$pythonVersion = "3.11.9"
$pythonVersionShort = "3.11"
$pythonInstallerUrl = "https://www.python.org/ftp/python/${pythonVersion}/python-${pythonVersion}-amd64.exe"
$pythonInstallerPath = "$env:TEMP\python-${pythonVersion}.exe"
$pyActivate = Join-Path . "Scripts\Activate.ps1"

$espeakngVersion = "1.51"
$espeakngInstallerUrl = "https://github.com/espeak-ng/espeak-ng/releases/download/${espeakngVersion}/espeak-ng-X64.msi"
$espeakngInstallerPath = "$env:TEMP\espeak-ng-${espeakngVersion}.msi"

$msBuildToolsVersion = "17"
$msBuildToolsInstallerUrl = "https://aka.ms/vs/${msBuildToolsVersion}/release/vs_BuildTools.exe"
$msBuildToolsInstallerPath = "$env:TEMP\vs_BuildTools${msBuildToolsVersion}.exe"

$cudaToolkitVersion = "12.4.1_551.78"
$cudaToolkitInstallerUrl = "https://developer.download.nvidia.com/compute/cuda/12.4.1/local_installers/cuda_${cudaToolkitVersion}_windows.exe"
$cudaToolkitInstallerPath = "$env:TEMP\cudaToolkit_${cudaToolkitVersion}.exe"

$pytorchVersion = "CUDA 12.4"
$pytorchInstallCommand = "pip3 install torch torchvision torchaudio --index-url https://download.pytorch.org/whl/cu124"

$coquiVersion = "0.25.1"
$coquiZipUrl = "https://github.com/idiap/coqui-ai-TTS/archive/refs/tags/v$coquiVersion.zip"
$coquiZipPath = "$env:TEMP\coqui_v$coquiVersion.zip"

function Is-PythonInstalled {
    try {
        $pythonVersionOutput = python --version 2>&1
        if ($pythonVersionOutput -match "Python ($pythonVersion)") {
            Write-Output "Python $($matches[1]) is already installed."
            return $true
        } else {
            return $false
        }
    } catch {
        return $false
    }
}

function Install-Python {
    Write-Output "Installing Python $pythonVersion..."
    Invoke-WebRequest -Uri $pythonInstallerUrl -OutFile $pythonInstallerPath
    Start-Process -FilePath $pythonInstallerPath -ArgumentList "/quiet InstallAllUsers=1 PrependPath=1" -Wait
    Remove-Item $pythonInstallerPath -Force
}

function Setup-Python-Environment {
    py -$pythonVersionShort -m venv .
    & $pyActivate
    python -m pip install --upgrade pip setuptools wheel
    deactivate
}

function Install-Espeakng {
    Write-Output "Installing eSpeak-ng $espeakngVersion..."
    Invoke-WebRequest -Uri $espeakngInstallerUrl -OutFile $espeakngInstallerPath
    Start-Process -FilePath "msiexec.exe" -ArgumentList "/i `"$espeakngInstallerPath`" /passive /norestart" -Wait
    Remove-Item $espeakngInstallerPath -Force
}

function Install-MsBuildTools {
    Write-Output "Installing Visual Studio Build Tools $msBuildToolsVersion..."
    Invoke-WebRequest -Uri $msBuildToolsInstallerUrl -OutFile $msBuildToolsInstallerPath
    Start-Process -FilePath $msBuildToolsInstallerPath -ArgumentList `
    "--passive --wait --norestart --add Microsoft.VisualStudio.Workload.VCTools --includeRecommended" -Wait
    Remove-Item $msBuildToolsInstallerPath -Force
}

function Install-CUDA { 
    Write-Output "Installing CUDA Toolkit $cudaToolkitVersion..."
    Invoke-WebRequest -Uri $cudaToolkitInstallerUrl -OutFile $cudaToolkitInstallerPath
    Start-Process -FilePath $cudaToolkitInstallerPath -ArgumentList "-s -n" -Wait
    Remove-Item $cudaToolkitInstallerPath -Force
}

function Install-PyTorch {
    Write-Output "Installing PyTorch $pytorchVersion..."
    & $pyActivate
    Invoke-Expression "$pytorchInstallCommand --quiet"
    deactivate
}

function Install-Coqui {
    Write-Output "Installing Coqui $coquiVersion..."
    Invoke-WebRequest -Uri $coquiZipUrl -OutFile $coquiZipPath
    Expand-Archive -Path $coquiZipPath -DestinationPath . -Force
    Remove-Item $coquiZipPath -Force
    
    & $pyActivate
    cd coqui-ai-TTS-$coquiVersion
    pip install -e . --quiet
    deactivate
    cd ..
}



Write-Output "Starting voice environment installation."
Set-ExecutionPolicy Unrestricted
if (-not (Is-PythonInstalled)) {
    Install-Python
}
Setup-Python-Environment
Install-Espeakng
Install-MsBuildTools
Install-CUDA
Install-PyTorch
Install-Coqui
mkdir output
Write-Output "Install finished. Please restart your machine before first startup."
Write-Output "To generate dialogue type in PS terminal in VoiceGenerator directory:`n 1] .\Scripts\Activate.ps1`n 2] py GenerateDialogue.py."