import { useEffect, useRef, useState } from 'react'
import {
  SedaMark,
  ArrowRight,
  ArrowUp,
  Caret,
  CHAINS,
  DistributedGlobal,
  Coinbase,
  Reciprocal,
  Uncorrelated,
} from './logos.jsx'

import heroTopLeft from './assets/hero-topleft.jpg'
import heroLeft from './assets/hero-left.jpg'
import heroTopCenter from './assets/hero-topcenter.jpg'
import heroMid from './assets/hero-mid.jpg'
import heroRight from './assets/hero-right.jpg'
import feat1 from './assets/feat-1.jpg'
import feat2 from './assets/feat-2.jpg'
import feat3 from './assets/feat-3.jpg'
import feat4 from './assets/feat-4.jpg'
import feat5 from './assets/feat-5.jpg'
import cardImg1 from './assets/card-img-1.jpg'
import cardImg2 from './assets/card-img-2.jpg'
import cardImg3 from './assets/card-img-3.jpg'
import footerWave from './assets/footer-wave.jpg'

const scrollToId = (id) => {
  const el = document.getElementById(id)
  if (el) el.scrollIntoView({ behavior: 'smooth', block: 'start' })
}

/* ---------------------------------- nav ---------------------------------- */

function Nav() {
  const [learnOpen, setLearnOpen] = useState(false)
  const learnRef = useRef(null)

  useEffect(() => {
    const close = (e) => {
      if (learnRef.current && !learnRef.current.contains(e.target)) setLearnOpen(false)
    }
    document.addEventListener('click', close)
    return () => document.removeEventListener('click', close)
  }, [])

  const go = (id) => (e) => {
    e.preventDefault()
    setLearnOpen(false)
    scrollToId(id)
  }

  return (
    <header className="nav">
      <a
        className="nav-logo"
        href="#top"
        onClick={(e) => {
          e.preventDefault()
          window.scrollTo({ top: 0, behavior: 'smooth' })
        }}
      >
        <SedaMark />
        <span className="nav-wordmark">seda</span>
      </a>

      <nav className="nav-links nav-links-left">
        <a href="#network" onClick={go('network')}>Developers</a>
        <a href="#audiences" onClick={go('audiences')}>Validators</a>
      </nav>

      <div className="nav-spacer" />

      <nav className="nav-links nav-links-right">
        <a href="#pillars" onClick={go('pillars')}>Primer</a>
        <a href="#ecosystems" onClick={go('ecosystems')}>Community</a>
        <span className={`nav-learn ${learnOpen ? 'open' : ''}`} ref={learnRef}>
          <button
            type="button"
            onClick={(e) => {
              e.stopPropagation()
              setLearnOpen((v) => !v)
            }}
          >
            Learn <Caret />
          </button>
          {learnOpen && (
            <div className="nav-menu">
              <a href="#network" onClick={go('network')}>About the network</a>
              <a href="#pillars" onClick={go('pillars')}>Why SEDA</a>
              <a href="#footer" onClick={go('footer')}>FAQs</a>
            </div>
          )}
        </span>
        <a className="btn btn-violet btn-nav" href="#footer" onClick={go('footer')}>
          Litepaper
        </a>
      </nav>
    </header>
  )
}

/* ---------------------------------- hero --------------------------------- */

function Hero() {
  return (
    <section className="hero" id="top">
      <img className="hx hx-topleft" src={heroTopLeft} alt="" />
      <img className="hx hx-left" src={heroLeft} alt="" />
      <img className="hx hx-topcenter" src={heroTopCenter} alt="" />
      <img className="hx hx-mid" src={heroMid} alt="" />
      <img className="hx hx-right" src={heroRight} alt="" />

      <Nav />

      <h1 className="hero-title">
        A Foundation
        <br />
        for Data in
        <br />
        web3
      </h1>

      <div className="hero-cta">
        <a className="btn btn-violet" href="#footer" onClick={(e) => { e.preventDefault(); scrollToId('footer') }}>
          Litepaper <ArrowRight size={13} />
        </a>
        <a className="btn btn-ghost" href="#pillars" onClick={(e) => { e.preventDefault(); scrollToId('pillars') }}>
          Primer <ArrowRight size={13} />
        </a>
      </div>

      <p className="hero-para">
        SEDA creates a standard for
        <br />
        data interoperability enabling
        <br />
        the future of connectivity.
      </p>

      <div className="hero-backed">Backed by:</div>
      <div className="hero-backers">
        <Uncorrelated />
        <DistributedGlobal />
        <Coinbase />
        <Reciprocal />
      </div>
    </section>
  )
}

/* --------------------------------- stats --------------------------------- */

const STATS = [
  ['+$152B', 'Total value enabled'],
  ['+12M', 'Data-feed updates'],
  ['+24', 'Networks we support'],
  ['+$22M', 'Raised'],
]

function Stats() {
  return (
    <section className="stats">
      <div className="container">
        <div className="hr hr-fade-both" />
        <div className="stats-grid">
          {STATS.map(([n, label]) => (
            <div className="stat" key={label}>
              <div className="stat-n">{n}</div>
              <div className="stat-label">{label}</div>
            </div>
          ))}
        </div>
        <div className="hr hr-fade-right" />
      </div>
    </section>
  )
}

/* -------------------------------- features ------------------------------- */

const FEATURES = [
  {
    img: feat1,
    lines: ['SEDA is a base network that forms a', 'foundational layer below blockchain', 'ecosystems as the HTTP of web3.'],
  },
  {
    img: feat2,
    lines: [
      'SEDA seamlessly integrates with any',
      'Blockchain Network using an open-',
      'source relay smart contract, making',
      'deployment fast and secure.',
    ],
  },
  {
    img: feat3,
    lines: [
      'The SEDA Network is permissionless',
      'by design. Information and value can',
      'be validated, exchanged, relayed, and',
      'requested by any entity across any',
      'network with shared security.',
    ],
  },
  {
    img: feat4,
    lines: ['The SEDA Network is built with the', 'Cosmos SDK, creating a robust and', 'decentralized validator set.'],
  },
  {
    img: feat5,
    lines: ['SEDA can support any EVM Network,', 'including non-EVM Networks, within a', 'swift timeframe of just 24 hours.'],
  },
]

// desktop-measured offsets (px from section top) — collapse to flow on mobile
const FEAT_POS = [
  { img: [342, -560, 520, 470], txt: 604, num: [572, 66] },
  { img: [892, -560, 520, 480], txt: 1102, num: [1043, 338] },
  { img: [1402, -540, 500, 470], txt: 1630, num: [1542, 84] },
  { img: [1982, -540, 500, 420], txt: 2190, num: [2091, 338] },
  { img: [2562, -560, 520, 510], txt: 2688, num: [2599, 74] },
]

function Features() {
  return (
    <section className="features" id="network">
      {FEATURES.map((f, i) => {
        const p = FEAT_POS[i]
        return (
          <div className="feature" key={i}>
            <img
              className="feature-img"
              src={f.img}
              alt=""
              style={{
                top: p.img[0],
                left: `calc(50% + ${p.img[1]}px)`,
                width: p.img[2],
                height: p.img[3],
              }}
            />
            <div className="feature-num" style={{ top: p.num[0], left: `calc(50% + ${p.num[1]}px)` }}>
              {i + 1}
            </div>
            <p className="feature-text" style={{ top: p.txt }}>
              {f.lines.map((line, j) => (
                <span key={j}>
                  {line}
                  {j < f.lines.length - 1 && <br />}
                </span>
              ))}
            </p>
          </div>
        )
      })}
    </section>
  )
}

/* -------------------------------- pillars -------------------------------- */

const PILLARS = [
  {
    title: 'Secure',
    hue: 0,
    lines: ['Every step in the SEDA', 'network is strongly secured', 'by cryptographic primitives', 'and economic guarantees.'],
  },
  {
    title: 'Fast',
    hue: 160,
    lines: ['Provides low latency for', 'queried data based on a', 'Proof-of-Stake (PoS)', 'consensus mechanism.'],
  },
  {
    title: 'Permissionless',
    hue: 300,
    lines: ['No central authority controls', 'the data being transported', 'from the source to the', 'destination.'],
  },
]

function Pillars() {
  return (
    <section className="pillars-wrap" id="pillars-cards">
      <div className="container">
        <div className="pillars">
          {PILLARS.map((p) => (
            <div className="pillar" key={p.title}>
              <span className="pillar-icon" style={{ filter: `hue-rotate(${p.hue}deg) saturate(1.15)` }} />
              <h3>{p.title}</h3>
              <p>
                {p.lines.map((line, j) => (
                  <span key={j}>
                    {line}
                    {j < p.lines.length - 1 && <br />}
                  </span>
                ))}
              </p>
            </div>
          ))}
        </div>
      </div>
    </section>
  )
}

/* ------------------------------- ecosystems ------------------------------ */

const ROW1 = ['Algorand', 'Arbitrum', 'Aurora', 'avalanche', 'Binance', 'Cardano', 'Sui', 'Aptos']
const ROW2 = ['Sui', 'Aptos', 'Algorand', 'Arbitrum', 'Aurora', 'avalanche', 'Binance', 'Cardano']

function Ecosystems() {
  return (
    <section className="eco" id="ecosystems">
      <div className="container">
        <h2 className="eco-title">
          Our expanding network
          <br />
          of ecosystems
        </h2>
      </div>
      <div className="eco-grid">
        <div className="eco-row eco-row-1">
          {ROW1.map((name, i) => (
            <div className="eco-card" key={name + i}>
              <span className="eco-icon">{CHAINS[name]}</span>
              <span className="eco-name">{name}</span>
            </div>
          ))}
        </div>
        <div className="eco-row eco-row-2">
          {ROW2.map((name, i) => (
            <div className="eco-card" key={name + i}>
              <span className="eco-icon">{CHAINS[name]}</span>
              <span className="eco-name">{name}</span>
            </div>
          ))}
        </div>
      </div>
    </section>
  )
}

/* ---------------------------- audience cards ----------------------------- */

const AUDIENCES = [
  { title: ['For', 'Developers'], img: cardImg1, target: 'network' },
  { title: ['For', 'Validators'], img: cardImg2, target: 'ecosystems' },
  { title: ['For', 'Community'], img: cardImg3, target: 'footer' },
]

function Audiences() {
  return (
    <section className="audiences" id="audiences">
      <div className="container">
        <div className="aud-grid">
          {AUDIENCES.map((a) => (
            <div className="aud-card" key={a.title[1]}>
              <h3>
                {a.title[0]}
                <br />
                {a.title[1]}
              </h3>
              <img src={a.img} alt="" />
              <button
                type="button"
                className="aud-btn"
                aria-label={`${a.title[0]} ${a.title[1]}`}
                onClick={() => scrollToId(a.target)}
              >
                <ArrowRight size={16} color="#111" />
              </button>
            </div>
          ))}
        </div>
      </div>
    </section>
  )
}

/* --------------------------------- footer -------------------------------- */

const FOOTER_COLS = [
  { head: 'Build', links: [['Developers', 'network'], ['Validators', 'audiences'], ['Primer', 'pillars']] },
  {
    head: 'Learn',
    links: [
      ['About', 'top'],
      ['FAQs', 'pillars'],
      ['Ecosystem', 'ecosystems'],
      ['Careers', 'footer', 'hiring'],
      ['Contact us', 'footer'],
      ['Press & brand', 'footer'],
    ],
  },
  {
    head: 'Community',
    links: [['Podcast', 'top'], ['Blog', 'network'], ['Twitter', 'top'], ['Telegram', 'top'], ['Discord', 'top']],
  },
  {
    head: 'Token',
    links: [
      ['Explorer', 'top', 'soon'],
      ['FLX staking', 'top'],
      ['Etherscan', 'top'],
      ['Coingecko', 'top'],
      ['Coinmarketcap', 'top'],
    ],
  },
]

const MARQUEE = Array.from({ length: 4 })

function Footer() {
  return (
    <footer className="footer-panel" id="footer">
      <div className="marquee">
        <div className="marquee-line">
          {MARQUEE.map((_, i) => (
            <span key={i}>
              {i === 0 ? 'TRUSTLESS ' : 'THE TRUSTLESS '}
              <em>DATA&nbsp;LAYER.</em>{' '}
            </span>
          ))}
        </div>
      </div>

      <img className="footer-wave" src={footerWave} alt="" />

      <div className="footer-links">
        {FOOTER_COLS.map((col) => (
          <div className="fcol" key={col.head}>
            <div className="fhead">{col.head}</div>
            <ul>
              {col.links.map(([label, target, pill]) => (
                <li key={label}>
                  <a
                    href={`#${target}`}
                    onClick={(e) => {
                      e.preventDefault()
                      if (target === 'top') window.scrollTo({ top: 0, behavior: 'smooth' })
                      else scrollToId(target)
                    }}
                  >
                    {label}
                  </a>
                  {pill === 'hiring' && <span className="pill pill-hiring">We’re hiring!</span>}
                  {pill === 'soon' && <span className="pill pill-soon">Coming soon</span>}
                </li>
              ))}
            </ul>
          </div>
        ))}
      </div>

      <div className="footer-bar">
        <div className="fbar-left">
          <a href="#top" onClick={(e) => e.preventDefault()}>Privacy</a>
          <a href="#top" onClick={(e) => e.preventDefault()}>Terms</a>
        </div>
        <div className="fbar-center">©2023 SEDA. All rights reserved.</div>
        <div className="fbar-right">
          <span className="fbar-logo">
            <SedaMark size={30} />
            <span>seda</span>
          </span>
          <button
            type="button"
            className="fbar-up"
            aria-label="Back to top"
            onClick={() => window.scrollTo({ top: 0, behavior: 'smooth' })}
          >
            <ArrowUp />
          </button>
        </div>
      </div>
    </footer>
  )
}

export default function App() {
  return (
    <div className="page">
      <Hero />
      <Stats />
      <Features />
      <Pillars />
      <Ecosystems />
      <Audiences />
      <Footer />
    </div>
  )
}