# ==============================================================================
# F76.WORLD - Windows 1-Click Optimizer & INI Deployer (PowerShell)
# Target: Fallout 76 (Steam & PC Game Pass)
# Game Update: Patch 70 "The Slasher" (v1.7.26.13)
# ==============================================================================
param(
    [switch]$DryRun,
    [switch]$Apply
)

$Host.UI.RawUI.ForegroundColor = "Yellow"
Write-Host @"
  ███████╗███████╗ ██████╗     ██╗    ██╗ ██████╗ ██████╗ ██╗     ██████╗ 
  ██╔════╝╚════██║██╔════╝     ██║    ██║██╔═══██╗██╔══██╗██║     ██╔══██╗
  █████╗      ██╔╝███████╗     ██║ █╗ ██║██║   ██║██████╔╝██║     ██║  ██║
  ██╔══╝     ██╔╝ ██╔═══██╗    ██║███╗██║██║   ██║██╔══██╗██║     ██║  ██║
  ██║        ██║  ╚██████╔╝    ╚███╔███╔╝╚██████╔╝██║  ██║███████╗██████╔╝
  ╚═╝        ╚═╝   ╚═════╝      ╚══╝╚══╝  ╚═════╝ ╚═╝  ╚═╝╚══════╝╚═════╝ 
"@
$Host.UI.RawUI.ForegroundColor = "Cyan"
Write-Host "  Appalachia Windows 1-Click Deployer • Patch 70 Ready"
Write-Host "  Authoritative Webhook: https://f76.world`n"
$Host.UI.RawUI.ForegroundColor = "White"

# Target Directory Resolution
$docsPath = [Environment]::GetFolderPath([Environment+SpecialFolder]::MyDocuments)
$f76Dir = Join-Path $docsPath "My Games\Fallout 76"
$targetIni = Join-Path $f76Dir "Fallout76Custom.ini"

Write-Host "[*] Target Documents Directory: $f76Dir" -ForegroundColor DarkGray

# Interactive Prompt if executed without flags
if (-not $DryRun -and -not $Apply) {
    Write-Host "`nSelect execution mode:" -ForegroundColor Yellow
    Write-Host "  [1] Dry-Run / Test Safe Run (Inspect paths & diff, ZERO disk changes)" -ForegroundColor Green
    Write-Host "  [2] Apply Live Optimization (Backup existing INI & write new config)" -ForegroundColor Cyan
    $choice = Read-Host "Enter choice [1 or 2, default: 1]"
    if ($choice -ne "2") {
        $DryRun = $true
    }
}

$iniContent = @'
; ==============================================================================
; F76.WORLD OPTIMIZED PRESET - PATCH 70 (THE SLASHER) VERIFIED
; Engine Invariant: sResourceArchive2List handles client mods non-destructively
; ==============================================================================

[Display]
iPresentInterval = 0
bFull Screen = 0
bBorderless = 1
fSunUpdateThreshold = 0.5

[Controls]
fMouseHeadingXScale = .021
fMouseHeadingYScale = .021
bMouseAcceleration = 0
fPitchSpeed = 0.0000

[Interface]
fDefaultWorldFOV = 90.0
fDefault1stPersonFOV = 90.0
fSafeZoneX = 15.0
fSafeZoneY = 15.0
fSafeZoneXWide = 64.0
fSafeZoneXWide16x10 = 64.0
fSafeZoneYWide16x10 = 36.0

[General]
sIntroSequence = 
uMainMenuDelayBeforeAllowSkip = 0
bAlwaysActive = 1
uMainMenuMusicAttnmB = 800

[Grass]
iMinGrassSize = 40
bAllowCreateGrass = 1

[ImageSpace]
bMBEnable = 0
bDoRadialBlur = 0

[Pipboy]
fPipboyEffectColorR = 0.1000
fPipboyEffectColorG = 1.0000
fPipboyEffectColorB = 0.3000
fQuickboyEffectColorR = 0.1000
fQuickboyEffectColorG = 1.0000
fQuickboyEffectColorB = 0.3000

[Archive]
bInvalidateOlderFiles = 1
sResourceDataDirsFinal = 
sResourceArchive2List = SeventySix - StaticMeshes.ba2
'@

if ($DryRun) {
    Write-Host "`n[DRY-RUN / TEST SAFE RUN ACTIVE]" -ForegroundColor Cyan
    Write-Host "The following configuration WOULD be written to: $targetIni`n" -ForegroundColor DarkGray
    Write-Host "--- PROPOSED Fallout76Custom.ini ---" -ForegroundColor Green
    Write-Host $iniContent -ForegroundColor Gray
    Write-Host "-------------------------------------`n" -ForegroundColor Green
    if (Test-Path $targetIni) {
        $timestamp = Get-Date -Format "yyyyMMddHHmmss"
        Write-Host "[i] Existing INI detected. A backup would be created at: $targetIni.bak.$timestamp" -ForegroundColor Yellow
    } else {
        Write-Host "[i] No existing INI file found. File would be created fresh." -ForegroundColor Yellow
    }
    Write-Host "`n✔ Dry-run complete. ZERO files modified on disk." -ForegroundColor Green
    Write-Host "To apply these changes, run with: irm https://f76.world/win | iex -ArgumentList '-Apply'`n" -ForegroundColor Cyan
    return
}

# Live Apply
Write-Host "`n[⚡ APPLYING OPTIMIZATIONS LIVE]" -ForegroundColor Yellow
if (-not (Test-Path $f76Dir)) {
    New-Item -ItemType Directory -Path $f76Dir -Force | Out-Null
}

if (Test-Path $targetIni) {
    $timestamp = Get-Date -Format "yyyyMMddHHmmss"
    $backupPath = "$targetIni.bak.$timestamp"
    Copy-Item -Path $targetIni -Destination $backupPath -Force
    Write-Host "✔ Created safety backup: $backupPath" -ForegroundColor Green
}

[System.IO.File]::WriteAllText($targetIni, $iniContent, [System.Text.Encoding]::UTF8)

Write-Host "✔ Successfully installed optimized Fallout76Custom.ini!" -ForegroundColor Green
Write-Host "  Location: $targetIni" -ForegroundColor White
Write-Host "  Settings: 1:1 Mouse Fix • FPS Unlocked • Intro Skipped • FOV 90 • Safe sResourceArchive2List" -ForegroundColor DarkGray
Write-Host "`nLaunch Fallout 76 to enjoy buttery-smooth wasteland exploration!`n" -ForegroundColor Cyan