import Link from 'next/link'
import { Trophy, ShieldCheck, Accessibility, Users, Award } from 'lucide-react'
import { Navigation } from '@/components/navigation'
import { Footer } from '@/components/footer'
import { getPublicEvent, getPublicPrizes } from '@/lib/lukenya-api'
import { findPrize, formatMoney, ordinal, type PrizeCategory, type PrizeRow } from '@/lib/event-types'

export const revalidate = 60

type PrizeLine = { place: string; amount: string; highlight?: boolean }

const PLACE = (n: number) => ordinal(n) || String(n)

// Men and women side by side, one row per finishing position.
function rowsFor(category: PrizeCategory, currency: string): { men: PrizeLine[]; women: PrizeLine[] } {
  const men = category.divisions.find((d) => d.division === 'Men')?.places || []
  const women = category.divisions.find((d) => d.division === 'Women')?.places || []
  const positions = Array.from(new Set([...men, ...women].map((p) => p.position))).sort((x, y) => x - y)
  const fmt = (rows: PrizeRow[], pos: number) => {
    const row = rows.find((r) => r.position === pos)
    return row ? (formatMoney(row.amount, currency)?.replace(`${currency} `, '') || '—') : '—'
  }
  return {
    men: positions.map((pos) => ({ place: PLACE(pos), amount: fmt(men, pos), highlight: pos === 1 })),
    women: positions.map((pos) => ({ place: PLACE(pos), amount: fmt(women, pos), highlight: pos === 1 })),
  }
}

const SPECIAL = [
  { division: 'Wheelchair', icon: Accessibility, title: 'Wheelchair Category', description: 'Top finishers in the wheelchair division' },
  { division: 'Corporate Relay', icon: Users, title: 'Corporate Relay', description: 'Fastest corporate relay teams' },
  { division: 'Age Group', icon: Award, title: 'Age Category Awards', description: 'Top finishers in each age group' },
]

function PrizeTable({ 
  title, 
  men, 
  women 
}: { 
  title: string
  men: { place: string; amount: string; highlight?: boolean }[]
  women: { place: string; amount: string; highlight?: boolean }[]
}) {
  return (
    <div className="bg-white rounded-xl shadow-[0_2px_16px_rgba(0,0,0,0.08)] overflow-hidden">
      <div className="bg-[#ffcd05]/10 border-b border-[#ffcd05]/20 px-6 py-4">
        <h3 className="text-xl font-bold text-[#006838]">{title}</h3>
      </div>
      <div className="p-6">
        <table className="w-full">
          <thead>
            <tr className="border-b border-[#e5e7eb]">
              <th className="text-left py-3 font-semibold text-[#111518]">Place</th>
              <th className="text-left py-3 font-semibold text-[#111518]">Men</th>
              <th className="text-left py-3 font-semibold text-[#111518]">Women</th>
            </tr>
          </thead>
          <tbody>
            {men.map((prize, index) => (
              <tr 
                key={index} 
                className={`border-b border-[#e5e7eb] ${
                  prize.highlight ? 'bg-[#ffcd05]/5' : ''
                }`}
              >
                <td className={`py-3 font-semibold ${prize.highlight ? 'text-[#ffcd05]' : 'text-[#111518]'}`}>
                  {prize.place}
                </td>
                <td className={`py-3 font-extrabold text-lg ${
                  prize.highlight ? 'text-[#ffcd05]' : index < 3 ? 'text-[#3bb34a]' : 'text-[#111518]'
                }`}>
                  {prize.amount}
                </td>
                <td className={`py-3 font-extrabold text-lg ${
                  women[index]?.highlight ? 'text-[#ffcd05]' : index < 3 ? 'text-[#3bb34a]' : 'text-[#111518]'
                }`}>
                  {women[index]?.amount}
                </td>
              </tr>
            ))}
          </tbody>
        </table>
      </div>
    </div>
  )
}

function CompactPrizeTable({ 
  title, 
  men, 
  women 
}: { 
  title: string
  men: { place: string; amount: string }[]
  women: { place: string; amount: string }[]
}) {
  return (
    <div className="bg-white rounded-xl shadow-[0_2px_16px_rgba(0,0,0,0.08)] overflow-hidden">
      <div className="bg-[#F5F7FC] border-b border-[#e5e7eb] px-6 py-3">
        <h3 className="text-lg font-bold text-[#006838]">{title}</h3>
      </div>
      <div className="p-4">
        <table className="w-full text-sm">
          <thead>
            <tr className="border-b border-[#e5e7eb]">
              <th className="text-left py-2 font-semibold text-[#111518]">Place</th>
              <th className="text-left py-2 font-semibold text-[#111518]">Men</th>
              <th className="text-left py-2 font-semibold text-[#111518]">Women</th>
            </tr>
          </thead>
          <tbody>
            {men.map((prize, index) => (
              <tr key={index} className="border-b border-[#e5e7eb] last:border-0">
                <td className="py-2 font-semibold text-[#111518]">{prize.place}</td>
                <td className="py-2 font-bold text-[#3bb34a]">{prize.amount}</td>
                <td className="py-2 font-bold text-[#3bb34a]">{women[index]?.amount}</td>
              </tr>
            ))}
          </tbody>
        </table>
      </div>
    </div>
  )
}

export default async function PrizeMoneyPage() {
  const [event, prizes] = await Promise.all([getPublicEvent(), getPublicPrizes()])
  const currency = prizes?.currency || event.currency
  // Races with Men/Women prize rules, in the order the backend sends them (featured first).
  const raceTables = (prizes?.categories || []).filter((c) =>
    c.divisions.some((d) => d.division === 'Men' || d.division === 'Women'),
  )
  const [mainRace, ...otherRaces] = raceTables
  const specials = SPECIAL.map((s) => ({ ...s, amount: findPrize(prizes, s.division, 1) }))
  return (
    <div className="min-h-screen">
      <Navigation />

      {/* Page Hero */}
      <section className="bg-[#006838] pt-20">
        <div className="max-w-5xl mx-auto px-4 text-center py-16 md:py-20">
          <span className="text-[#ffcd05] font-semibold text-xs uppercase tracking-[0.12em] mb-4 block">
            Compete for Real Rewards
          </span>
          <h1 className="text-3xl md:text-4xl lg:text-5xl font-extrabold text-white mb-4">
            Prize Money
          </h1>
          <p className="text-white/80 text-lg max-w-2xl mx-auto">
            {raceTables.length ? `Structured prize money across ${raceTables.length} ${raceTables.length === 1 ? 'race' : 'races'}, paid on race day.` : 'Structured prize money, paid on race day.'}
          </p>
        </div>
      </section>

      {/* Main race */}
      <section className="bg-white py-16 md:py-24">
        <div className="max-w-4xl mx-auto px-4">
          <div className="text-center mb-12">
            <Trophy className="w-12 h-12 text-[#ffcd05] mx-auto mb-4" />
            <span className="text-[#006838] font-semibold text-xs uppercase tracking-[0.12em] mb-2 block">
              Top Prize Category
            </span>
            <h2 className="text-3xl md:text-4xl font-bold text-[#006838]">
              {mainRace ? `${mainRace.category_name}, ${mainRace.distance_label}` : 'Prize structure'}
            </h2>
          </div>

          {mainRace ? (
            <PrizeTable title={`${mainRace.category_name} prize structure (${currency})`} {...rowsFor(mainRace, currency)} />
          ) : (
            <p className="text-center text-[#6b7280] text-lg">
              Prize amounts for each race are published here before entries open.
            </p>
          )}
        </div>
      </section>

      {otherRaces.length > 0 && (
        <section className="bg-[#F5F7FC] py-16 md:py-24">
          <div className="max-w-5xl mx-auto px-4">
            <div className="text-center mb-12">
              <h2 className="text-2xl md:text-3xl font-bold text-[#006838]">Other races</h2>
            </div>
            <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
              {otherRaces.map((race) => (
                <CompactPrizeTable
                  key={race.race_category}
                  title={`${race.category_name} (${race.distance_label})`}
                  {...rowsFor(race, currency)}
                />
              ))}
            </div>
          </div>
        </section>
      )}

      {/* Special Categories */}
      <section className="bg-[#006838] py-16 md:py-24">
        <div className="max-w-5xl mx-auto px-4">
          <div className="text-center mb-12">
            <span className="text-[#ffcd05] font-semibold text-xs uppercase tracking-[0.12em] mb-2 block">
              Special Categories
            </span>
            <h2 className="text-3xl md:text-4xl font-bold text-white">
              Additional Prize Categories
            </h2>
          </div>

          <div className="grid grid-cols-1 md:grid-cols-3 gap-6">
            {specials.map((category, index) => (
              <div key={index} className="bg-white rounded-xl p-6 text-center">
                <category.icon className="w-10 h-10 text-[#006838] mx-auto mb-4" />
                <h3 className="font-bold text-[#111518] mb-2">{category.title}</h3>
                <p className="text-[#ffcd05] font-extrabold text-2xl mb-2">{formatMoney(category.amount, currency) || 'To be announced'}</p>
                <p className="text-[#6b7280] text-sm">{category.description}</p>
              </div>
            ))}
          </div>
        </div>
      </section>

      {/* Prize Payment Info */}
      <section className="bg-[#F5F7FC] py-12">
        <div className="max-w-4xl mx-auto px-4">
          <div className="flex flex-col md:flex-row items-center justify-center gap-4 text-center md:text-left">
            <div className="flex items-center gap-2">
              <ShieldCheck className="w-5 h-5 text-[#006838]" />
              <span className="text-[#111518] font-semibold text-sm">Sporthive Certified Results</span>
            </div>
            <span className="hidden md:block text-[#e5e7eb]">|</span>
            <p className="text-[#6b7280] text-sm">
              Prize money paid on race day. Winners must present valid ID. All prizes subject to race rules.
            </p>
          </div>
        </div>
      </section>

      {/* CTA Section */}
      <section className="bg-[#006838] py-16">
        <div className="max-w-3xl mx-auto px-4 text-center">
          <h2 className="text-3xl md:text-4xl font-extrabold text-white mb-4">
            Ready to Compete?
          </h2>
          <p className="text-white/80 text-lg mb-8">
            Register now and compete for prize money at Kenya&apos;s environmental marathon.
          </p>
          <Link
            href="/registration"
            className="inline-block bg-[#ffcd05] text-[#111518] font-bold text-sm px-10 py-4 rounded-lg hover:bg-[#c4930f] transition-colors duration-200"
          >
            REGISTER NOW
          </Link>
        </div>
      </section>

      <Footer />
    </div>
  )
}