Example.ps1

<#
.SYNOPSIS
    End-to-end example: sign in to Azure, pick an Application Gateway,
    export it with Dump-AzAppGWInfo, then launch the Flask visualizer.

.DESCRIPTION
    1. Signs in to Azure (Connect-AzAccount) if there is no current context.
    2. Lists the Application Gateways in the current subscription.
    3. Exports the selected gateway with Dump-AzAppGWInfo -Force to the
       data folder as <gateway-name>-appgw.json.
    4. Runs .\start.ps1 to start the Flask app (http://localhost:5999).
    5. Opens the app in the default browser once it responds.

.NOTES
    Requires the Az.Accounts, Az.Network and Az.Resources modules:
        Install-Module Az.Accounts, Az.Network, Az.Resources
#>

$Script:ErrorActionPreference = 'Break'

Set-Location -Path $PSScriptRoot

# ---- prerequisites ---------------------------------------------------------
foreach ($cmd in 'Connect-AzAccount', 'Get-AzContext', 'Get-AzApplicationGateway', 'Get-AzResource') {
    if (-not (Get-Command $cmd -ErrorAction SilentlyContinue)) {
        throw "Required command '$cmd' not found. Install the Az modules: Install-Module Az.Accounts, Az.Network, Az.Resources"
    }
}

# Dot-source Dump-AzAppGWInfo.ps1 to load the Dump-AzAppGWInfo function.
. (Join-Path $PSScriptRoot 'Dump-AzAppGWInfo.ps1')

# ---- sign in if not already ------------------------------------------------
$ctx = Get-AzContext -ErrorAction SilentlyContinue
if (-not $ctx -or -not $ctx.Account) {
    Write-Host "No Azure session found - signing in..."
    Connect-AzAccount -ErrorAction Stop | Out-Null
    $ctx = Get-AzContext
}
Write-Host ("Using subscription: {0} ({1})" -f $ctx.Subscription.Name, $ctx.Subscription.Id)

# ---- list the Application Gateways and pick one ----------------------------
Write-Host "Finding Application Gateways..."
$gateways = @(Get-AzApplicationGateway -ErrorAction Stop)
if ($gateways.Count -eq 0) {
    throw "No Application Gateways found in subscription '$($ctx.Subscription.Name)'."
}

if ($gateways.Count -eq 1) {
    $selected = $gateways[0]
    Write-Host ("Found one Application Gateway: {0}  (resource group: {1})" -f $selected.Name, $selected.ResourceGroupName)
}
else {
    Write-Host "Select an Application Gateway to export:"
    for ($i = 0; $i -lt $gateways.Count; $i++) {
        Write-Host ("  [{0}] {1}  (resource group: {2}, location: {3})" -f $i, $gateways[$i].Name, $gateways[$i].ResourceGroupName, $gateways[$i].Location)
    }
    $choice = Read-Host "Enter number (0-$($gateways.Count - 1))"
    if ($choice -notmatch '^\d+$' -or [int]$choice -ge $gateways.Count) { throw "Invalid selection." }
    $selected = $gateways[[int]$choice]
}

# ---- export the selected gateway (overwrites any previous export) ----------
$selected | Dump-AzAppGWInfo -Force

# ---- start the Flask visualizer --------------------------------------------
& (Join-Path $PSScriptRoot 'start.ps1')