# E02-S02: run the C128 lexer over every fixture in x128 and compare its token
# dump with tests/lexer/golden/*.tokens (which the host reference lexer must
# also reproduce; build-lexer-test.ps1 checks that first).
[CmdletBinding()]
param([int]$Port = 6532, [int]$TimeoutSeconds = 180)

$ErrorActionPreference = "Stop"
$project = Split-Path $PSScriptRoot -Parent
Import-Module (Join-Path $PSScriptRoot "lib\Nova128Test.psm1") -Force
. (Join-Path $project "tests\lexer\reference-lexer.ps1")
& (Join-Path $PSScriptRoot "build-lexer-test.ps1")

$out = Join-Path $project "build\lexer-test"
$disk = Join-Path $out "lexer-test.d81"
$screenshot = Join-Path $out "lexer-test-vicii.png"
$names = @("minimal", "decls", "arrays", "exprs", "forward", "nulls", "stmts",
    "tokens", "errors", "badchar")

$session = Start-Nova128X128 -Autostart $disk -Drive8Image $disk -Port $Port -Screenshot $screenshot
try {
    $mb = Wait-Nova128Mailbox $session -TimeoutSeconds $TimeoutSeconds
    $address = $mb[8] + 256 * $mb[9]
    $length = $mb[10] + 256 * $mb[11]
    $dump = Read-Nova128Memory $session $address $length
} finally {
    Stop-Nova128X128 $session
}
[IO.File]::WriteAllBytes((Join-Path $out "lexer-dump.bin"), $dump)

$fixtures = ConvertFrom-TokenDump $dump
$failures = @()
if ($mb[3] -ne 0xA5) { $failures += "C128 reported FAIL (code `$" + $mb[4].ToString("X2") + ")" }
if ($fixtures.Count -ne $names.Count) { $failures += "dump holds $($fixtures.Count) fixtures, expected $($names.Count)" }
for ($i = 0; $i -lt $names.Count; $i++) {
    $name = $names[$i]
    $golden = (Get-Content -LiteralPath (Join-Path $project "tests\lexer\golden\$name.tokens")) |
        Where-Object { $_ -ne "" }
    $entry = $fixtures[$i]
    if ($null -eq $entry) { $failures += "${name}: missing from dump"; continue }
    if ($entry.Load -ne 0) { $failures += "${name}: src_load returned $($entry.Load)"; continue }
    $got = @($entry.Tokens)
    $diff = Compare-Object -ReferenceObject $golden -DifferenceObject $got -SyncWindow 0
    if ($diff) {
        $first = 0
        while ($first -lt [Math]::Min($golden.Count, $got.Count) -and $golden[$first] -eq $got[$first]) { $first++ }
        $failures += ("{0}: token {1} differs: golden '{2}' vs C128 '{3}' ({4} vs {5} tokens)" -f
            $name, ($first + 1), $golden[$first], $got[$first], $golden.Count, $got.Count)
        Write-Host ("  {0,-8} {1,4} tokens  FAIL" -f $name, $got.Count)
    } else {
        Write-Host ("  {0,-8} {1,4} tokens  match" -f $name, $got.Count)
    }
}
if ($failures) { throw ("lexer verification failed:`n  " + ($failures -join "`n  ")) }
Write-Host ("verified C128 lexer: {0} fixtures, {1} dump bytes, all tokens match golden files" -f $names.Count, $length)
Write-Host "screenshot: $screenshot"