# 讀取 config 檔
$configPath = "C:\scripts\config.json"
if (!(Test-Path $configPath)) {
    Write-Error "❌ 找不到設定檔：$configPath"
    exit 1
}
$config = Get-Content $configPath | ConvertFrom-Json

# 使用設定值
$apiUrl    = $config.apiUrl
$branchId  = $config.branchId
$roomName  = $config.roomName
$email     = $config.email
$password  = $config.password

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

function Get-Token {
    $body = @{
        branch_id = $branchId
        room_name = $roomName
        email     = $email
        password  = $password
    } | ConvertTo-Json -Depth 3

    $response = Invoke-RestMethod -Uri "$apiUrl/api/room/receiveRegister" -Method Post `
        -Body $body -ContentType "application/json"

    if ($response.token) {
        Write-Output "✅ Token 取得成功：$($response.token)"
        return $response.token
    } else {
        Write-Error "❌ 無法取得 Token"
        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)
            status   = "online"
        } | ConvertTo-Json -Depth 3

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

            Write-Output "✅ 心跳送出：$(Get-Date)"
        } catch {
            Write-Error "❌ 心跳失敗：$($_.Exception.Message)"
        }

        Start-Sleep -Seconds 60
    }
}

# 執行主流程
$token = Get-Token

while ($true) {
    Send-Heartbeat -token $token -ip $ip
    Start-Sleep -Seconds 60
}