# Build script for libghostty-vt WASM (PowerShell)
# Run this script after installing Zig

param(
    [string]$OutputDir = "src\frontend"
)

$ErrorActionPreference = "Stop"

Write-Host "============================================" -ForegroundColor Cyan
Write-Host "  Building libghostty-vt WebAssembly" -ForegroundColor Cyan
Write-Host "============================================" -ForegroundColor Cyan
Write-Host ""

# Check Zig installation
$zig = Get-Command zig -ErrorAction SilentlyContinue
if (-not $zig) {
    Write-Host "ERROR: Zig not found. Please install Zig 0.13.0+" -ForegroundColor Red
    Write-Host "Download: https://ziglang.org/download/" -ForegroundColor Yellow
    exit 1
}

$zigVersion = zig version
Write-Host "Zig version: $zigVersion"
Write-Host ""

$SCRIPT_DIR = Split-Path -Parent $MyInvocation.MyCommand.Path
if (-not $SCRIPT_DIR) { $SCRIPT_DIR = Get-Location }
$GHOSTTY_DIR = Join-Path $SCRIPT_DIR "lib\ghostty"
$OUTPUT_DIR = Join-Path $SCRIPT_DIR $OutputDir

# Create output directory
New-Item -ItemType Directory -Force -Path $OUTPUT_DIR | Out-Null

# Navigate to ghostty
Set-Location $GHOSTTY_DIR

Write-Host "Building libghostty-vt WASM..." -ForegroundColor Yellow
Write-Host ""

# Build WASM module
zig build lib-vt -Dtarget=wasm32-freestanding -Doptimize=ReleaseSmall -Dwasm_shared=false

# Find and copy WASM output
$wasmFiles = Get-ChildItem -Path "zig-out" -Recurse -Filter "*.wasm" -ErrorAction SilentlyContinue

if ($wasmFiles) {
    $wasmOutput = $wasmFiles[0].FullName
    Copy-Item $wasmOutput (Join-Path $OUTPUT_DIR "ghostty-vt.wasm") -Force
    
    Write-Host ""
    Write-Host "============================================" -ForegroundColor Green
    Write-Host "  SUCCESS!" -ForegroundColor Green
    Write-Host "============================================" -ForegroundColor Green
    Write-Host "WASM file: $(Join-Path $OUTPUT_DIR 'ghostty-vt.wasm')"
    Write-Host ""
    Write-Host "To run the terminal:" -ForegroundColor Cyan
    Write-Host "  cd ghostty-web; npm start" -ForegroundColor White
    Write-Host ""
} else {
    Write-Host ""
    Write-Host "WARNING: WASM build succeeded but output not found" -ForegroundColor Yellow
    Write-Host "Check: $GHOSTTY_DIR\zig-out\" -ForegroundColor Yellow
}