param(
    [string]$Hex = "build\merged.hex"
)

Set-StrictMode -Version Latest
$ErrorActionPreference = "Stop"

$RepoRoot = Split-Path -Parent $PSScriptRoot
$HexPath = Join-Path $RepoRoot $Hex

if (-not (Test-Path -LiteralPath $HexPath)) {
    throw "Hex file not found: $HexPath. Build the project first."
}

Write-Host "[FLASH] FULL ERASE mode"
Write-Host "[FLASH] This wipes application flash, NVS/settings, and BLE bonds."
Write-Host "[FLASH] Programming: $HexPath"

nrfjprog --program $HexPath --chiperase --verify --reset