'use client'

import { useState } from 'react'
import { Language, PitchFeature, PitchCompetitor } from '@/lib/types'
import { t } from '@/lib/i18n'
import {
  ChevronDown, ChevronRight, Globe, Building2, Users, TrendingUp,
  DollarSign, Cpu, Star, Check, X, Minus, Shield,
} from 'lucide-react'
import GradientText from '../ui/GradientText'
import FadeInView from '../ui/FadeInView'
import GlassCard from '../ui/GlassCard'
import BrandName from '../ui/BrandName'
import {
  type FeatureStatus, type ComparisonFeature,
  EXTENDED_COMPETITORS, ALL_FEATURES, DACH_NOTE, PRICING_COMPARISON, APPSEC_COMPETITORS, APPSEC_FEATURES,
} from './CompetitionSlide.data'
import { StatusIcon, AiBadge, ratio, CompetitorCard, FeatureTable, AppSecCard, AppSecFeatureTable } from './CompetitionSlide.parts'

interface CompetitionSlideProps {
  lang: Language
  features: PitchFeature[]
  competitors: PitchCompetitor[]
}

// ─── Helpers ───────────────────────────────────────────────────────────────────

// ─── Section Accordion ─────────────────────────────────────────────────────────

function SectionHeader({
  label,
  count,
  open,
  onToggle,
  accent,
}: {
  label: string
  count: number
  open: boolean
  onToggle: () => void
  accent?: string
}) {
  return (
    <button
      onClick={onToggle}
      className="w-full flex items-center gap-2 py-2 px-3 bg-white/[0.03] hover:bg-white/[0.06] border border-white/5 rounded-lg transition-colors text-left"
    >
      {open ? <ChevronDown className="w-4 h-4 text-white/40 shrink-0" /> : <ChevronRight className="w-4 h-4 text-white/40 shrink-0" />}
      <span className={`text-sm font-semibold ${accent || 'text-white/80'}`}>{label}</span>
      <span className="text-xs text-white/30 ml-1">({count})</span>
    </button>
  )
}

// ─── Component ─────────────────────────────────────────────────────────────────

type ViewTab = 'overview' | 'features' | 'pricing' | 'appsec'

export default function CompetitionSlide({ lang, features, competitors }: CompetitionSlideProps) {
  const i = t(lang)
  const [activeTab, setActiveTab] = useState<ViewTab>('overview')
  const [openSections, setOpenSections] = useState<Set<string>>(new Set(['top5']))

  const toggleSection = (key: string) => {
    setOpenSections(prev => {
      const next = new Set(prev)
      if (next.has(key)) next.delete(key)
      else next.add(key)
      return next
    })
  }

  const top5 = ALL_FEATURES.filter(f => f.isDiff)
  const usps = ALL_FEATURES.filter(f => f.isUSP)
  const allFeatures = ALL_FEATURES

  const competitorCols = ['bp', 'vanta', 'drata', 'sprinto', 'proliance', 'dataguard', 'heydata'] as const
  const competitorLabels = ['ComplAI', 'Vanta', 'Drata', 'Sprinto', 'Proliance', 'DataGuard', 'heyData']

  const featureCount = ALL_FEATURES.length
  const uspCount = usps.length
  const subtitle = lang === 'de'
    ? `${featureCount} Features, ${uspCount} USPs — kein Anbieter kombiniert DSGVO + Code-Security + Self-Hosted KI`
    : `${featureCount} features, ${uspCount} USPs — no provider combines GDPR + code security + self-hosted AI`

  return (
    <div className="max-h-[calc(100vh-120px)] overflow-y-auto pr-1 pb-4 scrollbar-thin">
      {/* Header */}
      <FadeInView className="text-center mb-4">
        <h2 className="text-3xl md:text-4xl font-bold mb-2">
          <GradientText>{i.competition.title}</GradientText>
        </h2>
        <p className="text-sm text-white/50 max-w-3xl mx-auto">{subtitle}</p>
      </FadeInView>

      {/* Tab Bar */}
      <FadeInView delay={0.15} className="flex justify-center gap-2 mb-4 flex-wrap">
        {([
          { key: 'overview' as ViewTab, de: 'Überblick & Vergleich', en: 'Overview & Comparison' },
          { key: 'features' as ViewTab, de: 'Feature-Matrix (Detail)', en: 'Feature Matrix (Detail)' },
          { key: 'pricing' as ViewTab, de: 'Pricing-Vergleich', en: 'Pricing Comparison' },
          { key: 'appsec' as ViewTab, de: 'Pentesting & AppSec', en: 'Pentesting & AppSec' },
        ]).map(tab => (
          <button
            key={tab.key}
            onClick={() => setActiveTab(tab.key)}
            className={`px-4 py-1.5 rounded-full text-xs font-medium transition-all ${
              activeTab === tab.key
                ? 'bg-indigo-500/20 text-indigo-300 border border-indigo-500/30'
                : 'bg-white/[0.04] text-white/40 border border-white/5 hover:bg-white/[0.08] animate-[pulse_3s_ease-in-out_infinite]'
            }`}
          >
            {lang === 'de' ? tab.de : tab.en}
          </button>
        ))}
      </FadeInView>

      {/* ─── Tab: Overview ─── */}
      {activeTab === 'overview' && (
        <FadeInView delay={0.2}>
          {/* Competitor Profiles */}
          <div className="mb-4">
            {/* International */}
            <div className="flex items-center gap-2 mb-2">
              <Globe className="w-3.5 h-3.5 text-blue-400" />
              <span className="text-xs font-semibold text-blue-400">{lang === 'de' ? 'International' : 'International'}</span>
            </div>
            <div className="grid grid-cols-3 gap-2 mb-3">
              {EXTENDED_COMPETITORS.filter(c => c.isInternational).map(c => (
                <CompetitorCard key={c.name} competitor={c} lang={lang} />
              ))}
            </div>

            {/* DACH */}
            <div className="flex items-center gap-2 mb-2">
              <Building2 className="w-3.5 h-3.5 text-emerald-400" />
              <span className="text-xs font-semibold text-emerald-400">DACH</span>
            </div>
            <div className="grid grid-cols-3 gap-2 mb-3">
              {EXTENDED_COMPETITORS.filter(c => !c.isInternational).map(c => (
                <CompetitorCard key={c.name} competitor={c} lang={lang} />
              ))}
            </div>
          </div>

          {/* Efficiency Ratios */}
          <GlassCard className="!p-3 mb-4" hover={false}>
            <h4 className="text-xs font-semibold text-white/60 mb-2 flex items-center gap-1.5">
              <TrendingUp className="w-3.5 h-3.5" />
              {lang === 'de' ? 'Effizienz-Kennzahlen' : 'Efficiency Ratios'}
            </h4>
            <div className="overflow-x-auto">
              <table className="w-full text-[11px]">
                <thead>
                  <tr className="border-b border-white/10">
                    <th className="text-left py-1.5 px-2 text-white/40 font-medium">{lang === 'de' ? 'Kennzahl' : 'Metric'}</th>
                    {EXTENDED_COMPETITORS.map(c => (
                      <th key={c.name} className="py-1.5 px-2 text-white/50 font-medium text-center">{c.flag} {c.name}</th>
                    ))}
                  </tr>
                </thead>
                <tbody>
                  <tr className="border-b border-white/5">
                    <td className="py-1.5 px-2 text-white/50">{lang === 'de' ? 'Umsatz / Mitarbeiter' : 'Revenue / Employee'}</td>
                    {EXTENDED_COMPETITORS.map(c => (
                      <td key={c.name} className="py-1.5 px-2 text-center text-white/70">
                        ${ratio(c.revenueNum, c.employees)}
                      </td>
                    ))}
                  </tr>
                  <tr className="border-b border-white/5">
                    <td className="py-1.5 px-2 text-white/50">{lang === 'de' ? 'Kunden / Mitarbeiter' : 'Customers / Employee'}</td>
                    {EXTENDED_COMPETITORS.map(c => (
                      <td key={c.name} className="py-1.5 px-2 text-center text-white/70">
                        {(c.customers / c.employees).toFixed(0)}
                      </td>
                    ))}
                  </tr>
                  <tr>
                    <td className="py-1.5 px-2 text-white/50">{lang === 'de' ? 'Mitarbeiter' : 'Employees'}</td>
                    {EXTENDED_COMPETITORS.map(c => (
                      <td key={c.name} className="py-1.5 px-2 text-center text-white/70">
                        {c.employees.toLocaleString()}
                      </td>
                    ))}
                  </tr>
                </tbody>
              </table>
            </div>
          </GlassCard>

          {/* DACH Landscape Note */}
          <div className="text-[11px] text-white/30 text-center italic">
            {DACH_NOTE[lang]}
          </div>
        </FadeInView>
      )}

      {/* ─── Tab: Feature Matrix ─── */}
      {activeTab === 'features' && (
        <FadeInView delay={0.2}>
          <div className="space-y-2">
            {/* All Features */}
            <div>
              <SectionHeader
                label={lang === 'de' ? 'Alle Features' : 'All Features'}
                count={allFeatures.length}
                open={openSections.has('all')}
                onToggle={() => toggleSection('all')}
              />
              {openSections.has('all') && (
                <FeatureTable features={allFeatures} lang={lang} cols={competitorCols} labels={competitorLabels} />
              )}
            </div>

            {/* USPs */}
            <div>
              <SectionHeader
                label={lang === 'de' ? 'USP — nur COMPLAI' : 'USP — COMPLAI only'}
                count={usps.length}
                open={openSections.has('usp')}
                onToggle={() => toggleSection('usp')}
                accent="text-indigo-400"
              />
              {openSections.has('usp') && (
                <FeatureTable features={usps} lang={lang} cols={competitorCols} labels={competitorLabels} highlight />
              )}
            </div>
          </div>

          {/* Score Summary */}
          <div className="mt-4 flex items-center justify-center gap-6">
            {[
              { name: 'ComplAI', score: ALL_FEATURES.filter(f => f.bp === true).length, color: 'text-indigo-400' },
              { name: 'Vanta', score: ALL_FEATURES.filter(f => f.vanta === true).length, color: 'text-white/50' },
              { name: 'Drata', score: ALL_FEATURES.filter(f => f.drata === true).length, color: 'text-white/50' },
              { name: 'Sprinto', score: ALL_FEATURES.filter(f => f.sprinto === true).length, color: 'text-white/50' },
              { name: 'Proliance', score: ALL_FEATURES.filter(f => f.proliance === true).length, color: 'text-white/50' },
              { name: 'DataGuard', score: ALL_FEATURES.filter(f => f.dataguard === true).length, color: 'text-white/50' },
              { name: 'heyData', score: ALL_FEATURES.filter(f => f.heydata === true).length, color: 'text-white/50' },
            ].map(item => (
              <div key={item.name} className="text-center">
                <div className={`text-lg font-bold ${item.color}`}>{item.score}/{ALL_FEATURES.length}</div>
                <div className="text-[10px] text-white/40">{item.name}</div>
              </div>
            ))}
          </div>
        </FadeInView>
      )}

      {/* ─── Tab: Pricing ─── */}
      {activeTab === 'pricing' && (
        <FadeInView delay={0.2}>
          <div className="overflow-x-auto">
            <table className="w-full text-[11px] border-collapse">
              <thead>
                <tr className="border-b border-white/10">
                  <th className="text-left py-2 px-2 text-white/40 font-medium min-w-[90px]">{lang === 'de' ? 'Anbieter' : 'Provider'}</th>
                  <th className="py-2 px-1.5 text-white/40 font-medium text-center">{lang === 'de' ? 'Modell' : 'Model'}</th>
                  <th className="py-2 px-1.5 text-white/40 font-medium text-center">{lang === 'de' ? 'Einstieg' : 'Entry'}</th>
                  <th className="py-2 px-1.5 text-white/40 font-medium text-center">Mid</th>
                  <th className="py-2 px-1.5 text-white/40 font-medium text-center">Enterprise</th>
                  <th className="py-2 px-1.5 text-white/40 font-medium text-center">Setup</th>
                  <th className="py-2 px-1.5 text-white/40 font-medium text-center">{lang === 'de' ? 'Öffentlich' : 'Public'}</th>
                </tr>
              </thead>
              <tbody>
                {PRICING_COMPARISON.map((cp) => (
                  <tr key={cp.name} className={`border-b border-white/5 ${cp.isBP ? 'bg-indigo-500/5' : ''}`}>
                    <td className="py-2 px-2">
                      <div className="flex items-center gap-1.5">
                        <span>{cp.flag}</span>
                        <span className={`font-semibold ${cp.isBP ? 'text-indigo-400' : 'text-white/70'}`}>
                          {cp.isBP ? <BrandName className="text-[11px]" /> : cp.name}
                        </span>
                      </div>
                    </td>
                    <td className="py-2 px-1.5 text-center">
                      <span className={`text-[10px] px-1.5 py-0.5 rounded-full ${cp.model === 'Self-Hosted' ? 'bg-green-500/15 text-green-400' : 'bg-white/5 text-white/40'}`}>
                        {cp.model}
                      </span>
                    </td>
                    {cp.tiers.map((tier, idx) => (
                      <td key={idx} className="py-2 px-1.5 text-center">
                        <div className={`font-semibold ${cp.isBP ? 'text-indigo-300' : 'text-white/70'}`}>{tier.price}</div>
                        <div className="text-[10px] text-white/30">{tier.annual}</div>
                        <div className="text-[10px] text-white/25 mt-0.5">{lang === 'de' ? tier.notes.de : tier.notes.en}</div>
                      </td>
                    ))}
                    <td className="py-2 px-1.5 text-center text-white/40">{cp.setupFee}</td>
                    <td className="py-2 px-1.5 text-center">
                      {cp.publicPricing
                        ? <Check className="w-3.5 h-3.5 text-green-400 mx-auto" />
                        : <X className="w-3.5 h-3.5 text-white/15 mx-auto" />
                      }
                    </td>
                  </tr>
                ))}
              </tbody>
            </table>
          </div>

          <p className="text-[10px] text-white/25 text-center mt-3 italic">
            {lang === 'de'
              ? '~ = geschätzte Preise (nicht öffentlich). Alle Preise ohne MwSt. Stand: Q1 2026.'
              : '~ = estimated pricing (not public). All prices excl. VAT. As of Q1 2026.'}
          </p>
        </FadeInView>
      )}

      {/* ─── Tab: AppSec / Pentesting ─── */}
      {activeTab === 'appsec' && (
        <FadeInView delay={0.2}>
          {/* Intro */}
          <GlassCard className="!p-3 mb-4" hover={false}>
            <div className="flex items-start gap-2">
              <Shield className="w-4 h-4 text-red-400 mt-0.5 shrink-0" />
              <div className="text-[11px]">
                <span className="text-white/80 font-semibold">
                  {lang === 'de' ? 'Warum ein 2. Wettbewerbsvergleich?' : 'Why a 2nd competitive comparison?'}
                </span>
                <p className="text-white/50 mt-1 leading-relaxed">
                  {lang === 'de'
                    ? 'Kein Compliance-Anbieter (Vanta, Drata, etc.) bietet DAST, SAST oder LLM-basierte Code-Fixes. Kein AppSec-Anbieter (Snyk, Veracode, etc.) bietet DSGVO/AI-Act-Compliance. COMPLAI ist die einzige Plattform, die beides kombiniert.'
                    : 'No compliance vendor (Vanta, Drata, etc.) offers DAST, SAST, or LLM-based code fixes. No AppSec vendor (Snyk, Veracode, etc.) offers GDPR/AI Act compliance. COMPLAI is the only platform combining both.'}
                </p>
              </div>
            </div>
          </GlassCard>

          {/* AppSec Competitor Cards */}
          <div className="mb-4">
            <div className="flex items-center gap-2 mb-2">
              <Shield className="w-3.5 h-3.5 text-red-400" />
              <span className="text-xs font-semibold text-red-400">{lang === 'de' ? 'AppSec / Pentesting Anbieter' : 'AppSec / Pentesting Providers'}</span>
            </div>
            <div className="grid grid-cols-4 gap-2">
              {APPSEC_COMPETITORS.map(c => (
                <AppSecCard key={c.name} competitor={c} lang={lang} />
              ))}
            </div>
          </div>

          {/* Efficiency Ratios — AppSec */}
          <GlassCard className="!p-3 mt-4 mb-4" hover={false}>
            <h4 className="text-xs font-semibold text-white/60 mb-2 flex items-center gap-1.5">
              <TrendingUp className="w-3.5 h-3.5" />
              {lang === 'de' ? 'Effizienz-Kennzahlen' : 'Efficiency Ratios'}
            </h4>
            <div className="overflow-x-auto">
              <table className="w-full text-[11px]">
                <thead>
                  <tr className="border-b border-white/10">
                    <th className="text-left py-1.5 px-2 text-white/40 font-medium">{lang === 'de' ? 'Kennzahl' : 'Metric'}</th>
                    {APPSEC_COMPETITORS.map(c => (
                      <th key={c.name} className="py-1.5 px-2 text-white/50 font-medium text-center">{c.flag} {c.name}</th>
                    ))}
                  </tr>
                </thead>
                <tbody>
                  <tr className="border-b border-white/5">
                    <td className="py-1.5 px-2 text-white/50">{lang === 'de' ? 'Umsatz / Mitarbeiter' : 'Revenue / Employee'}</td>
                    {APPSEC_COMPETITORS.map(c => (
                      <td key={c.name} className="py-1.5 px-2 text-center text-white/70">
                        ${ratio(c.revenueNum, c.employees)}
                      </td>
                    ))}
                  </tr>
                  <tr className="border-b border-white/5">
                    <td className="py-1.5 px-2 text-white/50">{lang === 'de' ? 'Mitarbeiter' : 'Employees'}</td>
                    {APPSEC_COMPETITORS.map(c => (
                      <td key={c.name} className="py-1.5 px-2 text-center text-white/70">
                        {c.employees.toLocaleString()}
                      </td>
                    ))}
                  </tr>
                </tbody>
              </table>
            </div>
          </GlassCard>

          {/* AppSec Feature Matrix */}
          <div className="space-y-2 mt-4">
            <div>
              <SectionHeader
                label={lang === 'de' ? 'Alle AppSec Features' : 'All AppSec Features'}
                count={APPSEC_FEATURES.length}
                open={openSections.has('appsec-all')}
                onToggle={() => toggleSection('appsec-all')}
              />
              {openSections.has('appsec-all') && (
                <AppSecFeatureTable features={APPSEC_FEATURES} lang={lang} />
              )}
            </div>
          </div>

          {/* Score Summary */}
          <div className="mt-4 flex items-center justify-center gap-4 flex-wrap">
            {[
              { name: 'ComplAI', score: APPSEC_FEATURES.filter(f => f.bp === true).length, color: 'text-indigo-400' },
              { name: 'Snyk', score: APPSEC_FEATURES.filter(f => f.snyk === true).length, color: 'text-white/50' },
              { name: 'Veracode', score: APPSEC_FEATURES.filter(f => f.veracode === true).length, color: 'text-white/50' },
              { name: 'Checkmarx', score: APPSEC_FEATURES.filter(f => f.checkmarx === true).length, color: 'text-white/50' },
              { name: 'SonarSrc', score: APPSEC_FEATURES.filter(f => f.sonar === true).length, color: 'text-white/50' },
              { name: 'Semgrep', score: APPSEC_FEATURES.filter(f => f.semgrep === true).length, color: 'text-white/50' },
              { name: 'Pentera', score: APPSEC_FEATURES.filter(f => f.pentera === true).length, color: 'text-white/50' },
              { name: 'Invicti', score: APPSEC_FEATURES.filter(f => f.invicti === true).length, color: 'text-white/50' },
              { name: 'Intruder', score: APPSEC_FEATURES.filter(f => f.intruder === true).length, color: 'text-white/50' },
            ].map(item => (
              <div key={item.name} className="text-center">
                <div className={`text-lg font-bold ${item.color}`}>{item.score}/{APPSEC_FEATURES.length}</div>
                <div className="text-[10px] text-white/40">{item.name}</div>
              </div>
            ))}
          </div>
        </FadeInView>
      )}
    </div>
  )
}