"""
CALEA SSI Plan — Wireless MVNO variant.

A Mobile Virtual Network Operator has no radio-access network and no
core-network switching of its own. Under the CALEA Reference Model, the
host MNO is responsible for actual lawful-intercept provisioning and
delivery; the MVNO's SSI Plan documents the division of responsibility,
the designated point of contact for law enforcement service of process,
and the contractual flow-down terms that obligate the host MNO to
support intercepts initiated against the MVNO's subscribers.
"""
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_mvno")

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

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

VARIANT_ID = "wireless_mvno"
VARIANT_LABEL = "Wireless (CMRS) — MVNO"


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_mvno(
    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,
    host_mno_name: str = "",
    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")
    host = host_mno_name or "its host Mobile Network Operator"

    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 SSI Plan governs {entity_name}'s compliance with CALEA and "
        f"its implementing rules as applied to {entity_name}'s operations "
        f"as a Mobile Virtual Network Operator (MVNO) that resells "
        f"wireless service provided by {host}."
    ))

    _heading(doc, "2. Scope and Applicability — Division of Responsibility")
    _body(doc, (
        f"{entity_name} does not own or operate radio-access equipment, "
        f"a Mobile Switching Center, an EPC / 5GC, or HSS / UDM. Under "
        f"the CALEA Reference Model and the MVNO wholesale agreement "
        f"between {entity_name} and {host}, intercept capability is "
        f"provisioned and operated by {host}. {entity_name}'s SSI "
        f"responsibility is limited to: (i) maintaining a designated "
        f"24-hour law-enforcement point of contact, (ii) coordinating "
        f"service of process between law enforcement and {host}, "
        f"(iii) ensuring contractual flow-down of CALEA obligations to "
        f"{host}, and (iv) protecting its own customer records."
    ))

    _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 contact for law enforcement."
    ))
    _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"Upon receipt of a valid court order, {entity_name}'s designated "
        f"officer (a) acknowledges service within two (2) business hours, "
        f"(b) confirms that the subscriber is provisioned on {host}'s "
        f"network, and (c) coordinates with {host}'s CALEA / LAES team "
        f"to effect intercept provisioning, providing the ordering "
        f"agency with the appropriate host-MNO CALEA contact as "
        f"required."
    ))

    _heading(doc, "4. Network / Interception Capability (Host MNO)")
    _body(doc, network_infrastructure_summary or (
        f"Voice, SMS, and data services consumed by {entity_name}'s "
        f"subscribers traverse {host}'s radio-access network and core. "
        f"Authentication is performed against {host}'s HSS / UDM."
    ))
    _body(doc, interception_support_method or (
        f"Lawful intercept is provisioned by {host} using the standardized "
        f"3GPP LI interfaces (X1 / X2 / X3) at {host}'s MSC / EPC / 5GC, "
        f"per ATIS T1.724 / J-STD-025 and 3GPP TS 33.126 / 33.127 / "
        f"33.128.  {host} is responsible for delivering content and "
        f"call-identifying information to the requesting law-enforcement "
        f"agency."
    ))
    _body(doc, (
        f"{entity_name} retains an executed copy of the MVNO wholesale "
        f"agreement with {host}, including the CALEA flow-down clauses, "
        f"and a current copy of {host}'s CALEA attestation on file."
    ))

    _heading(doc, "5. CPNI Safeguards")
    _body(doc, (
        f"{entity_name} maintains separate CPNI procedures under 47 CFR "
        f"\u00a7\u00a7 64.2001\u201364.2011 with respect to retail "
        f"customer records, billing data, and support interactions that "
        f"{entity_name} directly controls. 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 personnel handling customer "
        "records or law-enforcement service of process.",
        "Background checks prior to granting access.",
        "Access revoked within 24 hours of termination.",
        "All service-of-process and CPNI actions attributed to named "
        "authenticated users.",
    ])

    _heading(doc, "7. Supervisory Review")
    _body(doc, (
        f"The {le.get('title') or 'Designated Senior Officer'} reviews "
        f"service-of-process logs and MVNO-host coordination records at "
        f"least quarterly."
    ))

    _heading(doc, "8. Records Retention")
    _body(doc, (
        "Service-of-process coordination 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 any change to "
        f"the MVNO wholesale agreement or to {host}'s CALEA attestation. "
        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 47 "
        f"U.S.C. \u00a7 229 and 47 CFR \u00a7 1.20003 through its MVNO "
        f"wholesale arrangement with {host}."
    ))
    _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 MVNO SSI plan generated: %s", out)
    return str(out)