# Export firmware bins from PlatformIO build.
# Default: 2.8" (cyd_28r -> firmware/cyd_28r)
# 3.5":    .\firmware\export_from_build.ps1 -Env cyd_35r
#          (only after: pio run -e cyd_35r)

param(
  [switch]$SkipBuild,
  [ValidateSet("cyd_28r", "cyd_35r")]
  [string]$Env = "cyd_28r"
)

$ErrorActionPreference = "Stop"
$root = Split-Path -Parent (Split-Path -Parent $MyInvocation.MyCommand.Path)
Set-Location $root

$env:Path = "C:\Users\dsx2016\AppData\Local\Programs\Python\Python312\Scripts;" + $env:Path

if (-not $SkipBuild) {
  pio run -e $Env
  if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
}

$src = Join-Path $root (".pio\build\" + $Env)
if ($Env -eq "cyd_35r") {
  $dstName = "cyd_35r"
  $boardLine = "board: ESP32-3248S035 (ST7796 + GT911)"
  $boardIdHint = "esp32-3248s035"
} else {
  $dstName = "cyd_28r"
  $boardLine = "board: ESP32-2432S028R (ILI9341)"
  $boardIdHint = "esp32-2432s028"
}
$dst = Join-Path $root ("firmware\" + $dstName)
New-Item -ItemType Directory -Force -Path $dst | Out-Null

foreach ($f in @("bootloader.bin", "partitions.bin", "firmware.bin")) {
  $p = Join-Path $src $f
  if (-not (Test-Path $p)) { Write-Error "Missing build artifact: $p — build with: pio run -e $Env" }
  Copy-Item $p $dst -Force
}

$bootApp = Join-Path $env:USERPROFILE ".platformio\packages\framework-arduinoespressif32\tools\partitions\boot_app0.bin"
if (-not (Test-Path $bootApp)) {
  Write-Error "boot_app0.bin not found under PlatformIO packages"
}
Copy-Item $bootApp (Join-Path $dst "boot_app0.bin") -Force

$git = ""
try { $git = (git -C $root rev-parse --short HEAD).Trim() } catch { $git = "unknown" }
$date = Get-Date -Format "yyyy-MM-dd"
$hashes = Get-ChildItem (Join-Path $dst "*.bin") | Get-FileHash -Algorithm SHA256
$lines = @(
  "name: CYD ld2420test ($dstName)",
  "git: $git",
  "date: $date",
  $boardLine,
  "flash_size: 4MB",
  "offsets:",
  "  0x1000  bootloader.bin",
  "  0x8000  partitions.bin",
  "  0xe000  boot_app0.bin",
  "  0x10000 firmware.bin",
  "sha256:"
)
foreach ($h in $hashes) {
  $lines += ("  {0,-15} {1}" -f (Split-Path $h.Path -Leaf), $h.Hash)
}
$lines | Set-Content -Encoding utf8 (Join-Path $dst "VERSION.txt")


Write-Host "Exported -> $dst (env=$Env git=$git)"