import { describe, it, expect } from 'vitest'
import { parseSessionMeta } from '../src/http/history.js'

describe('parseSessionMeta', () => {
  it('extracts cwd and the first user prompt (string content)', () => {
    const jsonl = [
      JSON.stringify({ type: 'last-prompt', sessionId: 'x' }),
      JSON.stringify({ type: 'attachment', cwd: '/Users/me/proj', sessionId: 'x' }),
      JSON.stringify({ type: 'user', message: { role: 'user', content: 'Add monitoring please' } }),
    ].join('\n')
    expect(parseSessionMeta(jsonl)).toEqual({ cwd: '/Users/me/proj', preview: 'Add monitoring please' })
  })

  it('reads the first text block when content is an array', () => {
    const jsonl = [
      JSON.stringify({ type: 'user', cwd: '/p', message: { role: 'user', content: [{ type: 'text', text: 'hello there' }] } }),
    ].join('\n')
    expect(parseSessionMeta(jsonl)).toEqual({ cwd: '/p', preview: 'hello there' })
  })

  it('collapses whitespace and truncates long previews to 120 chars', () => {
    const long = 'a'.repeat(200)
    const jsonl = JSON.stringify({ type: 'user', cwd: '/p', message: { role: 'user', content: `line1\n   line2   ${long}` } })
    const { preview } = parseSessionMeta(jsonl)
    expect(preview.length).toBe(120)
    expect(preview.startsWith('line1 line2 ')).toBe(true)
  })

  it('returns nulls/empty when there is no cwd or user message', () => {
    expect(parseSessionMeta('')).toEqual({ cwd: null, preview: '' })
    expect(parseSessionMeta('not json\n{"type":"summary"}')).toEqual({ cwd: null, preview: '' })
  })
})