import { Hono } from 'hono';
import { describe, expect, it } from 'vitest';
import { z } from 'zod';
import { dec, parseBody, parseListQuery } from '../../src/lib/http.js';
import { errorHandler } from '../../src/middleware/error-handler.js';

describe('parseListQuery', () => {
  it('extrait page/per_page/sort/filter', async () => {
    const app = new Hono();
    app.get('/', (c) => {
      const q = parseListQuery(c);
      return c.json(q);
    });
    const res = await app.request('/?page=2&per_page=20&sort=-name&filter[statut]=actif');
    const body = (await res.json()) as {
      page: number;
      per_page: number;
      sort: string;
      filter: Record<string, string>;
    };
    expect(body.page).toBe(2);
    expect(body.per_page).toBe(20);
    expect(body.sort).toBe('-name');
    expect(body.filter.statut).toBe('actif');
  });

  it('clamp per_page entre 1 et 200', async () => {
    const app = new Hono();
    app.get('/', (c) => c.json(parseListQuery(c)));

    const r1 = await app.request('/?per_page=500');
    const b1 = (await r1.json()) as { per_page: number };
    expect(b1.per_page).toBe(200);

    const r2 = await app.request('/?per_page=0');
    const b2 = (await r2.json()) as { per_page: number };
    // 0 -> default fallback 50
    expect(b2.per_page).toBeGreaterThanOrEqual(1);
  });

  it('defaults page=1 per_page=50', async () => {
    const app = new Hono();
    app.get('/', (c) => c.json(parseListQuery(c)));
    const res = await app.request('/');
    const body = (await res.json()) as { page: number; per_page: number };
    expect(body.page).toBe(1);
    expect(body.per_page).toBe(50);
  });
});

describe('dec', () => {
  it('toFixed 2 sur Decimal', async () => {
    const { Decimal } = await import('decimal.js');
    expect(dec(new Decimal('40.123'))).toBe('40.12');
    expect(dec(new Decimal(0))).toBe('0.00');
  });
  it('null/undefined -> "0"', () => {
    expect(dec(null)).toBe('0');
    expect(dec(undefined)).toBe('0');
  });
});

describe('parseBody', () => {
  it('valide via schema', async () => {
    const app = new Hono();
    app.onError(errorHandler);
    app.post('/', async (c) => {
      const body = await parseBody(c, z.object({ a: z.number() }));
      return c.json(body);
    });
    const res = await app.request('/', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ a: 1 }),
    });
    expect(res.status).toBe(200);
  });

  it('400 si body pas JSON', async () => {
    const app = new Hono();
    app.onError(errorHandler);
    app.post('/', async (c) => {
      await parseBody(c, z.object({}));
      return c.json({});
    });
    const res = await app.request('/', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: 'not-json',
    });
    expect(res.status).toBe(400);
  });

  it('400 si schema mismatch', async () => {
    const app = new Hono();
    app.onError(errorHandler);
    app.post('/', async (c) => {
      await parseBody(c, z.object({ a: z.number() }));
      return c.json({});
    });
    const res = await app.request('/', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ a: 'not-a-number' }),
    });
    expect(res.status).toBe(400);
  });
});