$ErrorActionPreference = "Stop"

$reportDir = Join-Path $PSScriptRoot "reports"
$htmlReport = Join-Path $reportDir "backend-performance-report.html"
$csvPrefix = Join-Path $reportDir "backend-performance"
$pendingFile = Join-Path $reportDir "backend_performance_pending.txt"

New-Item -ItemType Directory -Path $reportDir -Force | Out-Null

$locust = Get-Command locust -ErrorAction SilentlyContinue
if ($null -eq $locust) {
  @(
    "ServicePilot 后端性能测试未执行",
    "原因：当前环境未安装 Locust 命令。",
    "安装命令：pip install -r requirements.txt",
    "执行命令：powershell -ExecutionPolicy Bypass -File .\run_backend_performance.ps1",
    "预期输出：reports/backend-performance-report.html 与 reports/backend-performance_*.csv"
  ) | Set-Content -Path $pendingFile -Encoding UTF8
  Write-Host "Locust 未安装，已生成待执行说明：$pendingFile"
  exit 1
}

& $locust.Source -f "$PSScriptRoot\locustfile_backend.py" `
  --host "http://localhost:3000" `
  --headless `
  -u 30 `
  -r 5 `
  -t 3m `
  --html "$htmlReport" `
  --csv "$csvPrefix"