/**
 * Global Blocks API Tests – CRUD for folders and blocks
 */
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('Global Blocks API', () => {
  let app: FastifyInstance;
  let db: SqliteAdapter;
  let authToken: string;
  let createdFolderId: string;
  let subFolderId: string;
  let createdBlockId: 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: 'global-test@example.com', password: 'Password123!', name: 'Global Test', role: 'admin' },
    });
    authToken = JSON.parse(regRes.body).session.token;
  });

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

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

  describe('Authentication', () => {
    it('should return 401 without authorization header for folders', async () => {
      const response = await app.inject({
        method: 'GET',
        url: '/api/global-folders',
      });
      expect(response.statusCode).toBe(401);
    });

    it('should return 401 without authorization header for blocks', async () => {
      const response = await app.inject({
        method: 'GET',
        url: '/api/global-blocks',
      });
      expect(response.statusCode).toBe(401);
    });
  });

  // ─── Folder CRUD ─────────────────────────────────────

  describe('POST /api/global-folders', () => {
    it('should create a root folder with 201', async () => {
      const response = await app.inject({
        method: 'POST',
        url: '/api/global-folders',
        headers: { authorization: `Bearer ${authToken}` },
        payload: { name: 'Möbel' },
      });
      expect(response.statusCode).toBe(201);
      const body = JSON.parse(response.body);
      expect(body.id).toBeDefined();
      expect(body.name).toBe('Möbel');
      expect(body.parent_id).toBeNull();
      createdFolderId = body.id;
    });

    it('should create a sub-folder with parent_id', async () => {
      const response = await app.inject({
        method: 'POST',
        url: '/api/global-folders',
        headers: { authorization: `Bearer ${authToken}` },
        payload: { name: 'Stühle', parent_id: createdFolderId },
      });
      expect(response.statusCode).toBe(201);
      const body = JSON.parse(response.body);
      expect(body.name).toBe('Stühle');
      expect(body.parent_id).toBe(createdFolderId);
      subFolderId = body.id;
    });

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

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

  describe('GET /api/global-folders', () => {
    it('should list all folders', async () => {
      const response = await app.inject({
        method: 'GET',
        url: '/api/global-folders',
        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 list root folders (parentId=null)', async () => {
      const response = await app.inject({
        method: 'GET',
        url: '/api/global-folders?parentId=null',
        headers: { authorization: `Bearer ${authToken}` },
      });
      expect(response.statusCode).toBe(200);
      const body = JSON.parse(response.body);
      expect(Array.isArray(body)).toBe(true);
      expect(body.every((f: { parent_id: string | null }) => f.parent_id === null)).toBe(true);
    });

    it('should list sub-folders for a parent', async () => {
      const response = await app.inject({
        method: 'GET',
        url: `/api/global-folders?parentId=${createdFolderId}`,
        headers: { authorization: `Bearer ${authToken}` },
      });
      expect(response.statusCode).toBe(200);
      const body = JSON.parse(response.body);
      expect(body.length).toBeGreaterThanOrEqual(1);
      expect(body[0].parent_id).toBe(createdFolderId);
    });
  });

  describe('PATCH /api/global-folders/:id', () => {
    it('should rename a folder', async () => {
      const response = await app.inject({
        method: 'PATCH',
        url: `/api/global-folders/${createdFolderId}`,
        headers: { authorization: `Bearer ${authToken}` },
        payload: { name: 'Möbel & Ausstattung' },
      });
      expect(response.statusCode).toBe(200);
      const body = JSON.parse(response.body);
      expect(body.name).toBe('Möbel & Ausstattung');
    });

    it('should reject setting parent to self with 400', async () => {
      const response = await app.inject({
        method: 'PATCH',
        url: `/api/global-folders/${createdFolderId}`,
        headers: { authorization: `Bearer ${authToken}` },
        payload: { parent_id: createdFolderId },
      });
      expect(response.statusCode).toBe(400);
    });

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

  // ─── Block CRUD ──────────────────────────────────────

  describe('POST /api/global-blocks', () => {
    it('should create a global block in a folder with 201', async () => {
      const response = await app.inject({
        method: 'POST',
        url: '/api/global-blocks',
        headers: { authorization: `Bearer ${authToken}` },
        payload: {
          name: 'Konferenzstuhl',
          folder_id: subFolderId,
          block_data: JSON.stringify({ type: 'chair', width: 50, height: 50 }),
          svg_data: '<svg><rect width="50" height="50"/></svg>',
        },
      });
      expect(response.statusCode).toBe(201);
      const body = JSON.parse(response.body);
      expect(body.id).toBeDefined();
      expect(body.name).toBe('Konferenzstuhl');
      expect(body.folder_id).toBe(subFolderId);
      expect(body.block_data).toContain('chair');
      expect(body.svg_data).toContain('<svg>');
      createdBlockId = body.id;
    });

    it('should create a global block without folder (root level)', async () => {
      const response = await app.inject({
        method: 'POST',
        url: '/api/global-blocks',
        headers: { authorization: `Bearer ${authToken}` },
        payload: { name: 'Root Block' },
      });
      expect(response.statusCode).toBe(201);
      const body = JSON.parse(response.body);
      expect(body.folder_id).toBeNull();
      expect(body.block_data).toBe('{}');
    });

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

    it('should reject non-string block_data with 400', async () => {
      const response = await app.inject({
        method: 'POST',
        url: '/api/global-blocks',
        headers: { authorization: `Bearer ${authToken}` },
        payload: { name: 'Bad Block', block_data: { not: 'a string' } },
      });
      expect(response.statusCode).toBe(400);
      expect(JSON.parse(response.body).error).toContain('block_data must be a JSON string');
    });
  });

  describe('GET /api/global-blocks', () => {
    it('should list all global blocks', async () => {
      const response = await app.inject({
        method: 'GET',
        url: '/api/global-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 list blocks for a specific folder', async () => {
      const response = await app.inject({
        method: 'GET',
        url: `/api/global-blocks?folderId=${subFolderId}`,
        headers: { authorization: `Bearer ${authToken}` },
      });
      expect(response.statusCode).toBe(200);
      const body = JSON.parse(response.body);
      expect(body.length).toBeGreaterThanOrEqual(1);
      expect(body.every((b: { folder_id: string | null }) => b.folder_id === subFolderId)).toBe(true);
    });

    it('should list root-level blocks (folderId=null)', async () => {
      const response = await app.inject({
        method: 'GET',
        url: '/api/global-blocks?folderId=null',
        headers: { authorization: `Bearer ${authToken}` },
      });
      expect(response.statusCode).toBe(200);
      const body = JSON.parse(response.body);
      expect(body.every((b: { folder_id: string | null }) => b.folder_id === null)).toBe(true);
    });
  });

  describe('GET /api/global-blocks/:id', () => {
    it('should get a single global block', async () => {
      const response = await app.inject({
        method: 'GET',
        url: `/api/global-blocks/${createdBlockId}`,
        headers: { authorization: `Bearer ${authToken}` },
      });
      expect(response.statusCode).toBe(200);
      const body = JSON.parse(response.body);
      expect(body.id).toBe(createdBlockId);
      expect(body.name).toBe('Konferenzstuhl');
    });

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

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

    it('should move a block to a different folder', async () => {
      const response = await app.inject({
        method: 'PATCH',
        url: `/api/global-blocks/${createdBlockId}`,
        headers: { authorization: `Bearer ${authToken}` },
        payload: { folder_id: createdFolderId },
      });
      expect(response.statusCode).toBe(200);
      const body = JSON.parse(response.body);
      expect(body.folder_id).toBe(createdFolderId);
    });

    it('should update block_data', async () => {
      const response = await app.inject({
        method: 'PATCH',
        url: `/api/global-blocks/${createdBlockId}`,
        headers: { authorization: `Bearer ${authToken}` },
        payload: { block_data: JSON.stringify({ type: 'updated', width: 60 }) },
      });
      expect(response.statusCode).toBe(200);
      const body = JSON.parse(response.body);
      expect(body.block_data).toContain('updated');
    });

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

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

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

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

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

  describe('DELETE /api/global-folders/:id', () => {
    it('should delete a folder and cascade to sub-folders', async () => {
      const createRes = await app.inject({
        method: 'POST',
        url: '/api/global-folders',
        headers: { authorization: `Bearer ${authToken}` },
        payload: { name: 'Temp Folder' },
      });
      const folderId = JSON.parse(createRes.body).id;

      const subRes = await app.inject({
        method: 'POST',
        url: '/api/global-folders',
        headers: { authorization: `Bearer ${authToken}` },
        payload: { name: 'Temp Sub', parent_id: folderId },
      });
      const subId = JSON.parse(subRes.body).id;

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

      // Sub-folder should be gone (cascade)
      const checkSub = await app.inject({
        method: 'GET',
        url: `/api/global-folders/${subId}`,
        headers: { authorization: `Bearer ${authToken}` },
      });
      expect(checkSub.statusCode).toBe(404);
    });

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