#!/usr/bin/env pwsh -c
<#
.PARAMETER BuildXml
    The URL or file path to a build.xml file that defines package versions to be used
#>
[CmdletBinding()]
param(
    [Parameter(Mandatory = $true)]
    $BuildXml
)

$ErrorActionPreference = 'Stop'
Import-Module -Scope Local -Force "$PSScriptRoot/common.psm1"
Set-StrictMode -Version 1

$depsPath = Resolve-Path "$PSScriptRoot/../build/dependencies.props"
[xml] $dependencies = LoadXml $depsPath

if ($BuildXml -like 'http*') {
    $url = $BuildXml
    New-Item -Type Directory "$PSScriptRoot/../obj/" -ErrorAction Ignore
    $BuildXml = "$PSScriptRoot/../obj/build.xml"
    Write-Verbose "Downloading from $url to $BuildXml"
    Invoke-WebRequest -OutFile $BuildXml $url
}

[xml] $remoteDeps = LoadXml $BuildXml
$count = 0

$variables = @{}

foreach ($package in $remoteDeps.SelectNodes('//Package')) {
    $packageId = $package.Id
    $packageVersion = $package.Version
    $varName = PackageIdVarName $packageId
    Write-Verbose "Found {id: $packageId, version: $packageVersion, varName: $varName }"

    if ($variables[$varName]) {
        $variables[$varName] += $packageVersion
    } else {
        $variables[$varName] = @($packageVersion)
    }
}

foreach ($varName in ($variables.Keys | sort)) {
    $packageVersions = $variables[$varName]
    if ($packageVersions.Length -gt 1){
        Write-Warning "Skipped $varName. Multiple version found. { $($packageVersions -join ', ') }."
        continue
    }

    $packageVersion = $packageVersions | Select-Object -First 1

    $depVarNode = $dependencies.SelectSingleNode("//PropertyGroup/$varName")
    if ($depVarNode -and $depVarNode.InnerText -ne $packageVersion) {
        $depVarNode.InnerText = $packageVersion
        $count++
        Write-Host -f DarkGray "   Updating $varName to $packageVersion"
    }
}

if ($count -gt 0) {
    Write-Host -f Cyan "Updating $count version variables in $depsPath"
    SaveXml $dependencies $depsPath
}
else {
    Write-Host -f Green "No changes found"
}