# Setup Windows Task Scheduler pentru Incremental Backup și Transfer
# Rulează ca Administrator!

if (-not ([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
    Write-Error "This script must be run as Administrator!"
    exit 1
}

Write-Host "Setting up Oracle INCREMENTAL backup tasks..." -ForegroundColor Cyan

# ==================== TASK 1: Incremental RMAN Backup ====================

$taskName1 = "Oracle_IncrementalBackup"
$rmanScriptPath = "D:\rman_backup\rman_backup_incremental.bat"

# Creează BAT wrapper pentru RMAN incremental
$batContent = @"
@echo off
REM Incremental RMAN Backup - Midday
echo [%DATE% %TIME%] Starting incremental backup...
rman target sys/romfastsoft@roa @'D:\RMAN_BACKUP\rman_backup_incremental.txt'
echo [%DATE% %TIME%] Incremental backup completed
"@

New-Item -ItemType Directory -Force -Path "D:\rman_backup" | Out-Null
$batContent | Out-File -FilePath $rmanScriptPath -Encoding ASCII -Force

# Verificare că scriptul RMAN incremental există
$rmanIncrScript = "D:\rman_backup\rman_backup_incremental.txt"
if (-not (Test-Path $rmanIncrScript)) {
    Write-Host "⚠️  RMAN incremental script not found at: $rmanIncrScript" -ForegroundColor Yellow
    Write-Host "Please copy 01b_rman_backup_incremental.txt to D:\rman_backup\rman_backup_incremental.txt" -ForegroundColor Yellow
    Write-Host "Continuing with task creation..." -ForegroundColor Yellow
}

# Task action pentru incremental backup
$action1 = New-ScheduledTaskAction `
    -Execute "cmd.exe" `
    -Argument "/c `"$rmanScriptPath`""

# Trigger: zilnic la 14:00 (mijlocul zilei - după pauza de masă)
$trigger1 = New-ScheduledTaskTrigger -Daily -At "14:00"

# Principal: SYSTEM account
$principal = New-ScheduledTaskPrincipal `
    -UserId "SYSTEM" `
    -LogonType ServiceAccount `
    -RunLevel Highest

# Settings
$settings = New-ScheduledTaskSettingsSet `
    -AllowStartIfOnBatteries `
    -DontStopIfGoingOnBatteries `
    -StartWhenAvailable `
    -RestartCount 3 `
    -RestartInterval (New-TimeSpan -Minutes 5)

# Șterge task vechi dacă există
$existingTask1 = Get-ScheduledTask -TaskName $taskName1 -ErrorAction SilentlyContinue
if ($existingTask1) {
    Write-Host "Removing existing task: $taskName1" -ForegroundColor Yellow
    Unregister-ScheduledTask -TaskName $taskName1 -Confirm:$false
}

# Creare task incremental backup
try {
    Register-ScheduledTask `
        -TaskName $taskName1 `
        -Action $action1 `
        -Trigger $trigger1 `
        -Principal $principal `
        -Settings $settings `
        -Description "Oracle - Incremental RMAN backup daily at 14:00 (midday)" `
        -ErrorAction Stop

    Write-Host "✅ Task created: $taskName1" -ForegroundColor Green
} catch {
    Write-Error "Failed to create task $taskName1 : $_"
    exit 1
}

# ==================== TASK 2: Transfer Incremental to DR ====================

$taskName2 = "Oracle_DR_TransferIncremental"
$transferScriptPath = "D:\rman_backup\transfer_incremental_to_dr.ps1"

# Verificare că scriptul de transfer există
if (-not (Test-Path $transferScriptPath)) {
    Write-Host "⚠️  Transfer script not found at: $transferScriptPath" -ForegroundColor Yellow
    Write-Host "Please copy 02b_transfer_incremental_to_dr.ps1 to D:\rman_backup\" -ForegroundColor Yellow
}

# Task action pentru transfer incremental
$action2 = New-ScheduledTaskAction `
    -Execute "PowerShell.exe" `
    -Argument "-ExecutionPolicy Bypass -NoProfile -File `"$transferScriptPath`""

# Trigger: zilnic la 14:30 (30 min după incremental backup)
$trigger2 = New-ScheduledTaskTrigger -Daily -At "14:30"

# Șterge task vechi
$existingTask2 = Get-ScheduledTask -TaskName $taskName2 -ErrorAction SilentlyContinue
if ($existingTask2) {
    Write-Host "Removing existing task: $taskName2" -ForegroundColor Yellow
    Unregister-ScheduledTask -TaskName $taskName2 -Confirm:$false
}

# Creare task transfer incremental
try {
    Register-ScheduledTask `
        -TaskName $taskName2 `
        -Action $action2 `
        -Trigger $trigger2 `
        -Principal $principal `
        -Settings $settings `
        -Description "Oracle DR - Transfer incremental backups to DR server daily at 14:30" `
        -ErrorAction Stop

    Write-Host "✅ Task created: $taskName2" -ForegroundColor Green
} catch {
    Write-Error "Failed to create task $taskName2 : $_"
    exit 1
}

# ==================== SUMMARY ====================

Write-Host "`n=========================================" -ForegroundColor Green
Write-Host "Incremental Backup Tasks Setup Complete!" -ForegroundColor Green
Write-Host "=========================================" -ForegroundColor Green

Write-Host "`nTasks created:"
Write-Host "  1. $taskName1"
Write-Host "     Schedule: Daily at 14:00"
Write-Host "     Action:   RMAN incremental backup"
Write-Host ""
Write-Host "  2. $taskName2"
Write-Host "     Schedule: Daily at 14:30"
Write-Host "     Action:   Transfer to DR server"

Write-Host "`nDaily timeline:"
Write-Host "  02:00 → Full backup (existent)"
Write-Host "  03:00 → Transfer full to DR (existent)"
Write-Host "  14:00 → Incremental backup (NOU!)"
Write-Host "  14:30 → Transfer incremental to DR (NOU!)"
Write-Host "  21:00 → Copy to E:\ external HDD (existent)"

Write-Host "`n⚠️  IMPORTANT - Files needed:" -ForegroundColor Yellow
Write-Host "  1. Copy 01b_rman_backup_incremental.txt → D:\rman_backup\rman_backup_incremental.txt"
Write-Host "  2. Copy 02b_transfer_incremental_to_dr.ps1 → D:\rman_backup\transfer_incremental_to_dr.ps1"

Write-Host "`nVerify tasks:"
Write-Host "  Get-ScheduledTask | Where-Object { `$_.TaskName -like 'Oracle*' }"

Write-Host "`nTest manual:"
Write-Host "  Start-ScheduledTask -TaskName '$taskName1'"
Write-Host "  Start-ScheduledTask -TaskName '$taskName2'"

Write-Host "`n=========================================" -ForegroundColor Green