import { describe, it, expect, beforeEach, afterEach } from 'vitest'
import { mkdtempSync, rmSync, existsSync, readFileSync } from 'fs'
import { join } from 'path'
import { tmpdir } from 'os'
import { LogService } from '../../src/main/services/log.service'

describe('LogService', () => {
  let dir: string
  let logs: LogService

  beforeEach(() => {
    dir = mkdtempSync(join(tmpdir(), 'bilin-log-'))
    logs = new LogService(dir)
  })

  afterEach(() => {
    rmSync(dir, { recursive: true, force: true })
  })

  it('UT-LOG-01: manual error writes to log file', () => {
    logs.logManualError('UT-LOG-01 test error')
    const logFile = join(dir, 'logs', 'bilin.log')
    expect(existsSync(logFile)).toBe(true)
    const content = readFileSync(logFile, 'utf-8')
    expect(content).toContain('UT-LOG-01 test error')
  })

  it('detects crash flag from previous run', () => {
    logs.markUncleanExit()
    const next = new LogService(dir)
    expect(next.hadCrashOnLastRun()).toBe(true)
    next.clearCrashFlag()
    expect(next.hadCrashOnLastRun()).toBe(false)
  })
})