# 简化的 Excel 读取脚本
$envPath = "c:\work\data\env.xlsx"

Write-Output "读取 Excel 文件..."

$bytes = [System.IO.File]::ReadAllBytes($envPath)

# 转换为多种编码尝试
Write-Output "`n尝试 UTF-8 编码:"
try {
  $text = [System.Text.Encoding]::UTF8.GetString($bytes)
  # 查找 GitHub/Git 相关信息
  $githubUrls = [regex]::Matches($text, "https://github\.com/[a-zA-Z0-9_.-]+/[a-zA-Z0-9_.-]+")
  if ($githubUrls.Count -gt 0) {
    Write-Output "找到的 GitHub URLs:"
    $githubUrls | ForEach-Object { Write-Output "  $($_.Value)" }
  } else {
    Write-Output "未找到 GitHub URLs"
  }
} catch {
  Write-Output "UTF-8 解码失败"
}

Write-Output "`n尝试 ASCII 编码:"
try {
  $text = [System.Text.Encoding]::ASCII.GetString($bytes)
  $githubUrls = [regex]::Matches($text, "https://github\.com/[a-zA-Z0-9_.-]+")
  if ($githubUrls.Count -gt 0) {
    Write-Output "找到的 GitHub URLs:"
    $githubUrls | ForEach-Object { Write-Output "  $($_.Value)" }
  } else {
    Write-Output "未找到 GitHub URLs"
  }
} catch {
  Write-Output "ASCII 解码失败"
}

Write-Output "`n查找 Git 相关关键词:"
$bytesText = [System.Text.Encoding]::ASCII.GetString($bytes)
$keywords = @("git", "github", "repository", "repo", "clone", "push", "remote", "origin")

foreach ($keyword in $keywords) {
  $index = $bytesText.IndexOf($keyword)
  if ($index -gt 0) {
    $context = $bytesText.Substring([Math]::Max(0, $index-30), [Math]::Min($bytesText.Length, $index+50))
    Write-Output "找到 '$keyword' - 上下文: $context..."
  }
}

Write-Output "`n文件信息:"
$file = Get-Item $envPath
Write-Output "  大小: $($file.Length) bytes"
Write-Output "  修改时间: $($file.LastWriteTime)"
Write-Output "  类型: $($file.Extension)"

# 尝试读取为 CSV/文本格式
Write-Output "`n读取为 CSV 格式（如果可能）:"
try {
  $csv = Import-Csv $envPath -Encoding UTF8 -ErrorAction SilentlyContinue
  if ($csv) {
    Write-Output "CSV 列名: $($csv | Get-Member -MemberType NoteProperty | Select-Object -ExpandProperty Name)"
    Write-Output "前 5 行:"
    $csv | Select-Object -First 5 | Format-Table -AutoSize
  }
} catch {
  Write-Output "CSV 读取失败"
}