# Extract CHM file using PowerShell and HTML Help ActiveX
param(
    [string]$ChmFile = "C:\GEVISOFT\Documentation\GeViSoft .NET SDK API Documentation.chm",
    [string]$OutputDir = "C:\DEV\COPILOT\SOURCES\GeViSoft_API_Documentation_extracted"
)

# Create output directory
New-Item -ItemType Directory -Force -Path $OutputDir | Out-Null

# Try using expand.exe (Windows built-in)
Write-Host "Attempting to extract using expand.exe..."
$tempDir = Join-Path $env:TEMP "chm_extract"
New-Item -ItemType Directory -Force -Path $tempDir | Out-Null

# CHM files are compiled HTML Help files - we can try extracting with expand
$result = & expand.exe "$ChmFile" -F:* "$tempDir" 2>&1

if (Test-Path "$tempDir\*") {
    Write-Host "Extraction successful with expand.exe"
    Copy-Item -Path "$tempDir\*" -Destination $OutputDir -Recurse -Force
    Write-Host "Files copied to $OutputDir"
} else {
    Write-Host "expand.exe failed, trying alternative method..."

    # Try using 7-Zip if available (check common locations)
    $7zipPaths = @(
        "C:\Program Files\7-Zip\7z.exe",
        "C:\Program Files (x86)\7-Zip\7z.exe",
        "$env:ProgramFiles\7-Zip\7z.exe"
    )

    $7zip = $7zipPaths | Where-Object { Test-Path $_ } | Select-Object -First 1

    if ($7zip) {
        Write-Host "Found 7-Zip at: $7zip"
        & $7zip x "$ChmFile" "-o$OutputDir" -y
        Write-Host "Extracted with 7-Zip to $OutputDir"
    } else {
        Write-Host "7-Zip not found. Please install 7-Zip or use another method."
        Write-Host "You can download 7-Zip from: https://www.7-zip.org/"
        exit 1
    }
}

# Count extracted files
$fileCount = (Get-ChildItem -Path $OutputDir -Recurse -File).Count
Write-Host "Total files extracted: $fileCount"