---
// Block6CertStep — Lines 603-605, 612 + de minimis election.
// Exemption certifications (USF/TRS/NANPA/LNP/ITSP), 501(c)/government,
// nondisclosure request, filing type, and the de minimis vs. regular
// election (with explainer).
import { NONDISCLOSURE_CERT_TEXT, FILING_TYPE_LABELS } from "../../../lib/fcc_constants";
import DeMinimisChoiceExplainer from "../DeMinimisChoiceExplainer.astro";
---

<div class="pw-step">
  <h2>Certifications (Block 6)</h2>

  <section class="pw-block" id="pw-demin-section">
    <h3>De minimis filing election</h3>
    <p class="pw-help">
      Based on your revenue + safe-harbor interstate % and the current
      year's de minimis factor, your estimated annual USF contribution is
      <strong id="pw-demin-estimate">—</strong>. The exemption threshold
      is $10,000 (Appendix A).
    </p>
    <div id="pw-demin-status-banner" class="pw-demin-banner" hidden></div>

    <DeMinimisChoiceExplainer />

    <label class="pw-field">How do you want to file?</label>
    <select id="pw-demin-election" class="pw-input">
      <option value="auto">Let the Appendix A calculation decide (standard)</option>
      <option value="deminimis">File as de minimis — no USF contribution</option>
      <option value="regular">File as regular contributor — pay USF directly (waive exemption)</option>
    </select>

    <div id="pw-waive-reason-wrap" hidden>
      <label class="pw-field">Reason for filing regular (optional — shown to reviewers)</label>
      <textarea id="pw-waive-reason" class="pw-input" rows="2"
        placeholder="e.g., 'Wholesale SIP vendor charges us USF surcharge on trunking — filing regular so we can show Filer ID + reseller cert.'"></textarea>
    </div>
  </section>

  <section class="pw-block">
    <h3>Line 603 — Claim exemption from contribution mechanisms</h3>
    <p class="pw-help">
      Check any mechanism you're exempt from. Exemptions require a written
      explanation and evidence your legal team can produce on audit.
    </p>
    <div class="pw-cert-grid">
      <label><input type="checkbox" id="pw-ex-usf" /> USF (Universal Service Fund)</label>
      <label><input type="checkbox" id="pw-ex-trs" /> TRS (Telecom Relay Service)</label>
      <label><input type="checkbox" id="pw-ex-nanpa" /> NANPA (numbering)</label>
      <label><input type="checkbox" id="pw-ex-lnp" /> LNP (number portability)</label>
      <label><input type="checkbox" id="pw-ex-itsp" /> ITSP (regulatory fees)</label>
    </div>
    <div id="pw-ex-expl-wrap" hidden>
      <label class="pw-field">Explanation (required for any exemption)</label>
      <textarea id="pw-ex-expl" class="pw-input" rows="3"></textarea>
    </div>
  </section>

  <section class="pw-block">
    <h3>Line 604 — Organization type</h3>
    <label><input type="checkbox" id="pw-gov" /> State or local government entity</label><br>
    <label><input type="checkbox" id="pw-501c" /> 501(c) tax-exempt organization</label>
  </section>

  <section class="pw-block">
    <h3>Line 605 — Confidential treatment of revenue data</h3>
    <label>
      <input type="checkbox" id="pw-nondisclosure" />
      Request nondisclosure of revenue information
    </label>
    <p id="pw-nondisclosure-text" class="pw-cert-text" hidden></p>
  </section>

  <section class="pw-block">
    <h3>Line 612 — Type of filing</h3>
    <select id="pw-filing-type" class="pw-input">
      <option value="original_april_1">Original Filing (April 1)</option>
      <option value="registration_new_filer">Registration — New Filer</option>
      <option value="revised_registration">Revised Filing (Registration Info)</option>
      <option value="revised_revenue">Revised Filing (Revenue Info)</option>
    </select>
  </section>

  <div id="pw-b6-err" class="pw-err" hidden></div>
</div>

<style>
  .pw-step h2 { margin: 0 0 0.5rem; color: #1a2744; }
  .pw-step h3 { margin: 0 0 0.4rem; color: #1a2744; font-size: 1rem; }
  .pw-block   { padding: 1rem; border: 1px solid #e2e8f0; border-radius: 8px; margin-bottom: 0.75rem; }
  .pw-help    { color: #64748b; font-size: 0.85rem; margin-bottom: 0.75rem; }
  .pw-field   { display: block; font-weight: 600; color: #1f2937; margin: 0.6rem 0 0.2rem; font-size: 0.88rem; }
  .pw-input   { width: 100%; padding: 0.5rem 0.7rem; border: 1px solid #cbd5e1; border-radius: 6px; font-size: 0.93rem; font-family: inherit; }
  .pw-demin-banner {
    padding: 0.5rem 0.75rem; border-radius: 6px;
    margin-top: 0.5rem; font-size: 0.88rem;
  }
  .pw-demin-banner.pw-exempt   { background: #d1fae5; color: #065f46; border-left: 3px solid #059669; }
  .pw-demin-banner.pw-no-exempt{ background: #fee2e2; color: #991b1b; border-left: 3px solid #dc2626; }
  .pw-demin-banner.pw-near     { background: #fef3c7; color: #92400e; border-left: 3px solid #d97706; }
  .pw-cert-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 0.4rem; margin-bottom: 0.5rem; }
  .pw-cert-grid label { font-size: 0.9rem; }
  .pw-cert-text {
    font-size: 0.82rem; color: #475569;
    background: #f8fafc; padding: 0.5rem 0.75rem; border-radius: 6px;
    margin-top: 0.5rem;
  }
  .pw-err { color: #b91c1c; margin-top: 0.75rem; font-size: 0.9rem; }
</style>

<script>
  import { NONDISCLOSURE_CERT_TEXT } from "../../../lib/fcc_constants";

  const exUsf = document.getElementById("pw-ex-usf") as HTMLInputElement;
  const exTrs = document.getElementById("pw-ex-trs") as HTMLInputElement;
  const exNanpa = document.getElementById("pw-ex-nanpa") as HTMLInputElement;
  const exLnp = document.getElementById("pw-ex-lnp") as HTMLInputElement;
  const exItsp = document.getElementById("pw-ex-itsp") as HTMLInputElement;
  const exExplWrap = document.getElementById("pw-ex-expl-wrap") as HTMLElement;
  const exExpl = document.getElementById("pw-ex-expl") as HTMLTextAreaElement;
  const gov = document.getElementById("pw-gov") as HTMLInputElement;
  const nfp = document.getElementById("pw-501c") as HTMLInputElement;
  const nd = document.getElementById("pw-nondisclosure") as HTMLInputElement;
  const ndText = document.getElementById("pw-nondisclosure-text") as HTMLElement;
  const filingType = document.getElementById("pw-filing-type") as HTMLSelectElement;
  const err = document.getElementById("pw-b6-err") as HTMLDivElement;
  const deminElection = document.getElementById("pw-demin-election") as HTMLSelectElement;
  const deminEstimate = document.getElementById("pw-demin-estimate") as HTMLElement;
  const deminBanner = document.getElementById("pw-demin-status-banner") as HTMLElement;
  const waiveReason = document.getElementById("pw-waive-reason") as HTMLTextAreaElement;
  const waiveReasonWrap = document.getElementById("pw-waive-reason-wrap") as HTMLElement;

  ndText.textContent = NONDISCLOSURE_CERT_TEXT;

  async function refreshDeMinimisEstimate() {
    const s = (window as any).PWIntake.get();
    const year = Number(s.intake_data?.form_year) || new Date().getUTCFullYear() - 1;
    const totalRev = Number(s.intake_data?.total_revenue_cents) || 0;
    const interPct = Number(s.intake_data?.interstate_pct) || 0;
    const intlPct  = Number(s.intake_data?.international_pct) || 0;
    if (!totalRev) {
      deminEstimate.textContent = "— (enter revenue on the Revenue step first)";
      deminBanner.hidden = true;
      return;
    }
    // Quick estimate: contribution base × year factor. We fetch the
    // factor via the late-filing-estimate endpoint (convenient wrapper).
    try {
      const r = await fetch(
        `/api/v1/fcc/late-filing-estimate?year=${year}&total_revenue_cents=${totalRev}&interstate_pct=${interPct + intlPct}`,
      );
      if (!r.ok) throw new Error(`${r.status}`);
      const data = await r.json();
      const est = data.estimated_usf_cents;
      const isExempt = est < 1000000; // $10,000 threshold
      const nearThreshold = est < 1500000 && est >= 750000;
      deminEstimate.textContent = `$${(est / 100).toLocaleString("en-US", { minimumFractionDigits: 2 })}`;
      deminBanner.hidden = false;
      if (isExempt) {
        deminBanner.className = "pw-demin-banner pw-exempt";
        deminBanner.textContent = `✓ You qualify as de minimis. Your estimated $${(est/100).toFixed(2)} annual contribution is below the $10,000 threshold.`;
      } else if (nearThreshold) {
        deminBanner.className = "pw-demin-banner pw-near";
        deminBanner.textContent = `⚠ You're near the de minimis threshold. Small changes in interstate % could push you over — we recommend reviewing your traffic study carefully.`;
      } else {
        deminBanner.className = "pw-demin-banner pw-no-exempt";
        deminBanner.textContent = `You do NOT qualify as de minimis. Estimated $${(est/100).toFixed(2)} exceeds the $10,000 threshold.`;
      }
    } catch {
      deminEstimate.textContent = "— (could not reach server)";
    }
  }

  deminElection.addEventListener("change", () => {
    waiveReasonWrap.hidden = deminElection.value !== "regular";
  });

  function anyExempt() {
    return exUsf.checked || exTrs.checked || exNanpa.checked || exLnp.checked || exItsp.checked;
  }
  function updateExplVisibility() {
    exExplWrap.hidden = !anyExempt();
  }
  [exUsf, exTrs, exNanpa, exLnp, exItsp].forEach((cb) => cb.addEventListener("change", updateExplVisibility));
  nd.addEventListener("change", () => { ndText.hidden = !nd.checked; });

  window.addEventListener("pw:step-shown", (evt: any) => {
    if (evt.detail.step !== "block6_cert") return;
    const s = (window as any).PWIntake.get();
    const d = s.intake_data || {};
    exUsf.checked = !!d.exempt_usf;
    exTrs.checked = !!d.exempt_trs;
    exNanpa.checked = !!d.exempt_nanpa;
    exLnp.checked = !!d.exempt_lnp;
    exItsp.checked = !!d.exempt_itsp;
    exExpl.value = d.exemption_explanation || "";
    gov.checked = !!d.is_state_local_gov;
    nfp.checked = !!d.is_tax_exempt_501c;
    nd.checked  = !!d.nondisclosure_requested;
    filingType.value = d.filing_type || "original_april_1";
    deminElection.value = d.deminimis_election || "auto";
    waiveReasonWrap.hidden = deminElection.value !== "regular";
    waiveReason.value = d.waive_deminimis_reason || "";
    updateExplVisibility();
    ndText.hidden = !nd.checked;
    refreshDeMinimisEstimate();
  });

  window.addEventListener("pw:step-next", (evt: any) => {
    const PW = (window as any).PWIntake;
    if (PW.steps[PW.get().step_index] !== "block6_cert") return;
    if (anyExempt() && !exExpl.value.trim()) {
      err.hidden = false; err.textContent = "Exemption claims require a written explanation."; evt.preventDefault(); return;
    }
    err.hidden = true;
    const election = deminElection.value;
    PW.patchIntakeData({
      exempt_usf: exUsf.checked,
      exempt_trs: exTrs.checked,
      exempt_nanpa: exNanpa.checked,
      exempt_lnp: exLnp.checked,
      exempt_itsp: exItsp.checked,
      exemption_explanation: exExpl.value.trim() || null,
      is_state_local_gov: gov.checked,
      is_tax_exempt_501c: nfp.checked,
      nondisclosure_requested: nd.checked,
      filing_type: filingType.value,
      deminimis_election: election,
      // If the filer explicitly elected "regular", mark is_deminimis false
      // and set the waive flag. If "deminimis", mark is_deminimis true.
      // "auto" leaves is_deminimis to be set by the server-side calc.
      is_deminimis: election === "regular" ? false : (election === "deminimis" ? true : undefined),
      waive_deminimis_reason: election === "regular" ? (waiveReason.value.trim() || null) : null,
    });
    // Expose waive flag on the top-level state so order creation reads it.
    const st = PW.get();
    PW.set({
      ...st,
      waive_deminimis_exemption: election === "regular",
      waive_deminimis_reason: election === "regular" ? (waiveReason.value.trim() || null) : null,
    });
  });
</script>