/**
 * Port-forward traffic diagram.
 * Solid = path to firewall; dashed = SSH tunnel (explicit stroke — Tailwind stroke-* is unreliable on SVG).
 */

import { useTranslation } from 'react-i18next'
import appIcon from '../../assets/opsxshell-app-icon.png'
import firewallIcon from '../../assets/diagram/network-firewall.png'
import serverIcon from '../../assets/diagram/ec2.png'
import cloudGcp from '../../assets/diagram/cloud-gcp.svg'
import cloudCf from '../../assets/diagram/cloud-cf.svg'
import type { ForwardRuleType } from './forwardRules'

interface ForwardArchitectureDiagramProps {
  type: ForwardRuleType
}

const SOLID = '#fb7185'
const DASH = '#60a5fa'

function AppBadge() {
  return (
    <div className="flex h-11 w-11 shrink-0 items-center justify-center overflow-hidden rounded-xl border border-accent-blue/40 bg-[#0b1220] shadow-lg shadow-accent-blue/15">
      <img src={appIcon} alt="" className="h-10 w-10 object-cover" draggable={false} />
    </div>
  )
}

function IconImg({
  src,
  className,
  rounded,
}: {
  src: string
  className?: string
  rounded?: boolean
}) {
  return (
    <img
      src={src}
      alt=""
      draggable={false}
      className={`object-contain drop-shadow-md ${rounded ? 'rounded-xl' : ''} ${className || ''}`}
    />
  )
}

function SolidPath({ d }: { d: string }) {
  return (
    <path
      d={d}
      fill="none"
      stroke={SOLID}
      strokeWidth="2.4"
      strokeLinecap="round"
    />
  )
}

function DashPath({ d }: { d: string }) {
  return (
    <path
      d={d}
      fill="none"
      stroke={DASH}
      strokeWidth="2.4"
      strokeLinecap="round"
      strokeLinejoin="round"
      strokeDasharray="6 5"
      opacity={0.95}
    />
  )
}

export default function ForwardArchitectureDiagram({ type }: ForwardArchitectureDiagramProps) {
  const { t } = useTranslation('common')

  const caption =
    type === 'local'
      ? t('portForward.diagram.localCaption')
      : type === 'remote'
        ? t('portForward.diagram.remoteCaption')
        : t('portForward.diagram.dynamicCaption')

  return (
    <div className="rounded-xl border border-dark-700/60 bg-dark-900/35 px-3 py-3">
      <div className="mb-2 text-[11px] font-medium text-content-secondary">
        {t('portForward.diagram.title')}
      </div>

      <div className="relative mx-auto h-[160px] w-full max-w-[360px] overflow-hidden rounded-lg border border-dark-700/40 bg-gradient-to-b from-dark-900/50 to-dark-950/70">
        {/* Lines under icons */}
        <svg
          className="pointer-events-none absolute inset-0 h-full w-full"
          viewBox="0 0 360 160"
          preserveAspectRatio="none"
          aria-hidden
        >
          {type === 'local' && (
            <>
              {/* App → firewall (solid) */}
              <SolidPath d="M64 48 H155" />
              {/* App → SSH host → remote targets (dashed) */}
              <DashPath d="M56 58 C100 95, 150 118, 180 122" />
              <DashPath d="M180 122 C235 115, 275 70, 300 48" />
              <DashPath d="M180 122 C245 110, 285 75, 318 52" />
            </>
          )}
          {type === 'remote' && (
            <>
              {/* Same span as Local/Dynamic: ~App→Firewall */}
              <SolidPath d="M64 48 H155" />
              <DashPath d="M56 58 C100 95, 150 118, 180 122" />
              <DashPath d="M304 58 C260 95, 210 118, 180 122" />
            </>
          )}
          {type === 'dynamic' && (
            <>
              <SolidPath d="M64 48 H155" />
              <DashPath d="M56 58 C100 95, 150 118, 180 122" />
              <DashPath d="M180 122 C245 110, 285 70, 318 42" />
              <DashPath d="M180 122 C245 120, 285 100, 320 88" />
              <DashPath d="M180 122 C235 132, 275 138, 318 132" />
            </>
          )}
        </svg>

        {type === 'local' && (
          <>
            <div className="absolute left-3 top-[26px]">
              <AppBadge />
            </div>
            {/* Firewall + SSH host: same column, vertically centered as a pair */}
            <div className="absolute left-1/2 top-1/2 flex -translate-x-1/2 -translate-y-1/2 flex-col items-center gap-3">
              <IconImg src={firewallIcon} rounded className="h-11 w-11" />
              <IconImg src={serverIcon} className="h-10 w-10" />
            </div>
            <div className="absolute right-3 top-[26px] flex items-center gap-1.5 rounded-xl border border-dark-600/60 bg-dark-800/40 px-2 py-1.5">
              <IconImg src={serverIcon} className="h-9 w-9" />
              <IconImg src={serverIcon} className="h-9 w-9" />
            </div>
          </>
        )}

        {type === 'remote' && (
          <>
            {/* Match Local/Dynamic left inset so solid gap equals App→Firewall */}
            <div className="absolute left-3 top-[26px]">
              <IconImg src={serverIcon} className="h-11 w-11" />
            </div>
            <div className="absolute left-1/2 top-[26px] -translate-x-1/2">
              <IconImg src={firewallIcon} rounded className="h-11 w-11" />
            </div>
            <div className="absolute right-3 top-[26px]">
              <IconImg src={serverIcon} className="h-11 w-11" />
            </div>
            <div className="absolute bottom-4 left-1/2 -translate-x-1/2">
              <AppBadge />
            </div>
          </>
        )}

        {type === 'dynamic' && (
          <>
            <div className="absolute left-3 top-[26px]">
              <AppBadge />
            </div>
            {/* Firewall + SSH host stacked & vertically centered */}
            <div className="absolute left-[42%] top-1/2 flex -translate-x-1/2 -translate-y-1/2 flex-col items-center gap-3">
              <IconImg src={firewallIcon} rounded className="h-11 w-11" />
              <IconImg src={serverIcon} className="h-10 w-10" />
            </div>
            <div className="absolute right-3 top-1/2 flex -translate-y-1/2 flex-col items-center gap-2 rounded-2xl border border-dark-600/60 bg-dark-800/40 px-2.5 py-2.5">
              <IconImg src={cloudGcp} className="h-7 w-7" />
              <IconImg src={cloudCf} className="h-7 w-7" />
              <IconImg src={cloudGcp} className="h-6 w-6 opacity-70" />
            </div>
          </>
        )}
      </div>

      <p className="mt-2.5 text-[11px] leading-relaxed text-txt-muted">{caption}</p>
    </div>
  )
}