# You write your bicep code this script generates the currently requierd json parameter file by transforming the bicep build output
# Requiers bicep CLI
# Tested with Bicep CLI version 0.4.1008 (223b8d227a)

# Authored by: Asbjørn Wiik

param (
    [string]$File,   
    [int]$jsonDepth = 50
)

$outParameterfile = $File.Replace('.bicep', '.json')

# If running on the deployment bicep file add .parameters.json to outParameterfile
if (-not ($outParameterfile -match "parameters.json")) {
    $outParameterfile = "$(($outParameterfile.Split('.json'))[0]).parameters.json"
}

# Traditional bicep build file
bicep build $File --outfile $outParameterfile 

# Pickup the file and do a simple string substitution
$outParameterfileContent = (Get-Content $outParameterfile -Raw ) -replace '"defaultValue"', '"value"'

# Converting form json  
$outParameterfileContent = ConvertFrom-Json -Depth $jsonDepth $outParameterfileContent

# Leave what we want
$outParameterfileContent = $outParameterfileContent | Select-Object '$schema', contentVersion, parameters
$outParameterfileContent.'$schema' = "https://schema.management.azure.com/schemas/2019-04-01/deploymentParameters.json#"

# Grabbing list of the parameter names
$myparams = ($outParameterfileContent.parameters | Get-Member | Where-Object { $_.MemberType -match "NoteProperty" } | Select-Object Name).Name

# Filtering out other crudd and adding missing value blocks
foreach ($item in $myparams) {
    if ($null -eq ($outParameterfileContent.parameters.$item | Select-Object value).value ) {
        # If run on deployment bicep file there might not be a set a default value. Adding and replacing other stuff
        $outParameterfileContent.parameters.$item = [pscustomobject]@{'value' = 'missing value' }        
    }
    else {
        # Filtering out all but the value 
        $outParameterfileContent.parameters.$item = $outParameterfileContent.parameters.$item | Select-Object value    
    }
}

# Converting outParameterfileContent to json and writing parameter file
$outParameterfileContent | ConvertTo-Json -Depth $jsonDepth | Set-Content $outParameterfile