# Shared helpers for build/flash scripts.

# A mapped drive that points back to a share on this very PC (D: -> \\THISPC\Projects)
# makes every compiler launch go through SMB and antivirus scanning: builds
# get ~50x slower. Translate such paths to the local folder behind the share.
function Resolve-LocalPath([string]$Path) {
    $full = (Resolve-Path $Path).ProviderPath
    $drive = Get-PSDrive -Name $full.Substring(0, 1) -ErrorAction SilentlyContinue
    if ($drive -and $drive.DisplayRoot -match '^\\\\([^\\]+)\\([^\\]+)') {
        if ($Matches[1] -ieq $env:COMPUTERNAME) {
            $share = Get-CimInstance Win32_Share -Filter "Name='$($Matches[2])'" -ErrorAction SilentlyContinue
            if ($share) {
                return Join-Path $share.Path $full.Substring(3)
            }
        }
    }
    return $full
}

function Get-ProjectRoot {
    return Resolve-LocalPath (Join-Path $PSScriptRoot '..')
}

function Set-BuildEnv([string]$Root) {
    $sdk = Join-Path $Root 'third_party\bouffalo_sdk'
    $tc = Join-Path $Root 'third_party\toolchain_gcc_t-head_windows\bin'
    if (-not (Test-Path $sdk) -or -not (Test-Path $tc)) {
        throw "SDK/toolchain not found in $Root\third_party - run scripts\setup.ps1 first"
    }
    $env:BL_SDK_BASE = $sdk
    $env:PATH = "$tc;$sdk\tools\make;$sdk\tools\ninja;$sdk\tools\cmake\bin;$env:SystemRoot\System32;$env:SystemRoot"
}

# COM port name(s) of present devices whose instance id matches the pattern
function Find-ComPort([string]$IdPattern) {
    Get-CimInstance Win32_PnPEntity -Filter "PNPClass='Ports'" -ErrorAction SilentlyContinue |
        Where-Object { $_.PNPDeviceID -match $IdPattern -and $_.Name -match '\((COM\d+)\)' } |
        ForEach-Object { [regex]::Match($_.Name, '\((COM\d+)\)').Groups[1].Value }
}

$BootromPortId = 'VID_349B&PID_6160'      # BL616 ROM USB bootloader "Bouffalo CDC DEMO"
$FirmwarePortId = 'VID_1209&PID_C0CA&MI_01' # this firmware's CDC UART