param([switch]$StartAfterInstall)

$ErrorActionPreference = 'Stop'
[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12

$packageUrl = 'https://decathlon.jokonet.com/api/client/download'
$installDir = '%LOCALAPPDATA%\Programs\CallRecorder'
$exeName = 'CallRecorder.exe'
$installVcRedist = $true
$vcRedistUrl = 'https://aka.ms/vs/17/release/vc_redist.x64.exe'

$installDir = [Environment]::ExpandEnvironmentVariables($installDir)

function Test-VcRedistInstalled {
    $keys = @(
        'HKLM:\SOFTWARE\Microsoft\VisualStudio\14.0\VC\Runtimes\x64',
        'HKLM:\SOFTWARE\WOW6432Node\Microsoft\VisualStudio\14.0\VC\Runtimes\x64'
    )

    foreach ($key in $keys) {
        try {
            $item = Get-ItemProperty -Path $key -ErrorAction Stop
            if ($item.Installed -eq 1) { return $true }
        } catch {}
    }

    return $false
}

function Install-VcRedistIfNeeded {
    if (-not $installVcRedist) {
        Write-Host 'VC++ redistributable check disabled by configuration.'
        return
    }

    if (Test-VcRedistInstalled) {
        Write-Host 'VC++ redistributable already installed.'
        return
    }

    Write-Host 'VC++ redistributable not found, installing...'
    $vcExe = Join-Path $env:TEMP 'vc_redist.x64.exe'
    Invoke-WebRequest -Uri $vcRedistUrl -OutFile $vcExe

    try {
        Start-Process -FilePath $vcExe -ArgumentList '/install', '/quiet', '/norestart' -Wait -NoNewWindow | Out-Null
    } catch {
        Write-Warning 'VC++ installation failed. You may need to run this script as Administrator.'
    }
}

Install-VcRedistIfNeeded

$tempRoot = Join-Path $env:TEMP ('CallRecorderInstall_' + [Guid]::NewGuid().ToString('N'))
New-Item -ItemType Directory -Path $tempRoot -Force | Out-Null
$zipPath = Join-Path $tempRoot 'CallRecorderClientBundle.zip'

Write-Host 'Downloading client package...'
Invoke-WebRequest -Uri $packageUrl -OutFile $zipPath

Get-Process -Name 'CallRecorder' -ErrorAction SilentlyContinue | Stop-Process -Force

if (Test-Path $installDir) {
    Remove-Item -Path $installDir -Recurse -Force
}
New-Item -ItemType Directory -Path $installDir -Force | Out-Null

Write-Host 'Extracting package...'
Expand-Archive -Path $zipPath -DestinationPath $installDir -Force

$exePath = Join-Path $installDir $exeName
if (-not (Test-Path $exePath)) {
    throw "Executable not found after extraction: $exePath"
}

$desktopPath = [Environment]::GetFolderPath('Desktop')
$launcherPath = Join-Path $desktopPath 'CallRecorder.cmd'
$launcherContent = @"
@echo off
cd /d "$installDir"
start "" "$exePath"
"@
Set-Content -Path $launcherPath -Value $launcherContent -Encoding Ascii -Force
Write-Host "Desktop launcher created: $launcherPath"

try {
    $shortcutPath = Join-Path $desktopPath 'CallRecorder.lnk'
    $shell = New-Object -ComObject WScript.Shell
    $shortcut = $shell.CreateShortcut($shortcutPath)
    $shortcut.TargetPath = $launcherPath
    $shortcut.WorkingDirectory = $installDir
    $shortcut.Save()
} catch {
    Write-Warning 'Desktop .lnk shortcut creation failed. .cmd launcher is available.'
}

Remove-Item -Path $tempRoot -Recurse -Force -ErrorAction SilentlyContinue
Write-Host "Installation completed: $exePath"

if ($StartAfterInstall) {
    Start-Process -FilePath $exePath
}