("suppresses steering advice while GPS accuracy is insufficient", () => {
    const guidance = calculateRouteGuidance({
      route: [[0, 0], [0.02, 0]],
      position: { lon: 0.001, lat: 0 },
      headingDeg: 80,
      speedKn: 6,
      accuracyM: 250
    });

    render(
      <CourseAssistantPanel
        guidance={guidance}
        gpsStatus="tracking"
        headingDeg={80}
        headingSource="COG"
        accuracyM={250}
        fixStale={false}
        onStop={vi.fn()}
      />
    );

    expect(guidance?.status).toBe("gps-unreliable");
    expect(screen.getByText("Keine verlässliche Steueranweisung")).toBeVisible();
    expect(screen.getByText(/GPS zu ungenau/)).toBeVisible();
    expect(screen.getByRole("complementary", { name: "Kursassistent" })).toHaveAttribute("data-alert", "true");
  });

  it("pauses when the latest GPS fix is stale", () => {
    render(
      <CourseAssistantPanel
        guidance={null}
        gpsStatus="tracking"
        headingDeg={null}
        headingSource="--"
        accuracyM={null}
        fixStale
        onStop={vi.fn()}
      />
    );

    expect(screen.getByText(/GPS-Fix ist veraltet/)).toBeVisible();
    expect(screen.getByText("---")).toBeVisible();
  });

  it("keeps every open route warning visible while guidance is active", () => {
    render(
      <CourseAssistantPanel
        guidance={null}
        gpsStatus="tracking"
        headingDeg={null}
        headingSource="--"
        accuracyM={null}
        fixStale={false}
        routeWarnings={[
          {
            code: "ROUTING_SOURCE",
            severity: "info",
            message: "Routingquelle: lokaler Graph."
          },
          {
            code: "BRIDGE_TOO_LOW",
            severity: "caution",
            message: "Eine Brücke ist zu niedrig."
          },
          {
            code: "ROUTE_SEARCH_LIMITED",
            severity: "caution",
            message: "Die Snap-Suche wurde begrenzt."
          },
          {
            code: "START_SNAP_TOO_FAR",
            severity: "caution",
            message: "Der Startpunkt liegt weit vom Fahrwasser entfernt."
          },
          {
            code: "DESTINATION_SNAP_TOO_FAR",
            severity: "caution",
            message: "Der Zielpunkt liegt weit vom Fahrwasser entfernt."
          }
        ]}
        onStop={vi.fn()}
      />
    );

    expect(screen.getByText("Hinweise (4)")).toBeVisible();
    expect(screen.getByText("Eine Brücke ist zu niedrig.")).toBeVisible();
    expect(screen.getByText("Die Snap-Suche wurde begrenzt.")).toBeVisible();
    expect(screen.getByText("Der Startpunkt liegt weit vom Fahrwasser entfernt.")).toBeVisible();
    expect(screen.getByText("Der Zielpunkt liegt weit vom Fahrwasser entfernt.")).toBeVisible();
    expect(screen.getByText("Routingdetails (1)")).toBeVisible();
  });
});