import { describe, it, expect } from 'vitest';
import {
  bodyToOurs,
  vesselToOurs,
  buildSnapshot,
  krpcSituationToOurs,
  type KRPCBody,
  type KRPCState,
} from '../src/convert.js';

describe('krpcSituationToOurs', () => {
  it('maps known kRPC enum values to our strings', () => {
    expect(krpcSituationToOurs(1)).toBe('ORBITING');
    expect(krpcSituationToOurs(2)).toBe('ESCAPING');
    expect(krpcSituationToOurs(3)).toBe('LANDED');
    expect(krpcSituationToOurs(4)).toBe('SPLASHED');
  });

  it('returns UNKNOWN for unmapped values', () => {
    expect(krpcSituationToOurs(99)).toBe('UNKNOWN');
    expect(krpcSituationToOurs(-1)).toBe('UNKNOWN');
  });
});

describe('bodyToOurs', () => {
  it('normalizes the body name to a lowercase id', () => {
    const ksp: KRPCBody = {
      name: 'Kerbin',
      kind: 'planet',
      parentId: 'Kerbol',
      radius: 600_000,
      sphereOfInfluence: 84_159_286,
      gravitationalParameter: 3.5316e12,
      rotationPeriod: 21_600,
      axialTilt: 0,
      orbit: {
        semiMajorAxis: 13_599_840_256,
        eccentricity: 0.05,
        inclination: 0,
        longitudeOfAscendingNode: 0,
        argumentOfPeriapsis: 0,
        meanAnomalyAtEpoch: 0,
        epoch: 0,
      },
    };
    const ours = bodyToOurs(ksp);
    expect(ours.id).toBe('kerbin');
    expect(ours.parentId).toBe('kerbol');
    expect(ours.name).toBe('Kerbin');
    expect(ours.kind).toBe('planet');
    expect(ours.radius).toBe(600_000);
  });

  it('handles multi-word names', () => {
    const ksp: KRPCBody = {
      name: 'Tylo',
      kind: 'moon',
      parentId: 'Jool',
      radius: 375_000,
      sphereOfInfluence: 10_856_418,
      gravitationalParameter: 2.122e11,
      rotationPeriod: 84_600,
      axialTilt: 0,
      orbit: {
        semiMajorAxis: 68_500_000,
        eccentricity: 0,
        inclination: 0,
        longitudeOfAscendingNode: 0,
        argumentOfPeriapsis: 0,
        meanAnomalyAtEpoch: 0,
        epoch: 0,
      },
    };
    const ours = bodyToOurs(ksp);
    expect(ours.id).toBe('tylo');
  });

  it('preserves null parentId for the star', () => {
    const ksp: KRPCBody = {
      name: 'Kerbol',
      kind: 'star',
      parentId: null,
      radius: 261_600_000,
      sphereOfInfluence: 1e30,
      gravitationalParameter: 1.172332794e18,
      rotationPeriod: 432_000,
      axialTilt: 0,
      orbit: {
        semiMajorAxis: 0,
        eccentricity: 0,
        inclination: 0,
        longitudeOfAscendingNode: 0,
        argumentOfPeriapsis: 0,
        meanAnomalyAtEpoch: 0,
        epoch: 0,
      },
    };
    const ours = bodyToOurs(ksp);
    expect(ours.parentId).toBeNull();
  });
});

describe('vesselToOurs', () => {
  it('maps situation enum and assigns ACTIVE status', () => {
    const ours = vesselToOurs({
      id: 'v-1',
      name: 'Probe',
      type: 'Probe',
      owner: 'KASA',
      situation: 'ORBITING',
      orbit: {
        semiMajorAxis: 7e6,
        eccentricity: 0,
        inclination: 0,
        longitudeOfAscendingNode: 0,
        argumentOfPeriapsis: 0,
        meanAnomalyAtEpoch: 0,
        epoch: 0,
      },
      referenceBodyId: 'kerbin',
      createdAt: '2026-01-01T00:00:00Z',
    });
    expect(ours.situation).toBe('ORBITING');
    expect(ours.status).toBe('ACTIVE');
    expect(ours.retiredAt).toBeNull();
    expect(ours.owner).toBe('KASA');
  });
});

describe('buildSnapshot', () => {
  it('produces a valid UniverseSnapshot from a KRPCState', () => {
    const state: KRPCState = {
      ut: 100,
      bodies: [
        {
          name: 'Kerbol',
          kind: 'star',
          parentId: null,
          radius: 1,
          sphereOfInfluence: 1e30,
          gravitationalParameter: 1,
          rotationPeriod: 1,
          axialTilt: 0,
          orbit: {
            semiMajorAxis: 0,
            eccentricity: 0,
            inclination: 0,
            longitudeOfAscendingNode: 0,
            argumentOfPeriapsis: 0,
            meanAnomalyAtEpoch: 0,
            epoch: 0,
          },
        },
        {
          name: 'Kerbin',
          kind: 'planet',
          parentId: 'Kerbol',
          radius: 600_000,
          sphereOfInfluence: 84_159_286,
          gravitationalParameter: 3.5316e12,
          rotationPeriod: 21_600,
          axialTilt: 0,
          orbit: {
            semiMajorAxis: 13_599_840_256,
            eccentricity: 0,
            inclination: 0,
            longitudeOfAscendingNode: 0,
            argumentOfPeriapsis: 0,
            meanAnomalyAtEpoch: 0,
            epoch: 0,
          },
        },
      ],
      vessels: [
        {
          id: 'v1',
          name: 'Probe',
          type: 'Probe',
          owner: 'KASA',
          situation: 1, // ORBITING
          orbit: {
            semiMajorAxis: 7e6,
            eccentricity: 0,
            inclination: 0,
            longitudeOfAscendingNode: 0,
            argumentOfPeriapsis: 0,
            meanAnomalyAtEpoch: 0,
            epoch: 0,
          },
          referenceBodyId: 'Kerbin',
          createdAt: '2026-01-01T00:00:00Z',
        },
      ],
      groundStations: [
        { id: 'montana', name: 'Montana', bodyId: 'Kerbin', lat: 47, lon: -110, alt: 0 },
      ],
    };

    const snap = buildSnapshot(state, '2026-01-01T00:00:00Z');
    expect(snap.ut).toBe(100);
    expect(snap.capturedAt).toBe('2026-01-01T00:00:00Z');
    expect(snap.bodies).toHaveLength(2);
    expect(snap.bodies[0]!.id).toBe('kerbol');
    expect(snap.bodies[0]!.parentId).toBeNull();
    expect(snap.bodies[1]!.id).toBe('kerbin');
    expect(snap.bodies[1]!.parentId).toBe('kerbol');
    expect(snap.vessels).toHaveLength(1);
    expect(snap.vessels[0]!.situation).toBe('ORBITING');
    expect(snap.vessels[0]!.referenceBodyId).toBe('kerbin');
    expect(snap.groundStations).toHaveLength(1);
  });
});