import { ForbiddenException, NotFoundException } from '@nestjs/common';
import { Role } from '@prisma/client';
import { describe, expect, it, vi } from 'vitest';

// `forTenant` reicht den Klienten durch — Mandantenbindung selbst prueft
// rls-access-inventory.spec.ts; hier zaehlt, mit welchen Argumenten je Methode
// gebunden wird (mit oder ohne Benutzer).
vi.mock('../prisma/prisma-tenant.extension', () => ({
  forTenant: vi.fn((p: unknown) => p),
}));

import { forTenant } from '../prisma/prisma-tenant.extension';
import { CustomModulesService } from './custom-modules.service';

function makeFakePrisma() {
  const rows = new Map<string, any>();
  let seq = 0;
  const customModule = {
    create: vi.fn(async ({ data }: { data: any }) => {
      const id = `cm-${++seq}`;
      const row = { id, createdAt: new Date(), updatedAt: new Date(), ...data };
      rows.set(id, row);
      return row;
    }),
    findMany: vi.fn(async ({ where, orderBy }: { where?: any; orderBy?: any } = {}) => {
      let list = [...rows.values()];
      if (where?.tenantId) list = list.filter((r) => r.tenantId === where.tenantId);
      if (where?.OR) {
        list = list.filter((r) =>
          where.OR.some((c: { ownerUserId: string | null }) => r.ownerUserId === c.ownerUserId),
        );
      }
      if (orderBy?.name === 'asc') list.sort((a, b) => a.name.localeCompare(b.name));
      return list;
    }),
    findUnique: vi.fn(async ({ where }: { where: { id: string } }) => rows.get(where.id) ?? null),
    update: vi.fn(async ({ where, data }: { where: { id: string }; data: any }) => {
      const row = { ...rows.get(where.id), ...data };
      rows.set(where.id, row);
      return row;
    }),
    delete: vi.fn(async ({ where }: { where: { id: string } }) => {
      rows.delete(where.id);
    }),
  };
  return { customModule, rows };
}

const dto = { name: 'Wiki', url: 'https://example.com', category: 'infrastructure' as const };
const admin = { id: 'admin1', role: Role.ADMIN };
const userA = { id: 'ua', role: Role.USER };
const userB = { id: 'ub', role: Role.USER };

function setup() {
  const prisma = makeFakePrisma();
  return { prisma, service: new CustomModulesService(prisma as any) };
}

describe('CustomModulesService — anlegen', () => {
  it('speichert tenantId aus dem Argument, nie aus dem DTO', async () => {
    const { prisma, service } = setup();
    await service.create('t1', userA, { ...dto, tenantId: 'evil' } as any);
    expect(prisma.customModule.create.mock.calls[0][0].data.tenantId).toBe('t1');
  });

  it('ohne shared-Angabe ist der Eintrag persoenlich (ownerUserId = Aufrufer)', async () => {
    const { prisma, service } = setup();
    const res: any = await service.create('t1', userA, dto);
    expect(prisma.customModule.create.mock.calls[0][0].data.ownerUserId).toBe('ua');
    expect(res.personal).toBe(true);
    expect(res).not.toHaveProperty('ownerUserId');
  });

  it('auch ein Administrator legt ohne shared persoenlich an', async () => {
    const { prisma, service } = setup();
    const res: any = await service.create('t1', admin, dto);
    expect(prisma.customModule.create.mock.calls[0][0].data.ownerUserId).toBe('admin1');
    expect(res.personal).toBe(true);
  });

  it('shared: true durch einen Administrator legt einen gemeinsamen Eintrag an', async () => {
    const { prisma, service } = setup();
    const res: any = await service.create('t1', admin, { ...dto, shared: true });
    expect(prisma.customModule.create.mock.calls[0][0].data.ownerUserId).toBeNull();
    expect(res.personal).toBe(false);
  });

  it('shared: true durch einen normalen Benutzer -> ForbiddenException, nichts gespeichert', async () => {
    const { prisma, service } = setup();
    await expect(service.create('t1', userA, { ...dto, shared: true })).rejects.toBeInstanceOf(
      ForbiddenException,
    );
    expect(prisma.customModule.create).not.toHaveBeenCalled();
  });

  it('shared: false durch einen normalen Benutzer bleibt persoenlich', async () => {
    const { prisma, service } = setup();
    await service.create('t1', userA, { ...dto, shared: false });
    expect(prisma.customModule.create.mock.calls[0][0].data.ownerUserId).toBe('ua');
  });

  it('das Feld shared landet nie in den gespeicherten Daten', async () => {
    const { prisma, service } = setup();
    await service.create('t1', admin, { ...dto, shared: true });
    expect(prisma.customModule.create.mock.calls[0][0].data).not.toHaveProperty('shared');
  });
});

describe('CustomModulesService — lesen', () => {
  it('list liefert gemeinsame plus eigene Eintraege, nie die eines anderen Benutzers', async () => {
    const { service } = setup();
    await service.create('t1', admin, { ...dto, name: 'Gemeinsam', shared: true });
    await service.create('t1', userA, { ...dto, name: 'A-privat' });
    await service.create('t1', userB, { ...dto, name: 'B-privat' });
    const resA: any[] = await service.list('t1', userA);
    expect(resA.map((r) => [r.name, r.personal])).toEqual([
      ['A-privat', true],
      ['Gemeinsam', false],
    ]);
    const resB: any[] = await service.list('t1', userB);
    expect(resB.map((r) => r.name)).toEqual(['B-privat', 'Gemeinsam']);
  });

  it('list sieht auch als Administrator keine persoenlichen Eintraege anderer', async () => {
    const { service } = setup();
    await service.create('t1', userA, { ...dto, name: 'A-privat' });
    await service.create('t1', admin, { ...dto, name: 'Gemeinsam', shared: true });
    const res: any[] = await service.list('t1', admin);
    expect(res.map((r) => r.name)).toEqual(['Gemeinsam']);
  });

  it('list liefert nur Zeilen des Mandanten, nach Name sortiert', async () => {
    const { prisma, service } = setup();
    await service.create('t1', admin, { ...dto, name: 'Zebra', shared: true });
    await service.create('t1', admin, { ...dto, name: 'Anker', shared: true });
    await service.create('t2', admin, { ...dto, name: 'Fremd', shared: true });
    const result: any[] = await service.list('t1', userA);
    expect(result.map((r) => r.name)).toEqual(['Anker', 'Zebra']);
    expect(prisma.customModule.findMany.mock.calls[0]?.[0]?.where).toEqual({
      tenantId: 't1',
      OR: [{ ownerUserId: null }, { ownerUserId: 'ua' }],
    });
  });

  it('getOne liefert einen gemeinsamen Eintrag jedem, ohne tenantId und ownerUserId', async () => {
    const { service } = setup();
    const created: any = await service.create('t1', admin, { ...dto, shared: true });
    const row: any = await service.getOne('t1', userA, created.id);
    expect(row.name).toBe('Wiki');
    expect(row.personal).toBe(false);
    expect(row).not.toHaveProperty('tenantId');
    expect(row).not.toHaveProperty('ownerUserId');
  });

  it('getOne liefert einen eigenen persoenlichen Eintrag', async () => {
    const { service } = setup();
    const created: any = await service.create('t1', userA, dto);
    const row: any = await service.getOne('t1', userA, created.id);
    expect(row.personal).toBe(true);
  });

  it('getOne auf den persoenlichen Eintrag eines anderen -> NotFoundException (auch fuer Administratoren)', async () => {
    const { service } = setup();
    const created: any = await service.create('t1', userA, dto);
    await expect(service.getOne('t1', userB, created.id)).rejects.toBeInstanceOf(NotFoundException);
    await expect(service.getOne('t1', admin, created.id)).rejects.toBeInstanceOf(NotFoundException);
  });

  it('getOne/update/remove mit unbekannter id -> NotFoundException', async () => {
    const { service } = setup();
    await expect(service.getOne('t1', userA, 'nope')).rejects.toBeInstanceOf(NotFoundException);
    await expect(service.update('t1', userA, 'nope', { name: 'x' })).rejects.toBeInstanceOf(
      NotFoundException,
    );
    await expect(service.remove('t1', userA, 'nope')).rejects.toBeInstanceOf(NotFoundException);
  });

  it('getOne/update/remove mit Zeile eines anderen Mandanten -> NotFoundException', async () => {
    const { prisma, service } = setup();
    const created: any = await service.create('t2', admin, { ...dto, shared: true });
    await expect(service.getOne('t1', admin, created.id)).rejects.toBeInstanceOf(NotFoundException);
    await expect(service.update('t1', admin, created.id, { name: 'x' })).rejects.toBeInstanceOf(
      NotFoundException,
    );
    await expect(service.remove('t1', admin, created.id)).rejects.toBeInstanceOf(NotFoundException);
    expect(prisma.customModule.update).not.toHaveBeenCalled();
    expect(prisma.customModule.delete).not.toHaveBeenCalled();
  });
});

describe('CustomModulesService — aendern und loeschen', () => {
  it('der Besitzer aendert und loescht seinen persoenlichen Eintrag', async () => {
    const { prisma, service } = setup();
    const created: any = await service.create('t1', userA, dto);
    const updated: any = await service.update('t1', userA, created.id, { name: 'Neu' });
    expect(updated.name).toBe('Neu');
    expect(updated.personal).toBe(true);
    await expect(service.remove('t1', userA, created.id)).resolves.toEqual({ deleted: true });
    expect(prisma.rows.size).toBe(0);
  });

  it('ein anderer Benutzer kann den persoenlichen Eintrag weder aendern noch loeschen (404)', async () => {
    const { prisma, service } = setup();
    const created: any = await service.create('t1', userA, dto);
    await expect(service.update('t1', userB, created.id, { name: 'x' })).rejects.toBeInstanceOf(
      NotFoundException,
    );
    await expect(service.remove('t1', userB, created.id)).rejects.toBeInstanceOf(NotFoundException);
    expect(prisma.customModule.update).not.toHaveBeenCalled();
    expect(prisma.customModule.delete).not.toHaveBeenCalled();
  });

  it('auch ein Administrator kann den persoenlichen Eintrag eines Benutzers nicht aendern (404)', async () => {
    const { prisma, service } = setup();
    const created: any = await service.create('t1', userA, dto);
    await expect(service.update('t1', admin, created.id, { name: 'x' })).rejects.toBeInstanceOf(
      NotFoundException,
    );
    await expect(service.remove('t1', admin, created.id)).rejects.toBeInstanceOf(NotFoundException);
    expect(prisma.rows.size).toBe(1);
  });

  it('ein normaler Benutzer kann einen gemeinsamen Eintrag weder aendern noch loeschen (403)', async () => {
    const { prisma, service } = setup();
    const created: any = await service.create('t1', admin, { ...dto, shared: true });
    await expect(service.update('t1', userA, created.id, { name: 'x' })).rejects.toBeInstanceOf(
      ForbiddenException,
    );
    await expect(service.remove('t1', userA, created.id)).rejects.toBeInstanceOf(
      ForbiddenException,
    );
    expect(prisma.customModule.update).not.toHaveBeenCalled();
    expect(prisma.customModule.delete).not.toHaveBeenCalled();
  });

  it('ein Administrator aendert und loescht einen gemeinsamen Eintrag', async () => {
    const { prisma, service } = setup();
    const created: any = await service.create('t1', admin, { ...dto, shared: true });
    const updated: any = await service.update('t1', admin, created.id, { name: 'Neu' });
    expect(updated.name).toBe('Neu');
    expect(updated.personal).toBe(false);
    await expect(service.remove('t1', admin, created.id)).resolves.toEqual({ deleted: true });
    expect(prisma.rows.size).toBe(0);
  });

  it('update aendert nur gesetzte Felder und nie Besitz oder Gemeinsamkeit', async () => {
    const { prisma, service } = setup();
    const created: any = await service.create('t1', userA, dto);
    await service.update('t1', userA, created.id, {
      name: 'Neu',
      shared: true,
      ownerUserId: 'ub',
    } as any);
    expect(prisma.customModule.update.mock.calls[0][0].data).toEqual({ name: 'Neu' });
  });
});

describe('CustomModulesService — RLS-Bindung', () => {
  it('bindet persoenliche Zugriffe mit Benutzer, gemeinsame Schreibzugriffe ohne', async () => {
    const { prisma, service } = setup();
    vi.mocked(forTenant).mockClear();
    const shared: any = await service.create('t1', admin, { ...dto, shared: true });
    const mine: any = await service.create('t1', userA, dto);
    await service.list('t1', userA);
    await service.getOne('t1', userA, mine.id);
    await service.update('t1', userA, mine.id, { name: 'a' });
    await service.update('t1', admin, shared.id, { name: 'b' });
    const calls = vi.mocked(forTenant).mock.calls;
    // create shared: ohne Benutzer
    expect(calls[0]).toEqual([prisma, 't1']);
    // create personal + list + getOne + (update personal: Laden + Schreiben)
    expect(calls[1]).toEqual([prisma, 't1', 'ua']);
    expect(calls[2]).toEqual([prisma, 't1', 'ua']);
    expect(calls[3]).toEqual([prisma, 't1', 'ua']);
    // update shared als Admin: Laden mit Benutzer, Schreiben ohne
    expect(calls[calls.length - 2]).toEqual([prisma, 't1', 'admin1']);
    expect(calls[calls.length - 1]).toEqual([prisma, 't1']);
  });
});