/**
 * Testes da rota /api/sessions (validação Zod + integração com SessionsDb).
 * @author Descomplicar® | Projecto Observabilidade (Espelho)
 */
import { describe, it, expect, beforeAll } from 'vitest'
import express from 'express'
import request from 'supertest'
import { mkdtempSync } from 'fs'
import { tmpdir } from 'os'
import { join } from 'path'
import { openSessionsDb } from '../services/sessions/db.js'
import { createSessionsRouter } from '../routes/sessions.js'
import type { SessionMeta } from '../types/session.js'

function meta(overrides: Partial<SessionMeta> = {}): SessionMeta {
  return {
    session_id: 's1',
    project_path: '/tmp/p',
    project_slug: 'p',
    jsonl_path: '/tmp/p/s1.jsonl',
    started_at: new Date().toISOString(),
    ended_at: null,
    duration_sec: 60,
    event_count: 10,
    user_messages: 2,
    assistant_msgs: 5,
    tool_calls: 3,
    first_prompt: 'teste',
    tools_used: ['Bash'],
    skills_invoked: [],
    outcome: 'completed',
    permission_mode: 'default',
    file_size: 1000,
    indexed_at: new Date().toISOString(),
    ...overrides,
  }
}

describe('GET /api/sessions', () => {
  let app: express.Express
  beforeAll(() => {
    const dbPath = join(mkdtempSync(join(tmpdir(), 'obs-r-')), 'sessions.db')
    const db = openSessionsDb(dbPath)
    db.upsertSession(meta({ session_id: 's1', project_slug: 'alpha', jsonl_path: '/tmp/p/s1.jsonl' }))
    db.upsertSession(meta({ session_id: 's2', project_slug: 'beta', jsonl_path: '/tmp/p/s2.jsonl' }))
    app = express()
    app.use('/api/sessions', createSessionsRouter(db))
  })

  it('lista todas as sessões por omissão', async () => {
    const res = await request(app).get('/api/sessions')
    expect(res.status).toBe(200)
    expect(res.body.total).toBe(2)
    expect(res.body.items).toHaveLength(2)
  })

  it('filtra por projecto', async () => {
    const res = await request(app).get('/api/sessions').query({ project: 'alpha' })
    expect(res.status).toBe(200)
    expect(res.body.total).toBe(1)
    expect(res.body.items[0].project_slug).toBe('alpha')
  })

  it('rejeita limit inválido', async () => {
    const res = await request(app).get('/api/sessions').query({ limit: '9999' })
    expect(res.status).toBe(400)
  })
})