import { describe, expect, test, vi } from 'vitest';
import { NextRequest } from 'next/server';
import type { ClassroomGenerationJob } from '@/lib/server/classroom-job-store';
import { observeClassroomJobAuthorization } from '@/lib/server/authz/classroom-job-shadow';
import { observeResourceAuthorization } from '@/lib/server/authz/shadow-observer';

const request = new NextRequest('https://server.example/api/generate-classroom/job-1');

function job(owner: string | undefined, includeOwner = true): ClassroomGenerationJob {
  return {
    id: 'job-1',
    ...(includeOwner ? { ownerPrincipalId: owner } : {}),
    status: 'failed',
    step: 'failed',
    progress: 100,
    message: 'Failed',
    createdAt: '2026-08-15T00:00:00.000Z',
    updatedAt: '2026-08-15T00:00:00.000Z',
    inputSummary: {
      requirementPreview: 'topic',
      hasPdf: false,
      pdfTextLength: 0,
      pdfImageCount: 0,
    },
    input: { requirement: 'topic' },
    scenesGenerated: 0,
  };
}

describe('observe-only resource authorization', () => {
  test('reports a decision through parameter-injected dependencies', async () => {
    const observer = vi.fn();
    await observeResourceAuthorization(
      {
        request,
        resourceType: 'classroom-generation-job',
        resourceId: 'job-1',
        action: 'read',
        ownership: { state: 'owned', ownerPrincipalId: 'principal-1' },
      },
      {
        resolvePrincipal: async () => ({
          state: 'authenticated',
          principal: {
            principalId: 'principal-1',
            kind: 'user',
            capabilities: [],
            authMethod: 'session',
          },
        }),
        observer,
      },
    );

    expect(observer).toHaveBeenCalledWith({
      resourceType: 'classroom-generation-job',
      resourceId: 'job-1',
      action: 'read',
      principalState: 'authenticated',
      ownershipState: 'owned',
      decision: { effect: 'allow', reason: 'owner_match' },
    });
  });

  test('contains observer and resolver failures', async () => {
    await expect(
      observeResourceAuthorization(
        {
          request,
          resourceType: 'classroom-generation-job',
          resourceId: 'job-1',
          action: 'delete',
          ownership: { state: 'legacy-unowned' },
        },
        {
          resolvePrincipal: async () => ({
            state: 'unavailable',
            reason: 'resolver_not_configured',
          }),
          observer: () => {
            throw new Error('observer failed');
          },
        },
      ),
    ).resolves.toBeUndefined();

    await expect(
      observeResourceAuthorization(
        {
          request,
          resourceType: 'classroom-generation-job',
          resourceId: 'job-1',
          action: 'delete',
          ownership: { state: 'legacy-unowned' },
        },
        {
          resolvePrincipal: async () => {
            throw new Error('resolver failed');
          },
          observer: vi.fn(),
        },
      ),
    ).resolves.toBeUndefined();
  });

  test('classifies absent legacy owners and malformed owners as indeterminate', async () => {
    const observations: unknown[] = [];
    const deps = {
      resolvePrincipal: async () => ({
        state: 'unavailable' as const,
        reason: 'resolver_not_configured' as const,
      }),
      observer: (observation: unknown) => {
        observations.push(observation);
      },
    };

    await observeClassroomJobAuthorization(request, job(undefined, false), 'read', deps);
    await observeClassroomJobAuthorization(request, job(undefined), 'delete', deps);

    expect(observations).toEqual([
      expect.objectContaining({
        ownershipState: 'legacy-unowned',
        decision: { effect: 'indeterminate', reason: 'owner_missing' },
      }),
      expect.objectContaining({
        ownershipState: 'unknown',
        decision: { effect: 'indeterminate', reason: 'owner_unknown' },
      }),
    ]);
  });

  test('classifies a temporary device binding as guest ownership', async () => {
    const observer = vi.fn();
    const guestJob = {
      ...job(undefined, false),
      guestPrincipalId: 'device-1',
      ownershipBoundAt: '2026-08-16T00:00:00.000Z',
    };

    await observeClassroomJobAuthorization(request, guestJob, 'read', {
      resolvePrincipal: async () => ({
        state: 'authenticated',
        principal: {
          principalId: 'device-1',
          kind: 'device',
          capabilities: [],
          authMethod: 'device-proof',
        },
      }),
      observer,
    });

    expect(observer).toHaveBeenCalledWith(
      expect.objectContaining({
        ownershipState: 'guest-owned',
        decision: { effect: 'allow', reason: 'guest_match' },
      }),
    );
  });

  test('fails closed when a persisted job contains both owner and guest subjects', async () => {
    const observer = vi.fn();
    await observeClassroomJobAuthorization(
      request,
      {
        ...job('account-1'),
        guestPrincipalId: 'device-1',
      },
      'read',
      {
        resolvePrincipal: async () => ({
          state: 'authenticated',
          principal: {
            principalId: 'account-1',
            kind: 'user',
            capabilities: [],
            authMethod: 'session',
          },
        }),
        observer,
      },
    );

    expect(observer).toHaveBeenCalledWith(
      expect.objectContaining({
        ownershipState: 'unknown',
        decision: { effect: 'indeterminate', reason: 'owner_unknown' },
      }),
    );
  });
});