'use client'

import React, { useEffect, useRef, useState } from 'react'
import { cn } from '@/utilities/ui'
import { Button, buttonVariants } from '@/components/ui/button'
import { ArrowRightIcon, PhoneCallIcon } from 'lucide-react'
import { createPortal } from 'react-dom'
import { MenuToggleIcon } from '@/components/ui/menu-toggle-icon'
import { useScroll } from '@/components/ui/use-scroll'

import { useThemeMode } from '@/hooks/useThemeMode'

// ─── Types ────────────────────────────────────────────────────────────────────

interface Star {
  x: number; y: number; r: number
  v: number; baseAlpha: number
  phase: number; twinkleSpeed: number
  vx: number; vy: number
}

interface Wave {
  amp: number; freq: number; speed: number
  phase: number; yBase: number; width: number; v: number
}

// ─── Constants ───────────────────────────────────────────────────────────────

const STAR_TONES = [255, 210, 160, 110, 65]
const WAVE_TONES = [55, 90, 125, 165, 205]
const WAVE_CONFIGS = [
  { amp: 26, freq: 0.011, speed: 0.35, phase: 0.0, yBase: 0.38, width: 1.6, toneIdx: 0 },
  { amp: 20, freq: 0.015, speed: 0.50, phase: 1.3, yBase: 0.52, width: 1.8, toneIdx: 1 },
  { amp: 30, freq: 0.008, speed: 0.28, phase: 2.6, yBase: 0.63, width: 2.2, toneIdx: 2 },
  { amp: 16, freq: 0.019, speed: 0.65, phase: 0.8, yBase: 0.74, width: 2.0, toneIdx: 3 },
  { amp: 22, freq: 0.013, speed: 0.42, phase: 3.2, yBase: 0.85, width: 2.6, toneIdx: 4 },
]

// ─── Canvas helpers ───────────────────────────────────────────────────────────

function makeStars(W: number, H: number): Star[] {
  return Array.from({ length: 180 }, () => {
    const i = Math.floor(Math.random() * STAR_TONES.length)
    return {
      x: Math.random() * W, y: Math.random() * H,
      r: 0.4 + Math.random() * 1.6,
      v: STAR_TONES[i], baseAlpha: 0.5 + i * 0.1,
      phase: Math.random() * Math.PI * 2,
      twinkleSpeed: 0.8 + Math.random() * 2.0,
      vx: (Math.random() - 0.5) * 0.3,
      vy: (Math.random() - 0.5) * 0.15,
    }
  })
}

function makeWaves(): Wave[] {
  return WAVE_CONFIGS.map(c => ({ ...c, v: WAVE_TONES[c.toneIdx] }))
}

function drawStars(ctx: CanvasRenderingContext2D, stars: Star[], W: number, H: number, ga: number) {
  const now = Date.now() / 1000
  for (const s of stars) {
    s.x += s.vx; s.y += s.vy
    if (s.x < 0) s.x = W; if (s.x > W) s.x = 0
    if (s.y < 0) s.y = H; if (s.y > H) s.y = 0
    const tw = 0.35 + 0.65 * ((Math.sin(now * s.twinkleSpeed + s.phase) + 1) / 2)
    ctx.beginPath()
    ctx.arc(s.x, s.y, s.r, 0, Math.PI * 2)
    ctx.fillStyle = `rgba(${s.v},${s.v},${s.v},${s.baseAlpha * tw * ga})`
    ctx.fill()
  }
}

function wavePts(w: Wave, W: number, H: number, now: number) {
  const pts: { x: number; y: number }[] = []
  for (let x = 0; x <= W; x += 8)
    pts.push({ x, y: H * w.yBase + Math.sin(x * w.freq + w.phase + now * w.speed) * w.amp })
  return pts
}

function wavePath(ctx: CanvasRenderingContext2D, pts: { x: number; y: number }[]) {
  ctx.beginPath()
  ctx.moveTo(pts[0].x, pts[0].y)
  for (let i = 0; i < pts.length - 1; i++) {
    const mx = (pts[i].x + pts[i + 1].x) / 2
    const my = (pts[i].y + pts[i + 1].y) / 2
    ctx.quadraticCurveTo(pts[i].x, pts[i].y, mx, my)
  }
  ctx.lineTo(pts[pts.length - 1].x, pts[pts.length - 1].y)
}

function drawWaves(ctx: CanvasRenderingContext2D, waves: Wave[], W: number, H: number, ga: number, bgR: number) {
  const now = Date.now() / 1000
  const bg = Math.round(bgR)
  for (const w of waves) {
    const v = w.v
    const yBase = H * w.yBase
    const pts = wavePts(w, W, H, now)
    const grad = ctx.createLinearGradient(0, yBase - w.amp, 0, yBase + w.amp * 3)
    grad.addColorStop(0,   `rgba(${v},${v},${v},${0.030 * ga})`)
    grad.addColorStop(0.4, `rgba(${v},${v},${v},${0.012 * ga})`)
    grad.addColorStop(1,   `rgba(${bg},${bg},${bg},0)`)
    wavePath(ctx, pts)
    ctx.lineTo(W, H); ctx.lineTo(0, H); ctx.closePath()
    ctx.fillStyle = grad
    ctx.fill()
    wavePath(ctx, pts)
    ctx.strokeStyle = `rgba(${v},${v},${v},${0.85 * ga})`
    ctx.lineWidth = w.width
    ctx.lineJoin = 'round'
    ctx.lineCap = 'round'
    ctx.stroke()
  }
}

// ─── Background canvas ────────────────────────────────────────────────────────

function Background({ isDark }: { isDark: boolean }) {
  const canvasRef = useRef<HTMLCanvasElement>(null)
  const darkRef = useRef(isDark)
  useEffect(() => { darkRef.current = isDark }, [isDark])

  useEffect(() => {
    const canvas = canvasRef.current
    if (!canvas) return
    const ctx = canvas.getContext('2d')
    if (!ctx) return
    let W = 0, H = 0
    let stars: Star[] = [], waves: Wave[] = []
    let bgR = 0, bgG = 0, bgB = 0, crossfade = 0
    let rafId: number

    function resize() {
      W = canvas!.width = canvas!.offsetWidth
      H = canvas!.height = canvas!.offsetHeight
      stars = makeStars(W, H)
      waves = makeWaves()
    }

    function loop() {
      const dark = darkRef.current
      const tBg = dark ? 0 : 255
      const tCross = dark ? 0 : 1
      bgR += (tBg - bgR) * 0.04
      bgG += (tBg - bgG) * 0.04
      bgB += (tBg - bgB) * 0.04
      crossfade += (tCross - crossfade) * 0.03
      ctx!.fillStyle = `rgb(${Math.round(bgR)},${Math.round(bgG)},${Math.round(bgB)})`
      ctx!.fillRect(0, 0, W, H)
      const sa = 1 - crossfade, wa = crossfade
      if (sa > 0.01) drawStars(ctx!, stars, W, H, sa)
      if (wa > 0.01) drawWaves(ctx!, waves, W, H, wa, bgR)
      rafId = requestAnimationFrame(loop)
    }

    const ro = new ResizeObserver(resize)
    ro.observe(canvas)
    resize()
    rafId = requestAnimationFrame(loop)
    return () => { cancelAnimationFrame(rafId); ro.disconnect() }
  }, [])

  return <canvas ref={canvasRef} style={{ display: 'block', width: '100%', height: '100%' }} />
}

// ─── Header ───────────────────────────────────────────────────────────────────

function Header({ isDark, onToggle }: { isDark: boolean; onToggle: () => void }) {
  const [open, setOpen] = useState(false)
  const scrolled = useScroll(10)

  const links = [
    { label: 'Work',    href: '#work' },
    { label: 'About',   href: '#about' },
    { label: 'Contact', href: '#contact' },
  ]

  useEffect(() => {
    document.body.style.overflow = open ? 'hidden' : ''
    return () => { document.body.style.overflow = '' }
  }, [open])

  const textColor = isDark ? 'text-white/80 hover:text-white' : 'text-black/70 hover:text-black'
  const borderColor = isDark ? 'border-white/10' : 'border-black/10'

  return (
    <header className={cn(
      'sticky top-0 z-50 w-full border-b border-transparent transition-all duration-300',
      scrolled && (isDark
        ? 'bg-black/60 border-white/10 backdrop-blur-lg'
        : 'bg-white/60 border-black/10 backdrop-blur-lg')
    )}>
      <nav className="mx-auto flex h-14 w-full max-w-5xl items-center justify-between px-6">
        {/* Wordmark */}
        <span className={cn('font-semibold tracking-tight text-sm transition-colors', isDark ? 'text-white' : 'text-black')}>
          mackie.
        </span>

        {/* Desktop links */}
        <div className="hidden items-center gap-1 md:flex">
          {links.map(l => (
            <a key={l.label}
              href={l.href}
              className={cn('px-3 py-1.5 rounded-md text-sm transition-colors', textColor)}
            >{l.label}</a>
          ))}

          {/* Light / dark toggle */}
          <button
            onClick={onToggle}
            className={cn(
              'ml-2 flex items-center gap-2 rounded-full border px-3 py-1.5 text-xs transition-all',
              isDark
                ? 'border-white/20 text-white/70 hover:text-white hover:border-white/40'
                : 'border-black/15 text-black/60 hover:text-black hover:border-black/30'
            )}
          >
            {isDark ? '☀ Light' : '☾ Dark'}
          </button>

          <a href="#contact" className={cn(
            'ml-1 rounded-full border px-4 py-1.5 text-xs font-medium transition-all',
            isDark
              ? 'border-white/25 text-white hover:bg-white hover:text-black'
              : 'border-black/20 text-black hover:bg-black hover:text-white'
          )}>
            Hire me
          </a>
        </div>

        {/* Mobile toggle */}
        <Button size="icon" variant="outline"
          onClick={() => setOpen(!open)}
          className={cn('md:hidden', isDark ? 'border-white/20 text-white bg-transparent' : '')}
          aria-expanded={open}
        >
          <MenuToggleIcon open={open} className="size-5" duration={300} />
        </Button>
      </nav>

      {/* Mobile menu */}
      {open && typeof window !== 'undefined' && createPortal(
        <div className={cn(
          'fixed top-14 inset-x-0 bottom-0 z-40 flex flex-col p-6 gap-4 backdrop-blur-lg md:hidden',
          isDark ? 'bg-black/90' : 'bg-white/90'
        )}>
          <div className="grid gap-2">
            {links.map(l => (
              <a key={l.label} href={l.href}
                onClick={() => setOpen(false)}
                className={cn('px-3 py-2 rounded-md text-sm font-medium', textColor)}
              >{l.label}</a>
            ))}
          </div>
          <div className="mt-auto flex flex-col gap-2">
            <button onClick={() => { onToggle(); setOpen(false) }}
              className={cn('w-full rounded-full border py-2 text-sm', isDark ? 'border-white/20 text-white' : 'border-black/20 text-black')}
            >{isDark ? '☀ Light mode' : '☾ Dark mode'}</button>
            <a href="#contact"
              className={cn('w-full rounded-full py-2 text-sm font-medium text-center', isDark ? 'bg-white text-black' : 'bg-black text-white')}
            >Hire me</a>
          </div>
        </div>,
        document.body
      )}
    </header>
  )
}

// ─── Hero section ─────────────────────────────────────────────────────────────

function HeroSection({ isDark }: { isDark: boolean }) {
  const text  = isDark ? 'text-white'          : 'text-black'
  const muted = isDark ? 'text-white/55'       : 'text-black/55'
  const badge = isDark ? 'bg-white/8 border-white/15 text-white/70' : 'bg-black/5 border-black/12 text-black/60'
  const borderLine = isDark ? 'bg-white/10' : 'bg-black/10'
  const borderLineFaint = isDark ? 'bg-white/5' : 'bg-black/5'

  return (
    <section className="relative mx-auto w-full max-w-5xl">
      {/* Vertical border lines */}
      <div aria-hidden="true" className="absolute inset-0 mx-auto hidden min-h-screen w-full max-w-5xl lg:block pointer-events-none">
        <div className={cn('mask-y-from-80% mask-y-to-100% absolute inset-y-0 left-0 z-10 h-full w-px', borderLine)} />
        <div className={cn('mask-y-from-80% mask-y-to-100% absolute inset-y-0 right-0 z-10 h-full w-px', borderLine)} />
      </div>

      {/* Inner vertical border lines */}
      <div aria-hidden="true" className="absolute inset-0 -z-[1] size-full overflow-hidden pointer-events-none">
        <div className={cn('absolute inset-y-0 left-4 w-px bg-linear-to-b from-transparent via-border to-border md:left-8', borderLine)} />
        <div className={cn('absolute inset-y-0 right-4 w-px bg-linear-to-b from-transparent via-border to-border md:right-8', borderLine)} />
        <div className={cn('absolute inset-y-0 left-8 w-px bg-linear-to-b from-transparent via-border/50 to-border/50 md:left-12', borderLineFaint)} />
        <div className={cn('absolute inset-y-0 right-8 w-px bg-linear-to-b from-transparent via-border/50 to-border/50 md:right-12', borderLineFaint)} />
      </div>

      <div className="relative flex flex-col items-center justify-center gap-5 pt-32 pb-28 px-6 text-center">

        {/* Badge */}
        <a
          href="#work"
          className={cn(
            'group mx-auto flex w-fit items-center gap-3 rounded-full border px-3 py-1 shadow-sm',
            'fade-in slide-in-from-bottom-10 animate-in fill-mode-backwards transition-all delay-500 duration-500 ease-out',
            badge
          )}
        >
          <span className="text-xs">graphic designer turned developer</span>
          <span className={cn('block h-4 border-l', isDark ? 'border-white/20' : 'border-black/15')} />
          <ArrowRightIcon className="size-3 duration-150 ease-out group-hover:translate-x-1" />
        </a>

        {/* Headline */}
        <h1 className={cn(
          'fade-in slide-in-from-bottom-10 animate-in fill-mode-backwards delay-100 duration-500 ease-out',
          'text-balance text-4xl font-medium tracking-tight md:text-5xl lg:text-6xl',
          text
        )}>
          Hey, I'm Mackie.
        </h1>

        {/* Subline */}
        <p className={cn(
          'fade-in slide-in-from-bottom-10 animate-in fill-mode-backwards delay-200 duration-500 ease-out',
          'mx-auto max-w-lg text-base tracking-wide md:text-lg',
          muted
        )}>
          I built my way into code from scratch — no shortcuts, no excuses.
          <br className="hidden sm:block" />
          Full stack, end to end. I take ideas and ship them.
        </p>

        {/* CTAs */}
        <div className="fade-in slide-in-from-bottom-10 animate-in fill-mode-backwards delay-300 duration-500 ease-out flex flex-wrap items-center justify-center gap-3 pt-2">
          <a
            href="#contact"
            className={cn(
              'flex items-center gap-2 rounded-full px-5 py-2.5 text-sm font-medium transition-all',
              isDark
                ? 'bg-white text-black hover:bg-white/90'
                : 'bg-black text-white hover:bg-black/85'
            )}
          >
            <PhoneCallIcon className="size-3.5" />
            Book a call
          </a>
          <a
            href="#work"
            className={cn(
              'flex items-center gap-2 rounded-full border px-5 py-2.5 text-sm font-medium transition-all',
              isDark
                ? 'border-white/25 text-white hover:bg-white/8'
                : 'border-black/20 text-black hover:bg-black/5'
            )}
          >
            View my work
            <ArrowRightIcon className="size-3.5 duration-150 ease-out group-hover:translate-x-1" />
          </a>
        </div>

      </div>
    </section>
  )
}

// ─── Logo cloud (skills that i have) ─────────────────────────────────────────

const LOGOS = [
  { src: 'https://storage.efferd.com/logo/nvidia-wordmark.svg',   alt: 'Nvidia' },
  { src: 'https://storage.efferd.com/logo/supabase-wordmark.svg', alt: 'Supabase' },
  { src: 'https://storage.efferd.com/logo/openai-wordmark.svg',   alt: 'OpenAI' },
  { src: 'https://storage.efferd.com/logo/vercel-wordmark.svg',   alt: 'Vercel' },
  { src: 'https://storage.efferd.com/logo/github-wordmark.svg',   alt: 'GitHub' },
  { src: 'https://storage.efferd.com/logo/claude-wordmark.svg',   alt: 'Claude' },
]

function LogosSection({ isDark }: { isDark: boolean }) {
  const text  = isDark ? 'text-white/40'  : 'text-black/40'
  const bold  = isDark ? 'text-white/70'  : 'text-black/70'
  const border = isDark ? 'border-white/10' : 'border-black/10'
  const logoFilter = isDark ? 'brightness-0 invert opacity-30' : 'brightness-0 opacity-25'

  return (
    <section className={cn('relative border-t py-8 px-6', border)}>
      <p className={cn('mb-6 text-center text-xs tracking-widest uppercase', text)}>
        Skills that i have
      </p>
      <div className="mx-auto flex max-w-3xl flex-wrap items-center justify-center gap-8">
        {LOGOS.map(l => (
          <img key={l.alt} src={l.src} alt={l.alt} className={cn('h-5 w-auto transition-all', logoFilter)} />
        ))}
      </div>
    </section>
  )
}

// ─── Main export ──────────────────────────────────────────────────────────────

// REPLACE WITH:
export default function HeroPage() {
  const { isDark, toggle } = useThemeMode()

  return (
    <div style={{ position: 'relative', minHeight: '100vh' }}>

      {/* Canvas background — fixed behind everything */}
      <div style={{ position: 'fixed', inset: 0, zIndex: 0 }}>
        <Background isDark={isDark} />
      </div>

      {/* Page content */}
      <div style={{ position: 'relative', zIndex: 1 }}>
        <Header isDark={isDark} onToggle={toggle} />
        <main>
          <HeroSection isDark={isDark} />
          <LogosSection isDark={isDark} />
        </main>
      </div>

    </div>
  )
}
