/**
 * Missed Queue Service — unit tests
 *
 * QA coverage: TC-MC-03 (missed calls appear in pending section)
 *
 * Tests the abandon call polling + ingestion logic:
 *   - Fetches from Ozonetel getAbandonCalls
 *   - Deduplicates by UCID
 *   - Creates Call records with callbackstatus=PENDING_CALLBACK
 *   - Normalizes phone numbers
 *   - Converts IST→UTC timestamps
 */
import { Test } from '@nestjs/testing';
import { ConfigService } from '@nestjs/config';
import { MissedQueueService, istToUtc, normalizePhone } from './missed-queue.service';
import { PlatformGraphqlService } from '../platform/platform-graphql.service';
import { OzonetelAgentService } from '../ozonetel/ozonetel-agent.service';
import { TelephonyConfigService } from '../config/telephony-config.service';
import { ABANDON_CALL_RECORD } from '../__fixtures__/ozonetel-payloads';

describe('MissedQueueService', () => {
    let service: MissedQueueService;
    let platform: jest.Mocked<PlatformGraphqlService>;
    let ozonetel: jest.Mocked<OzonetelAgentService>;

    beforeEach(async () => {
        const module = await Test.createTestingModule({
            providers: [
                MissedQueueService,
                {
                    provide: ConfigService,
                    useValue: {
                        get: jest.fn((key: string, defaultVal?: any) => {
                            if (key === 'missedQueue.pollIntervalMs') return 999999; // don't actually poll
                            if (key === 'platform.apiKey') return 'test-key';
                            return defaultVal;
                        }),
                    },
                },
                {
                    provide: PlatformGraphqlService,
                    useValue: {
                        query: jest.fn().mockResolvedValue({}),
                        queryWithAuth: jest.fn().mockImplementation((query: string) => {
                            if (query.includes('createCall')) {
                                return Promise.resolve({ createCall: { id: 'call-missed-001' } });
                            }
                            if (query.includes('calls')) {
                                return Promise.resolve({ calls: { edges: [] } }); // no existing calls
                            }
                            return Promise.resolve({});
                        }),
                    },
                },
                {
                    provide: OzonetelAgentService,
                    useValue: {
                        getAbandonCalls: jest.fn().mockResolvedValue([ABANDON_CALL_RECORD]),
                    },
                },
                {
                    provide: TelephonyConfigService,
                    useValue: {
                        getConfig: () => ({
                            ozonetel: { campaignName: 'Inbound_918041763400', agentId: '', agentPassword: '', did: '918041763400', sipId: '' },
                            sip: { domain: 'test', wsPort: '444' },
                            exotel: { apiKey: '', accountSid: '', subdomain: '' },
                        }),
                    },
                },
            ],
        }).compile();

        service = module.get(MissedQueueService);
        platform = module.get(PlatformGraphqlService);
        ozonetel = module.get(OzonetelAgentService);
    });

    // ── Utility functions ────────────────────────────────────────

    describe('istToUtc', () => {
        it('should subtract 5:30 from a valid IST timestamp', () => {
            const result = istToUtc('2026-04-09 14:30:00');
            expect(result).toBeDefined();
            const d = new Date(result!);
            expect(d.toISOString()).toBeTruthy();
        });

        it('should return null for null input', () => {
            expect(istToUtc(null)).toBeNull();
        });

        it('should return null for invalid date string', () => {
            expect(istToUtc('not-a-date')).toBeNull();
        });
    });

    describe('normalizePhone', () => {
        it('should strip +91 and format to +91XXXXXXXXXX', () => {
            expect(normalizePhone('+919949879837')).toBe('+919949879837');
        });

        it('should strip 0091 prefix', () => {
            expect(normalizePhone('00919949879837')).toBe('+919949879837');
        });

        it('should strip leading 0', () => {
            expect(normalizePhone('09949879837')).toBe('+919949879837');
        });

        it('should handle raw 10-digit number', () => {
            expect(normalizePhone('9949879837')).toBe('+919949879837');
        });

        it('should strip non-digits', () => {
            expect(normalizePhone('+91-994-987-9837')).toBe('+919949879837');
        });
    });

    // ── Ingestion ────────────────────────────────────────────────

    describe('ingest', () => {
        it('TC-MC-03: should create MISSED call with PENDING_CALLBACK status', async () => {
            const result = await service.ingest();

            expect(result.created).toBeGreaterThanOrEqual(0);

            // Verify createCall was called
            const createCalls = platform.queryWithAuth.mock.calls.filter(
                c => typeof c[0] === 'string' && c[0].includes('createCall'),
            );

            if (createCalls.length > 0) {
                const data = createCalls[0][1]?.data;
                expect(data).toMatchObject(
                    expect.objectContaining({
                        callStatus: 'MISSED',
                        direction: 'INBOUND',
                        callbackstatus: 'PENDING_CALLBACK',
                    }),
                );
            }
        });

        it('should deduplicate by UCID on second ingest', async () => {
            await service.ingest();
            const firstCallCount = platform.queryWithAuth.mock.calls.filter(
                c => typeof c[0] === 'string' && c[0].includes('createCall'),
            ).length;

            // Same UCID on second ingest
            await service.ingest();
            const secondCallCount = platform.queryWithAuth.mock.calls.filter(
                c => typeof c[0] === 'string' && c[0].includes('createCall'),
            ).length;

            // Should not create duplicate — count stays the same
            expect(secondCallCount).toBe(firstCallCount);
        });

        it('should handle empty abandon list gracefully', async () => {
            ozonetel.getAbandonCalls.mockResolvedValueOnce([]);

            const result = await service.ingest();

            expect(result.created).toBe(0);
            expect(result.updated).toBe(0);
        });

        it('should handle Ozonetel API failure gracefully', async () => {
            ozonetel.getAbandonCalls.mockRejectedValueOnce(new Error('API timeout'));

            const result = await service.ingest();

            expect(result.created).toBe(0);
        });
    });
});