/**
 * Blocks API Tests – CRUD (List / Create / Update / Delete)
 */
import { describe, it, expect, beforeAll, afterAll } from 'vitest';
import type { FastifyInstance } from 'fastify';
import { SqliteAdapter } from '../src/database/SqliteAdapter.js';
import { createServer } from '../src/server.js';

describe('Blocks API', () => {
  let app: FastifyInstance;
  let db: SqliteAdapter;
  let drawingId: string;
  let createdBlockId: string;
  let authToken: string;

  beforeAll(async () => {
    db = new SqliteAdapter(':memory:');
    await db.init();
    app = await createServer({ db, port: 0 });
    await app.ready();

    const regRes = await app.inject({
      method: 'POST',
      url: '/api/auth/register',
      payload: { email: 'admin-test@example.com', password: 'Password123!', name: 'Admin Test', role: 'admin' },
    });
    authToken = JSON.parse(regRes.body).session.token;

    // Create project → drawing hierarchy
    const projRes = await app.inject({
      method: 'POST',
      url: '/api/projects',
      headers: { authorization: `Bearer ${authToken}` },
      payload: { name: 'Blocks Test Project' },
    });
    const projectId = JSON.parse(projRes.body).id;

    const drawRes = await app.inject({
      method: 'POST',
      url: `/api/projects/${projectId}/drawings`,
      headers: { authorization: `Bearer ${authToken}` },
      payload: { name: 'Blocks Test Drawing' },
    });
    drawingId = JSON.parse(drawRes.body).id;
  });

  afterAll(async () => {
    await app.close();
    db.close();
  });

  // ─── Auth Check ──────────────────────────────────────

  describe('Authentication', () => {
    it('should return 401 without authorization header', async () => {
      const response = await app.inject({
        method: 'GET',
        url: `/api/drawings/${drawingId}/blocks`,
      });
      expect(response.statusCode).toBe(401);
    });
  });

  // ─── Create ─────────────────────────────────────────

  describe('POST /api/drawings/:drawingId/blocks', () => {
    it('should create a block with 201', async () => {
      const response = await app.inject({
        method: 'POST',
        url: `/api/drawings/${drawingId}/blocks`,
        headers: { authorization: `Bearer ${authToken}` },
        payload: { name: 'Standard Table', category: 'Mobiliar', description: 'A standard round table' },
      });
      expect(response.statusCode).toBe(201);
      const body = JSON.parse(response.body);
      expect(body.id).toBeDefined();
      expect(body.name).toBe('Standard Table');
      expect(body.category).toBe('Mobiliar');
      expect(body.description).toBe('A standard round table');
      expect(body.drawing_id).toBe(drawingId);
      createdBlockId = body.id;
    });

    it('should create a block with default values', async () => {
      const response = await app.inject({
        method: 'POST',
        url: `/api/drawings/${drawingId}/blocks`,
        headers: { authorization: `Bearer ${authToken}` },
        payload: { name: 'Minimal Block' },
      });
      expect(response.statusCode).toBe(201);
      const body = JSON.parse(response.body);
      expect(body.name).toBe('Minimal Block');
      expect(body.category).toBe('Allgemein');
      expect(body.description).toBeNull();
      expect(body.elements_json).toBe('[]');
    });

    it('should reject block without name with 400', async () => {
      const response = await app.inject({
        method: 'POST',
        url: `/api/drawings/${drawingId}/blocks`,
        headers: { authorization: `Bearer ${authToken}` },
        payload: { category: 'Test' },
      });
      expect(response.statusCode).toBe(400);
      const body = JSON.parse(response.body);
      expect(body.error).toContain('Name is required');
    });

    it('should reject block with empty name with 400', async () => {
      const response = await app.inject({
        method: 'POST',
        url: `/api/drawings/${drawingId}/blocks`,
        headers: { authorization: `Bearer ${authToken}` },
        payload: { name: '' },
      });
      expect(response.statusCode).toBe(400);
    });
  });

  // ─── List ───────────────────────────────────────────

  describe('GET /api/drawings/:drawingId/blocks', () => {
    it('should list blocks for a drawing', async () => {
      const response = await app.inject({
        method: 'GET',
        url: `/api/drawings/${drawingId}/blocks`,
        headers: { authorization: `Bearer ${authToken}` },
      });
      expect(response.statusCode).toBe(200);
      const body = JSON.parse(response.body);
      expect(Array.isArray(body)).toBe(true);
      expect(body.length).toBeGreaterThanOrEqual(2);
    });

    it('should return empty array for drawing with no blocks', async () => {
      const projRes = await app.inject({
        method: 'POST',
        url: '/api/projects',
        headers: { authorization: `Bearer ${authToken}` },
        payload: { name: 'Empty Blocks Project' },
      });
      const projId = JSON.parse(projRes.body).id;
      const drawRes = await app.inject({
        method: 'POST',
        url: `/api/projects/${projId}/drawings`,
        headers: { authorization: `Bearer ${authToken}` },
        payload: { name: 'Empty Drawing' },
      });
      const emptyDrawId = JSON.parse(drawRes.body).id;

      const response = await app.inject({
        method: 'GET',
        url: `/api/drawings/${emptyDrawId}/blocks`,
        headers: { authorization: `Bearer ${authToken}` },
      });
      expect(response.statusCode).toBe(200);
      const body = JSON.parse(response.body);
      expect(Array.isArray(body)).toBe(true);
      expect(body.length).toBe(0);
    });
  });

  // ─── Update ─────────────────────────────────────────

  describe('PATCH /api/blocks/:id', () => {
    it('should update block name', async () => {
      const response = await app.inject({
        method: 'PATCH',
        url: `/api/blocks/${createdBlockId}`,
        headers: { authorization: `Bearer ${authToken}` },
        payload: { name: 'Updated Block Name' },
      });
      expect(response.statusCode).toBe(200);
      const body = JSON.parse(response.body);
      expect(body.name).toBe('Updated Block Name');
    });

    it('should update block category and description', async () => {
      const response = await app.inject({
        method: 'PATCH',
        url: `/api/blocks/${createdBlockId}`,
        headers: { authorization: `Bearer ${authToken}` },
        payload: { category: 'Bühne', description: 'Stage equipment' },
      });
      expect(response.statusCode).toBe(200);
      const body = JSON.parse(response.body);
      expect(body.category).toBe('Bühne');
      expect(body.description).toBe('Stage equipment');
    });

    it('should update block elements_json', async () => {
      const response = await app.inject({
        method: 'PATCH',
        url: `/api/blocks/${createdBlockId}`,
        headers: { authorization: `Bearer ${authToken}` },
        payload: { elements_json: '[{"type":"rect"}]' },
      });
      expect(response.statusCode).toBe(200);
      const body = JSON.parse(response.body);
      expect(body.elements_json).toBe('[{"type":"rect"}]');
    });

    it('should return 404 for non-existent block update', async () => {
      const response = await app.inject({
        method: 'PATCH',
        url: '/api/blocks/non-existent-id',
        headers: { authorization: `Bearer ${authToken}` },
        payload: { name: 'New Name' },
      });
      expect(response.statusCode).toBe(404);
    });
  });

  // ─── Delete ─────────────────────────────────────────

  describe('DELETE /api/blocks/:id', () => {
    it('should delete a block', async () => {
      const createRes = await app.inject({
        method: 'POST',
        url: `/api/drawings/${drawingId}/blocks`,
        headers: { authorization: `Bearer ${authToken}` },
        payload: { name: 'To Be Deleted' },
      });
      const blockId = JSON.parse(createRes.body).id;

      const response = await app.inject({
        method: 'DELETE',
        url: `/api/blocks/${blockId}`,
        headers: { authorization: `Bearer ${authToken}` },
      });
      expect(response.statusCode).toBe(204);

      // Verify it's gone via list
      const listRes = await app.inject({
        method: 'GET',
        url: `/api/drawings/${drawingId}/blocks`,
        headers: { authorization: `Bearer ${authToken}` },
      });
      const blocks = JSON.parse(listRes.body);
      expect(blocks.find((b: any) => b.id === blockId)).toBeUndefined();
    });

    it('should return 404 for non-existent block delete', async () => {
      const response = await app.inject({
        method: 'DELETE',
        url: '/api/blocks/non-existent-id',
        headers: { authorization: `Bearer ${authToken}` },
      });
      expect(response.statusCode).toBe(404);
    });
  });
});