[CmdletBinding()]
param(
    [string]$OutputPath = ".\assets\MrTrust.ico"
)

$ErrorActionPreference = "Stop"

function Resolve-FullPath {
    param([Parameter(Mandatory)][string]$Path)

    $executionContext.SessionState.Path.GetUnresolvedProviderPathFromPSPath($Path)
}

Add-Type -AssemblyName System.Drawing

$resolvedOutputPath = Resolve-FullPath $OutputPath
$outputDirectory = Split-Path -Parent $resolvedOutputPath
New-Item -ItemType Directory -Force -Path $outputDirectory | Out-Null

$bitmap = [Drawing.Bitmap]::new(64, 64)
$graphics = [Drawing.Graphics]::FromImage($bitmap)
$graphics.SmoothingMode = [Drawing.Drawing2D.SmoothingMode]::AntiAlias
$graphics.Clear([Drawing.Color]::Transparent)

$backgroundBrush = [Drawing.SolidBrush]::new([Drawing.Color]::FromArgb(27, 32, 35))
$accentBrush = [Drawing.SolidBrush]::new([Drawing.Color]::FromArgb(28, 185, 111))
$lightBrush = [Drawing.SolidBrush]::new([Drawing.Color]::FromArgb(225, 231, 227))
$shadowBrush = [Drawing.SolidBrush]::new([Drawing.Color]::FromArgb(70, 0, 0, 0))
$outlinePen = [Drawing.Pen]::new([Drawing.Color]::FromArgb(71, 84, 90), 3)

$graphics.FillRectangle($shadowBrush, 9, 10, 48, 48)
$graphics.FillRectangle($backgroundBrush, 7, 7, 48, 48)
$graphics.DrawRectangle($outlinePen, 7, 7, 48, 48)
$graphics.FillRectangle($accentBrush, 13, 13, 12, 36)
$graphics.FillRectangle($accentBrush, 13, 13, 30, 12)
$graphics.FillRectangle($lightBrush, 31, 29, 14, 20)

$font = [Drawing.Font]::new("Segoe UI", 18, [Drawing.FontStyle]::Bold, [Drawing.GraphicsUnit]::Pixel)
$graphics.DrawString("T", $font, $lightBrush, 32, 27)

$handle = $bitmap.GetHicon()
$icon = [Drawing.Icon]::FromHandle($handle)
$stream = [IO.File]::Open($resolvedOutputPath, [IO.FileMode]::Create)
try {
    $icon.Save($stream)
}
finally {
    $stream.Dispose()
    $icon.Dispose()
    $font.Dispose()
    $outlinePen.Dispose()
    $shadowBrush.Dispose()
    $lightBrush.Dispose()
    $accentBrush.Dispose()
    $backgroundBrush.Dispose()
    $graphics.Dispose()
    $bitmap.Dispose()
}

Write-Host "Created icon:"
Write-Host "  $resolvedOutputPath"