param(
    [Parameter(Mandatory = $true)]
    [string]$Message,

    [string]$BotToken = $env:TELEGRAM_BOT_TOKEN,
    [string]$ChatId = $env:TELEGRAM_CHAT_ID,
    [string]$ConfigPath = (Join-Path $PSScriptRoot "telegram.local.json")
)

$ErrorActionPreference = "Stop"

if (([string]::IsNullOrWhiteSpace($BotToken) -or [string]::IsNullOrWhiteSpace($ChatId)) -and (Test-Path -LiteralPath $ConfigPath)) {
    $config = Get-Content -LiteralPath $ConfigPath -Raw | ConvertFrom-Json
    if ([string]::IsNullOrWhiteSpace($BotToken)) {
        $BotToken = $config.bot_token
    }
    if ([string]::IsNullOrWhiteSpace($ChatId)) {
        $ChatId = $config.chat_id
    }
}

if ([string]::IsNullOrWhiteSpace($BotToken) -or [string]::IsNullOrWhiteSpace($ChatId)) {
    exit 0
}

$uri = "https://api.telegram.org/bot$BotToken/sendMessage"
$body = @{
    chat_id = $ChatId
    text = $Message
    disable_web_page_preview = $true
}

Invoke-RestMethod -Uri $uri -Method Post -Body $body | Out-Null