import React, { useState, useCallback, useRef } from 'react';
import {
  Camera,
  CheckCircle,
  XCircle,
  Star,
  Upload,
  FileText,
  Package,
  Thermometer,
  Scale,
  Eye,
  AlertTriangle
} from 'lucide-react';
import { Modal, Button, Input, Textarea, Badge, Tabs, Card } from '../../ui';
import { TabsList, TabsTrigger, TabsContent } from '../../ui/Tabs';
import { StatusIndicatorConfig } from '../../ui/StatusCard/StatusCard';
import { statusColors } from '../../../styles/colors';
import { productionService, type QualityCheckResponse, QualityCheckStatus } from '../../../api';
import { ProductionBatchResponse } from '../../../api/types/production';
import { useCurrentTenant } from '../../../stores/tenant.store';
import { useQualityTemplatesForStage, useExecuteQualityCheck } from '../../../api/hooks/qualityTemplates';
import { ProcessStage, type QualityCheckTemplate, type QualityCheckExecutionRequest } from '../../../api/types/qualityTemplates';

export interface QualityCheckModalProps {
  isOpen: boolean;
  onClose: () => void;
  batch: ProductionBatchResponse;
  processStage?: ProcessStage;
  onComplete?: (result: QualityCheckResult) => void;
}

export interface QualityCheckCriterion {
  id: string;
  category: string;
  name: string;
  spanishName: string;
  description: string;
  type: 'visual' | 'measurement' | 'temperature' | 'weight' | 'boolean';
  required: boolean;
  weight: number;
  acceptableCriteria: string;
  minValue?: number;
  maxValue?: number;
  unit?: string;
  isCritical: boolean;
}

export interface QualityCheckResult {
  criterionId: string;
  value: number | string | boolean;
  score: number;
  notes?: string;
  photos?: File[];
  pass: boolean;
  timestamp: string;
}

export interface QualityCheckData {
  batchId: string;
  checkType: string;
  inspector: string;
  startTime: string;
  results: QualityCheckResult[];
  overallScore: number;
  overallPass: boolean;
  finalNotes: string;
  photos: File[];
  criticalFailures: string[];
  correctiveActions: string[];
}

const QUALITY_CHECK_TEMPLATES = {
  visual_inspection: {
    id: 'visual_inspection',
    name: 'Visual Inspection',
    spanishName: 'Inspección Visual',
    icon: Eye,
    criteria: [
      {
        id: 'color_uniformity',
        category: 'Apariencia',
        name: 'Color Uniformity',
        spanishName: 'Uniformidad del Color',
        description: 'Evalúa la consistencia del color en todo el producto',
        type: 'visual' as const,
        required: true,
        weight: 20,
        acceptableCriteria: 'Puntuación 7 o superior',
        minValue: 1,
        maxValue: 10,
        isCritical: false,
      },
      {
        id: 'shape_integrity',
        category: 'Estructura',
        name: 'Shape Integrity',
        spanishName: 'Integridad de la Forma',
        description: 'Verifica que el producto mantenga su forma prevista',
        type: 'boolean' as const,
        required: true,
        weight: 25,
        acceptableCriteria: 'Debe ser verdadero',
        isCritical: true,
      },
      {
        id: 'surface_texture',
        category: 'Textura',
        name: 'Surface Texture',
        spanishName: 'Textura Superficial',
        description: 'Evalúa la calidad de la textura de la superficie',
        type: 'visual' as const,
        required: true,
        weight: 15,
        acceptableCriteria: 'Puntuación 7 o superior',
        minValue: 1,
        maxValue: 10,
        isCritical: false,
      },
      {
        id: 'defects_presence',
        category: 'Defectos',
        name: 'Defects Presence',
        spanishName: 'Presencia de Defectos',
        description: 'Detecta defectos visibles o imperfecciones',
        type: 'boolean' as const,
        required: true,
        weight: 20,
        acceptableCriteria: 'Debe ser falso (sin defectos)',
        isCritical: true,
      },
      {
        id: 'size_consistency',
        category: 'Dimensiones',
        name: 'Size Consistency',
        spanishName: 'Consistencia de Tamaño',
        description: 'Evalúa la consistencia del tamaño dentro del lote',
        type: 'visual' as const,
        required: true,
        weight: 20,
        acceptableCriteria: 'Puntuación 7 o superior',
        minValue: 1,
        maxValue: 10,
        isCritical: false,
      }
    ]
  },
  weight_check: {
    id: 'weight_check',
    name: 'Weight Check',
    spanishName: 'Control de Peso',
    icon: Scale,
    criteria: [
      {
        id: 'individual_weight',
        category: 'Peso',
        name: 'Individual Weight',
        spanishName: 'Peso Individual',
        description: 'Peso individual de cada pieza',
        type: 'weight' as const,
        required: true,
        weight: 50,
        acceptableCriteria: 'Dentro del ±5% del objetivo',
        unit: 'g',
        isCritical: true,
      },
      {
        id: 'weight_variance',
        category: 'Consistencia',
        name: 'Weight Variance',
        spanishName: 'Variación de Peso',
        description: 'Variación de peso dentro del lote',
        type: 'measurement' as const,
        required: true,
        weight: 50,
        acceptableCriteria: 'Menos del 5%',
        unit: '%',
        isCritical: true,
      }
    ]
  },
  temperature_check: {
    id: 'temperature_check',
    name: 'Temperature Check',
    spanishName: 'Control de Temperatura',
    icon: Thermometer,
    criteria: [
      {
        id: 'core_temperature',
        category: 'Temperatura',
        name: 'Core Temperature',
        spanishName: 'Temperatura del Núcleo',
        description: 'Temperatura interna del producto',
        type: 'temperature' as const,
        required: true,
        weight: 70,
        acceptableCriteria: '88-95°C',
        minValue: 85,
        maxValue: 98,
        unit: '°C',
        isCritical: true,
      },
      {
        id: 'cooling_temperature',
        category: 'Temperatura',
        name: 'Cooling Temperature',
        spanishName: 'Temperatura de Enfriado',
        description: 'Temperatura durante el enfriado',
        type: 'temperature' as const,
        required: false,
        weight: 30,
        acceptableCriteria: '20-23°C',
        minValue: 18,
        maxValue: 25,
        unit: '°C',
        isCritical: false,
      }
    ]
  }
};

export const QualityCheckModal: React.FC<QualityCheckModalProps> = ({
  isOpen,
  onClose,
  batch,
  processStage,
  onComplete
}) => {
  const currentTenant = useCurrentTenant();
  const tenantId = currentTenant?.id || '';

  const [activeTab, setActiveTab] = useState('inspection');
  const [selectedTemplate, setSelectedTemplate] = useState<QualityCheckTemplate | null>(null);
  const [currentCriteriaIndex, setCurrentCriteriaIndex] = useState(0);
  const [results, setResults] = useState<Record<string, any>>({});
  const [finalNotes, setFinalNotes] = useState('');
  const [photos, setPhotos] = useState<File[]>([]);
  const [loading, setLoading] = useState(false);
  const fileInputRef = useRef<HTMLInputElement>(null);

  // Get available templates for the current stage
  const currentStage = processStage || batch.current_process_stage;
  const {
    data: templatesData,
    isLoading: templatesLoading,
    error: templatesError
  } = useQualityTemplatesForStage(tenantId, currentStage!, true, {
    enabled: !!currentStage
  });

  // Execute quality check mutation
  const executeQualityCheckMutation = useExecuteQualityCheck(tenantId);

  // Initialize selected template
  React.useEffect(() => {
    if (templatesData?.templates && templatesData.templates.length > 0 && !selectedTemplate) {
      setSelectedTemplate(templatesData.templates[0]);
    }
  }, [templatesData?.templates, selectedTemplate]);

  const availableTemplates = templatesData?.templates || [];

  const updateResult = useCallback((field: string, value: any, score?: number) => {
    setResults(prev => ({
      ...prev,
      [field]: {
        value,
        score: score !== undefined ? score : (typeof value === 'boolean' ? (value ? 10 : 0) : value),
        pass_check: score !== undefined ? score >= 7 : (typeof value === 'boolean' ? value : value >= 7),
        timestamp: new Date().toISOString()
      }
    }));
  }, []);

  const calculateOverallScore = useCallback((): number => {
    if (!selectedTemplate || Object.keys(results).length === 0) return 0;

    const templateWeight = selectedTemplate.weight || 1;
    const resultValues = Object.values(results);

    if (resultValues.length === 0) return 0;

    const averageScore = resultValues.reduce((sum: number, result: any) => sum + (result.score || 0), 0) / resultValues.length;
    return Math.min(10, averageScore * templateWeight);
  }, [selectedTemplate, results]);

  const getCriticalFailures = useCallback((): string[] => {
    if (!selectedTemplate) return [];

    const failures: string[] = [];
    selectedTemplate.criteria.forEach(criterion => {
      if (criterion.isCritical && results[criterion.id]) {
        const result = results[criterion.id];
        if (criterion.type === 'boolean' && !result.value) {
          failures.push(criterion.spanishName);
        } else if (result.score < 7) {
          failures.push(criterion.spanishName);
        }
      }
    });

    return failures;
  }, [selectedTemplate, results]);

  const handlePhotoUpload = useCallback((event: React.ChangeEvent<HTMLInputElement>) => {
    const files = Array.from(event.target.files || []);
    setPhotos(prev => [...prev, ...files]);
  }, []);

  const handleComplete = async () => {
    if (!selectedTemplate) return;

    setLoading(true);
    try {
      const overallScore = calculateOverallScore();
      const criticalFailures = getCriticalFailures();
      const passed = overallScore >= 7.0 && criticalFailures.length === 0;

      const qualityData: QualityCheckData = {
        batchId: batch.id,
        checkType: selectedTemplate.id,
        inspector: currentTenant?.name || 'Inspector',
        startTime: new Date().toISOString(),
        results: Object.values(results),
        overallScore,
        overallPass: passed,
        finalNotes,
        photos,
        criticalFailures,
        correctiveActions: criticalFailures.length > 0 ? [
          `Fallas críticas encontradas: ${criticalFailures.join(', ')}`,
          'Revisar proceso de producción',
          'Re-entrenar personal si es necesario'
        ] : []
      };

      // Create quality check via API
      const checkData = {
        batch_id: batch.id,
        check_type: selectedTemplate.id,
        check_time: new Date().toISOString(),
        quality_score: overallScore / 10, // Convert to 0-1 scale
        pass_fail: passed,
        defect_count: criticalFailures.length,
        defect_types: criticalFailures,
        check_notes: finalNotes,
        corrective_actions: qualityData.correctiveActions
      };

      await productionService.createQualityCheck(currentTenant?.id || '', checkData);

      onComplete?.(qualityData as any);
      onClose();
    } catch (error) {
      console.error('Error completing quality check:', error);
    } finally {
      setLoading(false);
    }
  };

  const renderCriteriaInput = (criterion: QualityCheckCriterion) => {
    const result = results[criterion.id];

    if (criterion.type === 'boolean') {
      return (
        <div className="space-y-4">
          <div className="flex gap-4">
            <label className="flex items-center">
              <input
                type="radio"
                name={criterion.id}
                checked={result?.value === true}
                onChange={() => updateResult(criterion.id, { value: true, score: 10, pass: true })}
                className="mr-2"
              />
              Sí / Pasa
            </label>
            <label className="flex items-center">
              <input
                type="radio"
                name={criterion.id}
                checked={result?.value === false}
                onChange={() => updateResult(criterion.id, { value: false, score: 0, pass: false })}
                className="mr-2"
              />
              No / Falla
            </label>
          </div>
        </div>
      );
    }

    if (criterion.type === 'measurement' || criterion.type === 'weight' || criterion.type === 'temperature') {
      return (
        <div className="space-y-4">
          <div className="flex items-center gap-2">
            <Input
              type="number"
              placeholder={`Ingrese ${criterion.spanishName.toLowerCase()}`}
              value={result?.value as string || ''}
              onChange={(e) => {
                const value = parseFloat(e.target.value);
                const score = !isNaN(value) ? 8 : 0; // Simplified scoring
                updateResult(criterion.id, {
                  value: e.target.value,
                  score,
                  pass: score >= 7
                });
              }}
              className="w-32"
            />
            {criterion.unit && <span className="text-sm text-[var(--text-secondary)]">{criterion.unit}</span>}
          </div>
        </div>
      );
    }

    // Visual type - 1-10 star rating
    return (
      <div className="space-y-4">
        <div className="grid grid-cols-5 gap-2">
          {[...Array(10)].map((_, i) => {
            const score = i + 1;
            const isSelected = result?.score === score;
            return (
              <button
                key={score}
                className={`p-3 rounded-lg border-2 transition-all ${
                  isSelected
                    ? 'border-[var(--color-primary)] bg-[var(--color-primary)]/10'
                    : 'border-[var(--border-primary)] hover:border-[var(--color-primary)]/50'
                }`}
                onClick={() => {
                  updateResult(criterion.id, {
                    value: score,
                    score,
                    pass: score >= 7
                  });
                }}
              >
                <div className="text-center">
                  <div className="font-bold text-[var(--text-primary)]">{score}</div>
                  <Star className={`w-4 h-4 mx-auto ${isSelected ? 'text-[var(--color-primary)] fill-current' : 'text-[var(--text-tertiary)]'}`} />
                </div>
              </button>
            );
          })}
        </div>
        <div className="text-sm text-[var(--text-secondary)]">
          <p>1-3: Malo | 4-6: Regular | 7-8: Bueno | 9-10: Excelente</p>
        </div>
      </div>
    );
  };

  const overallScore = calculateOverallScore();
  const criticalFailures = getCriticalFailures();
  const isComplete = selectedTemplate?.criteria.filter(c => c.required).every(c => results[c.id]) || false;

  const statusIndicator: StatusIndicatorConfig = {
    color: statusColors.inProgress.primary,
    text: 'Control de Calidad',
    icon: Package
  };

  return (
    <Modal
      isOpen={isOpen}
      onClose={onClose}
      title={`Control de Calidad - ${batch.product_name}`}
      subtitle={`Lote: ${batch.batch_number}`}
      size="xl"
    >
      <div className="space-y-6">
        {/* Template Selection */}
        <div className="grid grid-cols-3 gap-3">
          {Object.entries(QUALITY_CHECK_TEMPLATES).map(([key, tmpl]) => {
            const Icon = tmpl.icon;
            return (
              <button
                key={key}
                className={`p-3 rounded-lg border-2 transition-all ${
                  selectedTemplate === key
                    ? 'border-[var(--color-primary)] bg-[var(--color-primary)]/10'
                    : 'border-[var(--border-primary)] hover:border-[var(--color-primary)]/50'
                }`}
                onClick={() => {
                  setSelectedTemplate(key);
                  setCurrentCriteriaIndex(0);
                  setResults({});
                }}
              >
                <Icon className="w-6 h-6 mx-auto mb-2 text-[var(--color-primary)]" />
                <div className="font-medium text-sm">{tmpl.spanishName}</div>
              </button>
            );
          })}
        </div>

        <Tabs value={activeTab} onValueChange={setActiveTab}>
          <TabsList className="grid w-full grid-cols-3">
            <TabsTrigger value="inspection">Inspección</TabsTrigger>
            <TabsTrigger value="photos">Fotos</TabsTrigger>
            <TabsTrigger value="summary">Resumen</TabsTrigger>
          </TabsList>

          <TabsContent value="inspection" className="space-y-6">
            {selectedTemplate && (
              <>
                {/* Progress Indicator */}
                <div className="grid grid-cols-6 gap-2">
                  {selectedTemplate.criteria.map((criterion, index) => {
                    const result = results[criterion.id];
                    const isCompleted = !!result;
                    const isCurrent = index === currentCriteriaIndex;

                    return (
                      <button
                        key={criterion.id}
                        className={`p-2 rounded text-xs transition-all ${
                          isCurrent
                            ? 'bg-[var(--color-primary)] text-white'
                            : isCompleted
                            ? 'bg-green-100 text-green-800'
                            : 'bg-[var(--bg-secondary)] text-[var(--text-secondary)]'
                        }`}
                        onClick={() => setCurrentCriteriaIndex(index)}
                      >
                        {index + 1}
                      </button>
                    );
                  })}
                </div>

                {/* Current Criteria */}
                {currentCriteria && (
                  <div className="space-y-6">
                    <Card className={`p-4 ${currentCriteria.isCritical ? 'border-orange-200 bg-orange-50' : ''}`}>
                      <div className="flex justify-between items-start mb-3">
                        <div>
                          <h4 className="font-semibold text-[var(--text-primary)]">{currentCriteria.spanishName}</h4>
                          <p className="text-sm text-[var(--text-secondary)] mt-1">{currentCriteria.description}</p>
                          <p className="text-sm text-[var(--color-info)] mt-1">{currentCriteria.acceptableCriteria}</p>
                        </div>
                        <div className="flex gap-2">
                          {currentCriteria.isCritical && (
                            <Badge className="bg-[var(--color-error)]/10 text-[var(--color-error)]">
                              Crítico
                            </Badge>
                          )}
                          {currentCriteria.required && (
                            <Badge className="bg-[var(--color-warning)]/10 text-[var(--color-warning)]">
                              Requerido
                            </Badge>
                          )}
                        </div>
                      </div>

                      {renderCriteriaInput(currentCriteria)}

                      <Textarea
                        placeholder="Notas adicionales (opcional)..."
                        value={currentResult?.notes || ''}
                        onChange={(e) => {
                          updateResult(currentCriteria.id, { notes: e.target.value });
                        }}
                        rows={2}
                        className="mt-4"
                      />
                    </Card>

                    {/* Navigation */}
                    <div className="flex justify-between">
                      <Button
                        variant="outline"
                        onClick={() => setCurrentCriteriaIndex(Math.max(0, currentCriteriaIndex - 1))}
                        disabled={currentCriteriaIndex === 0}
                      >
                        Anterior
                      </Button>
                      <Button
                        variant="primary"
                        onClick={() => setCurrentCriteriaIndex(Math.min(selectedTemplate.criteria.length - 1, currentCriteriaIndex + 1))}
                        disabled={currentCriteriaIndex === selectedTemplate.criteria.length - 1}
                      >
                        Siguiente
                      </Button>
                    </div>
                  </div>
                )}
              </>
            )}
          </TabsContent>

          <TabsContent value="photos" className="space-y-4">
            <div className="text-center py-8">
              <Camera className="w-12 h-12 text-[var(--text-tertiary)] mx-auto mb-4" />
              <p className="text-[var(--text-secondary)] mb-4">
                Añade fotos para documentar problemas de calidad o evidencia
              </p>
              <Button
                variant="outline"
                onClick={() => fileInputRef.current?.click()}
              >
                <Upload className="w-4 h-4 mr-2" />
                Subir Fotos
              </Button>
              <input
                ref={fileInputRef}
                type="file"
                accept="image/*"
                multiple
                onChange={handlePhotoUpload}
                className="hidden"
              />
            </div>

            {photos.length > 0 && (
              <div className="grid grid-cols-3 gap-4">
                {photos.map((photo, index) => (
                  <div key={index} className="relative">
                    <img
                      src={URL.createObjectURL(photo)}
                      alt={`Foto de calidad ${index + 1}`}
                      className="w-full h-32 object-cover rounded-lg"
                    />
                    <button
                      className="absolute top-2 right-2 w-6 h-6 bg-red-500 text-white rounded-full flex items-center justify-center"
                      onClick={() => setPhotos(prev => prev.filter((_, i) => i !== index))}
                    >
                      ×
                    </button>
                  </div>
                ))}
              </div>
            )}
          </TabsContent>

          <TabsContent value="summary" className="space-y-6">
            {/* Overall Score */}
            <Card className="p-6 text-center">
              <div className="text-4xl font-bold text-[var(--text-primary)] mb-2">
                {overallScore.toFixed(1)}/10
              </div>
              <div className="text-lg text-[var(--text-secondary)] mb-4">
                Puntuación General de Calidad
              </div>
              <Badge
                variant={overallScore >= 7 ? 'success' : overallScore >= 5 ? 'warning' : 'error'}
                className="text-lg px-4 py-2"
              >
                {overallScore >= 7 ? 'APROBADO' : 'REPROBADO'}
              </Badge>

              {criticalFailures.length > 0 && (
                <div className="mt-4 p-3 bg-red-50 border border-red-200 rounded-lg">
                  <div className="flex items-center gap-2 text-red-800 font-medium">
                    <AlertTriangle className="w-5 h-5" />
                    Fallas Críticas Detectadas
                  </div>
                  <ul className="mt-2 text-red-700 text-sm">
                    {criticalFailures.map((failure, index) => (
                      <li key={index}>• {failure}</li>
                    ))}
                  </ul>
                </div>
              )}
            </Card>

            {/* Final Notes */}
            <Textarea
              placeholder="Notas finales y recomendaciones..."
              value={finalNotes}
              onChange={(e) => setFinalNotes(e.target.value)}
              rows={4}
            />
          </TabsContent>
        </Tabs>

        {/* Action Buttons */}
        <div className="flex justify-between pt-6 border-t border-[var(--border-primary)]">
          <Button variant="outline" onClick={onClose}>
            Cancelar
          </Button>
          <Button
            variant="primary"
            onClick={handleComplete}
            disabled={!isComplete || loading}
          >
            {loading ? 'Completando...' : 'Completar Inspección'}
          </Button>
        </div>
      </div>
    </Modal>
  );
};

export default QualityCheckModal;