param(
    [string]$ComputerName,
    [string]$ConfigPath,
    [switch]$Demo
)

if ([string]::IsNullOrWhiteSpace($ComputerName)) { return "[]" }

$scriptDir = $PSScriptRoot
$dataDir = Join-Path $scriptDir "Data"

if (-not (Test-Path $dataDir)) { New-Item -ItemType Directory -Path $dataDir | Out-Null }
$cacheFile = Join-Path $dataDir "Software-Cache.json"
$blacklistFile = Join-Path $dataDir "Blacklisted-Apps.txt"

if (-not (Test-Path $cacheFile)) { Set-Content -Path $cacheFile -Value "{}" -Encoding UTF8 }
if (-not (Test-Path $blacklistFile)) { Set-Content -Path $blacklistFile -Value "" -Encoding UTF8 }

. (Join-Path $scriptDir "Lib/Common.ps1")
$config = Import-DashConfig -Path $ConfigPath -Demo:$Demo
$cacheHours = $config.Worker.SoftwareCacheHours

# --- 1. CHECK THE CACHE (24-Hour Timer Only) ---
$needsUpdate = $true
if (Test-Path $cacheFile) {
    try {
        $rawCache = Read-SharedText $cacheFile

        if (-not [string]::IsNullOrWhiteSpace($rawCache)) {
            $cacheData = $rawCache | ConvertFrom-Json

            $propExists = $false
            foreach ($p in $cacheData.psobject.properties) {
                if ($p.Name -eq $ComputerName) { $propExists = $true; break }
            }

            if ($propExists) {
                $deviceCache = $cacheData.$ComputerName
                if ($null -ne $deviceCache.Timestamp -and $null -ne $deviceCache.Data) {
                    $cacheTime = [datetime]$deviceCache.Timestamp

                    # Logic Check: Is cache still fresh?
                    if ($cacheTime -gt (Get-Date).AddHours(-1 * $cacheHours)) {
                        $needsUpdate = $false
                        $outData = @($deviceCache.Data)
                        return (ConvertTo-Json -InputObject $outData -Depth 5 -Compress)
                    }
                }
            }
        }
    } catch {
        # If cache is corrupt, proceed to the provider
    }
}

if (-not $needsUpdate) { return }

# --- 2. LOAD BLACKLIST ---
$blacklist = @()
if (Test-Path $blacklistFile) {
    $blacklist = Get-Content $blacklistFile | Where-Object { $_.Trim() -ne "" } | ForEach-Object { $_.Trim() }
}

# --- 3. PROVIDER QUERY (SCCM SQL in Live mode, simulated fleet in Demo mode) ---
$providerName = if ($config.IsDemo) { "Demo" } else { $config.Provider }
$v = $false
. (Join-Path $scriptDir "Providers/$providerName.ps1")

$results = [System.Collections.Generic.List[PSCustomObject]]::new()

try {
    foreach ($row in (Get-InstalledSoftware -ComputerName $ComputerName)) {
        $appName = "$($row.Name)".Trim()

        if ([string]::IsNullOrWhiteSpace($appName) -or $appName -eq "--") { continue }

        $isSpecialty = $true
        foreach ($badApp in $blacklist) {
            if ($appName -like $badApp) {
                $isSpecialty = $false
                break
            }
        }

        $results.Add([PSCustomObject]@{
            Name        = $appName
            Version     = $row.Version
            Publisher   = $row.Publisher
            Source      = $row.Source
            InstallDate = $row.InstallDate
            IsSpecialty = $isSpecialty
        })
    }
} catch {}

# --- 4. ATOMIC CACHE SAVE ---
try {
    $cacheEntry = [PSCustomObject]@{
        Timestamp = (Get-Date).ToString("o")
        Data      = @($results)
    }

    for ($i = 0; $i -lt 10; $i++) {
        try {
            $fs = [System.IO.File]::Open($cacheFile, [System.IO.FileMode]::OpenOrCreate, [System.IO.FileAccess]::ReadWrite, [System.IO.FileShare]::None)
            $sr = New-Object System.IO.StreamReader($fs)
            $rawCache = $sr.ReadToEnd()

            $latestCache = [PSCustomObject]@{}
            if (-not [string]::IsNullOrWhiteSpace($rawCache)) {
                try { $latestCache = $rawCache | ConvertFrom-Json } catch {}
            }

            $propExists = $false
            foreach ($p in $latestCache.psobject.properties) {
                if ($p.Name -eq $ComputerName) { $propExists = $true; break }
            }

            if ($propExists) {
                $latestCache.$ComputerName = $cacheEntry
            } else {
                $latestCache | Add-Member -MemberType NoteProperty -Name $ComputerName -Value $cacheEntry -Force
            }

            $fs.SetLength(0)
            $sw = New-Object System.IO.StreamWriter($fs, [System.Text.Encoding]::UTF8)
            $sw.Write(($latestCache | ConvertTo-Json -Depth 6 -Compress))
            $sw.Flush()
            $sw.Close()
            $sr.Close()
            $fs.Close()
            break
        } catch {
            Start-Sleep -Milliseconds 300
        }
    }
} catch {}

$outData = @($results)
return (ConvertTo-Json -InputObject $outData -Depth 5 -Compress)