'use client'

import React, { useState, useEffect, useRef } from 'react'
import { Users, RotateCw, Trophy, Trash2, RefreshCw, Database } from 'lucide-react'

interface Order {
  orderId: string
  customerName: string
  email: string
  amount: number
  status: string
}

interface WinnerResult {
  order: Order
  timestamp: Date
  position: number
}

const RandomDrawApp: React.FC = () => {
  const [orders, setOrders] = useState<Order[]>([])
  const [isSpinning, setIsSpinning] = useState<boolean>(false)
  const [winners, setWinners] = useState<WinnerResult[]>([])
  const [numberOfWinners, setNumberOfWinners] = useState<number>(1)
  const [currentWheelItems, setCurrentWheelItems] = useState<Order[]>([])
  const [selectedWinner, setSelectedWinner] = useState<Order | null>(null)
  const wheelRef = useRef<HTMLDivElement>(null)
  const audioContextRef = useRef<AudioContext | null>(null)
  const tickIntervalRef = useRef<NodeJS.Timeout | null>(null)

  // Initialize Audio Context
  useEffect(() => {
    const initAudio = () => {
      if (!audioContextRef.current) {
        audioContextRef.current = new (window.AudioContext || (window as any).webkitAudioContext)()
      }
    }

    document.addEventListener('click', initAudio, { once: true })

    return () => {
      document.removeEventListener('click', initAudio)
      if (tickIntervalRef.current) {
        clearTimeout(tickIntervalRef.current)
      }
    }
  }, [])

  // Create tick sound effect
  const playTickSound = () => {
    if (!audioContextRef.current) return

    const ctx = audioContextRef.current
    const oscillator = ctx.createOscillator()
    const gainNode = ctx.createGain()

    oscillator.connect(gainNode)
    gainNode.connect(ctx.destination)

    oscillator.frequency.setValueAtTime(800, ctx.currentTime)
    oscillator.frequency.exponentialRampToValueAtTime(200, ctx.currentTime + 0.05)

    gainNode.gain.setValueAtTime(0, ctx.currentTime)
    gainNode.gain.linearRampToValueAtTime(0.1, ctx.currentTime + 0.01)
    gainNode.gain.exponentialRampToValueAtTime(0.001, ctx.currentTime + 0.05)

    oscillator.start(ctx.currentTime)
    oscillator.stop(ctx.currentTime + 0.05)
  }

  // Start tick sound during spinning
  const startTickSound = (duration: number) => {
    if (tickIntervalRef.current) {
      clearTimeout(tickIntervalRef.current)
    }

    let tickInterval = 50
    const maxInterval = 200
    const intervalIncrement = (maxInterval - tickInterval) / (duration / 100)

    const tick = () => {
      playTickSound()
      tickInterval += intervalIncrement

      if (tickInterval < maxInterval) {
        tickIntervalRef.current = setTimeout(tick, Math.min(tickInterval, maxInterval))
      }
    }

    tick()

    setTimeout(() => {
      if (tickIntervalRef.current) {
        clearTimeout(tickIntervalRef.current)
        tickIntervalRef.current = null
      }
    }, duration + 100)
  }

  // Mock data
  useEffect(() => {
    const mockOrders: Order[] = [
      { orderId: 'ORD-001', customerName: 'John Doe', email: 'john@email.com', amount: 150000, status: 'completed' },
      { orderId: 'ORD-002', customerName: 'Jane Smith', email: 'jane@email.com', amount: 250000, status: 'completed' },
      { orderId: 'ORD-003', customerName: 'Bob Johnson', email: 'bob@email.com', amount: 180000, status: 'completed' },
      {
        orderId: 'ORD-004',
        customerName: 'Alice Brown',
        email: 'alice@email.com',
        amount: 320000,
        status: 'completed'
      },
      {
        orderId: 'ORD-005',
        customerName: 'Charlie Wilson',
        email: 'charlie@email.com',
        amount: 95000,
        status: 'completed'
      },
      {
        orderId: 'ORD-006',
        customerName: 'Diana Davis',
        email: 'diana@email.com',
        amount: 420000,
        status: 'completed'
      },
      {
        orderId: 'ORD-007',
        customerName: 'Edward Miller',
        email: 'edward@email.com',
        amount: 280000,
        status: 'completed'
      },
      {
        orderId: 'ORD-008',
        customerName: 'Fiona Garcia',
        email: 'fiona@email.com',
        amount: 190000,
        status: 'completed'
      },
      {
        orderId: 'ORD-009',
        customerName: 'George Martinez',
        email: 'george@email.com',
        amount: 350000,
        status: 'completed'
      },
      { orderId: 'ORD-010', customerName: 'Helen Lopez', email: 'helen@email.com', amount: 210000, status: 'completed' }
    ]
    setOrders(mockOrders)
    setCurrentWheelItems(mockOrders)
  }, [])

  const shuffleArray = <T,>(array: T[]): T[] => {
    const shuffled = [...array]
    for (let i = shuffled.length - 1; i > 0; i--) {
      const j = Math.floor(Math.random() * (i + 1))
      ;[shuffled[i], shuffled[j]] = [shuffled[j], shuffled[i]]
    }
    return shuffled
  }

  const performSpin = (finalWinners: Order[], mainWinner: Order) => {
    const wheelElement = wheelRef.current
    if (!wheelElement) return

    const CARD_HEIGHT = 100
    const WINNER_ZONE_CENTER = 250

    // Find where the winner already exists in current wheel items (no manipulation)
    let winnerIndex = currentWheelItems.findIndex(item => item.orderId === mainWinner.orderId)

    // If winner not found in wheel, find a suitable position
    if (winnerIndex === -1) {
      winnerIndex = Math.floor(Math.random() * currentWheelItems.length)
    }

    // Reset wheel position
    wheelElement.style.transition = 'none'
    wheelElement.style.transform = 'translateY(0px)'
    wheelElement.offsetHeight

    setTimeout(() => {
      // Calculate spin parameters
      const minSpins = 15
      const maxSpins = 25
      const spins = minSpins + Math.random() * (maxSpins - minSpins)
      const totalItems = currentWheelItems.length

      // Calculate final position to land on winner
      const totalRotations = Math.floor(spins)
      const baseScrollDistance = totalRotations * totalItems * CARD_HEIGHT
      const winnerScrollPosition = winnerIndex * CARD_HEIGHT
      const finalPosition = -(baseScrollDistance + winnerScrollPosition) + WINNER_ZONE_CENTER - CARD_HEIGHT / 2

      // Dynamic duration
      const distance = Math.abs(finalPosition)
      const baseDuration = 3000
      const maxDuration = 5000
      const duration = Math.min(baseDuration + (distance / 10000) * 1000, maxDuration)

      console.log('🎲 NATURAL SPIN:')
      console.log('Selected Winner:', mainWinner.orderId, '-', mainWinner.customerName)
      console.log('Found at Index:', winnerIndex)
      console.log('Will show in result:', mainWinner.orderId)

      // Animate wheel
      wheelElement.style.transform = `translateY(${finalPosition}px)`
      wheelElement.style.transition = `transform ${duration}ms cubic-bezier(0.17, 0.67, 0.12, 0.99)`

      // Start sound effect
      startTickSound(duration)

      // Complete spinning after animation
      setTimeout(() => {
        // Stop sound
        if (tickIntervalRef.current) {
          clearTimeout(tickIntervalRef.current)
          tickIntervalRef.current = null
        }

        // Set the ACTUAL pre-selected winner (not what's visually in wheel)
        setSelectedWinner(mainWinner)

        // Add PRE-SELECTED winners to results (guaranteed match)
        const newWinners = finalWinners.map((order, index) => ({
          order,
          timestamp: new Date(),
          position: winners.length + index + 1
        }))

        setWinners(prev => [...prev, ...newWinners])
        setIsSpinning(false)

        console.log('🏆 RESULT WINNER:', newWinners[0].order.orderId)
        console.log('🎯 Visual winner may differ from result (result is guaranteed correct)')

        // Reset wheel for next spin
        setTimeout(() => {
          wheelElement.style.transition = 'none'
          wheelElement.style.transform = 'translateY(0px)'
          wheelElement.offsetHeight
        }, 1500)
      }, duration)
    }, 100)
  }

  const spinWheel = async () => {
    // Filter orders yang belum menang
    const availableOrders = orders.filter(order => !winners.some(winner => winner.order.orderId === order.orderId))

    if (availableOrders.length === 0 || isSpinning) return

    setIsSpinning(true)
    setSelectedWinner(null)

    // Reset wheel position before every spin
    const wheelElement = wheelRef.current
    if (wheelElement) {
      wheelElement.style.transition = 'none'
      wheelElement.style.transform = 'translateY(0px)'
      wheelElement.offsetHeight // Force reflow
    }

    // Pilih winner yang akan ditampilkan di result
    const shuffledAvailable = shuffleArray(availableOrders)
    const finalWinners = shuffledAvailable.slice(0, Math.min(numberOfWinners, availableOrders.length))
    const mainWinner = finalWinners[0]

    console.log('🎯 PRE-SELECTED WINNER:', mainWinner.orderId, '-', mainWinner.customerName)
    console.log('🎯 THIS WINNER WILL BE GUARANTEED IN RESULT')

    // Always call performSpin with the guaranteed winner
    if (wheelElement) {
      performSpin(finalWinners, mainWinner)
    }
  }

  const clearResults = () => {
    // Stop any ongoing sound effects
    if (tickIntervalRef.current) {
      clearTimeout(tickIntervalRef.current)
      tickIntervalRef.current = null
    }

    setWinners([])
    setSelectedWinner(null)
    setIsSpinning(false) // Force reset spinning state

    // Reset wheel position when clearing
    const wheelElement = wheelRef.current
    if (wheelElement) {
      wheelElement.style.transition = 'none'
      wheelElement.style.transform = 'translateY(0px)'
    }
  }

  const refreshOrders = () => {
    // Stop any ongoing sound effects
    if (tickIntervalRef.current) {
      clearTimeout(tickIntervalRef.current)
      tickIntervalRef.current = null
    }

    const shuffled = shuffleArray(orders)
    setCurrentWheelItems(shuffled)
    setSelectedWinner(null)
    setIsSpinning(false) // Force reset spinning state

    // Reset wheel position
    const wheelElement = wheelRef.current
    if (wheelElement) {
      wheelElement.style.transition = 'none'
      wheelElement.style.transform = 'translateY(0px)'
    }
  }

  const formatCurrency = (amount: number) => {
    return new Intl.NumberFormat('id-ID', {
      style: 'currency',
      currency: 'IDR',
      minimumFractionDigits: 0
    }).format(amount)
  }

  // Get available orders for spinning
  const availableOrdersCount = orders.filter(
    order => !winners.some(winner => winner.order.orderId === order.orderId)
  ).length

  return (
    <div className='min-h-screen bg-white text-gray-900 p-6'>
      <div className='max-w-7xl mx-auto'>
        {/* Header */}
        <div className='text-center mb-8'>
          <h1 className='text-4xl font-bold text-primary mb-2'>Random Order Draw</h1>
          <p className='text-gray-600'>Select random winners from order database</p>
        </div>

        {/* Main Layout */}
        <div className='grid grid-cols-1 lg:grid-cols-2 gap-8 mb-8'>
          {/* Left Panel - Table & Controls */}
          <div className='space-y-6'>
            {/* Controls */}
            <div className='bg-white rounded-lg p-6 border border-gray-200 shadow-sm'>
              <div className='flex items-center justify-between mb-4'>
                <h2 className='text-xl font-semibold flex items-center gap-2 text-gray-900'>
                  <Database size={20} className='text-primary' />
                  Order Database ({orders.length} total, {availableOrdersCount} available)
                </h2>
                <button
                  onClick={refreshOrders}
                  className='p-2 bg-gray-100 hover:bg-gray-200 rounded-lg transition-colors border border-gray-300'
                  title='Shuffle Orders'
                  disabled={isSpinning}
                >
                  <RefreshCw size={16} className='text-gray-700' />
                </button>
              </div>

              <div className='mb-4'>
                <label className='block text-sm font-medium text-gray-700 mb-2'>Number of winners</label>
                <input
                  type='number'
                  min='1'
                  max={availableOrdersCount}
                  value={numberOfWinners}
                  onChange={e => setNumberOfWinners(Math.min(parseInt(e.target.value) || 1, availableOrdersCount))}
                  className='w-32 bg-white border border-gray-300 rounded-lg p-2 text-gray-900 focus:border-primary focus:outline-none focus:ring-2 focus:ring-primary/20'
                  disabled={isSpinning}
                />
              </div>

              <button
                onClick={spinWheel}
                disabled={availableOrdersCount === 0 || isSpinning}
                className='w-full bg-primary hover:bg-primary/90 disabled:bg-gray-400 disabled:cursor-not-allowed text-white font-semibold py-4 px-6 rounded-lg flex items-center justify-center gap-3 transition-colors text-lg shadow-lg'
              >
                <RotateCw size={24} className={isSpinning ? 'animate-spin' : ''} />
                {isSpinning ? `Spinning...` : availableOrdersCount === 0 ? 'No Available Orders' : 'Spin the Wheel'}
              </button>
            </div>

            {/* Orders Table */}
            <div className='bg-white rounded-lg overflow-hidden border border-gray-200 shadow-sm'>
              <div className='p-4 border-b border-gray-200 bg-gray-50'>
                <h3 className='text-lg font-semibold text-gray-900'>Eligible Orders</h3>
              </div>
              <div className='max-h-96 overflow-y-auto'>
                <table className='w-full'>
                  <thead className='bg-gray-100 sticky top-0'>
                    <tr>
                      <th className='text-left p-3 text-sm font-medium text-gray-700'>Order ID</th>
                      <th className='text-left p-3 text-sm font-medium text-gray-700'>Customer</th>
                      <th className='text-left p-3 text-sm font-medium text-gray-700'>Amount</th>
                      <th className='text-left p-3 text-sm font-medium text-gray-700'>Status</th>
                    </tr>
                  </thead>
                  <tbody>
                    {orders.map(order => {
                      const isWinner = winners.some(winner => winner.order.orderId === order.orderId)
                      return (
                        <tr
                          key={order.orderId}
                          className={`border-b border-gray-100 hover:bg-gray-50 transition-colors ${
                            isWinner ? 'bg-primary/10' : ''
                          }`}
                        >
                          <td className='p-3 text-sm font-mono text-gray-900'>{order.orderId}</td>
                          <td className='p-3 text-sm'>
                            <div className='text-gray-900'>{order.customerName}</div>
                            <div className='text-gray-500 text-xs'>{order.email}</div>
                          </td>
                          <td className='p-3 text-sm text-gray-900'>{formatCurrency(order.amount)}</td>
                          <td className='p-3 text-sm'>
                            <span
                              className={`px-2 py-1 rounded-full text-xs text-white ${
                                order.status === 'completed' ? 'bg-primary' : 'bg-yellow-500'
                              }`}
                            >
                              {order.status}
                            </span>
                            {isWinner && <Trophy className='inline ml-2 text-yellow-500' size={16} />}
                          </td>
                        </tr>
                      )
                    })}
                  </tbody>
                </table>
              </div>
            </div>
          </div>

          {/* Right Panel - Spin Wheel */}
          <div className='bg-white rounded-lg p-6 border border-gray-200 shadow-sm'>
            <h3 className='text-xl font-semibold mb-4 text-center text-gray-900'>Spin Wheel</h3>

            {/* Wheel Container */}
            <div
              className='relative w-full bg-gray-100 rounded-lg overflow-hidden border-2 border-primary'
              style={{ height: '500px' }}
            >
              {/* Winner Selection Zone */}
              <div
                className='absolute left-0 right-0 z-50 border-2 border-red-500 bg-red-500/15'
                style={{
                  top: '200px',
                  height: '100px',
                  display: 'flex',
                  alignItems: 'center',
                  justifyContent: 'center'
                }}
              >
                {/* Left Arrow */}
                <div
                  className='absolute w-0 h-0 border-t-transparent border-b-transparent border-r-red-500'
                  style={{
                    left: '-20px',
                    borderTopWidth: '20px',
                    borderBottomWidth: '20px',
                    borderRightWidth: '25px'
                  }}
                ></div>

                {/* Winner Badge */}
                <div className='bg-red-600 text-white px-6 py-3 rounded-lg font-bold text-lg tracking-wider shadow-lg'>
                  🎯 WINNER 🎯
                </div>

                {/* Right Arrow */}
                <div
                  className='absolute w-0 h-0 border-t-transparent border-b-transparent border-l-red-500'
                  style={{
                    right: '-20px',
                    borderTopWidth: '20px',
                    borderBottomWidth: '20px',
                    borderLeftWidth: '25px'
                  }}
                ></div>
              </div>

              {/* Scrolling Cards */}
              <div ref={wheelRef} className='absolute inset-0' style={{ transform: 'translateY(0px)' }}>
                {/* Generate enough cards for smooth scrolling */}
                {Array.from({ length: 40 }, (_, repeatIndex) =>
                  currentWheelItems.map((order, orderIndex) => {
                    const isCurrentWinner = winners.some(winner => winner.order.orderId === order.orderId)
                    const isSelectedWinner = selectedWinner?.orderId === order.orderId

                    return (
                      <div
                        key={`repeat-${repeatIndex}-order-${orderIndex}`}
                        className={`flex items-center px-4 border-b border-gray-300 ${
                          isCurrentWinner
                            ? 'bg-primary/10'
                            : isSelectedWinner
                              ? 'bg-yellow-100'
                              : orderIndex % 2 === 0
                                ? 'bg-white'
                                : 'bg-gray-50'
                        }`}
                        style={{
                          height: '100px',
                          minHeight: '100px',
                          maxHeight: '100px'
                        }}
                      >
                        {/* Order Info */}
                        <div className='flex-1'>
                          <div
                            className={`font-bold text-xl mb-1 ${
                              isCurrentWinner ? 'text-primary' : isSelectedWinner ? 'text-yellow-600' : 'text-gray-900'
                            }`}
                          >
                            {order.orderId}
                          </div>
                          <div
                            className={`text-base ${
                              isCurrentWinner
                                ? 'text-primary/80'
                                : isSelectedWinner
                                  ? 'text-yellow-700'
                                  : 'text-gray-600'
                            }`}
                          >
                            {order.customerName}
                          </div>
                        </div>

                        {/* Amount */}
                        <div className='text-right'>
                          <div className='text-primary font-bold text-lg'>{formatCurrency(order.amount)}</div>
                          {(isCurrentWinner || isSelectedWinner) && (
                            <Trophy className='inline ml-2 text-yellow-500' size={16} />
                          )}
                        </div>
                      </div>
                    )
                  })
                )}
              </div>

              {/* Gradient Overlays */}
              <div className='absolute top-0 left-0 right-0 h-48 bg-gradient-to-b from-gray-100 via-gray-100/70 to-transparent pointer-events-none z-40'></div>
              <div className='absolute bottom-0 left-0 right-0 h-48 bg-gradient-to-t from-gray-100 via-gray-100/70 to-transparent pointer-events-none z-40'></div>
            </div>
          </div>
        </div>

        {/* Results Section */}
        {winners.length > 0 && (
          <div className='bg-white rounded-lg p-6 border border-gray-200 shadow-sm'>
            <div className='flex items-center justify-between mb-6'>
              <h3 className='text-2xl font-semibold flex items-center gap-2 text-gray-900'>
                <Trophy className='text-yellow-500' size={28} />
                Draw Results ({winners.length} Winners)
              </h3>
              <button
                onClick={clearResults}
                className='bg-red-600 hover:bg-red-700 text-white px-4 py-2 rounded-lg flex items-center gap-2 transition-colors'
                disabled={isSpinning}
              >
                <Trash2 size={16} />
                Clear Results
              </button>
            </div>

            {/* Simple Winner List */}
            <div className='space-y-3'>
              {winners.map(winner => (
                <div
                  key={`result-${winner.order.orderId}-${winner.timestamp.getTime()}`}
                  className='flex items-center justify-between bg-gray-50 p-4 rounded-lg border border-gray-200'
                >
                  <div className='flex items-center gap-4'>
                    <div className='bg-yellow-500 text-white px-3 py-1 rounded-full text-sm font-bold'>
                      #{winner.position}
                    </div>
                    <div>
                      <div className='font-bold text-lg text-gray-900'>{winner.order.customerName}</div>
                      <div className='text-gray-600 text-sm'>
                        {winner.order.orderId} • {winner.order.email}
                      </div>
                    </div>
                  </div>

                  <div className='text-right'>
                    <div className='text-primary font-bold text-lg'>{formatCurrency(winner.order.amount)}</div>
                    <div className='text-gray-500 text-xs'>Won at: {winner.timestamp.toLocaleTimeString()}</div>
                  </div>
                </div>
              ))}
            </div>
          </div>
        )}
      </div>
    </div>
  )
}

export default RandomDrawApp