[Console]::OutputEncoding = [Text.Encoding]::UTF8
$ErrorActionPreference = 'Continue'

Write-Host "[*] Investigating application installation failures"
Write-Host ""

# Error code analysis
Write-Host "=== Error Code Analysis ==="
Write-Host "Error code -1978335212 (0x8A150054) typically indicates:"
Write-Host "- APPINSTALLER_CLI_ERROR_INSTALLER_FAILED"
Write-Host "- The package installer failed during execution"
Write-Host ""

Write-Host "[1] Checking system requirements and dependencies..."

# Check Windows version
$osInfo = Get-ComputerInfo | Select-Object WindowsProductName, WindowsVersion, WindowsBuildLabEx
Write-Host "OS: $($osInfo.WindowsProductName)"
Write-Host "Version: $($osInfo.WindowsVersion)"
Write-Host "Build: $($osInfo.WindowsBuildLabEx)"

# Check available disk space
$disk = Get-WmiObject -Class Win32_LogicalDisk | Where-Object {$_.DeviceID -eq "C:"}
$freeSpaceGB = [math]::Round($disk.FreeSpace / 1GB, 2)
Write-Host "Free space on C: drive: $freeSpaceGB GB"

Write-Host ""
Write-Host "[2] Checking for conflicting installations..."

# Check if any versions are already partially installed
$installedApps = Get-WmiObject -Class Win32_Product | Where-Object {
    $_.Name -like "*AnyDesk*" -or
    $_.Name -like "*LINE*" -or
    $_.Name -like "*Adobe*Reader*"
} | Select-Object Name, Version, IdentifyingNumber

if ($installedApps) {
    Write-Host "Found existing installations:"
    foreach ($app in $installedApps) {
        Write-Host "  - $($app.Name) v$($app.Version)"
    }
} else {
    Write-Host "No conflicting installations found"
}

Write-Host ""
Write-Host "[3] Testing individual app availability..."

$failedApps = @(
    @{Name="AnyDesk"; Id="AnyDeskSoftwareGmbH.AnyDesk"},
    @{Name="LINE"; Id="LINE.LINE"},
    @{Name="Adobe Reader"; Id="Adobe.Acrobat.Reader.64-bit"}
)

foreach ($app in $failedApps) {
    Write-Host "Testing $($app.Name)..."

    # Check if app is available in winget
    try {
        $searchResult = & winget show $app.Id --source winget 2>&1
        if ($LASTEXITCODE -eq 0) {
            Write-Host "  [OK] Package found in winget"

            # Extract some key info
            $lines = $searchResult -split "`n"
            foreach ($line in $lines) {
                if ($line -like "*Version:*" -or $line -like "*Publisher:*" -or $line -like "*Package Url:*") {
                    Write-Host "  $line"
                }
            }
        } else {
            Write-Host "  [!] Package not found or access denied"
        }
    } catch {
        Write-Host "  [!] Search failed: $($_.Exception.Message)"
    }

    Write-Host ""
}

Write-Host "[4] Checking system policies and restrictions..."

# Check execution policy
$execPolicy = Get-ExecutionPolicy -Scope LocalMachine
Write-Host "Execution Policy: $execPolicy"

# Check if running as administrator
$isAdmin = ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)
Write-Host "Running as Administrator: $isAdmin"

# Check Windows Defender status
try {
    $defender = Get-MpPreference -ErrorAction SilentlyContinue
    if ($defender) {
        Write-Host "Windows Defender Real-time Protection: $($defender.DisableRealtimeMonitoring -eq $false)"
    }
} catch {
    Write-Host "Cannot check Windows Defender status"
}

Write-Host ""
Write-Host "[5] Testing direct download availability..."

$downloadTests = @(
    @{Name="AnyDesk"; Url="https://download.anydesk.com/AnyDesk.exe"},
    @{Name="LINE"; Url="https://desktop.line-scdn.net/win/new/LineInst.exe"},
    @{Name="Adobe Reader"; Url="https://ardownload2.adobe.com/pub/adobe/reader/win/AcrobatDC/2300820555/AcroRdrDC2300820555_en_US.exe"}
)

foreach ($test in $downloadTests) {
    Write-Host "Testing $($test.Name) direct download..."
    try {
        $webRequest = Invoke-WebRequest -Uri $test.Url -Method Head -UseBasicParsing -TimeoutSec 10
        Write-Host "  [OK] Direct download available (Status: $($webRequest.StatusCode))"
    } catch {
        Write-Host "  [!] Direct download failed: $($_.Exception.Message)"
    }
}

Write-Host ""
Write-Host "=== Investigation Summary ==="
Write-Host ""
Write-Host "Possible reasons for failures:"
Write-Host "1. Package installer requirements not met (missing dependencies)"
Write-Host "2. Antivirus/Windows Defender blocking installation"
Write-Host "3. Insufficient permissions despite administrator status"
Write-Host "4. Network connectivity issues to specific download servers"
Write-Host "5. Package conflicts with existing system components"
Write-Host "6. Windows version compatibility issues"
Write-Host ""
Write-Host "Recommended solutions:"
Write-Host "1. Try direct installer downloads with elevated permissions"
Write-Host "2. Temporarily disable real-time protection during installation"
Write-Host "3. Use alternative installation sources or older versions"
Write-Host "4. Install dependencies manually before main applications"