# tools/extract-item-icons.ps1
# Crops the Tier-1 item icons out of art/Items.png into apps/web/public/images/items.
# Re-runnable: overwrites its own output and touches nothing else.
$ErrorActionPreference = 'Stop'
Add-Type -AssemblyName System.Drawing

$root = Split-Path -Parent $PSScriptRoot
$sheet = Join-Path $root 'art\Items.png'
$ratPortrait = Join-Path $root 'art\enemies\AschenratteIcon.png'
$outDir = Join-Path $root 'apps\web\public\images\items'
New-Item -ItemType Directory -Force -Path $outDir | Out-Null

function Export-Icon {
  param(
    [System.Drawing.Image] $Source,
    [int] $X, [int] $Y, [int] $Size,
    [string] $Key
  )
  $bitmap = New-Object System.Drawing.Bitmap 256, 256
  $graphics = [System.Drawing.Graphics]::FromImage($bitmap)
  $graphics.InterpolationMode = [System.Drawing.Drawing2D.InterpolationMode]::HighQualityBicubic
  $graphics.DrawImage(
    $Source,
    (New-Object System.Drawing.Rectangle 0, 0, 256, 256),
    (New-Object System.Drawing.Rectangle $X, $Y, $Size, $Size),
    [System.Drawing.GraphicsUnit]::Pixel)
  $graphics.Dispose()
  $bitmap.Save((Join-Path $outDir "$Key.png"), [System.Drawing.Imaging.ImageFormat]::Png)
  $bitmap.Dispose()
  Write-Host "wrote $Key.png"
}

$items = [System.Drawing.Image]::FromFile($sheet)
try {
  # Rows 1-2: cells are 350 wide with a caption strip at the bottom, so the
  # artwork is the 300x300 square inset by 25px horizontally.
  $columns = 8, 366, 724, 1082
  $rowOne = 'worn-short-sword', 'bandit-blade', 'ash-blade', 'bandit-hood'
  $rowTwo = 'reinforced-leather-jacket', 'raider-gloves', 'guardsman-legs', 'ash-boots'

  for ($i = 0; $i -lt 4; $i++) {
    Export-Icon -Source $items -X ($columns[$i] + 25) -Y 8   -Size 300 -Key $rowOne[$i]
    Export-Icon -Source $items -X ($columns[$i] + 25) -Y 364 -Size 300 -Key $rowTwo[$i]
  }

  # Row 3 is centred and shorter: three cells, 262x262 artwork inset by 44px.
  $rowThreeColumns = 191, 549, 907
  $rowThree = 'borderwatch-sigil', 'burned-captain-pendant', 'small-healing-potion'
  for ($i = 0; $i -lt 3; $i++) {
    Export-Icon -Source $items -X ($rowThreeColumns[$i] + 44) -Y 720 -Size 262 -Key $rowThree[$i]
  }
}
finally {
  $items.Dispose()
}

# STAND-IN ART: no Aschenfell artwork exists yet, so the pelt icon is a scorched
# hide patch cropped from the Aschenratte portrait. Replace when real art lands.
$rat = [System.Drawing.Image]::FromFile($ratPortrait)
try {
  Export-Icon -Source $rat -X 760 -Y 300 -Size 320 -Key 'ash-pelt'
}
finally {
  $rat.Dispose()
}