# Keep only 5 RBAC tables.
$ErrorActionPreference = "Continue"
$mysql = "C:\yutongda\tools\mysql-8.0.39-winx64\bin\mysql.exe"
$envFile = "E:\wwwroot\.env"
$hostn = "10.206.0.15"
$user = "inquiry_robot"
$pass = $null
$db = "inquiry_robot"
Get-Content $envFile | ForEach-Object {
  if ($_ -match '^MYSQL_HOST=(.+)$') { $hostn = $Matches[1].Trim() }
  if ($_ -match '^MYSQL_USER=(.+)$') { $user = $Matches[1].Trim() }
  if ($_ -match '^MYSQL_PASSWORD=(.+)$') { $pass = $Matches[1].Trim() }
  if ($_ -match '^MYSQL_DB=(.+)$') { $db = $Matches[1].Trim() }
}
if ($db -ne "inquiry_robot") { throw "refuse db=$db" }

$keepSet = New-Object 'System.Collections.Generic.HashSet[string]'
@('sys_user','sys_role','sys_user_role','sys_permission','sys_role_permission') | ForEach-Object { [void]$keepSet.Add($_) }

$tables = & $mysql -h $hostn -P 3306 -u $user "-p$pass" --batch -N $db -e "SHOW TABLES" 2>&1 |
  ForEach-Object {"$_".Trim()} | Where-Object { $_ -ne "" -and $_ -notmatch "Warning" }

$drop = New-Object System.Collections.Generic.List[string]
foreach ($t in $tables) {
  if (-not $keepSet.Contains($t)) { [void]$drop.Add($t) }
}

Write-Output ("before=" + @($tables).Count + " drop=" + $drop.Count)

$sb = New-Object System.Text.StringBuilder
[void]$sb.AppendLine("SET FOREIGN_KEY_CHECKS=0;")
foreach ($t in $drop) { [void]$sb.AppendLine("DROP TABLE IF EXISTS ``$t``;") }
[void]$sb.AppendLine("SET FOREIGN_KEY_CHECKS=1;")
$sqlFile = "E:\wwwroot\ops\sql\_keep_rbac_only.sql"
[System.IO.File]::WriteAllText($sqlFile, $sb.ToString())

& $mysql -h $hostn -P 3306 -u $user "-p$pass" $db -e "source $($sqlFile -replace '\\','/')" 2>&1 |
  Where-Object { $_ -notmatch "Warning|password" } | Out-Null

$left = & $mysql -h $hostn -P 3306 -u $user "-p$pass" --batch -N $db -e "SHOW TABLES" 2>&1 |
  ForEach-Object {"$_".Trim()} | Where-Object { $_ -ne "" -and $_ -notmatch "Warning" }
Write-Output ("after_total=" + @($left).Count)
$left | ForEach-Object { $_ }
Write-Output "RBAC_ONLY_OK"