# Spine resource data generation script
# Scans assets/spine/ directory and generates:
#   generated/spine_assets.js  - resource name list
#   generated/spine_data.js    - .json/.atlas text content embedded (file:// CORS fix)

$ErrorActionPreference = "Stop"

$scriptDir   = Split-Path -Parent $MyInvocation.MyCommand.Path
$projectDir  = Split-Path -Parent $scriptDir
$spineDir    = Join-Path $projectDir "assets\spine"
$outDir      = Join-Path $projectDir "generated"
$assetsOut   = Join-Path $outDir "spine_assets.js"
$dataOut     = Join-Path $outDir "spine_data.js"

if (-not (Test-Path $outDir)) {
    New-Item -ItemType Directory -Path $outDir | Out-Null
}

if (-not (Test-Path $spineDir)) {
    Write-Host "[WARN] Spine assets directory not found: $spineDir — generating empty files" -ForegroundColor Yellow
    $jsonFiles = @()
} else {
    $jsonFiles = Get-ChildItem $spineDir -Filter "*.json" | Sort-Object Name
}

if ($jsonFiles.Count -eq 0) {
    Write-Host "[INFO] No .json files found — generating empty placeholder files" -ForegroundColor Yellow

    $utf8NoBom = New-Object System.Text.UTF8Encoding($false)
    [System.IO.File]::WriteAllText($assetsOut, "// Spine resource list (auto-generated, do not edit manually)`ngameabc_face.spineAssets = [];`n", $utf8NoBom)
    [System.IO.File]::WriteAllText($dataOut, "// Spine text data (auto-generated, do not edit manually)`ngameabc_face.spineTextData = {};`n", $utf8NoBom)

    Write-Host "[OK] $assetsOut (empty)" -ForegroundColor Green
    Write-Host "[OK] $dataOut (empty)" -ForegroundColor Green
    exit 0
}

$names = @()
foreach ($f in $jsonFiles) {
    $names += $f.BaseName
}

Write-Host "Found $($names.Count) Spine resource(s): $($names -join ', ')" -ForegroundColor Cyan

# ==================== spine_assets.js ====================
$assetsSB = [System.Text.StringBuilder]::new()
[void]$assetsSB.AppendLine('// Spine resource list (auto-generated, do not edit manually)')
[void]$assetsSB.Append('gameabc_face.spineAssets = [')

for ($i = 0; $i -lt $names.Count; $i++) {
    if ($i -gt 0) { [void]$assetsSB.Append(',') }
    [void]$assetsSB.AppendLine('')
    [void]$assetsSB.Append("`t`"$($names[$i])`"")
}

[void]$assetsSB.AppendLine('')
[void]$assetsSB.AppendLine('];')

$utf8NoBom = New-Object System.Text.UTF8Encoding($false)
[System.IO.File]::WriteAllText($assetsOut, $assetsSB.ToString(), $utf8NoBom)
Write-Host "[OK] $assetsOut" -ForegroundColor Green

# ==================== spine_data.js ====================
$dataSB = [System.Text.StringBuilder]::new()
[void]$dataSB.AppendLine('// Spine text data (auto-generated, do not edit manually)')
[void]$dataSB.AppendLine('// Embeds .json/.atlas content into JS to bypass file:// XHR CORS')
[void]$dataSB.AppendLine('gameabc_face.spineTextData = {};')

$totalOriginal = 0

foreach ($name in $names) {
    foreach ($ext in '.json', '.atlas') {
        $filePath = Join-Path $spineDir "$name$ext"
        if (-not (Test-Path $filePath)) {
            Write-Host "[WARN] Missing file: $name$ext" -ForegroundColor Yellow
            continue
        }

        $raw = [System.IO.File]::ReadAllText($filePath, [System.Text.Encoding]::UTF8)
        $totalOriginal += (Get-Item $filePath).Length

        $escaped = $raw.Replace('\', '\\').Replace("'", "\'")
        $escaped = $escaped.Replace("`r`n", '\n').Replace("`n", '\n').Replace("`r", '')

        [void]$dataSB.AppendLine("gameabc_face.spineTextData['$name$ext'] = '$escaped';")
    }
}

[System.IO.File]::WriteAllText($dataOut, $dataSB.ToString(), $utf8NoBom)

$dataSize = (Get-Item $dataOut).Length
$overhead = $dataSize - $totalOriginal

Write-Host "[OK] $dataOut" -ForegroundColor Green
Write-Host ''
Write-Host '=== Summary ===' -ForegroundColor Cyan
Write-Host "  Resources:     $($names.Count)"
Write-Host "  Original size: $([math]::Round($totalOriginal/1024, 1)) KB"
Write-Host "  Output size:   $([math]::Round($dataSize/1024, 1)) KB (overhead: $overhead bytes)"