[CmdletBinding()]
param(
    [Parameter(Mandatory = $true)]
    [ValidatePattern('^[a-z0-9][a-z0-9-]*$')]
    [string]$RepositoryId,

    [Parameter(Mandatory = $true)]
    [string]$InputFolder,

    [ValidateSet('Preview', 'Normal', 'High')]
    [string]$Detail = 'Normal',

    [switch]$ValidateOnly
)

$ErrorActionPreference = 'Stop'

$realityCapture = 'C:\Program Files\Capturing Reality\RealityCapture\RealityCapture.exe'
$scriptRoot = Split-Path -Parent $PSScriptRoot
$outputRoot = Join-Path $scriptRoot 'Output'
$repositoryOutput = Join-Path $outputRoot $RepositoryId
$projectFile = Join-Path $repositoryOutput ($RepositoryId + '.rcproj')
$modelFile = Join-Path $repositoryOutput ($RepositoryId + '.fbx')

if (-not (Test-Path -LiteralPath $realityCapture -PathType Leaf)) {
    throw "RealityCapture 1.5 executable not found at $realityCapture"
}
if (-not (Test-Path -LiteralPath $InputFolder -PathType Container)) {
    throw "Capture folder not found: $InputFolder"
}

$imageExtensions = @('.jpg', '.jpeg', '.png', '.tif', '.tiff', '.webp')
$images = @(Get-ChildItem -LiteralPath $InputFolder -File -Recurse | Where-Object {
    $imageExtensions -contains $_.Extension.ToLowerInvariant()
})
if ($images.Count -lt 3) {
    throw "RealityCapture needs at least 3 overlapping image files; found $($images.Count) in $InputFolder"
}

New-Item -ItemType Directory -Path $repositoryOutput -Force | Out-Null

if ($ValidateOnly) {
    Write-Output "RealityCapture input PASS: $($images.Count) image files for $RepositoryId"
    exit 0
}

$modelCommand = switch ($Detail) {
    'Preview' { '-calculatePreviewModel' }
    'High' { '-calculateHighModel' }
    default { '-calculateNormalModel' }
}

$arguments = @(
    '-newScene',
    '-addFolder', $InputFolder,
    '-align',
    '-selectMaximalComponent',
    '-setReconstructionRegionAuto',
    $modelCommand,
    '-calculateTexture',
    '-exportSelectedModel', $modelFile,
    '-save', $projectFile,
    '-quit'
)

Write-Output "Starting RealityCapture 1.5 reconstruction for $RepositoryId with $($images.Count) images..."
& $realityCapture @arguments
if ($LASTEXITCODE -ne 0) {
    throw "RealityCapture exited with code $LASTEXITCODE"
}
if (-not (Test-Path -LiteralPath $modelFile -PathType Leaf)) {
    throw "RealityCapture completed without producing $modelFile"
}

Write-Output "Reality scene ready: $modelFile"