"""
CALEA System Security and Integrity (SSI) Plan — CLEC SS7 / facilities.

Tailored variant of the generic CALEA SSI plan for a Competitive Local
Exchange Carrier that operates its own TDM / SS7 / SIGTRAN switching
infrastructure. The lawful-intercept method is provisioned at the Class 5
softswitch and at the SS7 / SIGTRAN STPs using the industry-standard
ATIS J-STD-025 interface.  CALEA scope covers both local-exchange
switching and resold access transport.
"""
from __future__ import annotations

import logging
from datetime import date
from pathlib import Path
from typing import Optional

LOG = logging.getLogger("document_gen.calea_clec_ss7")

try:
    from docx import Document
    from docx.shared import Pt, Inches, RGBColor
    from docx.enum.text import WD_ALIGN_PARAGRAPH
except ImportError:
    LOG.warning("python-docx not installed — CALEA CLEC SS7 unavailable")
    Document = None  # type: ignore[assignment,misc]

NAVY = RGBColor(0x1A, 0x27, 0x44) if Document else None

VARIANT_ID = "clec_ss7"
VARIANT_LABEL = "Competitive Local Exchange Carrier — SS7 / SIGTRAN"


def _heading(doc, text):
    p = doc.add_paragraph()
    p.paragraph_format.space_before = Pt(12)
    p.paragraph_format.space_after = Pt(4)
    r = p.add_run(text); r.bold = True; r.font.size = Pt(13)
    r.font.color.rgb = NAVY


def _body(doc, text, bold=False):
    p = doc.add_paragraph()
    p.paragraph_format.space_after = Pt(6)
    r = p.add_run(text); r.font.size = Pt(11); r.bold = bold


def _bullets(doc, items):
    for it in items:
        p = doc.add_paragraph(style="List Bullet")
        p.paragraph_format.left_indent = Inches(0.25)
        p.paragraph_format.space_after = Pt(3)
        p.clear()
        r = p.add_run(it); r.font.size = Pt(11)


def generate_calea_clec_ss7(
    output_path: str,
    entity_name: str,
    frn: str = "",
    law_enforcement_contact: Optional[dict] = None,
    cpni_protection_officer: Optional[dict] = None,
    network_infrastructure_summary: str = "",
    interception_support_method: str = "",
    reporting_year: int = 0,
    signatory_name: str = "",
    signatory_title: str = "Chief Executive Officer",
    effective_date: str = "",
    next_review_date: str = "",
    reviewer_name: str = "Justin Hannah",
    reviewer_company: str = "Performance West Inc.",
    **_: dict,
) -> Optional[str]:
    if Document is None:
        LOG.error("python-docx not installed")
        return None

    le = law_enforcement_contact or {}
    cpni = cpni_protection_officer or {}
    today = date.today()
    effective = effective_date or today.strftime("%m/%d/%Y")
    next_review = next_review_date or today.replace(year=today.year + 1).strftime("%m/%d/%Y")

    doc = Document()
    for s in doc.sections:
        s.top_margin = Inches(1); s.bottom_margin = Inches(1)
        s.left_margin = Inches(1.25); s.right_margin = Inches(1.25)

    title = doc.add_paragraph(); title.alignment = WD_ALIGN_PARAGRAPH.CENTER
    tr = title.add_run("System Security and Integrity (SSI) Plan")
    tr.font.size = Pt(15); tr.bold = True; tr.font.color.rgb = NAVY

    sub = doc.add_paragraph(); sub.alignment = WD_ALIGN_PARAGRAPH.CENTER
    sr = sub.add_run(entity_name)
    sr.font.size = Pt(13); sr.bold = True

    vsub = doc.add_paragraph(); vsub.alignment = WD_ALIGN_PARAGRAPH.CENTER
    vr = vsub.add_run(f"Variant: {VARIANT_LABEL}")
    vr.font.size = Pt(11); vr.italic = True

    cite = doc.add_paragraph(); cite.alignment = WD_ALIGN_PARAGRAPH.CENTER
    cr = cite.add_run(
        "Pursuant to 47 U.S.C. \u00a7 229 and 47 CFR \u00a7 1.20003"
    )
    cr.font.size = Pt(10); cr.italic = True
    cite.paragraph_format.space_after = Pt(18)

    _heading(doc, "1. Purpose")
    _body(doc, (
        f"This System Security and Integrity (SSI) Plan governs {entity_name}'s "
        f"compliance with the Communications Assistance for Law Enforcement "
        f"Act (CALEA), 47 U.S.C. \u00a7\u00a7 1001\u20131010, and the "
        f"Commission's rules at 47 CFR Part 1 Subpart Z, as applied to "
        f"{entity_name}'s operations as a Competitive Local Exchange Carrier "
        f"(CLEC) with SS7 / SIGTRAN switching infrastructure."
    ))

    _heading(doc, "2. Scope and Applicability")
    _body(doc, (
        f"{entity_name} is subject to CALEA as a facilities-based provider "
        f"of common-carrier local exchange service.  Its covered equipment "
        f"includes Class 5 softswitch(es), trunk gateways, SS7 / SIGTRAN "
        f"STPs, and signaling-link interconnections to interexchange "
        f"carriers and to the public switched telephone network."
    ))

    _heading(doc, "3. Designated Law Enforcement Contact (24-hour)")
    _body(doc, (
        f"Per 47 CFR \u00a7 1.20003(a)(1), {entity_name} designates the "
        f"following senior officer as point of contact for law enforcement "
        f"inquiries, court orders, pen register / trap-and-trace orders, "
        f"and Title III wiretap orders. This contact is staffed 24 hours "
        f"a day, 365 days a year."
    ))
    _bullets(doc, [
        f"Name: {le.get('name') or '[TO BE POPULATED]'}",
        f"Title: {le.get('title') or ''}",
        f"Phone (24-hour): {le.get('phone') or ''}",
        f"Email (24-hour): {le.get('email_24h') or ''}",
        f"Backup contact: {le.get('backup_name') or '[TO BE POPULATED]'}",
    ])
    _body(doc, (
        f"Service of process may be made on the above designee by "
        f"telephone, email, or in person. {entity_name} commits to "
        f"acknowledging any intercept or traffic-capture order within "
        f"two (2) business hours of receipt."
    ))

    _heading(doc, "4. Network Architecture and Interception Capability")
    _body(doc, network_infrastructure_summary or (
        f"{entity_name} operates a Class 5 softswitch (or TDM Class 5 "
        "switch where retained) supported by redundant SS7 / SIGTRAN "
        "signaling through owned or leased STPs. Customer access is "
        "provided via copper loops, fiber, and resold UNE-P/loop "
        "facilities where applicable. Interconnection with the PSTN is "
        "by SS7 trunks to the relevant tandems."
    ))
    _body(doc, interception_support_method or (
        f"Lawful intercept is provisioned at the Class 5 softswitch and "
        "at the SS7 / SIGTRAN STP in accordance with ATIS J-STD-025-B "
        "(TIA/ANSI-41/GSM LAES).  Call content is delivered to the "
        "requesting law-enforcement agency via a Call Content Channel "
        "(CCC) and call-identifying information via a Call Data Channel "
        "(CDC), following the safe-harbor industry standard adopted by "
        "the FCC under 47 CFR Part 1 Subpart Z.  The Designated Senior "
        "Officer coordinates provisioning, validates the court order, "
        "and certifies activation to law enforcement."
    ))
    _body(doc, (
        f"{entity_name} retains copies of ATIS J-STD-025 compliance "
        f"attestations from its switch and SS7 vendors, and maintains "
        f"interconnection agreements with its tandem provider(s) that "
        f"address CALEA responsibilities."
    ))

    _heading(doc, "5. CPNI Safeguards")
    _body(doc, (
        f"{entity_name} maintains a separate, written CPNI procedure "
        f"statement under 47 CFR \u00a7\u00a7 64.2001\u201364.2011. The "
        f"CPNI Protection Officer is:"
    ))
    _bullets(doc, [
        f"Name: {cpni.get('name') or '[TO BE POPULATED]'}",
        f"Title: {cpni.get('title') or 'CPNI Protection Officer'}",
    ])
    _body(doc, (
        "SS7 / SIGTRAN LIDB access, PIC records, and intercept "
        "provisioning are all within the CPNI Protection Officer's "
        "oversight scope."
    ))

    _heading(doc, "6. Personnel Vetting and Training")
    _bullets(doc, [
        f"All {entity_name} personnel with access to intercept "
        "provisioning interfaces complete annual CALEA and CPNI training.",
        "Background checks are performed prior to granting access.",
        "Access is revoked within 24 hours of termination.",
        "All intercept-related actions are attributed to named "
        "individuals via authenticated logins (no shared credentials).",
    ])

    _heading(doc, "7. Supervisory Review")
    _body(doc, (
        f"The {le.get('title') or 'Designated Senior Officer'} reviews "
        f"intercept-related activity at least quarterly. Anomalies "
        f"(unauthorized access attempts, tampering, missed response SLAs) "
        f"are escalated to the CEO within one business day of detection."
    ))

    _heading(doc, "8. Records Retention")
    _body(doc, (
        "Records of intercept provisioning, service of process, "
        "acknowledgments, and termination are retained for a minimum of "
        "ten (10) years per 47 CFR \u00a7 1.20003(b). CPNI access logs "
        "are retained at least two (2) years per 47 CFR \u00a7 64.2009."
    ))

    _heading(doc, "9. Annual Review")
    _body(doc, (
        f"This Plan is reviewed at least annually and updated upon "
        f"(i) material change to the switching infrastructure, "
        f"(ii) change of upstream tandem or IXC interconnection, "
        f"(iii) new Commission / DOJ guidance, or (iv) a material breach "
        f"or near-miss. Next scheduled review: {next_review}."
    ))

    _heading(doc, "10. Certification")
    _body(doc, (
        f"I, {signatory_name or '[Authorized Officer]'}, as "
        f"{signatory_title} of {entity_name}, certify that I have "
        f"reviewed this SSI Plan and that {entity_name} has implemented "
        f"the policies, procedures, and technical measures described "
        f"herein, and complies with 47 U.S.C. \u00a7 229 and 47 CFR "
        f"\u00a7 1.20003."
    ))
    _body(doc, "")
    doc.add_paragraph("_" * 45)
    _body(doc, signatory_name or "[Authorized Officer]", bold=True)
    _body(doc, f"{signatory_title}, {entity_name}")
    _body(doc, f"Effective Date: {effective}")
    if frn:
        _body(doc, f"FRN: {frn}")
    _body(doc, f"Reviewed By: {reviewer_name}, {reviewer_company}")
    _body(doc, f"Next Review Date: {next_review}")

    out = Path(output_path)
    out.parent.mkdir(parents=True, exist_ok=True)
    doc.save(str(out))
    LOG.info("CALEA CLEC SS7 SSI plan generated: %s", out)
    return str(out)