$ScriptResult = @{
    success = $true
    system_optimization = @{
        "chkdsk" = @{
            "run" = $false
            "success" = $false
            "exit_code" = $null
            "message" = ""
            "reboot_required" = $false
            "diskSpace" = ""
            "errors" = @()
        }
        "sfc" = @{
            "run" = $false
            "success" = $false
            "exit_code" = $null
            "message" = ""
            "files_repaired" = 0
            "errors" = @()
        }
        "dism" = @{
            "run" = $false
            "success" = $false
            "exit_code" = $null
            "message" = ""
            "component_repaired" = $false
            "errors" = @()
        }
    }
}

# Function to run process with live output
function Start-ProcessWithLiveOutput {
    param(
        [string]$FilePath,
        [string]$Arguments,
        [string]$Name
    )
    
    $tempPath = $env:TEMP
    $stdoutFile = "$tempPath\${Name}_stdout.txt"
    $stderrFile = "$tempPath\${Name}_stderr.txt"
    
    # Clean up old files
    if (Test-Path $stdoutFile) { Remove-Item $stdoutFile -ErrorAction SilentlyContinue }
    if (Test-Path $stderrFile) { Remove-Item $stderrFile -ErrorAction SilentlyContinue }
    
    Write-Host "Starting $Name..."
    
    # Start the process
    $process = Start-Process -FilePath $FilePath -ArgumentList $Arguments -NoNewWindow -Wait -PassThru -RedirectStandardOutput $stdoutFile -RedirectStandardError $stderrFile -ErrorAction Stop
    
    # Read and display output live (file is written in real-time)
    if (Test-Path $stdoutFile) {
        $content = Get-Content -Path $stdoutFile -Raw -ErrorAction SilentlyContinue
        if ($content) { Write-Host $content }
    }
    if (Test-Path $stderrFile) {
        $content = Get-Content -Path $stderrFile -Raw -ErrorAction SilentlyContinue
        if ($content) { Write-Host $content }
    }
    
    # Return output and exit code
    $outputText = ""
    if (Test-Path $stdoutFile) { $outputText = Get-Content -Path $stdoutFile -Raw -ErrorAction SilentlyContinue }
    if (Test-Path $stderrFile) { $outputText += Get-Content -Path $stderrFile -Raw -ErrorAction SilentlyContinue }
    
    # Cleanup
    Remove-Item $stdoutFile -ErrorAction SilentlyContinue
    Remove-Item $stderrFile -ErrorAction SilentlyContinue
    
    return @{
        ExitCode = $process.ExitCode
        Output = $outputText
    }
}

# Run CHKDSK
Write-Host "=========================================="
Write-Host "Running CHKDSK with /R option..."
Write-Host "Note: If volume is in use, CHKDSK will be scheduled for next reboot."
Write-Host "=========================================="

try {
    $result = Start-ProcessWithLiveOutput -FilePath "cmd" -Arguments "/c echo Y | chkdsk C: /R" -Name "chkdsk"
    $ChkdskExitCode = $result.ExitCode
    $outputText = $result.Output
    
    $ScriptResult.system_optimization.chkdsk.run = $true
    $ScriptResult.system_optimization.chkdsk.exit_code = $ChkdskExitCode
    
    # Parse output
    if ($outputText -match "will be checked on next boot|Chkdsk cannot run because the volume is in use") {
        $ScriptResult.system_optimization.chkdsk.reboot_required = $true
    }
    
    # Parse disk space
    if ($outputText -match "(\d+) bytes in (\d+) data streams recovered") {
        $bytesRecovered = [int64]$matches[1]
        $ScriptResult.system_optimization.chkdsk.diskSpace = "{0:N2} MB" -f ($bytesRecovered / 1MB)
    }
    
    # Parse exit codes
    switch ($ChkdskExitCode) {
        0 { $ScriptResult.system_optimization.chkdsk.success = $true; $ScriptResult.system_optimization.chkdsk.message = "CHKDSK completed successfully. No errors found." }
        1 { $ScriptResult.system_optimization.chkdsk.success = $true; $ScriptResult.system_optimization.chkdsk.message = "CHKDSK completed successfully. Errors corrected." }
        2 { $ScriptResult.system_optimization.chkdsk.success = $false; $ScriptResult.system_optimization.chkdsk.message = "CHKDSK did not run due to a parameter error." }
        3 { $ScriptResult.system_optimization.chkdsk.success = $true; $ScriptResult.system_optimization.chkdsk.reboot_required = $true; $ScriptResult.system_optimization.chkdsk.message = "CHKDSK completed with errors and requires a reboot to complete." }
        4 { $ScriptResult.system_optimization.chkdsk.success = $false; $ScriptResult.system_optimization.chkdsk.message = "CHKDSK encountered errors but could not fix them." }
        5 { $ScriptResult.system_optimization.chkdsk.success = $false; $ScriptResult.system_optimization.chkdsk.reboot_required = $true; $ScriptResult.system_optimization.chkdsk.message = "CHKDSK found errors but requires a reboot to fix them." }
        default { $ScriptResult.system_optimization.chkdsk.success = $false; $ScriptResult.system_optimization.chkdsk.message = "CHKDSK completed with exit code: $ChkdskExitCode" }
    }
    
    Write-Host "CHKDSK exit code: $ChkdskExitCode"
    Write-Host "CHKDSK message: $($ScriptResult.system_optimization.chkdsk.message)"
    
} catch {
    $ErrorMsg = "Failed to run CHKDSK: $($_.Exception.Message)"
    $ScriptResult.system_optimization.chkdsk.errors += $ErrorMsg
    Write-Host $ErrorMsg
}

# Run SFC
Write-Host "=========================================="
Write-Host "Running System File Checker (SFC /scannow)..."
Write-Host "=========================================="

try {
    $result = Start-ProcessWithLiveOutput -FilePath "sfc" -Arguments "/scannow" -Name "sfc"
    $ExitCode = $result.ExitCode
    $outputText = $result.Output
    
    $ScriptResult.system_optimization.sfc.run = $true
    $ScriptResult.system_optimization.sfc.exit_code = $ExitCode
    
    # Parse exit codes
    switch ($ExitCode) {
        0 { $ScriptResult.system_optimization.sfc.success = $true; $ScriptResult.system_optimization.sfc.message = "SFC completed successfully. No integrity violations found."; $ScriptResult.system_optimization.sfc.files_repaired = 0 }
        1 { $ScriptResult.system_optimization.sfc.success = $true; $ScriptResult.system_optimization.sfc.message = "SFC completed successfully. Corrupted files were repaired."; $ScriptResult.system_optimization.sfc.files_repaired = 1 }
        2 { $ScriptResult.system_optimization.sfc.success = $false; $ScriptResult.system_optimization.sfc.message = "SFC could not perform the operation. User cancelled or Windows is in safe mode." }
        3 { $ScriptResult.system_optimization.sfc.success = $false; $ScriptResult.system_optimization.sfc.message = "SFC could not fix some files. See CBS.log for details."; $ScriptResult.system_optimization.sfc.files_repaired = -1 }
        -1 { $ScriptResult.system_optimization.sfc.success = $false; $ScriptResult.system_optimization.sfc.message = "SFC encountered an error. Check CBS.log for details." }
        default { $ScriptResult.system_optimization.sfc.success = $false; $ScriptResult.system_optimization.sfc.message = "SFC completed with unexpected exit code: $ExitCode" }
    }
    
    Write-Host "SFC exit code: $ExitCode"
    Write-Host "SFC message: $($ScriptResult.system_optimization.sfc.message)"
    
} catch {
    $ErrorMsg = "Failed to run SFC: $($_.Exception.Message)"
    $ScriptResult.system_optimization.sfc.errors += $ErrorMsg
    Write-Host $ErrorMsg
}

# Run DISM
Write-Host "=========================================="
Write-Host "Running DISM /Online /Cleanup-Image /RestoreHealth..."
Write-Host "=========================================="

try {
    $result = Start-ProcessWithLiveOutput -FilePath "DISM" -Arguments "/Online /Cleanup-Image /RestoreHealth" -Name "dism"
    $ExitCode = $result.ExitCode
    $outputText = $result.Output
    
    $ScriptResult.system_optimization.dism.run = $true
    $ScriptResult.system_optimization.dism.exit_code = $ExitCode
    
    # Parse exit codes
    switch ($ExitCode) {
        0 { $ScriptResult.system_optimization.dism.success = $true; $ScriptResult.system_optimization.dism.component_repaired = $true; $ScriptResult.system_optimization.dism.message = "DISM completed successfully. The component store was repaired." }
        87 { $ScriptResult.system_optimization.dism.success = $false; $ScriptResult.system_optimization.dism.message = "DISM failed. A parameter was invalid. Check the command syntax." }
        3010 { $ScriptResult.system_optimization.dism.success = $true; $ScriptResult.system_optimization.dism.component_repaired = $true; $ScriptResult.system_optimization.dism.message = "DISM completed successfully. A reboot is required." }
        1726 { $ScriptResult.system_optimization.dism.success = $false; $ScriptResult.system_optimization.dism.message = "DISM failed. The remote procedure call failed." }
        1910 { $ScriptResult.system_optimization.dism.success = $false; $ScriptResult.system_optimization.dism.message = "DISM failed. The specified image file could not be found." }
        default {
            if ($ExitCode -ge 0 -and $ExitCode -le 100) {
                $ScriptResult.system_optimization.dism.success = $true
                $ScriptResult.system_optimization.dism.message = "DISM completed with exit code: $ExitCode"
            } else {
                $ScriptResult.system_optimization.dism.success = $false
                $ScriptResult.system_optimization.dism.message = "DISM completed with unexpected exit code: $ExitCode"
            }
        }
    }
    
    Write-Host "DISM exit code: $ExitCode"
    Write-Host "DISM message: $($ScriptResult.system_optimization.dism.message)"
    
} catch {
    $ErrorMsg = "Failed to run DISM: $($_.Exception.Message)"
    $ScriptResult.system_optimization.dism.errors += $ErrorMsg
    Write-Host $ErrorMsg
}

# Output JSON result
Write-Host "=========================================="
Write-Host "System optimization section completed."
Write-Host "=========================================="
$result = $ScriptResult | ConvertTo-Json -Compress -Depth 10
Write-Output $result