$logPath = "C:\scripts\heartbeat.log"

function Log($msg) {
    $timestamp = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
    Add-Content -Path $logPath -Value "[$timestamp] $msg"
}

# Load config
$configPath = "C:\scripts\config.json"
if (!(Test-Path $configPath)) {
    Log "error Config file not found: $configPath"
    exit 1
}

$config = Get-Content $configPath | ConvertFrom-Json

# Config values
$apiUrl    = $config.apiUrl.TrimEnd('/') # 移除結尾的 /
$branchName  = $config.branchName
$email     = $config.email
$password  = $config.password

Log "📡 Using API URL: $apiUrl"

# Get IP address
$ip = (Get-NetIPAddress -AddressFamily IPv4 | Where-Object {
    $_.IPAddress -notlike "169.*" -and $_.IPAddress -notlike "127.*"
}).IPAddress

function Get-Token {
    $body = @{
        branch_name = $branchName
        room_name = $env:COMPUTERNAME
        room_ip   = $ip
        email     = $email
        password  = $password
    } | ConvertTo-Json -Depth 3

    $url = "$apiUrl/api/room/receiveRegister"
    Log "curl Requesting token from: $url"

    try {
        $response = Invoke-RestMethod -Uri $url -Method Post `
            -Body $body -ContentType "application/json"

        if ($response.data.token) {
            Log "ok Token acquired: $($response.data.token)"
            return $response.data.token
        } else {
            Log "error Failed to acquire token (no token in response)"
            exit 1
        }
    } catch {
        Log "error Token request failed: $($_.Exception.Message)"
        exit 1
    }
}

function Send-Heartbeat($token, $ip) {
    while ($true) {
        $heartbeat = @{
            hostname = $env:COMPUTERNAME
            ip       = $ip
            cpu      = [math]::Round((Get-Counter '\Processor(_Total)\% Processor Time').CounterSamples.CookedValue, 2)
            memory   = [math]::Round((Get-Counter '\Memory\Available MBytes').CounterSamples.CookedValue, 2)
            disk     = [math]::Round((Get-PSDrive -Name C).Used / 1MB, 2)
        } | ConvertTo-Json -Depth 3

        try {
            Invoke-RestMethod -Uri "$apiUrl/api/room/heartbeat" -Method Post `
                -Headers @{ Authorization = "Bearer $token" } `
                -Body $heartbeat -ContentType "application/json"

            Log "ok Heartbeat sent successfully"
        } catch {
            Log "error Heartbeat failed: $($_.Exception.Message)"
        }

        Start-Sleep -Seconds 60
    }
}

# Main
$token = Get-Token
Send-Heartbeat -token $token -ip $ip