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

import {
  createHandler as createTenancyHandler,
  listHandler as listTenanciesHandler,
} from '@/app/api/v1/berths/[id]/tenancies/handlers';
import {
  getHandler as getTenancyHandler,
  patchHandler as patchTenancyHandler,
  deleteHandler as deleteTenancyHandler,
} from '@/app/api/v1/tenancies/[id]/handlers';
import { db } from '@/lib/db';
import { berthTenancies } from '@/lib/db/schema/tenancies';
import { enableTenanciesModule } from '@/lib/services/tenancies-module.service';
import { makeMockCtx, makeMockRequest } from '../../helpers/route-tester';
import {
  makeBerth,
  makeClient,
  makeFullPermissions,
  makePort,
  makeSalesAgentPermissions,
  makeYacht,
} from '../../helpers/factories';

/** Wrap makePort so every test in this file operates against a port that
 *  has the tenancies module enabled — the API handlers assertModuleEnabled
 *  up front (P5 design) and would otherwise 404 every call. */
async function makePortWithTenancies(): Promise<Awaited<ReturnType<typeof makePort>>> {
  const port = await makePort();
  await enableTenanciesModule(port.id);
  return port;
}

// ─── POST /api/v1/berths/[id]/tenancies ───────────────────────────────────

describe('POST /api/v1/berths/[id]/tenancies', () => {
  it('creates pending reservation (201)', async () => {
    const port = await makePortWithTenancies();
    const berth = 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 ctx = makeMockCtx({ portId: port.id, permissions: makeFullPermissions() });

    const req = makeMockRequest('POST', `http://localhost/api/v1/berths/${berth.id}/tenancies`, {
      body: {
        clientId: client.id,
        yachtId: yacht.id,
        startDate: new Date().toISOString(),
      },
    });
    const res = await createTenancyHandler(req, ctx, { id: berth.id });
    expect(res.status).toBe(201);
    const body = (await res.json()) as any;
    expect(body.data.berthId).toBe(berth.id);
    expect(body.data.clientId).toBe(client.id);
    expect(body.data.yachtId).toBe(yacht.id);
    expect(body.data.status).toBe('pending');
  });

  it('returns 400 when yacht does not belong to reservation client', async () => {
    const port = await makePortWithTenancies();
    const berth = await makeBerth({ portId: port.id });
    const ownerClient = await makeClient({ portId: port.id });
    const otherClient = await makeClient({ portId: port.id });
    const yacht = await makeYacht({
      portId: port.id,
      ownerType: 'client',
      ownerId: ownerClient.id,
    });
    const ctx = makeMockCtx({ portId: port.id, permissions: makeFullPermissions() });

    const req = makeMockRequest('POST', `http://localhost/api/v1/berths/${berth.id}/tenancies`, {
      body: {
        clientId: otherClient.id,
        yachtId: yacht.id,
        startDate: new Date().toISOString(),
      },
    });
    const res = await createTenancyHandler(req, ctx, { id: berth.id });
    expect(res.status).toBe(400);
  });

  it('returns 404 when berth is cross-tenant', async () => {
    const portA = await makePortWithTenancies();
    const portB = await makePortWithTenancies();
    const berthA = await makeBerth({ portId: portA.id });
    const client = await makeClient({ portId: portB.id });
    const yacht = await makeYacht({
      portId: portB.id,
      ownerType: 'client',
      ownerId: client.id,
    });
    // Caller is scoped to portB but the URL berth lives in portA.
    const ctxB = makeMockCtx({ portId: portB.id, permissions: makeFullPermissions() });

    const req = makeMockRequest('POST', `http://localhost/api/v1/berths/${berthA.id}/tenancies`, {
      body: {
        clientId: client.id,
        yachtId: yacht.id,
        startDate: new Date().toISOString(),
      },
    });
    const res = await createTenancyHandler(req, ctxB, { id: berthA.id });
    expect(res.status).toBe(404);
  });

  it('ignores berthId from body, uses URL param instead', async () => {
    const port = await makePortWithTenancies();
    const urlBerth = await makeBerth({ portId: port.id });
    const bodyBerth = 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 ctx = makeMockCtx({ portId: port.id, permissions: makeFullPermissions() });

    const req = makeMockRequest('POST', `http://localhost/api/v1/berths/${urlBerth.id}/tenancies`, {
      body: {
        berthId: bodyBerth.id,
        clientId: client.id,
        yachtId: yacht.id,
        startDate: new Date().toISOString(),
      },
    });
    const res = await createTenancyHandler(req, ctx, { id: urlBerth.id });
    expect(res.status).toBe(201);
    const body = (await res.json()) as any;
    expect(body.data.berthId).toBe(urlBerth.id);
    expect(body.data.berthId).not.toBe(bodyBerth.id);
  });
});

// ─── GET /api/v1/berths/[id]/tenancies ────────────────────────────────────

describe('GET /api/v1/berths/[id]/tenancies', () => {
  it('returns reservations filtered by that berth', async () => {
    const port = await makePortWithTenancies();
    const berthA = await makeBerth({ portId: port.id });
    const berthB = 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 ctx = makeMockCtx({ portId: port.id, permissions: makeFullPermissions() });

    // Create a reservation for berthA.
    await createTenancyHandler(
      makeMockRequest('POST', `http://localhost/api/v1/berths/${berthA.id}/tenancies`, {
        body: {
          clientId: client.id,
          yachtId: yacht.id,
          startDate: new Date().toISOString(),
        },
      }),
      ctx,
      { id: berthA.id },
    );

    // Create a reservation for berthB.
    await createTenancyHandler(
      makeMockRequest('POST', `http://localhost/api/v1/berths/${berthB.id}/tenancies`, {
        body: {
          clientId: client.id,
          yachtId: yacht.id,
          startDate: new Date().toISOString(),
        },
      }),
      ctx,
      { id: berthB.id },
    );

    const res = await listTenanciesHandler(
      makeMockRequest('GET', `http://localhost/api/v1/berths/${berthA.id}/tenancies`),
      ctx,
      { id: berthA.id },
    );
    expect(res.status).toBe(200);
    const body = (await res.json()) as any;
    expect(body.data.length).toBe(1);
    expect(body.data[0].berthId).toBe(berthA.id);
  });
});

// ─── GET /api/v1/tenancies/[id] ─────────────────────────────────────

describe('GET /api/v1/tenancies/[id]', () => {
  it('returns the reservation', async () => {
    const port = await makePortWithTenancies();
    const berth = 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 ctx = makeMockCtx({ portId: port.id, permissions: makeFullPermissions() });

    const createRes = await createTenancyHandler(
      makeMockRequest('POST', `http://localhost/api/v1/berths/${berth.id}/tenancies`, {
        body: {
          clientId: client.id,
          yachtId: yacht.id,
          startDate: new Date().toISOString(),
        },
      }),
      ctx,
      { id: berth.id },
    );
    const reservation = ((await createRes.json()) as any).data;

    const res = await getTenancyHandler(
      makeMockRequest('GET', `http://localhost/api/v1/tenancies/${reservation.id}`),
      ctx,
      { id: reservation.id },
    );
    expect(res.status).toBe(200);
    const body = (await res.json()) as any;
    expect(body.data.id).toBe(reservation.id);
  });

  it('returns 404 for cross-tenant', async () => {
    const portA = await makePortWithTenancies();
    const portB = await makePortWithTenancies();
    const berth = await makeBerth({ portId: portA.id });
    const client = await makeClient({ portId: portA.id });
    const yacht = await makeYacht({
      portId: portA.id,
      ownerType: 'client',
      ownerId: client.id,
    });
    const ctxA = makeMockCtx({ portId: portA.id, permissions: makeFullPermissions() });

    const createRes = await createTenancyHandler(
      makeMockRequest('POST', `http://localhost/api/v1/berths/${berth.id}/tenancies`, {
        body: {
          clientId: client.id,
          yachtId: yacht.id,
          startDate: new Date().toISOString(),
        },
      }),
      ctxA,
      { id: berth.id },
    );
    const reservation = ((await createRes.json()) as any).data;

    const ctxB = makeMockCtx({ portId: portB.id, permissions: makeFullPermissions() });
    const res = await getTenancyHandler(
      makeMockRequest('GET', `http://localhost/api/v1/tenancies/${reservation.id}`),
      ctxB,
      { id: reservation.id },
    );
    expect(res.status).toBe(404);
  });
});

// ─── PATCH /api/v1/tenancies/[id] ───────────────────────────────────

describe('PATCH /api/v1/tenancies/[id]', () => {
  async function seedReservation() {
    const port = await makePortWithTenancies();
    const berth = 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 ctx = makeMockCtx({ portId: port.id, permissions: makeFullPermissions() });

    const createRes = await createTenancyHandler(
      makeMockRequest('POST', `http://localhost/api/v1/berths/${berth.id}/tenancies`, {
        body: {
          clientId: client.id,
          yachtId: yacht.id,
          startDate: new Date().toISOString(),
        },
      }),
      ctx,
      { id: berth.id },
    );
    const reservation = ((await createRes.json()) as any).data;
    return { port, berth, client, yacht, ctx, reservation };
  }

  it('activate: pending → active (200)', async () => {
    const { ctx, reservation } = await seedReservation();
    const res = await patchTenancyHandler(
      makeMockRequest('PATCH', `http://localhost/api/v1/tenancies/${reservation.id}`, {
        body: { action: 'activate' },
      }),
      ctx,
      { id: reservation.id },
    );
    expect(res.status).toBe(200);
    const body = (await res.json()) as any;
    expect(body.data.status).toBe('active');
  });

  it('end: active → ended (200)', async () => {
    const { ctx, reservation } = await seedReservation();

    // First activate.
    await patchTenancyHandler(
      makeMockRequest('PATCH', `http://localhost/api/v1/tenancies/${reservation.id}`, {
        body: { action: 'activate' },
      }),
      ctx,
      { id: reservation.id },
    );

    // Then end.
    const endDate = new Date('2027-01-01T00:00:00.000Z');
    const res = await patchTenancyHandler(
      makeMockRequest('PATCH', `http://localhost/api/v1/tenancies/${reservation.id}`, {
        body: {
          action: 'end',
          endDate: endDate.toISOString(),
          notes: 'tenant moved',
        },
      }),
      ctx,
      { id: reservation.id },
    );
    expect(res.status).toBe(200);
    const body = (await res.json()) as any;
    expect(body.data.status).toBe('ended');
    expect(new Date(body.data.endDate).toISOString()).toBe(endDate.toISOString());
  });

  it('cancel: pending → cancelled (200)', async () => {
    const { ctx, reservation } = await seedReservation();
    const res = await patchTenancyHandler(
      makeMockRequest('PATCH', `http://localhost/api/v1/tenancies/${reservation.id}`, {
        body: { action: 'cancel', reason: 'client changed mind' },
      }),
      ctx,
      { id: reservation.id },
    );
    expect(res.status).toBe(200);
    const body = (await res.json()) as any;
    expect(body.data.status).toBe('cancelled');
  });

  it('returns 400 on invalid transition (ended → activate)', async () => {
    const { ctx, reservation } = await seedReservation();

    // pending → active.
    await patchTenancyHandler(
      makeMockRequest('PATCH', `http://localhost/api/v1/tenancies/${reservation.id}`, {
        body: { action: 'activate' },
      }),
      ctx,
      { id: reservation.id },
    );
    // active → ended.
    await patchTenancyHandler(
      makeMockRequest('PATCH', `http://localhost/api/v1/tenancies/${reservation.id}`, {
        body: {
          action: 'end',
          endDate: new Date().toISOString(),
        },
      }),
      ctx,
      { id: reservation.id },
    );

    // ended → activate should fail.
    const res = await patchTenancyHandler(
      makeMockRequest('PATCH', `http://localhost/api/v1/tenancies/${reservation.id}`, {
        body: { action: 'activate' },
      }),
      ctx,
      { id: reservation.id },
    );
    expect(res.status).toBe(400);
  });

  it('returns 400 on invalid body shape (action missing)', async () => {
    const { ctx, reservation } = await seedReservation();
    const res = await patchTenancyHandler(
      makeMockRequest('PATCH', `http://localhost/api/v1/tenancies/${reservation.id}`, {
        body: { notes: 'noop' },
      }),
      ctx,
      { id: reservation.id },
    );
    expect(res.status).toBe(400);
  });

  it('returns 403 when caller lacks tenancies.manage for activate action', async () => {
    const { port, reservation } = await seedReservation();
    // Viewer-like permissions: no manage.
    const ctx = makeMockCtx({
      portId: port.id,
      permissions: {
        ...makeSalesAgentPermissions(),
        tenancies: { view: true, manage: false, cancel: true },
      },
    });
    const res = await patchTenancyHandler(
      makeMockRequest('PATCH', `http://localhost/api/v1/tenancies/${reservation.id}`, {
        body: { action: 'activate' },
      }),
      ctx,
      { id: reservation.id },
    );
    expect(res.status).toBe(403);
  });

  it('returns 403 when caller lacks tenancies.cancel for cancel action', async () => {
    const { port, reservation } = await seedReservation();
    // Sales agent - has manage but NOT cancel.
    const ctx = makeMockCtx({
      portId: port.id,
      permissions: makeSalesAgentPermissions(),
    });
    const res = await patchTenancyHandler(
      makeMockRequest('PATCH', `http://localhost/api/v1/tenancies/${reservation.id}`, {
        body: { action: 'cancel', reason: 'test' },
      }),
      ctx,
      { id: reservation.id },
    );
    expect(res.status).toBe(403);

    // But activate succeeds with the same permissions set.
    const activateRes = await patchTenancyHandler(
      makeMockRequest('PATCH', `http://localhost/api/v1/tenancies/${reservation.id}`, {
        body: { action: 'activate' },
      }),
      ctx,
      { id: reservation.id },
    );
    expect(activateRes.status).toBe(200);
  });
});

// ─── DELETE /api/v1/tenancies/[id] ──────────────────────────────────

describe('DELETE /api/v1/tenancies/[id]', () => {
  it('cancels the reservation (204)', async () => {
    const port = await makePortWithTenancies();
    const berth = 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 ctx = makeMockCtx({ portId: port.id, permissions: makeFullPermissions() });

    const createRes = await createTenancyHandler(
      makeMockRequest('POST', `http://localhost/api/v1/berths/${berth.id}/tenancies`, {
        body: {
          clientId: client.id,
          yachtId: yacht.id,
          startDate: new Date().toISOString(),
        },
      }),
      ctx,
      { id: berth.id },
    );
    const reservation = ((await createRes.json()) as any).data;

    const delRes = await deleteTenancyHandler(
      makeMockRequest('DELETE', `http://localhost/api/v1/tenancies/${reservation.id}`),
      ctx,
      { id: reservation.id },
    );
    expect(delRes.status).toBe(204);

    const [row] = await db
      .select()
      .from(berthTenancies)
      .where(eq(berthTenancies.id, reservation.id));
    expect(row?.status).toBe('cancelled');
  });
});
