# E07-S02 integration checks for scripts/launch-editor.ps1 and
# scripts/launch-compiler.ps1.
[CmdletBinding()]
param()

$ErrorActionPreference = "Stop"

$project = Split-Path (Split-Path $PSScriptRoot -Parent) -Parent
$repository = Split-Path $project -Parent
$launchEditor = Join-Path $project "scripts\launch-editor.ps1"
$launchCompiler = Join-Path $project "scripts\launch-compiler.ps1"
$modulePath = Join-Path $project "scripts\lib\Nova128Launcher.psm1"
$source = Join-Path $repository "vim\vim-improved.d81"
$minimal = Join-Path $project "build\minimal.prg"
$testRoot = Join-Path $project "build\launcher-test"
$diskA = Join-Path $testRoot "editor.d81"
$diskB = Join-Path $testRoot "compiler.d81"
$editorShot = Join-Path $testRoot "editor.png"
$compilerShot = Join-Path $testRoot "compiler.png"

foreach ($path in @($launchEditor, $launchCompiler, $modulePath)) {
    if (-not (Test-Path -LiteralPath $path -PathType Leaf)) { throw "missing $path" }
}
if (-not (Test-Path -LiteralPath $source -PathType Leaf)) { throw "source image missing: $source" }

New-Item -ItemType Directory -Force -Path $testRoot | Out-Null
& (Join-Path $project "scripts\build-minimal.ps1") | Out-Host
if (-not (Test-Path -LiteralPath $minimal -PathType Leaf)) { throw "minimal PRG missing" }

Import-Module $modulePath -Force

function Assert-FailsWith {
    param(
        [Parameter(Mandatory = $true)][scriptblock]$Action,
        [Parameter(Mandatory = $true)][string]$Pattern
    )
    $caught = $null
    try { & $Action } catch { $caught = $_.Exception.Message }
    if ($null -eq $caught) { throw "expected failure matching '$Pattern', but it succeeded" }
    if ($caught -notmatch $Pattern) { throw "failure '$caught' did not match '$Pattern'" }
}

$sourceHashBefore = (Get-FileHash -LiteralPath $source -Algorithm SHA256).Hash

# 1: missing inputs are reported before any emulator starts.
Assert-FailsWith -Pattern 'editor program not found' -Action {
    & $launchEditor -EditorPrg (Join-Path $testRoot "missing.prg") `
        -SourceImage $source -DiskImage $diskA
}
Assert-FailsWith -Pattern 'compiler program not found' -Action {
    & $launchCompiler -CompilerPrg (Join-Path $testRoot "missing.prg") `
        -DiskImage $diskB -SkipPrepare
}

# 2: an editor session owns the image for the duration; a live lock blocks the
# compiler launcher on the same folder.
Copy-Item -LiteralPath $source -Destination $diskA -Force
$held = Enter-Nova128ImageSession -Image $diskA -Kind "editor"
try {
    Assert-FailsWith -Pattern 'still owns|already holds' -Action {
        & $launchCompiler -CompilerPrg $minimal -DiskImage $diskA -SkipPrepare
    }
} finally {
    Exit-Nova128ImageSession -Session $held
}
if (Test-Path -LiteralPath (Join-Path $testRoot ".newlang-session.lock")) {
    throw "the session lock was not released"
}

# 3: flush waiting refuses a locked image and accepts a released one.
$partner = [IO.File]::Open($diskA, [IO.FileMode]::Open, [IO.FileAccess]::Read, [IO.FileShare]::None)
try {
    Assert-FailsWith -Pattern 'still locked' -Action {
        Wait-Nova128ImageFlush -Image $diskA -TimeoutSeconds 1
    }
} finally {
    $partner.Dispose()
}
Wait-Nova128ImageFlush -Image $diskA -TimeoutSeconds 2

# 4: the editor launcher autostarts its program in x64sc on a fresh copy and
# returns only after the process exits and the image flushes.
& $launchEditor -EditorPrg $minimal -SourceImage $source -DiskImage $diskA `
    -LimitCycles 2000000 -Screenshot $editorShot -Warp
if (-not (Test-Path -LiteralPath $editorShot)) { throw "editor launcher produced no screenshot" }
$editorListing = (& "C:\Program Files\GTK3VICE-3.10-win64\bin\c1541.exe" $diskA -list 2>&1) -join "`n"
if ($editorListing -notmatch '(?im)"vim128"\s+prg') {
    throw "the editor launcher did not put vim128 on the session disk"
}

# 5: the compiler launcher autostarts its program in x128 and leaves the
# disposable image flushed and unlocked.
Copy-Item -LiteralPath $source -Destination $diskB -Force
& $launchCompiler -CompilerPrg $minimal -DiskImage $diskB -LimitCycles 2000000 `
    -Screenshot $compilerShot -Warp -SkipPrepare
if (-not (Test-Path -LiteralPath $compilerShot)) { throw "compiler launcher produced no screenshot" }
Wait-Nova128ImageFlush -Image $diskB -TimeoutSeconds 2

$sourceHashAfter = (Get-FileHash -LiteralPath $source -Algorithm SHA256).Hash
if ($sourceHashAfter -ne $sourceHashBefore) { throw "the Vim source image changed during the session tests" }

Write-Host "launcher tests passed"
Write-Host "editor disk copy (vim128 injected), lock refusal, flush wait, x128 editor and compiler autostart"
Write-Host "source disk unchanged: $sourceHashAfter"