import { Card } from '@/libs/frontend-ui-primitives'
import { DetailRow } from '@/components/common/DetailRow'
import EntityBadge from '@/components/common/EntityBadge'
import type { GruStandardsProfile } from '@/services/api/gru'
import Link from 'next/link'

const STANDARD_EXPLANATIONS: Record<string, string> = {
  'ERC-20': 'Base fungible-token surface for wallets, DEXs, explorers, and accounting systems.',
  AccessControl: 'Role-governed administration for mint, burn, pause, and supervised operations.',
  Pausable: 'Emergency intervention surface for freezing activity during incidents or policy actions.',
  'EIP-712': 'Typed signing domain for structured off-chain approvals and payment flows.',
  'ERC-2612': 'Permit support for signature-based approvals without a separate on-chain approve transaction.',
  'ERC-3009': 'Authorization-based transfer model for signed payment flows without prior allowances.',
  'ERC-5267': 'Discoverable EIP-712 domain introspection so wallets and relayers can inspect the signing domain cleanly.',
  IeMoneyToken: 'Repo-native eMoney token methodology for issuance and redemption semantics.',
  DeterministicStorageNamespace: 'Stable namespace for upgrade-aware policy, registry, and audit resolution.',
  JurisdictionAndSupervisionMetadata: 'Governance, supervisory, disclosure, and reporting metadata required by the GRU operating model.',
}

function formatDuration(seconds: number | null): string | null {
  if (seconds == null || !Number.isFinite(seconds) || seconds <= 0) return null
  const units = [
    { label: 'day', value: 86400 },
    { label: 'hour', value: 3600 },
    { label: 'minute', value: 60 },
  ]
  const parts: string[] = []
  let remaining = Math.floor(seconds)
  for (const unit of units) {
    if (remaining >= unit.value) {
      const count = Math.floor(remaining / unit.value)
      remaining -= count * unit.value
      parts.push(`${count} ${unit.label}${count === 1 ? '' : 's'}`)
    }
    if (parts.length === 2) break
  }
  if (parts.length === 0) {
    return `${remaining} second${remaining === 1 ? '' : 's'}`
  }
  return parts.join(' ')
}

export default function GruStandardsCard({
  profile,
  title = 'GRU v2 Standards',
}: {
  profile: GruStandardsProfile
  title?: string
}) {
  const detectedCount = profile.standards.filter((standard) => standard.detected).length
  const requiredCount = profile.standards.filter((standard) => standard.required).length
  const missingRequired = profile.standards.filter((standard) => standard.required && !standard.detected)
  const noticePeriod = formatDuration(profile.minimumUpgradeNoticePeriodSeconds)
  const recommendations = [
    missingRequired.length > 0
      ? `Review the live contract ABI and deployment against the GRU v2 base-token matrix before treating this asset as fully canonical.`
      : `The live contract exposes the full required GRU v2 base-token surface currently checked by the explorer.`,
    profile.wrappedTransport
      ? 'This looks like a wrapped transport asset, so confirm the corresponding bridge lane and reserve-verifier posture in addition to the token ABI.'
      : 'This looks like a canonical GRU asset, so the next meaningful checks are reserve, governance, and transport activation beyond the token interface itself.',
    profile.x402Ready
      ? 'This contract appears ready for x402-style payment flows because the explorer can see the required signature and domain surfaces.'
      : 'This contract does not currently look x402-ready from the live explorer surface; verify EIP-712, ERC-5267, and permit or authorization flow exposure before using it as a payment rail.',
    profile.forwardCanonical === true
      ? 'This version is marked forward-canonical, so it should be treated as the preferred successor surface even if older liquidity or transport versions still coexist.'
      : profile.forwardCanonical === false
        ? 'This version is not forward-canonical, which usually means it is legacy, staged, or transport-only relative to the intended primary canonical surface.'
        : 'Forward-canonical posture is not directly detectable on this contract, so rely on the transport overlay and deployment records before making promotion assumptions.',
    profile.legacyAliasSupport
      ? 'Legacy alias support is exposed, which is useful during version cutovers and explorer/search reconciliation.'
      : 'Legacy alias support is not visible from the current explorer contract surface, so name/version migration may need registry or deployment-record cross-checks.',
    'Use the repo standards references to reconcile any missing surface with the intended GRU profile and rollout phase.',
  ]

  return (
    <Card title={title}>
      <dl className="space-y-4">
        <DetailRow label="Profile">
          <div className="space-y-2">
            <div className="flex flex-wrap gap-2">
              <EntityBadge label={profile.profileId} tone="info" className="normal-case tracking-normal" />
              <EntityBadge
                label={profile.wrappedTransport ? 'wrapped transport' : 'canonical GRU'}
                tone={profile.wrappedTransport ? 'warning' : 'success'}
              />
            </div>
            <div className="text-sm text-gray-600 dark:text-gray-400">
              {detectedCount} of {requiredCount} required base-token standards are currently detectable from the live contract surface.
            </div>
          </div>
        </DetailRow>

        <DetailRow label="Standards" valueClassName="flex flex-wrap gap-2">
          {profile.standards.map((standard) => (
            <EntityBadge
              key={standard.id}
              label={standard.detected ? `${standard.id} detected` : `${standard.id} missing`}
              tone={standard.detected ? 'success' : 'warning'}
              className="normal-case tracking-normal"
            />
          ))}
        </DetailRow>

        <DetailRow label="Transport Posture">
          <div className="space-y-3">
            <div className="flex flex-wrap gap-2">
              <EntityBadge
                label={profile.x402Ready ? 'x402 ready' : 'x402 not ready'}
                tone={profile.x402Ready ? 'success' : 'warning'}
              />
              <EntityBadge
                label={
                  profile.forwardCanonical === true
                    ? 'forward canonical'
                    : profile.forwardCanonical === false
                      ? 'not forward canonical'
                      : 'forward canonical unknown'
                }
                tone={
                  profile.forwardCanonical === true
                    ? 'success'
                    : profile.forwardCanonical === false
                      ? 'warning'
                      : 'info'
                }
              />
              <EntityBadge
                label={profile.legacyAliasSupport ? 'legacy aliases exposed' : 'no alias surface'}
                tone={profile.legacyAliasSupport ? 'info' : 'warning'}
              />
            </div>
            <div className="grid gap-3 md:grid-cols-2">
              <div className="rounded-xl border border-gray-200 bg-gray-50 p-3 text-sm dark:border-gray-700 dark:bg-gray-900/40">
                <div className="text-xs font-semibold uppercase tracking-wide text-gray-500 dark:text-gray-400">Settlement posture</div>
                <div className="mt-2 text-gray-900 dark:text-white">
                  {profile.wrappedTransport
                    ? 'This contract presents itself like a wrapped public-transport asset instead of the canonical Chain 138 money surface.'
                    : 'This contract presents itself like the canonical Chain 138 GRU money surface instead of a wrapped transport mirror.'}
                </div>
              </div>
              <div className="rounded-xl border border-gray-200 bg-gray-50 p-3 text-sm dark:border-gray-700 dark:bg-gray-900/40">
                <div className="text-xs font-semibold uppercase tracking-wide text-gray-500 dark:text-gray-400">Upgrade notice</div>
                <div className="mt-2 text-gray-900 dark:text-white">
                  {noticePeriod
                    ? `${noticePeriod} (${profile.minimumUpgradeNoticePeriodSeconds} seconds)`
                    : 'No readable minimum upgrade notice period was detected from the current explorer surface.'}
                </div>
              </div>
              <div className="rounded-xl border border-gray-200 bg-gray-50 p-3 text-sm dark:border-gray-700 dark:bg-gray-900/40">
                <div className="text-xs font-semibold uppercase tracking-wide text-gray-500 dark:text-gray-400">Version posture</div>
                <div className="mt-2 text-gray-900 dark:text-white">
                  {profile.activeVersion || profile.forwardVersion
                    ? `Active liquidity/transport version: ${profile.activeVersion || 'unknown'}; preferred forward version: ${profile.forwardVersion || 'unknown'}.`
                    : 'No explicit active-versus-forward version posture is available from the local GRU catalog yet.'}
                </div>
              </div>
            </div>
          </div>
        </DetailRow>

        <DetailRow label="Interpretation">
          <div className="space-y-3">
            {profile.standards.map((standard) => (
              <div key={`${standard.id}-explanation`} className="rounded-xl border border-gray-200 bg-gray-50 p-3 text-sm dark:border-gray-700 dark:bg-gray-900/40">
                <div className="flex flex-wrap items-center gap-2">
                  <div className="font-medium text-gray-900 dark:text-white">{standard.id}</div>
                  <EntityBadge label={standard.detected ? 'detected' : 'missing'} tone={standard.detected ? 'success' : 'warning'} />
                </div>
                <div className="mt-2 text-gray-600 dark:text-gray-400">
                  {STANDARD_EXPLANATIONS[standard.id] || 'GRU-specific standard surfaced by the repo standards profile.'}
                </div>
              </div>
            ))}
          </div>
        </DetailRow>

        {profile.metadata.length > 0 ? (
          <DetailRow label="Metadata">
            <div className="space-y-3">
              {profile.metadata.map((field) => (
                <div key={field.label} className="rounded-xl border border-gray-200 bg-gray-50 p-3 text-sm dark:border-gray-700 dark:bg-gray-900/40">
                  <div className="text-xs font-semibold uppercase tracking-wide text-gray-500 dark:text-gray-400">{field.label}</div>
                  <div className="mt-2 break-all text-gray-900 dark:text-white">{field.value}</div>
                </div>
              ))}
            </div>
          </DetailRow>
        ) : null}

        <DetailRow label="References">
          <div className="space-y-2 text-sm text-gray-600 dark:text-gray-400">
            <div><Link href="/docs/gru" className="text-primary-600 hover:underline">Explorer GRU guide</Link></div>
            <div>Canonical profile: <code className="rounded bg-gray-100 px-1.5 py-0.5 text-xs dark:bg-gray-800">{profile.profileId}</code></div>
            <div>Repo standards matrix: <code className="rounded bg-gray-100 px-1.5 py-0.5 text-xs dark:bg-gray-800">docs/04-configuration/GRU_C_STAR_V2_STANDARDS_MATRIX_AND_IMPLEMENTATION_PLAN.md</code></div>
            <div>Machine-readable profile: <code className="rounded bg-gray-100 px-1.5 py-0.5 text-xs dark:bg-gray-800">config/gru-standards-profile.json</code></div>
            <div>Transport overlay: <code className="rounded bg-gray-100 px-1.5 py-0.5 text-xs dark:bg-gray-800">config/gru-transport-active.json</code></div>
            <div>x402 support note: <code className="rounded bg-gray-100 px-1.5 py-0.5 text-xs dark:bg-gray-800">docs/04-configuration/CHAIN138_X402_TOKEN_SUPPORT.md</code></div>
            <div>Chain 138 readiness guide: <code className="rounded bg-gray-100 px-1.5 py-0.5 text-xs dark:bg-gray-800">docs/04-configuration/GRU_V2_CHAIN138_READINESS.md</code></div>
          </div>
        </DetailRow>

        <DetailRow label="Recommendations">
          <div className="space-y-2 text-sm text-gray-600 dark:text-gray-400">
            {recommendations.map((item) => (
              <div key={item} className="rounded-xl border border-gray-200 bg-gray-50 p-3 dark:border-gray-700 dark:bg-gray-900/40">
                {item}
              </div>
            ))}
          </div>
        </DetailRow>
      </dl>
    </Card>
  )
}