"""
Generate the FCC CPNI Annual Certification Letter — Private Line / BDS variant.

A private-line (point-to-point) or Business Data Service (BDS) offering
typically holds negligible CPNI: there is no switched calling, no PIC,
no per-call detail record, and no directory assistance.  The carrier's
records are limited to circuit identifiers, service-address endpoints,
and enterprise billing data.  These records generally fall outside the
statutory definition of CPNI at 47 USC § 222(h)(1), which is tied to
"telecommunications service" used by a customer.

This is a short, one-page certification that recites the carrier's
status, acknowledges the limited applicability of the CPNI rules to
its offerings, and commits to the same statutory safeguards (47 CFR
§ 1.17 truthfulness, Title 18 perjury acknowledgment, and forfeiture
awareness).
"""
from __future__ import annotations

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

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

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 — CPNI Private Line generation unavailable")
    Document = None  # type: ignore[assignment,misc]

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

VARIANT_ID = "private_line"
VARIANT_LABEL = "Private Line / Business Data Service (BDS)"

MAX_FORFEITURE_PER_VIOLATION = "$251,322"
MAX_FORFEITURE_CAP = "$2,513,215"


def _sp(p, after=6, before=0):
    p.paragraph_format.space_after = Pt(after)
    if before:
        p.paragraph_format.space_before = Pt(before)


def _h(doc, text):
    p = doc.add_paragraph(); r = p.add_run(text)
    r.font.size = Pt(12); r.bold = True; r.font.color.rgb = _NAVY
    _sp(p, after=4, before=8)


def _b(doc, text, bold=False, size=10):
    p = doc.add_paragraph(); p.alignment = WD_ALIGN_PARAGRAPH.LEFT
    r = p.add_run(text); r.font.size = Pt(size); r.bold = bold
    _sp(p, after=6)


def generate_cpni_private_line(
    output_path: str,
    entity_name: str,
    frn: str = "",
    filer_id_499: str = "",
    officer_name: str = "",
    officer_title: str = "Chief Executive Officer",
    complaints_count: int = 0,
    complaints_description: str = "",
    has_data_broker_inquiries: bool = False,
    data_broker_description: str = "",
    reporting_year: int = 0,
    address_street: str = "",
    address_city: str = "",
    address_state: str = "",
    address_zip: str = "",
    contact_email: str = "",
    contact_phone: str = "",
    breaches: list[dict] | None = None,
    **_: dict,
) -> Optional[str]:
    if Document is None:
        LOG.error("python-docx not installed")
        return None
    if reporting_year == 0:
        reporting_year = datetime.now().year - 1
    breaches = breaches or []

    doc = Document()
    for s in doc.sections:
        s.top_margin = Inches(0.9); s.bottom_margin = Inches(0.9)
        s.left_margin = Inches(1); s.right_margin = Inches(1)

    today = datetime.now().strftime("%B %d, %Y")
    signer = officer_name or "Authorized Officer"
    title = officer_title or "Officer"

    tp = doc.add_paragraph(); tp.alignment = WD_ALIGN_PARAGRAPH.CENTER
    t = tp.add_run("CPNI Annual Certification Letter")
    t.font.size = Pt(14); t.bold = True; t.font.color.rgb = _NAVY
    _sp(tp, after=2)
    sp = doc.add_paragraph(); sp.alignment = WD_ALIGN_PARAGRAPH.CENTER
    s = sp.add_run(
        f"Private Line / Business Data Service  \u2014  "
        f"47 CFR \u00a7 64.2009  \u2014  Calendar Year {reporting_year}"
    )
    s.font.size = Pt(10); s.font.color.rgb = RGBColor(0x55, 0x55, 0x55)
    _sp(sp, after=6)

    _h(doc, "1. Provider Information and Scope")
    lines = [f"Company Name: {entity_name}", f"Variant: {VARIANT_LABEL}"]
    if frn: lines.append(f"FCC Registration Number (FRN): {frn}")
    if filer_id_499: lines.append(f"FCC Form 499 Filer ID: {filer_id_499}")
    addr = ", ".join(filter(None, [address_street, address_city]))
    if address_state or address_zip:
        addr += f", {address_state} {address_zip}".strip()
    if addr.strip(", "):
        lines.append(f"Address: {addr.strip(', ')}")
    if contact_phone: lines.append(f"Telephone: {contact_phone}")
    if contact_email: lines.append(f"Email: {contact_email}")
    lines.append(f"Certifying Officer: {signer}, {title}")
    lines.append(f"Date of Filing: {today}")
    lines.append(f"Filing Deadline: March 2, {reporting_year + 1}")
    _b(doc, "\n".join(lines))

    _h(doc, "2. Officer Statement of Personal Knowledge")
    _b(doc, (
        f"I, {signer}, {title} of {entity_name}, state that I have personal "
        f"knowledge of the matters certified herein and have reviewed "
        f"{entity_name}'s records-handling procedures for private-line / "
        f"Business Data Service (BDS) circuits covering the reporting "
        f"period."
    ))

    _h(doc, "3. Limited Applicability of CPNI Rules")
    _b(doc, (
        f"{entity_name}'s offerings consist principally of dedicated "
        f"point-to-point private-line and/or Business Data Service "
        f"circuits. These offerings generate no switched-call detail "
        f"records, no presubscribed interexchange carrier (PIC) "
        f"information, and no directory-assistance records. The records "
        f"{entity_name} maintains \u2014 circuit identifiers, A-end and "
        f"Z-end service addresses, and enterprise billing data \u2014 "
        f"generally fall outside the statutory definition of Customer "
        f"Proprietary Network Information at 47 USC \u00a7 222(h)(1), "
        f"which is tied to the customer's use of a telecommunications "
        f"service."
    ))
    _b(doc, (
        f"To the extent any subset of these records constitutes CPNI "
        f"under the Commission's rules, {entity_name} certifies compliance "
        f"with 47 CFR \u00a7\u00a7 64.2001 through 64.2011 for the period "
        f"January 1, {reporting_year} through December 31, {reporting_year}.  "
        f"Specifically, access to customer circuit records is restricted "
        f"to authenticated personnel; authentication is required before "
        f"disclosure in response to customer inquiries; annual training "
        f"is provided; and breach-notification procedures comply with "
        f"47 CFR \u00a7 64.2011 as amended by FCC 23-111."
    ))

    _h(doc, "4. Customer Complaints and Data Broker Inquiries")
    if complaints_count == 0 and not has_data_broker_inquiries:
        _b(doc, (
            f"{entity_name} has NOT received any customer complaints "
            f"concerning the unauthorized release or use of CPNI during "
            f"the reporting period, and has NOT received any inquiries or "
            f"communications from data brokers or other unauthorized "
            f"parties seeking CPNI."
        ))
    else:
        if complaints_count == 0:
            _b(doc, (
                f"{entity_name} has NOT received any customer complaints "
                f"during the reporting period."
            ))
        else:
            desc = complaints_description or "Each was investigated and resolved."
            _b(doc, (
                f"{entity_name} HAS received {complaints_count} customer "
                f"complaint{'s' if complaints_count != 1 else ''}. {desc}"
            ))
        if not has_data_broker_inquiries:
            _b(doc, (
                f"{entity_name} has NOT received any data broker or "
                f"pretexting inquiries during the reporting period."
            ))
        else:
            desc = data_broker_description or "Each was refused and documented."
            _b(doc, (
                f"{entity_name} HAS received data broker / pretexting "
                f"inquiries. {desc}"
            ))

    _h(doc, "5. Penalties, Truthfulness, and Perjury Acknowledgment")
    _b(doc, (
        f"{entity_name} acknowledges that CPNI rule violations may subject "
        f"the carrier to forfeitures up to {MAX_FORFEITURE_PER_VIOLATION} "
        f"per violation and up to {MAX_FORFEITURE_CAP} for any single act "
        f"or failure to act.  Pursuant to 47 CFR \u00a7 1.17, the "
        f"undersigned represents that no material factual information has "
        f"been withheld and all statements are truthful, accurate, and "
        f"complete. Willful false statements are punishable under Title "
        f"18, U.S.C. \u00a7 1001, and by forfeiture under 47 U.S.C. "
        f"\u00a7 503."
    ))

    _h(doc, "6. Signature of Certifying Officer")
    _b(doc, (
        "I declare under penalty of perjury under the laws of the United "
        "States of America that the foregoing is true and correct."
    ))
    sig = doc.add_paragraph(); sig.add_run("_" * 45).font.size = Pt(10); _sp(sig, after=2)
    nm = doc.add_paragraph(); nr = nm.add_run(signer); nr.bold = True
    nr.font.size = Pt(10); _sp(nm, after=2)
    tpp = doc.add_paragraph(); tpp.add_run(f"{title}, {entity_name}").font.size = Pt(10)
    _sp(tpp, after=2)
    dp = doc.add_paragraph(); dp.add_run(f"Date: {today}").font.size = Pt(10)
    _sp(dp, after=2)

    out = Path(output_path)
    out.parent.mkdir(parents=True, exist_ok=True)
    doc.save(str(out))
    LOG.info("CPNI Private Line certification letter generated: %s", out)
    return str(out)