'use client'

import React, { useState, useEffect } from 'react'

interface AIAnalytics {
  generated: string
  overview: {
    totalLearningRecords: number
    totalTrades: number
    totalSessions: number
    activeSessions: number
  }
  improvements: {
    confidenceImprovement: number
    accuracyImprovement: number | null
    trend: string
  }
  pnl: {
    totalTrades: number
    totalPnL: number
    totalPnLPercent: number
    winRate: number
    avgTradeSize: number
  }
  currentPosition: any
  realTimeMetrics: {
    daysSinceAIStarted: number
    learningRecordsPerDay: number
    tradesPerDay: number
    lastUpdate: string
    isLearningActive: boolean
  }
  learningProof: {
    hasImprovement: boolean
    improvementDirection: string
    confidenceChange: number
    sampleSize: number
    isStatisticallySignificant: boolean
  }
}

interface PositionData {
  hasPosition: boolean
  symbol?: string
  unrealizedPnl?: number
  riskLevel?: string
}

export default function Dashboard() {
  const [positions, setPositions] = useState<PositionData>({ hasPosition: false })
  const [loading, setLoading] = useState(true)
  const [aiAnalytics, setAiAnalytics] = useState<AIAnalytics | null>(null)
  const [analyticsLoading, setAnalyticsLoading] = useState(true)

  const fetchData = async () => {
    try {
      // Fetch position data
      const positionResponse = await fetch('/api/check-position')
      const positionData = await positionResponse.json()
      setPositions(positionData)

      // Fetch AI analytics
      setAnalyticsLoading(true)
      const analyticsResponse = await fetch('/api/ai-analytics')
      const analyticsData = await analyticsResponse.json()
      setAiAnalytics(analyticsData)
      setAnalyticsLoading(false)
    } catch (error) {
      console.error('Error fetching data:', error)
      setAnalyticsLoading(false)
    } finally {
      setLoading(false)
    }
  }

  useEffect(() => {
    fetchData()
    // Refresh every 30 seconds
    const interval = setInterval(fetchData, 30000)
    return () => clearInterval(interval)
  }, [])

  return (
    <div className="space-y-8">
      {/* Quick Overview Cards */}
      <div className="space-y-6">
        {/* Position Monitor */}
        <div className="bg-gray-800 rounded-lg p-4 border border-gray-700">
          <div className="flex justify-between items-center">
            <h2 className="text-lg font-semibold text-white flex items-center">
              <span className="mr-2">🔍</span>Position Monitor
            </h2>
            <span className="text-sm text-gray-400">
              Last update: {new Date().toLocaleTimeString()}
            </span>
          </div>
        </div>

        {/* Position Status */}
        <div className="bg-gray-800 border border-gray-700 rounded-lg p-6">
          {positions.hasPosition ? (
            <div className="space-y-4">
              <h3 className="text-lg font-medium text-white flex items-center">
                <span className="mr-2">📈</span>Active Position
              </h3>
              <div className="grid grid-cols-2 md:grid-cols-4 gap-4">
                <div className="text-center">
                  <p className="text-sm text-gray-400">Symbol</p>
                  <p className="text-lg font-semibold text-blue-400">{positions.symbol}</p>
                </div>
                <div className="text-center">
                  <p className="text-sm text-gray-400">Unrealized PnL</p>
                  <p className={`text-lg font-semibold ${
                    (positions.unrealizedPnl || 0) >= 0 ? 'text-green-400' : 'text-red-400'
                  }`}>
                    ${(positions.unrealizedPnl || 0).toFixed(2)}
                  </p>
                </div>
                <div className="text-center">
                  <p className="text-sm text-gray-400">Risk Level</p>
                  <p className={`text-lg font-semibold ${
                    positions.riskLevel === 'LOW' ? 'text-green-400' :
                    positions.riskLevel === 'MEDIUM' ? 'text-yellow-400' : 'text-red-400'
                  }`}>
                    {positions.riskLevel}
                  </p>
                </div>
                <div className="text-center">
                  <p className="text-sm text-gray-400">Status</p>
                  <div className="flex items-center justify-center space-x-1">
                    <div className="w-2 h-2 bg-green-400 rounded-full animate-pulse"></div>
                    <span className="text-sm text-green-400">Active</span>
                  </div>
                </div>
              </div>
            </div>
          ) : (
            <div className="text-center py-8">
              <p className="text-gray-400 text-lg flex items-center justify-center">
                <span className="mr-2">📊</span>No Open Positions
              </p>
              <p className="text-gray-500 mt-2">Scanning for opportunities...</p>
            </div>
          )}
        </div>

        {/* Automation Status */}
        <div className="bg-gray-800 border border-gray-700 rounded-lg p-6">
          <h3 className="text-lg font-medium text-white mb-4 flex items-center">
            <span className="mr-2">🤖</span>Automation Status
          </h3>
          <div className="text-center py-4">
            <p className="text-red-400 font-medium flex items-center justify-center">
              <span className="w-2 h-2 bg-red-400 rounded-full mr-2"></span>STOPPED
            </p>
            <p className="text-gray-500 mt-2"></p>
          </div>
        </div>
      </div>

      {/* AI Learning Analytics */}
      <div className="card card-gradient">
        {analyticsLoading ? (
          <div className="flex items-center justify-center py-12">
            <div className="spinner"></div>
            <span className="ml-2 text-gray-400">Loading AI learning analytics...</span>
          </div>
        ) : aiAnalytics ? (
          <div className="p-6">
            <h2 className="text-xl font-bold text-white mb-6 flex items-center">
              <span className="mr-2">🧠</span>AI Learning Analytics & Performance
            </h2>
            
            {/* Overview Stats */}
            <div className="grid grid-cols-2 md:grid-cols-4 gap-4 mb-6">
              <div className="bg-gray-800/50 rounded-lg p-4 text-center">
                <div className="text-2xl font-bold text-blue-400">{aiAnalytics.overview.totalLearningRecords}</div>
                <div className="text-sm text-gray-400">Learning Records</div>
              </div>
              <div className="bg-gray-800/50 rounded-lg p-4 text-center">
                <div className="text-2xl font-bold text-green-400">{aiAnalytics.overview.totalTrades}</div>
                <div className="text-sm text-gray-400">AI Trades Executed</div>
              </div>
              <div className="bg-gray-800/50 rounded-lg p-4 text-center">
                <div className="text-2xl font-bold text-purple-400">{aiAnalytics.realTimeMetrics.daysSinceAIStarted}</div>
                <div className="text-sm text-gray-400">Days Active</div>
              </div>
              <div className="bg-gray-800/50 rounded-lg p-4 text-center">
                <div className={`text-2xl font-bold ${aiAnalytics.learningProof.isStatisticallySignificant ? 'text-green-400' : 'text-yellow-400'}`}>
                  {aiAnalytics.learningProof.isStatisticallySignificant ? '✓' : '⚠'}
                </div>
                <div className="text-sm text-gray-400">Statistical Significance</div>
              </div>
            </div>

            {/* Learning Improvements */}
            <div className="grid grid-cols-1 md:grid-cols-2 gap-6 mb-6">
              <div className="bg-gray-800/30 rounded-lg p-4">
                <h3 className="text-lg font-semibold text-white mb-3">Learning Progress</h3>
                <div className="space-y-2">
                  <div className="flex justify-between">
                    <span className="text-gray-400">Confidence Change:</span>
                    <span className={`font-semibold ${aiAnalytics.improvements.confidenceImprovement >= 0 ? 'text-green-400' : 'text-red-400'}`}>
                      {aiAnalytics.improvements.confidenceImprovement > 0 ? '+' : ''}{aiAnalytics.improvements.confidenceImprovement.toFixed(2)}%
                    </span>
                  </div>
                  <div className="flex justify-between">
                    <span className="text-gray-400">Trend Direction:</span>
                    <span className={`font-semibold ${aiAnalytics.improvements.trend === 'IMPROVING' ? 'text-green-400' : 'text-yellow-400'}`}>
                      {aiAnalytics.improvements.trend}
                    </span>
                  </div>
                  <div className="flex justify-between">
                    <span className="text-gray-400">Sample Size:</span>
                    <span className="text-white font-semibold">{aiAnalytics.learningProof.sampleSize}</span>
                  </div>
                </div>
              </div>

              <div className="bg-gray-800/30 rounded-lg p-4">
                <h3 className="text-lg font-semibold text-white mb-3">Trading Performance</h3>
                <div className="space-y-2">
                  <div className="flex justify-between">
                    <span className="text-gray-400">Total PnL:</span>
                    <span className={`font-semibold ${aiAnalytics.pnl.totalPnL >= 0 ? 'text-green-400' : 'text-red-400'}`}>
                      ${aiAnalytics.pnl.totalPnL.toFixed(2)}
                    </span>
                  </div>
                  <div className="flex justify-between">
                    <span className="text-gray-400">PnL Percentage:</span>
                    <span className={`font-semibold ${aiAnalytics.pnl.totalPnLPercent >= 0 ? 'text-green-400' : 'text-red-400'}`}>
                      {aiAnalytics.pnl.totalPnLPercent > 0 ? '+' : ''}{aiAnalytics.pnl.totalPnLPercent.toFixed(2)}%
                    </span>
                  </div>
                  <div className="flex justify-between">
                    <span className="text-gray-400">Win Rate:</span>
                    <span className="text-white font-semibold">{(aiAnalytics.pnl.winRate * 100).toFixed(1)}%</span>
                  </div>
                  <div className="flex justify-between">
                    <span className="text-gray-400">Avg Trade Size:</span>
                    <span className="text-white font-semibold">${aiAnalytics.pnl.avgTradeSize.toFixed(2)}</span>
                  </div>
                </div>
              </div>
            </div>

            {/* Proof of Learning */}
            <div className="bg-gradient-to-r from-blue-900/30 to-purple-900/30 rounded-lg p-4 border border-blue-500/30">
              <h3 className="text-lg font-semibold text-white mb-3 flex items-center">
                <span className="mr-2">📈</span>Proof of AI Learning Effectiveness
              </h3>
              <div className="grid grid-cols-1 md:grid-cols-3 gap-4 text-sm">
                <div className="text-center">
                  <div className="text-lg font-bold text-blue-400">{aiAnalytics.overview.totalLearningRecords}</div>
                  <div className="text-gray-400">Learning Samples Collected</div>
                </div>
                <div className="text-center">
                  <div className="text-lg font-bold text-green-400">{aiAnalytics.overview.totalTrades}</div>
                  <div className="text-gray-400">AI Decisions Executed</div>
                </div>
                <div className="text-center">
                  <div className={`text-lg font-bold ${aiAnalytics.learningProof.isStatisticallySignificant ? 'text-green-400' : 'text-yellow-400'}`}>
                    {aiAnalytics.learningProof.isStatisticallySignificant ? 'PROVEN' : 'LEARNING'}
                  </div>
                  <div className="text-gray-400">Statistical Confidence</div>
                </div>
              </div>
              <div className="mt-4 text-center text-sm text-gray-300">
                🧠 AI learning system has collected <strong>{aiAnalytics.overview.totalLearningRecords} samples</strong> 
                and executed <strong>{aiAnalytics.overview.totalTrades} trades</strong> with 
                <strong> {aiAnalytics.learningProof.isStatisticallySignificant ? 'statistically significant' : 'emerging'}</strong> learning patterns.
              </div>
            </div>

            {/* Real-time Metrics */}
            <div className="mt-6 text-center text-xs text-gray-500">
              Last updated: {new Date(aiAnalytics.realTimeMetrics.lastUpdate).toLocaleString()}
              • Learning Active: {aiAnalytics.realTimeMetrics.isLearningActive ? '✅' : '❌'}
              • {aiAnalytics.realTimeMetrics.learningRecordsPerDay.toFixed(1)} records/day
              • {aiAnalytics.realTimeMetrics.tradesPerDay.toFixed(1)} trades/day
            </div>
          </div>
        ) : (
          <div className="flex items-center justify-center py-12">
            <div className="text-center">
              <span className="text-red-400 text-lg">⚠️</span>
              <p className="text-gray-400 mt-2">Unable to load AI analytics</p>
              <button 
                onClick={fetchData}
                className="mt-4 px-4 py-2 bg-blue-600 hover:bg-blue-700 rounded text-white text-sm"
              >
                Retry
              </button>
            </div>
          </div>
        )}
      </div>

      {/* Overview Section */}
      <div className="card card-gradient">
        {loading ? (
          <div className="flex items-center justify-center py-12">
            <div className="spinner"></div>
            <span className="ml-2 text-gray-400">Loading overview...</span>
          </div>
        ) : (
          <div className="p-6">
            <h2 className="text-xl font-bold text-white mb-6">Trading Overview</h2>
            <div className="grid grid-cols-1 md:grid-cols-3 gap-6">
              <div className="text-center">
                <div className="text-3xl mb-2">🎯</div>
                <div className="text-lg font-semibold text-white">Strategy Performance</div>
                <div className="text-sm text-gray-400 mt-2">AI-powered analysis with continuous learning</div>
              </div>
              <div className="text-center">
                <div className="text-3xl mb-2">🔄</div>
                <div className="text-lg font-semibold text-white">Automated Execution</div>
                <div className="text-sm text-gray-400 mt-2">24/7 market monitoring and trade execution</div>
              </div>
              <div className="text-center">
                <div className="text-3xl mb-2">📊</div>
                <div className="text-lg font-semibold text-white">Risk Management</div>
                <div className="text-sm text-gray-400 mt-2">Advanced stop-loss and position sizing</div>
              </div>
            </div>
          </div>
        )}
      </div>
    </div>
  )
}
