"""
CALEA System Security and Integrity (SSI) Plan — Wireless (CMRS) variant.

Facilities-based wireless carrier SSI plan. LAES (Lawfully Authorized
Electronic Surveillance) capability is provisioned at the Mobile
Switching Center (MSC) / 4G EPC / 5G Core per 47 CFR § 20.13 and the
ATIS/3GPP LI standards.  Content and call-identifying information are
delivered to law enforcement over the standardized LI interfaces (X1 /
X2 / X3 for 3GPP).  The Plan also addresses per-device location data
as a CPNI safeguard integration point.
"""
from __future__ import annotations

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

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

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 Wireless unavailable")
    Document = None  # type: ignore[assignment,misc]

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

VARIANT_ID = "wireless"
VARIANT_LABEL = "Wireless (CMRS) Facilities"


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_wireless(
    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, 47 CFR \u00a7 1.20003, "
        "and 47 CFR \u00a7 20.13"
    )
    cr.font.size = Pt(10); cr.italic = True
    cite.paragraph_format.space_after = Pt(18)

    _heading(doc, "1. Purpose")
    _body(doc, (
        f"This SSI Plan governs {entity_name}'s compliance with CALEA "
        f"(47 U.S.C. \u00a7\u00a7 1001\u20131010) and the Commission's "
        f"rules at 47 CFR Part 1 Subpart Z and 47 CFR \u00a7 20.13 as "
        f"applied to {entity_name}'s operations as a facilities-based "
        f"Commercial Mobile Radio Service (CMRS) provider."
    ))

    _heading(doc, "2. Scope and Applicability")
    _body(doc, (
        f"{entity_name} is a facilities-based CMRS provider subject to "
        f"the Lawfully Authorized Electronic Surveillance (LAES) "
        f"obligations of 47 CFR \u00a7 20.13. Its covered equipment "
        f"includes the Mobile Switching Center (MSC), 4G Evolved Packet "
        f"Core (EPC), 5G Core, HSS / UDM, SMS-C, and the associated "
        f"radio-access network (eNB / gNB) provisioning systems."
    ))

    _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 24-hour point of contact for court "
        f"orders, pen-register/trap-and-trace orders, Title III wiretap "
        f"orders, and location-information orders."
    ))
    _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"{entity_name} commits to acknowledging any order within two (2) "
        f"business hours of receipt."
    ))

    _heading(doc, "4. Network Architecture and Interception Capability")
    _body(doc, network_infrastructure_summary or (
        f"{entity_name} operates a radio-access network (eNB / gNB), a 4G "
        "EPC with MME / S-GW / P-GW elements, and where deployed a 5G "
        "Core with AMF / SMF / UPF. Subscriber identity and location are "
        "held in the HSS / UDM.  Voice service is delivered via IMS / "
        "VoLTE or via circuit-switched fallback."
    ))
    _body(doc, interception_support_method or (
        f"Lawful intercept (LAES) is provisioned at {entity_name}'s MSC / "
        "EPC / 5GC elements using the 3GPP-standardized LI interfaces "
        "(X1 for provisioning / administration, X2 for intercept-related "
        "information, X3 for content-of-communications) per 3GPP TS "
        "33.126 / 33.127 / 33.128 and ATIS T1.724 / J-STD-025.  Call "
        "content and call-identifying information (including cell-site "
        "/ E911 / handover location data where lawfully ordered) are "
        "delivered to the requesting agency through these standard "
        "interfaces."
    ))

    _heading(doc, "5. CPNI Safeguards")
    _body(doc, (
        f"{entity_name} maintains a separate CPNI procedure statement "
        f"under 47 CFR \u00a7\u00a7 64.2001\u201364.2011. Device-level "
        f"location data is treated as CPNI, consistent with the "
        f"Commission's 2020 LocationSmart Consent Decree (DA 20-299) "
        f"and 2024 NAL against unauthorized third-party location sharing. "
        f"The CPNI Protection Officer is:"
    ))
    _bullets(doc, [
        f"Name: {cpni.get('name') or '[TO BE POPULATED]'}",
        f"Title: {cpni.get('title') or 'CPNI Protection Officer'}",
    ])

    _heading(doc, "6. Personnel Vetting and Training")
    _bullets(doc, [
        "Annual CALEA + CPNI training for all personnel with LI or CPNI "
        "access.",
        "Background checks performed prior to granting access to LI "
        "provisioning or HSS / UDM systems.",
        "Access revoked within 24 hours of termination.",
        "All LI actions attributed to authenticated named users; no "
        "shared credentials.",
    ])

    _heading(doc, "7. Supervisory Review")
    _body(doc, (
        f"The {le.get('title') or 'Designated Senior Officer'} reviews "
        f"LI activity logs at least quarterly. Anomalies are escalated "
        f"to the CEO within one business day."
    ))

    _heading(doc, "8. Records Retention")
    _body(doc, (
        "LI provisioning and service-of-process records retained ten (10) "
        "years per 47 CFR \u00a7 1.20003(b); CPNI access logs 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 upon (i) material "
        f"core or RAN network change, (ii) new 3GPP LI release adoption, "
        f"(iii) new Commission / DOJ guidance, or (iv) a material breach. "
        f"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} complies with "
        f"47 U.S.C. \u00a7 229, 47 CFR \u00a7 1.20003, and 47 CFR "
        f"\u00a7 20.13."
    ))
    _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 Wireless SSI plan generated: %s", out)
    return str(out)