#!/usr/bin/env pwsh
<#
.SYNOPSIS
    Generates platyPS markdown help and MAML XML help for PSProxmoxVE.

.DESCRIPTION
    This script:
    1. Builds the module to publish/netstandard2.0/
    2. Installs platyPS if needed
    3. Creates markdown stubs for NEW cmdlets only (preserves existing docs)
    4. Updates existing markdown docs (merges parameter changes, preserves descriptions/examples)
    5. Generates MAML XML help from the markdown
    6. Copies the MAML XML to src/PSProxmoxVE/ for inclusion in builds

.PARAMETER Force
    Regenerate all markdown from scratch, overwriting hand-written content.
    Use with caution — this will replace all descriptions and examples.

.NOTES
    Run from the repository root:
        pwsh -NoProfile -File ./generate-help.ps1
#>
param(
    [switch]$Force
)

$ErrorActionPreference = 'Stop'
Set-StrictMode -Version Latest

$repoRoot = $PSScriptRoot
Push-Location $repoRoot

try {
    # Step 1: Build the module
    Write-Host "Building module..." -ForegroundColor Cyan
    dotnet publish src/PSProxmoxVE/PSProxmoxVE.csproj `
        --configuration Release `
        --framework netstandard2.0 `
        --output ./publish/netstandard2.0 | Out-Null
    Remove-Item ./publish/netstandard2.0/*.deps.json, ./publish/netstandard2.0/*.runtimeconfig.json -ErrorAction SilentlyContinue

    # Step 2: Install platyPS if needed
    if (-not (Get-Module -ListAvailable -Name platyPS)) {
        Write-Host "Installing platyPS..." -ForegroundColor Cyan
        Install-Module platyPS -Force -Scope CurrentUser
    }

    # Step 3: Import modules
    Write-Host "Importing modules..." -ForegroundColor Cyan
    Import-Module platyPS -Force
    Import-Module ./publish/netstandard2.0/PSProxmoxVE.psd1 -Force

    # Step 4: Create output directory
    $docsDir = Join-Path $repoRoot 'docs/cmdlets'
    if (-not (Test-Path $docsDir)) {
        New-Item -ItemType Directory -Path $docsDir -Force | Out-Null
    }

    # Step 5: Generate or update markdown help
    $existingDocs = Get-ChildItem "$docsDir/*.md" -ErrorAction SilentlyContinue

    if ($Force -or $existingDocs.Count -eq 0) {
        # Full generation — creates all markdown from scratch
        Write-Host "Generating all markdown help (full)..." -ForegroundColor Cyan
        New-MarkdownHelp -Module PSProxmoxVE -OutputFolder $docsDir -Force | Out-Null
    }
    else {
        # Update existing docs: merge parameter/syntax changes, preserve descriptions & examples
        Write-Host "Updating existing markdown help (merge)..." -ForegroundColor Cyan
        Update-MarkdownHelp -Path $docsDir -Force | Out-Null

        # Create stubs for any NEW cmdlets not yet documented
        $documentedCmdlets = @($existingDocs | ForEach-Object { $_.BaseName })
        $moduleCmdlets = @((Get-Command -Module PSProxmoxVE -CommandType Cmdlet).Name)
        $newCmdlets = @($moduleCmdlets | Where-Object { $_ -notin $documentedCmdlets })

        if ($newCmdlets.Count -gt 0) {
            Write-Host "  Creating stubs for $($newCmdlets.Count) new cmdlet(s):" -ForegroundColor Yellow
            foreach ($cmdlet in $newCmdlets) {
                Write-Host "    + $cmdlet" -ForegroundColor Yellow
                New-MarkdownHelp -Command $cmdlet -OutputFolder $docsDir -Force | Out-Null
            }
        }
        else {
            Write-Host "  No new cmdlets to document" -ForegroundColor Green
        }
    }

    $mdCount = (Get-ChildItem "$docsDir/*.md" | Measure-Object).Count
    Write-Host "  Markdown files: $mdCount" -ForegroundColor Green

    # Step 6: Generate MAML XML help from markdown
    Write-Host "Generating MAML XML help..." -ForegroundColor Cyan
    New-ExternalHelp -Path $docsDir -OutputPath ./publish/netstandard2.0/ -Force | Out-Null

    # Step 7: Copy MAML XML to src directory for build inclusion
    $mamlFiles = Get-ChildItem ./publish/netstandard2.0/*-Help.xml
    foreach ($f in $mamlFiles) {
        $dest = Join-Path 'src/PSProxmoxVE' $f.Name
        Copy-Item $f.FullName $dest -Force
        Write-Host "  Copied $($f.Name) to src/PSProxmoxVE/" -ForegroundColor Green
    }

    # Step 8: Verify
    Write-Host "`nVerification:" -ForegroundColor Cyan
    Write-Host "  Markdown files: $mdCount" -ForegroundColor Green
    foreach ($f in $mamlFiles) {
        $size = [math]::Round($f.Length / 1024, 1)
        Write-Host "  MAML XML: $($f.Name) (${size} KB)" -ForegroundColor Green
    }

    Write-Host "`nDone! Help generation complete." -ForegroundColor Green
}
finally {
    Pop-Location
}