import type { ReactNode } from 'react'
import { SectionHeader } from '../components/SectionHeader'
import { InstrumentCard } from '../components/InstrumentCard'
import { Container } from '../components/Container'
import { useI18n } from '../i18n'

interface FeatureMeta {
  icon: ReactNode
  tag: 'FREE' | 'PRO' | 'PRO+'
}

const featureMeta: FeatureMeta[] = [
  { icon: <MicIcon />, tag: 'FREE' },
  { icon: <SparklesIcon />, tag: 'FREE' },
  { icon: <LanguageIcon />, tag: 'FREE' },
  { icon: <CaptionIcon />, tag: 'PRO' },
  { icon: <ConversationIcon />, tag: 'PRO+' },
  { icon: <FileIcon />, tag: 'PRO+' },
  { icon: <ChainIcon />, tag: 'PRO' },
  { icon: <ContextIcon />, tag: 'PRO' },
  { icon: <MemoIcon />, tag: 'PRO' },
]

const tagStyles = {
  FREE: 'text-emerald-400 bg-emerald-500/10 border-emerald-500/20',
  PRO: 'text-brand-amber bg-brand-amber/10 border-brand-amber/20',
  'PRO+': 'text-violet-400 bg-violet-500/10 border-violet-500/20',
} as const

export function Features() {
  const { t } = useI18n()

  return (
    <section id="features" className="relative py-24 md:py-32">
      <Container>
        <SectionHeader
          index={t.features.index}
          title={t.features.title}
          subtitle={t.features.subtitle}
        />

        <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
          {t.features.items.map((item, i) => {
            const meta = featureMeta[i]
            return (
              <InstrumentCard key={i}>
                {/* Top row: icon + tag */}
                <div className="flex items-start justify-between mb-6">
                  <div className="w-10 h-10 rounded-card bg-surface-400 border border-white/[0.06] flex items-center justify-center text-brand-amber">
                    {meta.icon}
                  </div>
                  <span className={`text-nano font-mono font-semibold tracking-widest uppercase px-2 py-0.5 border rounded-sm ${tagStyles[meta.tag]}`}>
                    {meta.tag}
                  </span>
                </div>

                {/* Content */}
                <h3 className="font-display text-lg font-semibold text-neutral-100 mb-2">
                  {item.title}
                </h3>
                <p className="text-sm text-neutral-400 leading-relaxed">
                  {item.description}
                </p>

                {/* Bottom arrow */}
                <div className="mt-5 flex justify-end">
                  <div className="w-7 h-7 rounded-full border border-white/[0.06] flex items-center justify-center text-neutral-500 group-hover:text-brand-amber group-hover:border-brand-amber/20 transition-colors">
                    <svg className="w-3 h-3" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.5" strokeLinecap="round" strokeLinejoin="round">
                      <line x1="7" y1="17" x2="17" y2="7" />
                      <polyline points="7 7 17 7 17 17" />
                    </svg>
                  </div>
                </div>
              </InstrumentCard>
            )
          })}
        </div>
      </Container>
    </section>
  )
}

/* ── Inline SVG Icons ─────────────────────────────────── */

function MicIcon() {
  return (
    <svg className="w-5 h-5" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
      <rect x="9" y="2" width="6" height="11" rx="3" />
      <path d="M5 10a7 7 0 0 0 14 0" />
      <line x1="12" y1="17" x2="12" y2="21" />
    </svg>
  )
}

function SparklesIcon() {
  return (
    <svg className="w-5 h-5" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
      <path d="M12 2l2.4 7.2L22 12l-7.6 2.8L12 22l-2.4-7.2L2 12l7.6-2.8z" />
    </svg>
  )
}

function LanguageIcon() {
  return (
    <svg className="w-5 h-5" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
      <path d="M5 8l6 6" /><path d="M4 14l6-6 2-3" /><path d="M2 5h12" /><path d="M7 2h1" />
      <path d="M22 22l-5-10-5 10" /><path d="M14 18h6" />
    </svg>
  )
}

function CaptionIcon() {
  return (
    <svg className="w-5 h-5" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
      <rect x="2" y="4" width="20" height="16" rx="2" />
      <path d="M7 15h4" /><path d="M13 15h4" /><path d="M7 11h10" />
    </svg>
  )
}

function ConversationIcon() {
  return (
    <svg className="w-5 h-5" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
      <path d="M21 15a2 2 0 0 1-2 2H7l-4 4V5a2 2 0 0 1 2-2h14a2 2 0 0 1 2 2z" />
    </svg>
  )
}

function FileIcon() {
  return (
    <svg className="w-5 h-5" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
      <path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z" />
      <polyline points="14 2 14 8 20 8" />
    </svg>
  )
}

function ChainIcon() {
  return (
    <svg className="w-5 h-5" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
      <path d="M10 13a5 5 0 0 0 7.54.54l3-3a5 5 0 0 0-7.07-7.07l-1.72 1.71" />
      <path d="M14 11a5 5 0 0 0-7.54-.54l-3 3a5 5 0 0 0 7.07 7.07l1.71-1.71" />
    </svg>
  )
}

function ContextIcon() {
  return (
    <svg className="w-5 h-5" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
      <rect x="2" y="3" width="20" height="14" rx="2" />
      <line x1="8" y1="21" x2="16" y2="21" />
      <line x1="12" y1="17" x2="12" y2="21" />
    </svg>
  )
}

function MemoIcon() {
  return (
    <svg className="w-5 h-5" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
      <path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z" />
      <polyline points="14 2 14 8 20 8" />
      <line x1="16" y1="13" x2="8" y2="13" />
      <line x1="16" y1="17" x2="8" y2="17" />
    </svg>
  )
}