/**
 * Synthetic fixtures for eml-parser.test.ts. Nothing here is real customer
 * content — all addresses, subjects, and bodies are invented for testing
 * only (per this milestone's explicit synthetic-fixture-only constraint).
 */

import type { Attachment } from '@/lib/types/autotask';

function makeAttachment(overrides: Partial<Attachment> & { id: number }): Attachment {
  return {
    attachmentType: 'FILE_ATTACHMENT',
    fullPath: '',
    title: '',
    publish: 1,
    contentType: 'message/rfc822',
    ...overrides,
  };
}

/** Tier 1: exact `rfc.eml` present among message/rfc822 attachments (Microsoft "Report Message" flow). */
export const RFC_EML_TIER_ATTACHMENTS: Attachment[] = [
  makeAttachment({ id: 1, title: 'rfc.eml', fullPath: 'rfc.eml' }),
  makeAttachment({ id: 2, title: 'OriginatingEmail.eml', fullPath: 'OriginatingEmail.eml' }),
];

/** Same tier, but with mixed case to verify case-insensitive matching. */
export const RFC_EML_TIER_ATTACHMENTS_UPPERCASE: Attachment[] = [
  makeAttachment({ id: 1, title: 'RFC.EML', fullPath: 'RFC.EML' }),
  makeAttachment({ id: 2, title: 'OriginatingEmail.EML', fullPath: 'OriginatingEmail.EML' }),
];

/** Tier 2: KnowBe4 PhishER flow — versioned filename, no literal rfc.eml. */
export const KNOWBE4_TIER_ATTACHMENTS: Attachment[] = [
  makeAttachment({
    id: 10,
    title: 'phish_alert_sp2_2.0.0.0.eml',
    fullPath: 'phish_alert_sp2_2.0.0.0.eml',
  }),
  makeAttachment({ id: 11, title: 'OriginatingEmail.eml', fullPath: 'OriginatingEmail.eml' }),
];

/** Tier 3: only OriginatingEmail.eml present (older tickets, majority-case fallback). */
export const ORIGINATING_ONLY_ATTACHMENTS: Attachment[] = [
  makeAttachment({ id: 20, title: 'OriginatingEmail.eml', fullPath: 'OriginatingEmail.eml' }),
];

/** Ambiguous: two non-OriginatingEmail message/rfc822 candidates, no rfc.eml — falls back to OriginatingEmail.eml. */
export const AMBIGUOUS_WITH_FALLBACK_ATTACHMENTS: Attachment[] = [
  makeAttachment({ id: 30, title: 'weird_name_1.eml', fullPath: 'weird_name_1.eml' }),
  makeAttachment({ id: 31, title: 'weird_name_2.eml', fullPath: 'weird_name_2.eml' }),
  makeAttachment({ id: 32, title: 'OriginatingEmail.eml', fullPath: 'OriginatingEmail.eml' }),
];

/** Ambiguous with no fallback available — selectOriginalMessage should return null. */
export const AMBIGUOUS_NO_FALLBACK_ATTACHMENTS: Attachment[] = [
  makeAttachment({ id: 40, title: 'weird_name_1.eml', fullPath: 'weird_name_1.eml' }),
  makeAttachment({ id: 41, title: 'weird_name_2.eml', fullPath: 'weird_name_2.eml' }),
];

/** No .eml attachments at all — selectOriginalMessage should return null. */
export const NO_EML_ATTACHMENTS: Attachment[] = [
  makeAttachment({
    id: 50,
    title: 'screenshot.png',
    fullPath: 'screenshot.png',
    contentType: 'image/png',
  }),
];

/** Empty attachment list. */
export const EMPTY_ATTACHMENTS: Attachment[] = [];

// ---------------------------------------------------------------------------
// Synthetic raw .eml buffers for parseEml (EVID-03/EVID-04). All addresses,
// bodies, and content below are invented for testing only — no real
// customer email content per this milestone's Out of Scope constraint.
// ---------------------------------------------------------------------------

/**
 * Rich multipart fixture: text + html bodies (each carrying the same URL),
 * one non-inline base64 attachment, and an Authentication-Results header
 * with spf=pass, dkim=fail, dmarc=none.
 */
export const RICH_MULTIPART_EML = Buffer.from(
  `From: "Attacker Corp" <attacker@evil-example.test>
To: victim@wulfconsulting.test
Cc: cc-user@wulfconsulting.test
Reply-To: reply@evil-example.test
Return-Path: <bounce@evil-example.test>
Subject: Urgent: verify your account
Date: Mon, 15 Jul 2026 12:00:00 +0000
Message-ID: <rich1@evil-example.test>
Authentication-Results: mx.wulfconsulting.test; spf=pass smtp.mailfrom=evil-example.test; dkim=fail header.d=evil-example.test; dmarc=none header.from=evil-example.test
Received: from mx1.example.test by mx2.example.test; Mon, 15 Jul 2026 11:59:00 +0000
Received: from mx0.example.test by mx1.example.test; Mon, 15 Jul 2026 11:58:00 +0000
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="BOUNDARY1"

--BOUNDARY1
Content-Type: multipart/alternative; boundary="BOUNDARY2"

--BOUNDARY2
Content-Type: text/plain; charset="UTF-8"

Please visit http://evil-example.test/verify to verify your account.

--BOUNDARY2
Content-Type: text/html; charset="UTF-8"

<html><body><p>Please visit <a href="http://evil-example.test/verify">this link</a> to verify your account.</p></body></html>

--BOUNDARY2--

--BOUNDARY1
Content-Type: application/pdf; name="invoice.pdf"
Content-Disposition: attachment; filename="invoice.pdf"
Content-Transfer-Encoding: base64

SGVsbG8gV29ybGQh

--BOUNDARY1--
`
);

/** Same as RICH_MULTIPART_EML but also carries Authentication-Results-Original. */
export const RICH_MULTIPART_WITH_AUTH_ORIGINAL_EML = Buffer.from(
  `From: "Attacker Corp" <attacker@evil-example.test>
To: victim@wulfconsulting.test
Subject: Urgent: verify your account (remediated)
Date: Mon, 15 Jul 2026 12:00:00 +0000
Message-ID: <rich2@evil-example.test>
Authentication-Results: mx.wulfconsulting.test; spf=fail smtp.mailfrom=evil-example.test; dkim=fail header.d=evil-example.test; dmarc=fail header.from=evil-example.test
Authentication-Results-Original: mx.wulfconsulting.test; spf=pass smtp.mailfrom=evil-example.test; dkim=pass header.d=evil-example.test; dmarc=pass header.from=evil-example.test
MIME-Version: 1.0
Content-Type: text/plain; charset="UTF-8"

Body text for the remediated-header fixture.
`
);

/**
 * Inline/CID attachment fixture: html references cid:sig123, wrapped in
 * multipart/related so mailparser marks the image attachment `related: true`
 * (Pitfall 5 — inline parts must be kept, not dropped).
 */
export const INLINE_ATTACHMENT_EML = Buffer.from(
  `From: sender@evil-example.test
To: victim@wulfconsulting.test
Subject: Newsletter with inline logo
Date: Mon, 15 Jul 2026 12:00:00 +0000
Message-ID: <inline1@evil-example.test>
MIME-Version: 1.0
Content-Type: multipart/related; boundary="RELBOUND"

--RELBOUND
Content-Type: multipart/alternative; boundary="ALTBOUND"

--ALTBOUND
Content-Type: text/plain; charset="UTF-8"

Plain text body with an inline logo.

--ALTBOUND
Content-Type: text/html; charset="UTF-8"

<html><body><p>Hello</p><img src="cid:sig123"></body></html>

--ALTBOUND--

--RELBOUND
Content-Type: image/png; name="sig.png"
Content-Disposition: inline
Content-ID: <sig123>
Content-Transfer-Encoding: base64

iVBORw0KGgo=

--RELBOUND--
`
);

/** Long-body fixture — long enough to force buildBodyPreview truncation. */
const LONG_PARAGRAPH =
  'This is a long paragraph of synthetic phishing-style body text repeated ' +
  'several times to exceed the body preview truncation threshold. '.repeat(20);

export const LONG_BODY_EML = Buffer.from(
  `From: sender@evil-example.test
To: victim@wulfconsulting.test
Subject: Long body fixture
Date: Mon, 15 Jul 2026 12:00:00 +0000
Message-ID: <long1@evil-example.test>
MIME-Version: 1.0
Content-Type: text/plain; charset="UTF-8"

${LONG_PARAGRAPH}
`
);

/** Fuzzy (scheme-less) www. URL fixture, to exercise linkify-it's fuzzyLink mode. */
export const FUZZY_URL_EML = Buffer.from(
  `From: sender@evil-example.test
To: victim@wulfconsulting.test
Subject: Fuzzy URL fixture
Date: Mon, 15 Jul 2026 12:00:00 +0000
Message-ID: <fuzzy1@evil-example.test>
MIME-Version: 1.0
Content-Type: text/plain; charset="UTF-8"

Visit www.evil-example.com/login to reset your password.
`
);

/** Oversized buffer — exceeds MAX_EML_BYTES, must be rejected before simpleParser runs. */
export function makeOversizedEmlBuffer(maxBytes: number): Buffer {
  const header = `From: sender@evil-example.test
To: victim@wulfconsulting.test
Subject: Oversized fixture
Date: Mon, 15 Jul 2026 12:00:00 +0000
Message-ID: <oversized1@evil-example.test>
MIME-Version: 1.0
Content-Type: text/plain; charset="UTF-8"

`;
  const padding = 'A'.repeat(maxBytes + 1024 - header.length);
  return Buffer.from(header + padding);
}