import { CheckCircle2, Info } from 'lucide-react';

import { RegistryDrivenForm } from '@/components/admin/shared/registry-driven-form';
import { DocumensoTestButton } from '@/components/admin/documenso/documenso-test-button';
import { EmbeddedSigningCard } from '@/components/admin/documenso/embedded-signing-card';
import { TemplateSyncButton } from '@/components/admin/documenso/template-sync-button';
import { WebhookHealthCard } from '@/components/admin/documenso/webhook-health-card';
import { PageHeader } from '@/components/shared/page-header';
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
import { WarningCallout } from '@/components/ui/warning-callout';

// All field arrays removed - every Documenso setting now flows through
// `RegistryDrivenForm`, which surfaces the env-fallback / port / global
// source badge on each field. The settings themselves live in
// `src/lib/settings/registry.ts` under sections `documenso.api` /
// `.signers` / `.templates` / `.behavior`.

export default function DocumensoSettingsPage() {
  return (
    <div className="space-y-6">
      <PageHeader
        title="Signing service (Documenso)"
        description="API credentials, signer identities, templates, and signing behaviour for every document the CRM puts out for signature (EOI, reservation, contract, custom uploads). Use the test-connection button to verify a saved configuration before relying on it."
      />

      <WarningCallout title="Use Documenso v2, not v1 (v1 API is deprecated)">
        <p>
          The CRM&apos;s signing features are built for Documenso 2.x (v2). Set the API version
          below to <strong>v1</strong> only if this port still points at a Documenso 1.13.x server.
          Be aware these CRM functions <strong>do not work (or run degraded)</strong> on v1:
        </p>
        <ul className="ms-4 mt-1 list-disc space-y-1">
          <li>
            <strong>Editing an envelope after it is created</strong> (title, subject, redirect URL):
            hard-fails, because v1 has no <code>/envelope/update</code> endpoint.
          </li>
          <li>
            <strong>Upload-and-send contracts / reservations</strong> fall back to v1&apos;s
            per-field placement: page size is assumed to be A4, and rich field metadata (required
            flags, NUMBER min/max, CHECKBOX / DROPDOWN / RADIO option lists) is dropped.
          </li>
          <li>
            <strong>One-call send with per-recipient signing links</strong>,{' '}
            <strong>sequential signing enforcement</strong>, and the{' '}
            <strong>v2 webhook events</strong> (recipient viewed / signed, declined, reminder sent)
            are unavailable or ignored on v1.
          </li>
        </ul>
        <p className="mt-1">
          Recommended: upgrade the Documenso server to 2.x, then set the API version to v2 and run
          the test-connection button to confirm.
        </p>
      </WarningCallout>

      <Card>
        <CardHeader>
          <CardTitle className="flex items-center gap-2 text-base">
            <Info className="h-4 w-4" aria-hidden="true" />
            v1 vs v2 - what changes when you flip the API version
          </CardTitle>
        </CardHeader>
        <CardContent className="space-y-4 text-sm">
          <p className="text-muted-foreground">
            The CRM supports both Documenso 1.13.x (v1) and 2.x (v2). v1 is the default for
            backwards compatibility. v2 is recommended for new ports and unlocks the features below.
            Switching versions does <strong>not</strong> require any code changes - version-aware
            client methods pick the right endpoint per port. Switch, save, then run the
            test-connection button to confirm the chosen instance is actually on the matching
            Documenso version.
          </p>

          <div className="rounded-md border border-border bg-muted/40 p-3">
            <p className="mb-2 text-xs font-semibold uppercase tracking-wider text-muted-foreground">
              v2-only capabilities the CRM already uses when you pick v2
            </p>
            <ul className="space-y-1.5">
              <li className="flex items-start gap-2">
                <CheckCircle2
                  className="mt-0.5 h-4 w-4 shrink-0 text-emerald-600"
                  aria-hidden="true"
                />
                <span>
                  <strong>Bulk field placement.</strong> One API call per envelope vs. v1&apos;s
                  per-field POST loop. Faster contract generation, fewer transient retries on
                  multi-field uploaded contracts.
                </span>
              </li>
              <li className="flex items-start gap-2">
                <CheckCircle2
                  className="mt-0.5 h-4 w-4 shrink-0 text-emerald-600"
                  aria-hidden="true"
                />
                <span>
                  <strong>Percent-based field coordinates.</strong> No page-dimension lookup needed
                  - coordinates are portable across page sizes. v1 requires us to assume A4 for
                  auto-placed fields.
                </span>
              </li>
              <li className="flex items-start gap-2">
                <CheckCircle2
                  className="mt-0.5 h-4 w-4 shrink-0 text-emerald-600"
                  aria-hidden="true"
                />
                <span>
                  <strong>Richer field metadata.</strong> TEXT labels &amp; required flags, NUMBER
                  min/max + format, CHECKBOX/DROPDOWN/RADIO option lists with defaults - all ignored
                  by v1, surfaced by v2 in the signing UI.
                </span>
              </li>
              <li className="flex items-start gap-2">
                <CheckCircle2
                  className="mt-0.5 h-4 w-4 shrink-0 text-emerald-600"
                  aria-hidden="true"
                />
                <span>
                  <strong>v2-flavoured webhook events.</strong> <code>RECIPIENT_VIEWED</code>,{' '}
                  <code>RECIPIENT_SIGNED</code>, <code>DOCUMENT_RECIPIENT_COMPLETED</code>,{' '}
                  <code>DOCUMENT_DECLINED</code>, <code>DOCUMENT_REMINDER_SENT</code> - all routed
                  through the same dedup + audit pipeline as v1 events.
                </span>
              </li>
              <li className="flex items-start gap-2">
                <CheckCircle2
                  className="mt-0.5 h-4 w-4 shrink-0 text-emerald-600"
                  aria-hidden="true"
                />
                <span>
                  <strong>Envelope CRUD endpoints.</strong> <code>GET</code>, <code>DELETE</code>,
                  <code>POST /envelope/create</code> (multipart),{' '}
                  <code>POST /envelope/distribute</code>, <code>POST /envelope/redistribute</code>,{' '}
                  <code>GET /envelope/{'{id}'}/download</code> - all routed through{' '}
                  <code>/api/v2/envelope/...</code> when v2 is selected. The template-generate path
                  is intentionally still v1 (relies on Documenso 2.x&apos;s backward-compat window -
                  see the deferred-roadmap below).
                </span>
              </li>
              <li className="flex items-start gap-2">
                <CheckCircle2
                  className="mt-0.5 h-4 w-4 shrink-0 text-emerald-600"
                  aria-hidden="true"
                />
                <span>
                  <strong>One-call send.</strong> v2&apos;s <code>/envelope/distribute</code>{' '}
                  returns per-recipient <code>signingUrl</code> in the same response - v1 requires a
                  separate GET to fetch them. Faster send flow on the rep side.
                </span>
              </li>
              <li className="flex items-start gap-2">
                <CheckCircle2
                  className="mt-0.5 h-4 w-4 shrink-0 text-emerald-600"
                  aria-hidden="true"
                />
                <span>
                  <strong>Sequential signing enforcement.</strong> Pick SEQUENTIAL in the &quot;v2
                  signing behaviour&quot; card below and Documenso 2.x refuses to email recipient
                  N+1 until recipient N has signed. Eliminates the &quot;approver signed before the
                  developer did&quot; race on EOIs.
                </span>
              </li>
              <li className="flex items-start gap-2">
                <CheckCircle2
                  className="mt-0.5 h-4 w-4 shrink-0 text-emerald-600"
                  aria-hidden="true"
                />
                <span>
                  <strong>Post-signing redirect URL.</strong> Set in the &quot;v2 signing
                  behaviour&quot; card; Documenso redirects the signer to that URL after they
                  complete signing. Use to land clients on the marketing site&apos;s success page or
                  back in the portal instead of Documenso&apos;s default thank-you page. (v1 honours
                  this too - listed here because the admin setting was added with the v2 work.)
                </span>
              </li>
            </ul>
          </div>

          <div className="rounded-md border border-amber-200 bg-amber-50/60 p-3 dark:border-amber-900/40 dark:bg-amber-950/30">
            <p className="mb-2 text-xs font-semibold uppercase tracking-wider text-amber-700 dark:text-amber-400">
              v2 capabilities deferred (would need new code paths)
            </p>
            <ul className="space-y-1.5 text-muted-foreground">
              <li>
                <strong>
                  Single-shot <code>/template/use</code>
                </strong>{' '}
                with v2 <code>prefillFields</code> by ID - current EOI flow uses{' '}
                <code>/api/v1/templates/{'{id}'}/generate-document</code> with{' '}
                <code>formValues</code> keyed by name. v2 instances accept both during their
                backward-compat window; full migration requires per-template field-ID capture in
                admin settings.
              </li>
              <li>
                <strong>
                  Update envelope metadata after creation (<code>/envelope/update</code>)
                </strong>{' '}
                - change title / subject / redirectUrl on a doc already in DRAFT/PENDING without
                re-generating.
              </li>
              <li>
                <strong>Non-SIGNER recipient roles (CC / VIEWER)</strong> - APPROVER role is already
                used by the EOI template; CC + VIEWER not yet exposed in the recipient builder.
                Useful for sales managers who want a copy without a signature slot.
              </li>
            </ul>
            <p className="mt-2 text-xs text-muted-foreground">
              Sequential signing and post-signing redirect URL <strong>are now wired</strong> - see
              the new &quot;v2 signing behaviour&quot; card below to configure them.
            </p>
          </div>
        </CardContent>
      </Card>

      <RegistryDrivenForm
        title="Documenso API"
        description="Per-port API credentials. AES-encrypted at rest. Leave blank to inherit from the env fallback (badged below each field)."
        sections={['documenso.api']}
        extra={<DocumensoTestButton />}
      />

      <RegistryDrivenForm
        sections={['documenso.behavior']}
        title="Signing behaviour"
        description="Cross-cutting settings that apply to EOIs + uploaded contracts/reservations. Sequential signing is v2-only (v1 instances ignore it). Redirect URL is honoured by both v1 and v2 instances."
      />

      <RegistryDrivenForm
        sections={['documenso.signers']}
        title="Signers (developer + approver)"
        description="Identity bound to the developer (signing order 2) and approver (signing order 3) slots in your Documenso templates. Leave name + email blank to fall through to whatever you set on the Documenso template itself; set them here to override the template's stored values at send time. Recipient IDs are populated automatically by 'Sync from Documenso' below. Linking a CRM user is optional  -  when set, the platform fires an in-CRM notification for that user when it's their turn to sign."
      />

      <RegistryDrivenForm
        sections={['documenso.templates']}
        title="Templates & signing pathway"
        description="Default pathway, template IDs, and email behaviour for EOIs, reservations, and contracts. Recipient + field discovery happens via 'Sync from Documenso' below - that also populates the EOI template ID for you. Most ports leave the reservation/contract template IDs blank because those are typically drafted per interest and uploaded for signing; set them only if you maintain standardised Documenso templates for them."
        extra={<TemplateSyncButton />}
      />

      <EmbeddedSigningCard />

      <WebhookHealthCard />
    </div>
  );
}
