param(
    [string]$LauncherPath = (Join-Path (Split-Path $PSScriptRoot -Parent) '..\Launcher'),
    [string]$BuildDirectory = (Join-Path (Split-Path $PSScriptRoot -Parent) 'build-nmake')
)

$ErrorActionPreference = 'Stop'
$root = Split-Path $PSScriptRoot -Parent
$launcherPath = [System.IO.Path]::GetFullPath($LauncherPath)
$buildDirectory = [System.IO.Path]::GetFullPath($BuildDirectory)

function Assert-Condition {
    param([bool]$Condition, [string]$Message)
    if (-not $Condition) {
        throw $Message
    }
}

function Read-FeatureKeys {
    param([string]$IniPath)

    $section = ''
    $keys = [System.Collections.Generic.List[string]]::new()
    foreach ($rawLine in Get-Content $IniPath) {
        $line = $rawLine.Trim()
        if ($line -match '^\[(.+)\]$') {
            $section = $Matches[1]
            continue
        }

        if ($section -ieq 'rem-essentials' -and $line -match '^([^;][^=]+?)\s*=') {
            $keys.Add($Matches[1].Trim())
        }
    }

    return $keys
}

function Normalize-IniText {
    param([string]$Text)
    return (($Text -replace "`r`n", "`n").TrimEnd()) + "`n"
}

$mainSource = Get-Content (Join-Path $root 'src\main.cpp') -Raw
$registeredKeys = [regex]::Matches($mainSource, 'manager\.Register\("([^"]+)"') |
    ForEach-Object { $_.Groups[1].Value }
$iniKeys = Read-FeatureKeys (Join-Path $root 'rem-essentials.ini')

$missingInIni = @($registeredKeys | Where-Object { $_ -notin $iniKeys })
$missingInCode = @($iniKeys | Where-Object { $_ -notin $registeredKeys })
Assert-Condition ($missingInIni.Count -eq 0) "Registered features missing from INI: $($missingInIni -join ', ')"
Assert-Condition ($missingInCode.Count -eq 0) "INI features missing from code: $($missingInCode -join ', ')"
Assert-Condition (($registeredKeys | Select-Object -Unique).Count -eq $registeredKeys.Count) 'Duplicate feature registrations found.'

$cmake = Get-Content (Join-Path $root 'CMakeLists.txt') -Raw
Assert-Condition ($cmake -notmatch '(?i)direct_?ips') 'direct_ips must not be compiled.'

$launcherServicePath = Join-Path $launcherPath 'RemLauncher.Core\Services\GameSettingsService.cs'
$launcherMainPath = Join-Path $launcherPath 'RemLauncher\MainWindow.xaml.cs'
$launcherHtmlPath = Join-Path $launcherPath 'web\templates\gamesettings.html'
Assert-Condition (Test-Path $launcherServicePath) "Launcher service not found at $launcherServicePath"

$launcherService = Get-Content $launcherServicePath -Raw
$rawIniMatch = [regex]::Match(
    $launcherService,
    'private const string DefaultRemEssentialsIni = """\r?\n(?<ini>.*?)\r?\n\s*""";',
    [System.Text.RegularExpressions.RegexOptions]::Singleline)
Assert-Condition $rawIniMatch.Success 'Could not extract the embedded launcher INI.'

$embeddedLines = $rawIniMatch.Groups['ini'].Value -split '\r?\n'
$embeddedIni = ($embeddedLines | ForEach-Object {
    if ($_.Length -ge 8) { $_.Substring(8) } else { '' }
}) -join "`n"
$sourceIni = Get-Content (Join-Path $root 'rem-essentials.ini') -Raw
Assert-Condition ((Normalize-IniText $embeddedIni) -ceq (Normalize-IniText $sourceIni)) 'Launcher and plugin default INIs differ.'

$launcherMain = Get-Content $launcherMainPath -Raw
$launcherHtml = Get-Content $launcherHtmlPath -Raw
Assert-Condition ($launcherMain -match 'PostMessage\(String\(message\)\);\s*return true;') 'CEF bridge does not report successful messages.'
Assert-Condition ($launcherHtml -match "postMessage\('getGameSettings'\) === false") 'Settings page does not handle bridge failure explicitly.'
Assert-Condition ($launcherMain -match 'ApplyRemEssentialsUserSettings\(\);\s*await _log\.AddLogAsync\("REM Essentials user settings applied after patching') 'Overrides are not applied after patching.'

$builtDll = Join-Path $buildDirectory 'bin\rem-essentials.dll'
$releaseDll = Join-Path $root 'release\rem-essentials.dll'
Assert-Condition (Test-Path $builtDll) "Built DLL not found at $builtDll"
Assert-Condition (Test-Path $releaseDll) "Release DLL not found at $releaseDll"

$bytes = [System.IO.File]::ReadAllBytes($builtDll)
Assert-Condition ($bytes.Length -gt 0x40 -and $bytes[0] -eq 0x4D -and $bytes[1] -eq 0x5A) 'Built DLL is not a PE file.'
$peOffset = [BitConverter]::ToInt32($bytes, 0x3C)
$machine = [BitConverter]::ToUInt16($bytes, $peOffset + 4)
Assert-Condition ($machine -eq 0x014C) ('Built DLL is not x86 (machine 0x{0:X4}).' -f $machine)

$builtHash = (Get-FileHash $builtDll -Algorithm SHA256).Hash
$releaseHash = (Get-FileHash $releaseDll -Algorithm SHA256).Hash
Assert-Condition ($builtHash -eq $releaseHash) 'Release DLL does not match the current build.'

Write-Host "Release validation passed: $($registeredKeys.Count) features, x86 DLL $builtHash"