/**
 * Analytics service integration tests — exercise the four computations
 * against a seeded port + assert the cache layer reads/writes correctly.
 */

import { describe, it, expect } from 'vitest';
import { eq, and } from 'drizzle-orm';

import { db } from '@/lib/db';
import { interests } from '@/lib/db/schema/interests';
import { invoices } from '@/lib/db/schema/financial';
import { berthReservations } from '@/lib/db/schema/reservations';
import { analyticsSnapshots } from '@/lib/db/schema/insights';
import {
  computePipelineFunnel,
  computeOccupancyTimeline,
  computeRevenueBreakdown,
  computeLeadSourceAttribution,
  getPipelineFunnel,
  refreshSnapshotsForPort,
  ALL_METRICS,
  ALL_RANGES,
  SNAPSHOT_TTL_MS,
} from '@/lib/services/analytics.service';
import { makePort, makeClient, makeBerth, makeYacht } from '../helpers/factories';

describe('analytics service', () => {
  describe('computePipelineFunnel', () => {
    it('aggregates interests by stage with conversion percentages', async () => {
      const port = await makePort();
      const client = await makeClient({ portId: port.id });
      // 3 open, 2 details_sent, 1 visited
      for (const stage of ['open', 'open', 'open', 'details_sent', 'details_sent', 'visited']) {
        await db.insert(interests).values({
          portId: port.id,
          clientId: client.id,
          pipelineStage: stage,
        });
      }

      const result = await computePipelineFunnel(port.id, '30d');

      const open = result.stages.find((s) => s.stage === 'open');
      const details = result.stages.find((s) => s.stage === 'details_sent');
      const visited = result.stages.find((s) => s.stage === 'visited');
      expect(open?.count).toBe(3);
      expect(open?.conversionPct).toBe(100);
      expect(details?.count).toBe(2);
      expect(details?.conversionPct).toBeCloseTo(66.7, 0);
      expect(visited?.count).toBe(1);
      expect(visited?.conversionPct).toBeCloseTo(33.3, 0);
    });

    it('returns zeros when port has no interests', async () => {
      const port = await makePort();
      const result = await computePipelineFunnel(port.id, '30d');
      expect(result.stages).toHaveLength(8);
      expect(result.stages.every((s) => s.count === 0)).toBe(true);
    });
  });

  describe('computeOccupancyTimeline', () => {
    it('returns 7 points for 7d range with occupancy percentages', async () => {
      const port = await makePort();
      await makeBerth({ portId: port.id });
      await makeBerth({ portId: port.id });
      const client = await makeClient({ portId: port.id });
      const yacht = await makeYacht({
        portId: port.id,
        ownerType: 'client',
        ownerId: client.id,
      });
      const berth = await makeBerth({ portId: port.id });
      // Active reservation covering today
      await db.insert(berthReservations).values({
        portId: port.id,
        berthId: berth.id,
        clientId: client.id,
        yachtId: yacht.id,
        status: 'active',
        startDate: new Date(Date.now() - 5 * 86_400_000),
        createdBy: 'seed',
      });

      const result = await computeOccupancyTimeline(port.id, '7d');
      expect(result.points).toHaveLength(7);
      // Last point is today; should reflect 1/3 occupancy.
      const today = result.points[result.points.length - 1]!;
      expect(today.total).toBe(3);
      expect(today.occupied).toBe(1);
      expect(today.occupancyPct).toBeCloseTo(33.3, 0);
    });
  });

  describe('computeRevenueBreakdown', () => {
    it('groups invoice totals by status and currency', async () => {
      const port = await makePort();
      const baseInvoice = {
        portId: port.id,
        clientName: 'Acme',
        billingEntityType: 'client' as const,
        billingEntityId: 'client-id',
        dueDate: '2026-12-31',
        currency: 'USD',
        subtotal: '0',
        createdBy: 'seed',
      };
      await db.insert(invoices).values([
        { ...baseInvoice, invoiceNumber: 'INV-001', total: '1000', status: 'paid' },
        { ...baseInvoice, invoiceNumber: 'INV-002', total: '500', status: 'paid' },
        { ...baseInvoice, invoiceNumber: 'INV-003', total: '2000', status: 'sent' },
      ]);

      const result = await computeRevenueBreakdown(port.id, '30d');
      const paid = result.bars.find((b) => b.status === 'paid');
      const sent = result.bars.find((b) => b.status === 'sent');
      expect(paid?.amount).toBe(1500);
      expect(sent?.amount).toBe(2000);
    });
  });

  describe('computeLeadSourceAttribution', () => {
    it('counts interests grouped by source descending', async () => {
      const port = await makePort();
      const client = await makeClient({ portId: port.id });
      for (const source of ['website', 'website', 'website', 'manual', 'referral', 'referral']) {
        await db.insert(interests).values({
          portId: port.id,
          clientId: client.id,
          pipelineStage: 'open',
          source,
        });
      }

      const result = await computeLeadSourceAttribution(port.id, '30d');
      expect(result.slices[0]).toEqual({ source: 'website', count: 3 });
      expect(result.slices[1]).toEqual({ source: 'referral', count: 2 });
      expect(result.slices[2]).toEqual({ source: 'manual', count: 1 });
    });

    it('groups null source as "unspecified"', async () => {
      const port = await makePort();
      const client = await makeClient({ portId: port.id });
      await db.insert(interests).values({
        portId: port.id,
        clientId: client.id,
        pipelineStage: 'open',
        source: null,
      });

      const result = await computeLeadSourceAttribution(port.id, '30d');
      expect(result.slices.find((s) => s.source === 'unspecified')?.count).toBe(1);
    });
  });

  describe('cache', () => {
    it('getPipelineFunnel writes a snapshot and returns it on subsequent calls', async () => {
      const port = await makePort();
      const client = await makeClient({ portId: port.id });
      await db.insert(interests).values({
        portId: port.id,
        clientId: client.id,
        pipelineStage: 'open',
      });

      const first = await getPipelineFunnel(port.id, '30d');
      // Snapshot written.
      const row = await db.query.analyticsSnapshots.findFirst({
        where: and(
          eq(analyticsSnapshots.portId, port.id),
          eq(analyticsSnapshots.metricId, 'pipeline_funnel.30d'),
        ),
      });
      expect(row).toBeDefined();
      expect(row?.data).toEqual(first);

      // Mutate the snapshot row directly to confirm cache is being read,
      // not recomputed.
      const sentinel = { stages: [{ stage: 'sentinel', count: 999, conversionPct: 0 }] };
      await db
        .update(analyticsSnapshots)
        .set({ data: sentinel })
        .where(
          and(
            eq(analyticsSnapshots.portId, port.id),
            eq(analyticsSnapshots.metricId, 'pipeline_funnel.30d'),
          ),
        );
      const second = await getPipelineFunnel(port.id, '30d');
      expect(second).toEqual(sentinel);
    });

    it('refreshSnapshotsForPort warms every metric × range combo', async () => {
      const port = await makePort();
      await refreshSnapshotsForPort(port.id);
      const rows = await db
        .select({ metricId: analyticsSnapshots.metricId })
        .from(analyticsSnapshots)
        .where(eq(analyticsSnapshots.portId, port.id));
      const expected = ALL_METRICS.length * ALL_RANGES.length;
      expect(rows).toHaveLength(expected);
    });

    it('snapshot ttl constant is 15 minutes', () => {
      expect(SNAPSHOT_TTL_MS).toBe(15 * 60 * 1000);
    });
  });
});