import React, { useState, useMemo } from 'react';
import { useResults } from './hooks/useResults';
import ModelSelector from './components/ModelSelector';
import MetricCard from './components/MetricCard';
import BarChartView from './components/BarChartView';
import RadarView from './components/RadarView';
import LineTrendView from './components/LineTrendView';
import ComparisonTable from './components/ComparisonTable';
import AddModelForm from './components/AddModelForm';
import LanguageLevelTable from './components/LanguageLevelTable';
import { ChartRow, ModelMetrics } from './types';
import axios from 'axios';

const colors = ['#4F46E5', '#059669', '#DC2626', '#7C3AED', '#EA580C', '#0891B2'];
const metrics = ['bleu','chrf','cer','wer','rouge1','rouge2','rougeL','quality_score'];

function App() {
  const { data, error } = useResults();
  const [selectedMetric, setSelectedMetric] = useState(metrics[0]);
  const [selectedModel, setSelectedModel] = useState('');
  const [selectedModels, setSelectedModels] = useState<string[]>([]);
  const [comparisonMode, setComparisonMode] = useState(false);
  const [viewMode, setViewMode] = useState<'overview' | 'detailed'>('overview');
  const [activeTab, setActiveTab] = useState<'dashboard' | 'addModel' | 'comparison'>('dashboard');
  const [newModelName, setNewModelName] = useState('');
  const [isEvaluating, setIsEvaluating] = useState(false);
  const [evaluationError, setEvaluationError] = useState<string | null>(null);

  const handleEvaluate = async () => {
    if (!newModelName.trim()) {
      setEvaluationError('Model name cannot be empty.');
      return;
    }

    setIsEvaluating(true);
    setEvaluationError(null);

    try {
      const response = await axios.post('http://localhost:8000/evaluate', {
        model_name: newModelName,
      });

      // Handle success
      alert(`Evaluation successful! Metrics: ${JSON.stringify(response.data.metrics)}`);
      setNewModelName(''); // Clear the input field
    } catch (error: any) {
      // Handle error
      setEvaluationError(error.response?.data?.detail || 'An error occurred during evaluation.');
    } finally {
      setIsEvaluating(false);
    }
  };

  const modelNames = data ? Object.keys(data) : [];
  const languagePairs = data && selectedModel && data[selectedModel] 
    ? Object.keys(data[selectedModel]).filter(k => k !== 'averages') 
    : [];
  const barChartData: ChartRow[] = useMemo(() => {
    if (!data || !selectedModel || !data[selectedModel]) return [];
    return languagePairs.map(pair => {
      const row: any = { name: pair.toUpperCase() };
      if (comparisonMode) {
        selectedModels.forEach((m, i) => {
          row[m] = data[m]?.[pair]?.[selectedMetric as keyof ModelMetrics] ?? 0;
        });
      } else {
        row[selectedMetric] = data[selectedModel]?.[pair]?.[selectedMetric as keyof ModelMetrics] ?? 0;
      }
      return row;
    });
  }, [data, languagePairs, selectedMetric, comparisonMode, selectedModels]);

  const radarData: ChartRow[] = useMemo(() => {
    if (!data || !selectedModel || !data[selectedModel]) return [];
    return metrics.map(metric => {
      const point: any = { metric: metric.toUpperCase() };
      if (comparisonMode) {
        selectedModels.forEach((m, i) => {
          point[m] = data[m]?.averages?.[metric as keyof ModelMetrics] ?? 0;
        });
      } else {
        point.value = data[selectedModel]?.averages?.[metric as keyof ModelMetrics] ?? 0;
      }
      return point;
    });
  }, [data, selectedModel, selectedModels, comparisonMode]);

  if (error) return <div className="p-6 text-red-600">Error: {error}</div>;
  if (!data) return <div className="p-6">Loading...</div>;

  return (
    <div className="min-h-screen bg-gradient-to-br from-blue-50 to-indigo-100">
      {/* Main Navigation Tabs */}
      <div className="bg-white shadow-sm border-b">
        <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
          <div className="flex justify-between items-center py-6">
            <h1 className="text-3xl font-bold text-gray-900">Translation Leaderboard</h1>
            <div className="flex space-x-4">
              <button
                onClick={() => setActiveTab('dashboard')}
                className={`px-4 py-2 rounded-lg font-medium ${
                  activeTab === 'dashboard' ? 'bg-indigo-600 text-white' : 'bg-gray-200 text-gray-700 hover:bg-gray-300'
                }`}
              >
                Dashboard
              </button>
              <button
                onClick={() => setActiveTab('comparison')}
                className={`px-4 py-2 rounded-lg font-medium ${
                  activeTab === 'comparison' ? 'bg-indigo-600 text-white' : 'bg-gray-200 text-gray-700 hover:bg-gray-300'
                }`}
              >
                Comparison
              </button>
              <button
                onClick={() => setActiveTab('addModel')}
                className={`px-4 py-2 rounded-lg font-medium ${
                  activeTab === 'addModel' ? 'bg-indigo-600 text-white' : 'bg-gray-200 text-gray-700 hover:bg-gray-300'
                }`}
              >
                Add Model
              </button>
            </div>
          </div>
        </div>
      </div>

      {/* Content Based on Active Tab */}
      <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-8">
        {activeTab === 'dashboard' && (
          <div>
            <h2 className="text-2xl font-bold mb-4">Dashboard</h2>
            {/* Toggle Button for Comparison Mode */}
            <div className="mb-6">
              <button
                onClick={() => setComparisonMode(!comparisonMode)}
                className={`px-4 py-2 rounded-lg font-medium ${
                  comparisonMode ? 'bg-red-600 text-white' : 'bg-indigo-600 text-white'
                }`}
              >
                {comparisonMode ? 'Disable Comparison Mode' : 'Enable Comparison Mode'}
              </button>
            </div>

            <ModelSelector
              modelNames={modelNames}
              selectedModel={selectedModel}
              selectedModels={selectedModels}
              comparisonMode={comparisonMode}
              onSelectModel={setSelectedModel}
              onToggleModel={m =>
                setSelectedModels(prev =>
                  prev.includes(m) ? prev.filter(x => x !== m) : [...prev, m]
                )
              }
            />

            <div className="grid grid-cols-1 lg:grid-cols-4 gap-6 mb-8">
              {/* Summary cards */}
              {!comparisonMode ? (
                <>
                  {data[selectedModel]?.averages && (
                    <MetricCard
                      title="Average BLEU"
                      value={data[selectedModel].averages.bleu}
                      description="Translation quality"
                      colorHex={colors[0]}
                    />
                  )}
                  {/* Other cards */}
                </>
              ) : (
                selectedModels.map((m, i) => (
                  data[m]?.averages && (
                    <MetricCard
                      key={m}
                      title="Avg BLEU"
                      value={data[m].averages.bleu}
                      description={m}
                      colorHex={colors[i]}
                    />
                  )
                ))
              )}
            </div>

            {viewMode === 'overview' ? (
              <>
                
                <ComparisonTable data={data} metrics={metrics} />
                <BarChartView
                  data={barChartData}
                  metrics={metrics}
                  selectedMetric={selectedMetric}
                  onMetricChange={setSelectedMetric}
                  comparisonMode={comparisonMode}
                  colors={colors}
                  selectedModels={selectedModels}
                />
                
              </>
            ) : (
              <>
                <RadarView data={radarData} comparisonMode={comparisonMode} colors={colors} />
                <LineTrendView data={barChartData} selectedModels={selectedModels} comparisonMode={comparisonMode} colors={colors} />
              </>
            )}
          </div>
        )}
        {activeTab === 'addModel' && (
          <div>
            <h2 className="text-2xl font-bold mb-4">Add a New Model</h2>
            <AddModelForm
              newModelName={newModelName}
              isEvaluating={isEvaluating}
              onNameChange={setNewModelName}
              onEvaluate={handleEvaluate}
            />
            {evaluationError && <p className="text-red-600 mt-4">{evaluationError}</p>}
          </div>
        )}
        {activeTab === 'comparison' && (
          <div>
            <h2 className="text-2xl font-bold mb-4">Comparison</h2>
            <ModelSelector
              modelNames={modelNames}
              selectedModel={selectedModel}
              selectedModels={selectedModels}
              comparisonMode={comparisonMode}
              onSelectModel={setSelectedModel}
              onToggleModel={m =>
                setSelectedModels(prev =>
                  prev.includes(m) ? prev.filter(x => x !== m) : [...prev, m]
                )
              }
            />
            <RadarView data={radarData} comparisonMode={comparisonMode} colors={colors} />
            <ComparisonTable data={data} metrics={metrics} />
            <LineTrendView data={barChartData} selectedModels={selectedModels} comparisonMode={comparisonMode} colors={colors} />
          </div>
        )}
        {activeTab === 'dashboard' && (
          <div>
            <h2 className="text-2xl font-bold mb-4">Dashboard</h2>
            <LanguageLevelTable
              data={data}
              selectedModels={selectedModels}
              metrics={metrics}
              colors={colors}
            />
          </div>
        )}
        {activeTab === 'comparison' && (
          <div>
            <h2 className="text-2xl font-bold mb-4">Comparison</h2>
            <LanguageLevelTable
              data={data}
              selectedModels={selectedModels}
              metrics={metrics}
              colors={colors}
            />
          </div>
        )}
      </div>
    </div>
  );
}

export default App;