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

Write-Host "[*] Installing essential applications for User"
Write-Host "Applications: AnyDesk, LINE, Chrome, 7zip, Adobe Reader"
Write-Host ""

# Function to test if an app is already installed
function Test-AppInstalled {
    param([string]$AppName, [string]$ProcessName)

    # Check via Get-WmiObject for installed programs
    $installed = Get-WmiObject -Class Win32_Product | Where-Object { $_.Name -like "*$AppName*" }
    if ($installed) {
        Write-Host "    $AppName is already installed: $($installed.Name)"
        return $true
    }

    # Check via registry (more reliable for some apps)
    $regPaths = @(
        "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\*",
        "HKLM:\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*"
    )

    foreach ($path in $regPaths) {
        $apps = Get-ItemProperty $path -ErrorAction SilentlyContinue | Where-Object { $_.DisplayName -like "*$AppName*" }
        if ($apps) {
            Write-Host "    $AppName is already installed: $($apps[0].DisplayName)"
            return $true
        }
    }

    return $false
}

# Function to install via winget
function Install-ViaWinget {
    param([string]$AppId, [string]$AppName)

    Write-Host "    Trying winget install $AppId"
    try {
        $result = & winget install $AppId --accept-package-agreements --accept-source-agreements --silent
        if ($LASTEXITCODE -eq 0) {
            Write-Host "    [OK] $AppName installed via winget"
            return $true
        } else {
            Write-Host "    Winget install failed for $AppName"
            return $false
        }
    } catch {
        Write-Host "    Winget not available or failed: $($_.Exception.Message)"
        return $false
    }
}

# Function to download and install manually
function Install-Manual {
    param([string]$Url, [string]$FileName, [string]$Args, [string]$AppName)

    Write-Host "    Downloading $AppName from $Url"

    $downloadPath = Join-Path $env:TEMP $FileName
    try {
        Invoke-WebRequest -Uri $Url -OutFile $downloadPath -UseBasicParsing
        Write-Host "    Downloaded to $downloadPath"

        Write-Host "    Installing $AppName..."
        if ($Args) {
            & $downloadPath $Args.Split(' ')
        } else {
            & $downloadPath
        }

        Start-Sleep -Seconds 3

        # Clean up
        Remove-Item $downloadPath -Force -ErrorAction SilentlyContinue
        Write-Host "    [OK] $AppName installation completed"
        return $true

    } catch {
        Write-Host "    [!] Manual install failed for $AppName: $($_.Exception.Message)"
        return $false
    }
}

Write-Host "[1/5] Installing AnyDesk"
if (-not (Test-AppInstalled -AppName "AnyDesk" -ProcessName "AnyDesk")) {
    if (-not (Install-ViaWinget -AppId "AnyDeskSoftwareGmbH.AnyDesk" -AppName "AnyDesk")) {
        Install-Manual -Url "https://download.anydesk.com/AnyDesk.exe" -FileName "AnyDesk.exe" -Args "--install --start-with-win --silent" -AppName "AnyDesk"
    }
} else {
    Write-Host "    [SKIP] AnyDesk already installed"
}

Write-Host ""
Write-Host "[2/5] Installing LINE"
if (-not (Test-AppInstalled -AppName "LINE" -ProcessName "LINE")) {
    if (-not (Install-ViaWinget -AppId "LINE.LINE" -AppName "LINE")) {
        Install-Manual -Url "https://desktop.line-scdn.net/win/new/LineInst.exe" -FileName "LineInst.exe" -Args "/S" -AppName "LINE"
    }
} else {
    Write-Host "    [SKIP] LINE already installed"
}

Write-Host ""
Write-Host "[3/5] Installing Google Chrome"
if (-not (Test-AppInstalled -AppName "Chrome" -ProcessName "chrome")) {
    if (-not (Install-ViaWinget -AppId "Google.Chrome" -AppName "Chrome")) {
        Install-Manual -Url "https://dl.google.com/chrome/install/GoogleChromeStandaloneEnterprise64.msi" -FileName "ChromeSetup.msi" -Args "/quiet /norestart" -AppName "Chrome"
    }
} else {
    Write-Host "    [SKIP] Chrome already installed"
}

Write-Host ""
Write-Host "[4/5] Installing 7-Zip"
if (-not (Test-AppInstalled -AppName "7-Zip" -ProcessName "7zFM")) {
    if (-not (Install-ViaWinget -AppId "7zip.7zip" -AppName "7-Zip")) {
        Install-Manual -Url "https://7-zip.org/a/7z2301-x64.msi" -FileName "7zip-setup.msi" -Args "/quiet /norestart" -AppName "7-Zip"
    }
} else {
    Write-Host "    [SKIP] 7-Zip already installed"
}

Write-Host ""
Write-Host "[5/5] Installing Adobe Reader"
if (-not (Test-AppInstalled -AppName "Adobe" -ProcessName "AcroRd32")) {
    if (-not (Install-ViaWinget -AppId "Adobe.Acrobat.Reader.64-bit" -AppName "Adobe Reader")) {
        # Adobe Reader requires more complex download, try alternative
        Write-Host "    [!] Adobe Reader requires manual download from Adobe website"
        Write-Host "    Please visit: https://get.adobe.com/reader/"
        Write-Host "    Or try: winget install Adobe.Acrobat.Reader.64-bit"
    }
} else {
    Write-Host "    [SKIP] Adobe Reader already installed"
}

Write-Host ""
Write-Host "=== Installation Summary ==="

# Final verification
$apps = @(
    @{Name="AnyDesk"; Process="AnyDesk"}
    @{Name="LINE"; Process="LINE"}
    @{Name="Chrome"; Process="chrome"}
    @{Name="7-Zip"; Process="7zFM"}
    @{Name="Adobe"; Process="AcroRd32"}
)

foreach ($app in $apps) {
    $installed = Test-AppInstalled -AppName $app.Name -ProcessName $app.Process
    if ($installed) {
        Write-Host "[OK] $($app.Name) - Installed"
    } else {
        Write-Host "[!]  $($app.Name) - Not detected (may need manual verification)"
    }
}

Write-Host ""
Write-Host "[*] Application installation process completed"
Write-Host "Note: Some applications may require restart to appear in Start Menu"
Write-Host "All applications will be available to all users on this computer"