[CmdletBinding()]
param(
    [string]$UnityProjectRoot
)

$ErrorActionPreference = 'Stop'

$packageRoot = (Resolve-Path -LiteralPath (Join-Path $PSScriptRoot '../..')).Path
if (-not $UnityProjectRoot) {
    $UnityProjectRoot = Join-Path $packageRoot 'Development~/UnityProject'
}

$resolvedUnityProjectRoot = (Resolve-Path -LiteralPath $UnityProjectRoot).Path
$fixtureProject = Join-Path $PSScriptRoot 'ShrinkModFixtureBuilder.csproj'
$fixtureOutputRoot = Join-Path $resolvedUnityProjectRoot 'Temp/ShrinkModFixtureBuilder'
$fixtureTargetRoot = Join-Path $packageRoot 'Tests/Fixtures'
$runtimeAssemblyPath = Join-Path $resolvedUnityProjectRoot 'Temp/Bin/Debug/ShrinkModFramework.Runtime/ShrinkModFramework.Runtime.dll'

if (-not (Test-Path -LiteralPath $runtimeAssemblyPath)) {
    throw "ShrinkModFramework.Runtime.dll was not found. Compile the Unity development host first: $resolvedUnityProjectRoot"
}

foreach ($variant in 'V1', 'V2', 'V3') {
    $outputDirectory = Join-Path $fixtureOutputRoot $variant
    $intermediateDirectory = Join-Path $fixtureOutputRoot "obj/$variant/"
    dotnet build $fixtureProject /m:1 --nologo `
        -p:FixtureVariant=$variant `
        -p:RuntimeAssemblyPath=$runtimeAssemblyPath `
        -p:BaseIntermediateOutputPath=$intermediateDirectory `
        -p:OutputPath=$outputDirectory
    if ($LASTEXITCODE -ne 0) {
        throw "External fixture $variant build failed with exit code $LASTEXITCODE."
    }

    $source = Join-Path $outputDirectory 'ExternalFixture.Mod.dll'
    $targetName = switch ($variant) {
        'V1' { 'ExternalFixture.Mod.V1.dll.bytes' }
        'V2' { 'ExternalFixture.Mod.V2.Failing.dll.bytes' }
        'V3' { 'ExternalFixture.Mod.V3.dll.bytes' }
    }
    Copy-Item -LiteralPath $source -Destination (Join-Path $fixtureTargetRoot $targetName) -Force
}

Write-Host 'ShrinkModFramework external fixture DLLs rebuilt.'