$SparkHeaders = @{
    "Content-Type" = "application/json"
    "Authorization" = ""
    "Accept" = "*/*"
    "Accept-Encoding" = "gzip, deflate, br"
}

$SparkTenantPrefix = "samaritanhealth-amc"
$SparkURL = "https://$SparkTenantPrefix.ivanticloud.com"

Function Connect-ISM {
    try {
        #Try a fast route to check if authorization headers are set properly
        Invoke-RestMethod -Method Get -URI "$SparkURL/api/odata" -Headers $SparkHeaders
    } catch {
        $errobject = ConvertFrom-Json $_
        #A 404 means we were authorized and didn't find anything, as intended!
        if ($errobject.code -eq "ISM_4004") { return }
        #Anything other than a 401 Unauthorized is unexpected, attempt to handle gracefully
        if ($errobject.code -ne "ISM_4001") { 
            Write-Host -ForegroundColor Red "Unexpected error connecting to Spark!"
            Write-Host -ForegroundColor Red "$errobject"
            $SparkHeaders["Authorization"] = ""
            return 
        }
        #Unuathorized response, so let's update our authorization!
        if ( $SparkHeaders["Authorization"] ) {
            Write-Host "Spark Authorization key expired, please update key"
        }
        $authKey = Read-Host "Login to Spark, open browser dev tools, and paste SID cookie here, or an API key if you have one"
        if ($authKey -match "[0-9A-F](32)") {
            $SparkHeaders["Authorization"] = "rest_api_key=$authKey"
        } elseif ($authKey -match "$($SparkURL.split('/')[-1])#.*#") {
            $SparkHeaders["Authorization"] = $authKey
        } else {
            Write-Host -ForegroundColor Yellow "Authorization key not a recognized key format"
            $SparkHeaders["Authorization"] = ""
        }
    }
}

Function Check-SparkEnabled {
    return -not -not $SparkHeaders["Authorization"]
}

Function Search-SparkCIs($CIName) {
    Connect-ISM
    $uri = "$SparkURL/api/odata/businessobject/CIs`?`$filter=Name+eq+%27$CIName%27&`$top=100&`$skip=0"
    try{
        $Query = Invoke-RestMethod -Method GET -uri $uri -headers $SparkHeaders
    } catch {
        $ExceptionErrors += $_.Exception.Message
    }
    return $Query.Value
}