import { useEffect, useState } from 'react'
import { useParams } from 'react-router-dom'
import { Check, Clock, X, ChefHat, Truck, Package, Leaf } from 'lucide-react'
import { fetchOrderStatus } from '../api'

const STATUS_CONFIG = {
  pending_acceptance: { label: 'Waiting for confirmation', Icon: Clock,     color: '#c9a24b',  bg: '#f6edd6' },
  accepted:           { label: 'Order accepted!',           Icon: Check,     color: '#3f7d4e',  bg: '#e7f1e7' },
  rejected:           { label: 'Order declined',            Icon: X,         color: '#c2602f',  bg: '#f7e6dc' },
  preparing:          { label: 'Being prepared',            Icon: ChefHat,   color: '#2d3b2d',  bg: '#e7ede7' },
  ready:              { label: 'Ready for pickup!',         Icon: Package,   color: '#3f7d4e',  bg: '#e7f1e7' },
  out_for_delivery:   { label: 'Out for delivery',          Icon: Truck,     color: '#2d3b2d',  bg: '#e7ede7' },
  delivered:          { label: 'Delivered!',                Icon: Check,     color: '#3f7d4e',  bg: '#e7f1e7' },
}

const TERMINAL = new Set(['rejected', 'delivered'])
const POLL_MS = 10_000

export default function OrderConfirm() {
  const { ref } = useParams()
  const [orderStatus, setOrderStatus] = useState(null)
  const [rejectionReason, setRejectionReason] = useState(null)
  const [error, setError] = useState(false)

  useEffect(() => {
    let timer

    async function poll() {
      try {
        const data = await fetchOrderStatus(ref)
        setOrderStatus(data.status)
        setRejectionReason(data.rejection_reason)
        if (!TERMINAL.has(data.status)) {
          timer = setTimeout(poll, POLL_MS)
        }
      } catch {
        setError(true)
      }
    }

    poll()
    return () => clearTimeout(timer)
  }, [ref])

  const cfg = STATUS_CONFIG[orderStatus] ?? STATUS_CONFIG.pending_acceptance
  const { label, Icon, color, bg } = cfg

  return (
    <div className="relative mx-auto min-h-dvh max-w-[480px] bg-[#faf7f0] shadow-[0_0_60px_-20px_rgba(45,42,31,0.3)] flex flex-col items-center justify-center px-6 py-12">

      {/* Ornament top */}
      <div className="mb-8 flex w-32 items-center gap-2">
        <span className="h-px flex-1 bg-gradient-to-r from-transparent to-[#d8cfb6]" />
        <Leaf className="h-3.5 w-3.5 text-[#c9a24b]" strokeWidth={1.6} />
        <span className="h-px flex-1 bg-gradient-to-l from-transparent to-[#d8cfb6]" />
      </div>

      {/* Status icon */}
      <div
        className="flex h-20 w-20 items-center justify-center rounded-full"
        style={{ background: bg }}
      >
        <Icon size={38} style={{ color }} strokeWidth={2.2} />
      </div>

      {/* Ref number */}
      <p className="mt-5 font-sans text-[11px] font-semibold uppercase tracking-[0.22em] text-[#b3aa90]">
        {ref}
      </p>

      {/* Status label */}
      <h1 className="mt-2 font-display text-[28px] font-semibold leading-tight text-center text-[#2d3b2d]">
        {error ? 'Could not load status' : label}
      </h1>

      {/* Rejection reason */}
      {rejectionReason && (
        <p className="mt-2 text-[14px] text-center text-[#7d7660]">
          Reason: {rejectionReason}
        </p>
      )}

      {/* Subtext */}
      {orderStatus === 'delivered' && (
        <p className="mt-3 max-w-[280px] text-center text-[14px] leading-relaxed text-[#7d7660]">
          Thank you for your order! Enjoy your meal.
        </p>
      )}
      {orderStatus === 'rejected' && (
        <p className="mt-3 max-w-[280px] text-center text-[14px] leading-relaxed text-[#7d7660]">
          We're sorry we couldn't take your order this time. Please try again or speak to staff.
        </p>
      )}
      {!TERMINAL.has(orderStatus) && !error && (
        <p className="mt-3 text-[13px] text-[#9a917a]">
          We'll update this page automatically. Keep it open.
        </p>
      )}

      {/* Spinner */}
      {!TERMINAL.has(orderStatus) && !error && (
        <div className="mt-6 flex justify-center">
          <div className="h-5 w-5 rounded-full border-2 border-[#2d3b2d] border-t-transparent animate-spin" />
        </div>
      )}

      {/* Ornament bottom */}
      <div className="mt-10 flex w-32 items-center gap-2">
        <span className="h-px flex-1 bg-gradient-to-r from-transparent to-[#d8cfb6]" />
        <Leaf className="h-3 w-3 text-[#c9a24b]" strokeWidth={1.6} />
        <span className="h-px flex-1 bg-gradient-to-l from-transparent to-[#d8cfb6]" />
      </div>
    </div>
  )
}