$ErrorActionPreference = 'Stop'
$root = Split-Path -Parent $PSScriptRoot
$work = Join-Path $root ('temp\campaign-flow-' + [guid]::NewGuid().ToString('N'))
$templateRoot = Join-Path $work 'templates'
$assets = Join-Path $templateRoot 'images'
$dbPath = Join-Path $work 'test.mdb'
$configPath = Join-Path $work 'test.ini'
$requestPath = Join-Path $work 'request.json'
$templatePath = Join-Path $templateRoot 'offer.html'
$imagePath = Join-Path $assets 'logo.png'
$pickup = Join-Path $work 'pickup'
$scriptHost = Join-Path $env:SystemRoot 'SysWOW64\cscript.exe'
$powerShellX86 = Join-Path $env:SystemRoot 'SysWOW64\WindowsPowerShell\v1.0\powershell.exe'

function Save-Request($Object) {
    $Object | ConvertTo-Json -Compress | Set-Content -LiteralPath $requestPath -Encoding UTF8
}
function Expect-Failure([string]$ScriptPath, [string[]]$Arguments) {
    $ErrorActionPreference = 'Continue'
    $null = & $powerShellX86 -NoProfile -ExecutionPolicy Bypass -File $ScriptPath @Arguments 2>$null
    $failed = $LASTEXITCODE -ne 0
    $ErrorActionPreference = 'Stop'
    if (-not $failed) { throw "Expected failure from $ScriptPath" }
}

try {
    $null = New-Item -ItemType Directory -Path $assets -Force
    $null = New-Item -ItemType Directory -Path $pickup -Force
    $example = Get-Content -LiteralPath (Join-Path $root 'config.example.ini') -Raw
    $example.Replace('DB_PATH=data/MassMailer.mdb', ('DB_PATH=' + $dbPath)).Replace(
        'TEMPLATE_ROOT=templates', ('TEMPLATE_ROOT=' + $templateRoot)).Replace(
        'SMTP_TEST_TO=', 'SMTP_TEST_TO=owner@example.invalid').Replace(
        'BUSINESS_POSTAL_ADDRESS=', 'BUSINESS_POSTAL_ADDRESS=123 Example Street, Test City, NY 10001') |
        Set-Content -LiteralPath $configPath -Encoding UTF8
    & $scriptHost //nologo (Join-Path $PSScriptRoot 'init-db.vbs') $configPath
    if ($LASTEXITCODE -ne 0) { throw 'MDB initialization failed' }
    & $powerShellX86 -NoProfile -ExecutionPolicy Bypass -File (Join-Path $PSScriptRoot 'test-campaign-db.ps1') -ConfigPath $configPath -Mode Seed
    if ($LASTEXITCODE -ne 0) { throw 'Contact fixture failed' }

    [System.IO.File]::WriteAllBytes($imagePath, [Convert]::FromBase64String(
        'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mP8/x8AAwMCAO+jRZkAAAAASUVORK5CYII='))
    [System.IO.File]::WriteAllText($templatePath,
        '<html><body><h1>Postcard offer</h1><img src="images/logo.png" alt="Logo" /></body></html>',
        [System.Text.Encoding]::UTF8)
    & $powerShellX86 -NoProfile -ExecutionPolicy Bypass -File (Join-Path $PSScriptRoot 'import-template.ps1') -Path $templatePath -ConfigPath $configPath
    if ($LASTEXITCODE -ne 0) { throw 'Template fixture failed' }
    $request = @{ Name = 'Autumn postcard'; Subject = 'Advertising on our postcard';
        TemplateId = 1; ReviewToken = ''; TestReceived = $false }
    Save-Request $request
    $review = (& $powerShellX86 -NoProfile -ExecutionPolicy Bypass -File (Join-Path $PSScriptRoot 'review-campaign.ps1') -RequestPath $requestPath -ConfigPath $configPath -OutputRoot (Join-Path $work 'previews')) | ConvertFrom-Json
    if ($LASTEXITCODE -ne 0 -or $review.Count -ne 2 -or -not (Test-Path -LiteralPath $review.PreviewPath)) {
        throw 'Campaign review count or preview failed'
    }
    $previewHtml = Get-Content -LiteralPath $review.PreviewPath -Raw
    if ($previewHtml -notmatch '123 Example Street' -or $previewHtml -notmatch 'UNSUBSCRIBE' -or
        $previewHtml -notmatch 'image-1.png') { throw 'Full preview is missing footer or image' }
    $request.ReviewToken = $review.Token
    Save-Request $request
    Expect-Failure (Join-Path $PSScriptRoot 'approve-campaign.ps1') @('-RequestPath',$requestPath,'-ConfigPath',$configPath)
    & $powerShellX86 -NoProfile -ExecutionPolicy Bypass -File (Join-Path $PSScriptRoot 'test-campaign-db.ps1') -ConfigPath $configPath -Mode SuppressSecond
    if ($LASTEXITCODE -ne 0) { throw 'Suppression fixture failed' }
    Expect-Failure (Join-Path $PSScriptRoot 'send-campaign-test.ps1') @('-RequestPath',$requestPath,'-ConfigPath',$configPath,'-PickupDirectory',$pickup)
    $review = (& $powerShellX86 -NoProfile -ExecutionPolicy Bypass -File (Join-Path $PSScriptRoot 'review-campaign.ps1') -RequestPath $requestPath -ConfigPath $configPath -OutputRoot (Join-Path $work 'previews')) | ConvertFrom-Json
    if ($LASTEXITCODE -ne 0 -or $review.Count -ne 1 -or $review.Token -eq $request.ReviewToken) {
        throw 'Suppression did not invalidate the review token'
    }
    $request.ReviewToken = $review.Token
    Save-Request $request
    & $powerShellX86 -NoProfile -ExecutionPolicy Bypass -File (Join-Path $PSScriptRoot 'send-campaign-test.ps1') -RequestPath $requestPath -ConfigPath $configPath -PickupDirectory $pickup
    if ($LASTEXITCODE -ne 0) { throw 'Internal campaign pickup test failed' }
    $messages = @(Get-ChildItem -LiteralPath $pickup -Filter '*.eml' -File)
    if ($messages.Count -ne 1) { throw 'Expected exactly one internal test MIME message' }
    $mime = Get-Content -LiteralPath $messages[0].FullName -Raw
    if ($mime -notmatch 'multipart/related' -or $mime -notmatch 'Content-ID:' -or
        $mime -notmatch 'owner@example.invalid' -or $mime -match 'one@example.invalid|two@example.invalid') {
        throw 'Internal test MIME has wrong recipient or inline image'
    }
    $request.TestReceived = $true
    Save-Request $request
    & $powerShellX86 -NoProfile -ExecutionPolicy Bypass -File (Join-Path $PSScriptRoot 'approve-campaign.ps1') -RequestPath $requestPath -ConfigPath $configPath
    if ($LASTEXITCODE -ne 0) { throw 'Campaign approval failed' }
    & $powerShellX86 -NoProfile -ExecutionPolicy Bypass -File (Join-Path $PSScriptRoot 'test-campaign-db.ps1') -ConfigPath $configPath -Mode Check
    if ($LASTEXITCODE -ne 0) { throw 'Campaign delivery state failed' }
    Expect-Failure (Join-Path $PSScriptRoot 'approve-campaign.ps1') @('-RequestPath',$requestPath,'-ConfigPath',$configPath)
    Write-Output 'Campaign review, stale-review rejection, internal-only MIME, and paused approval passed'
}
finally {
    $resolvedWork = [System.IO.Path]::GetFullPath($work)
    $resolvedTemp = [System.IO.Path]::GetFullPath((Join-Path $root 'temp'))
    if ($resolvedWork.StartsWith($resolvedTemp + [System.IO.Path]::DirectorySeparatorChar,
        [StringComparison]::OrdinalIgnoreCase) -and (Test-Path -LiteralPath $resolvedWork)) {
        Remove-Item -LiteralPath $resolvedWork -Recurse -Force
    }
}