# Monitor and pairing script for LOGI K370 B
$deviceName = "LOGI K370 B"

# 1. 시스템에 등록된 LOGI K370 B 장치 조회
$devs = @(Get-PnpDevice -FriendlyName "*$deviceName*" -ErrorAction SilentlyContinue)

$hasConnected = $false
$connectedInstance = $null

foreach ($d in $devs) {
    $prop = Get-PnpDeviceProperty -InstanceId $d.InstanceId -KeyName "{83DA6326-97A6-4088-9453-A1923F573B29} 15" -ErrorAction SilentlyContinue
    $isConn = ($prop -and $prop.Data -eq $true)
    if ($isConn) {
        $hasConnected = $true
        $connectedInstance = $d
    }
}

function Format-Mac($raw) {
    $parts = @()
    for ($i = 0; $i -lt $raw.Length; $i += 2) {
        $parts += $raw.Substring($i, 2).ToLower()
    }
    return [string]::Join(":", $parts)
}

# 2. 이미 정상 연결된 경우 -> 과거 잔여 인스턴스가 있다면 정리하고 CONNECTED 반환
if ($hasConnected) {
    foreach ($d in $devs) {
        if ($d.InstanceId -ne $connectedInstance.InstanceId) {
            $addr = (Get-PnpDeviceProperty -InstanceId $d.InstanceId -KeyName "DEVPKEY_Bluetooth_DeviceAddress" -ErrorAction SilentlyContinue).Data
            if ($addr) {
                $fMac = Format-Mac $addr
                & .\btpair.exe unpair-by-mac --mac $fMac --type BluetoothLE | Out-Null
            }
        }
    }
    Write-Output "CONNECTED"
    exit 0
}

# 3. 연결 해제 상태: 과거 잔여 페어링 unpair 정리
foreach ($d in $devs) {
    $addr = (Get-PnpDeviceProperty -InstanceId $d.InstanceId -KeyName "DEVPKEY_Bluetooth_DeviceAddress" -ErrorAction SilentlyContinue).Data
    if ($addr) {
        $fMac = Format-Mac $addr
        Write-Output "[DEBUG] Unpairing stale instance: $fMac"
        & .\btpair.exe unpair-by-mac --mac $fMac --type BluetoothLE | Out-Null
    }
}

# 4. 실시간 BLE 광고 스캔 및 발견 즉시 자동 페어링 시도 (스캔 2초, PIN 입력 대기 45초)
$pairRes = & .\BlePairer.exe watch-and-pair 2 45

foreach ($outLine in $pairRes) {
    if ($outLine -match "Active advertisement detected|Device found|PairingRequested|SUCCESS|FAILED|Timeout|Exception") {
        Write-Output "[DEBUG] $outLine"
    }
    if ($outLine -match "PIN_CODE:(\d+)") {
        Write-Output "PIN_REQUIRED: $($Matches[1])"
    }
}

$allOut = $pairRes -join ' '
if ($allOut -match "SUCCESS") {
    Write-Output "PAIRED_AND_CONNECTED"
    exit 0
}

Write-Output "CLEANED_AND_WAITING"