# E04-S05: compile HELLO.N8 in x128, extract the generated PRG, and run it in
# a second x128 session; the screen must show the source's string.
[CmdletBinding()]
param([int]$Port = 6548, [int]$TimeoutSeconds = 180)

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

$out = Join-Path $project "build\hello-test"
$disk = Join-Path $out "hello-test.d81"
$text = "HELLO FROM NOVA128"
$failures = @()

# ------------------------------------------------------- compile session
$session = Start-Nova128X128 -Autostart $disk -Drive8Image $disk -Port $Port `
    -Screenshot (Join-Path $out "hello-compile-vicii.png")
try {
    $mb = Wait-Nova128Mailbox $session -TimeoutSeconds $TimeoutSeconds
} finally {
    Stop-Nova128X128 $session
}
Write-Host ("mailbox: " + (($mb | ForEach-Object { $_.ToString('X2') }) -join ' '))

if ($mb[2] -ne 0x02) { $failures += ("producer $($mb[2]) expected 2 (compiler)") }
if ($mb[3] -ne 0xA5) {
    $failures += ("compiler status {0:X2} failed at stage {1}" -f $mb[3], $mb[4])
}
if ($mb[8] -ne 0) { $failures += "diagnostics present: $($mb[8]) (see HELLO.ERR)" }
if ($mb[9] -ne 1) { $failures += "captured $($mb[9]) string prints, expected 1" }
if ($mb[10] -ne 0) { $failures += "unsupported print flag set" }
if ($mb[11] -ne 18) { $failures += "captured $($mb[11]) string bytes, expected 18" }
if ($mb[12] -ne 0) { $failures += "output error $($mb[12])" }

# ------------------------------------------------- extract the generated PRG
$c1541 = Get-ViceTool "c1541"
$prg = Join-Path $out "hello.prg"
if (Test-Path -LiteralPath $prg) { Remove-Item -LiteralPath $prg -Force }
& $c1541 -attach $disk -read "hello.prg" $prg 2>&1 | Out-Null
if (-not (Test-Path -LiteralPath $prg)) {
    $failures += "HELLO.PRG was not written to the compile disk"
} else {
    $bytes = [IO.File]::ReadAllBytes($prg)
    if ($bytes.Length -lt 14 -or $bytes[0] -ne 0x01 -or $bytes[1] -ne 0x1C) {
        $failures += "HELLO.PRG does not load at `$1C01"
    }
}

# ----------------------------------------------------------- run the PRG
$hitRow = -1
if (-not $failures) {
    $session = Start-Nova128X128 -Autostart $prg -Port ($Port + 1) `
        -Screenshot (Join-Path $out "hello-run-vicii.png")
    try {
        $deadline = [DateTime]::UtcNow.AddSeconds(60)
        while ([DateTime]::UtcNow -lt $deadline) {
            Start-Sleep -Seconds 1
            try { $screenRam = Read-Nova128Memory $session 0x0400 1000 } catch { continue }
            for ($r = 0; $r -lt 25; $r++) {
                $chars = for ($c = 0; $c -lt 40; $c++) {
                    $code = $screenRam[$r * 40 + $c]
                    if ($code -le 0x1F) { [char]($code + 0x40) } elseif ($code -le 0x3F) { [char]$code } else { '?' }
                }
                if ((-join $chars) -match [regex]::Escape($text)) { $hitRow = $r; break }
            }
            if ($hitRow -ge 0) { break }
        }
    } finally {
        Stop-Nova128X128 $session
    }
    if ($hitRow -lt 0) { $failures += "the generated PRG never displayed '$text'" }
}

if ($failures) { throw ("hello verification failed:`n  " + ($failures -join "`n  ")) }
Write-Host ("compile: diagnostics 0, one 18-byte print, out_err 0; HELLO.PRG {0} bytes" -f (Get-Item $prg).Length)
Write-Host ("run: '$text' displayed on screen row $hitRow")
Write-Host "verified hello.n8 compiles to a PRG and the PRG runs in x128"