param(
    [ValidateSet("Release", "Debug", "Fast")]
    [string]$Mode = "Fast",

    [string[]]$Include = @(),
    [string[]]$Define = @(),
    [string[]]$Source = @(),
    [string[]]$Header = @(),
    [string[]]$Option = @(),
    [string]$Output,
    [string]$ObjectDir = "./build"
)

New-Item -ItemType Directory -Force $ObjectDir | Out-Null

if ($Source.Count -gt 1) {
    $unitySource = Join-Path $ObjectDir "unity.cc"

    $unityLines = @()

    foreach ($src in $Source) {
        if (-not $src) { continue }

        $full = (Resolve-Path $src).Path
        $includePath = $full.Replace('\', '/').Replace('"', '\"')

        $unityLines += "#include `"$includePath`""
    }

    Set-Content -Path $unitySource -Value $unityLines -Encoding UTF8

    $Source = @($unitySource)
}

$includeFlags = foreach ($item in $Include) {
    if ($item) { "-I$item" }
}

$defineFlags = foreach ($item in $Define) {
    if ($item) { "-D$item" }
}

if ($IsWindows) {
    $modeFlags = switch ($Mode) {
        "Debug"   { @("/Ob0", "/Od", "-MDd", "-RTC1", "-Zi", "/FS") }
        "Fast"    { @("/Od", "/Ob0", "-MD") }
        "Release" { @("/O2", "-MD", "-DNDEBUG") }
    }

    $linkLibraries = @(
        "user32.lib"
        "XInput.lib",
        "BCrypt.lib",
        "ole32.lib"
    )

    cl /nologo /MP /TP /std:c++latest `
        -IC:\VulkanSDK\1.4.341.1\Include\ `
        $includeFlags `
        $defineFlags `
        $modeFlags `
        /Zc:preprocessor /arch:AVX2 /EHs- /EHc- /GR- /Zc:threadSafeInit- `
        /Fe:$Output `
        /Fo:$ObjectDir/ `
        /Fd:$ObjectDir/ `
        $Option `
        $Source `
        /link $linkLibraries

    exit $LASTEXITCODE
} else {
    $modeFlags = switch ($Mode) {
        "Debug"   { @("-O0", "-g") }
        "Fast"    { @("-O0", "-g0") }
        "Release" { @("-O2", "-DNDEBUG") }
    }

    $linkLibraries = @(
        "-lm",
        "-pthread",
        "-lxcb",
        "-lxcb-errors",
        "-lxcb-util",
        "-lxcb-xkb",
        "-lxkbcommon",
        "-lxkbcommon-x11",
        "-lxcb-xinput",
        "-lxcb-randr"
    )
    
    g++ -x c++ -std=c++23 `
        $includeFlags `
        $defineFlags `
        $modeFlags `
        -fno-asynchronous-unwind-tables `
        -fno-exceptions `
        -fno-unwind-tables `
        -fno-strict-aliasing `
        -fvisibility=hidden `
        -mavx2 `
        -fno-rtti `
        -fno-threadsafe-statics `
        $Option `
        $Source `
        -o $Output `
        -nostdlib++ `
        $linkLibraries

    exit $LASTEXITCODE
}