import { Badge } from "@/components/ui/badge";
import { Button } from "@/components/ui/button";
import { Dialog, DialogContent, DialogHeader, DialogTitle } from "@/components/ui/dialog";
import { Calendar, Check, FileText, Settings, X } from "lucide-react";
import { useState } from "react";

interface MeasurementStandard {
  id: string;
  name: string;
  shortName: string;
  type: string;
  registryNumber: string;
  range: string;
  accuracy: string;
  certificateNumber: string;
  validUntil: string;
}

interface StandardsSelectorProps {
  isOpen: boolean;
  onClose: () => void;
  value: string[];
  onChange: (value: string[]) => void;
  registryNumber?: string;
}

// Моковые данные для эталонов
const mockStandards: MeasurementStandard[] = [
  {
    id: "1",
    name: "Эталон массы 1 кг",
    shortName: "ЭМ-1кг",
    type: "Масса",
    registryNumber: "ГРСИ 12345-01",
    range: "0.5-2 кг",
    accuracy: "±0.001 г",
    certificateNumber: "СИ-2024-001",
    validUntil: "2025-12-31",
  },
  {
    id: "2",
    name: "Эталон длины 1 м",
    shortName: "ЭД-1м",
    type: "Длина",
    registryNumber: "ГРСИ 12345-02",
    range: "0.5-2 м",
    accuracy: "±0.001 мм",
    certificateNumber: "СИ-2024-002",
    validUntil: "2025-06-30",
  },
  {
    id: "3",
    name: "Эталон температуры 20°C",
    shortName: "ЭТ-20°C",
    type: "Температура",
    registryNumber: "ГРСИ 12345-03",
    range: "15-25°C",
    accuracy: "±0.01°C",
    certificateNumber: "СИ-2024-003",
    validUntil: "2025-03-15",
  },
  {
    id: "4",
    name: "Эталон давления 1 Па",
    shortName: "ЭД-1Па",
    type: "Давление",
    registryNumber: "ГРСИ 12345-04",
    range: "0.5-2 Па",
    accuracy: "±0.001 Па",
    certificateNumber: "СИ-2024-004",
    validUntil: "2025-09-20",
  },
  {
    id: "5",
    name: "Эталон времени 1 с",
    shortName: "ЭВ-1с",
    type: "Время",
    registryNumber: "ГРСИ 12345-05",
    range: "0.5-2 с",
    accuracy: "±0.000001 с",
    certificateNumber: "СИ-2024-005",
    validUntil: "2025-12-01",
  },
];

export function StandardsSelector({
  isOpen,
  onClose,
  value = [],
  onChange,
  registryNumber = "ГРСИ 12345"
}: StandardsSelectorProps) {
  const [selectedStandards, setSelectedStandards] = useState<string[]>(value);

  const toggleStandard = (standardId: string) => {
    setSelectedStandards(prev => {
      if (prev.includes(standardId)) {
        return prev.filter(id => id !== standardId);
      } else if (prev.length < 7) {
        return [...prev, standardId];
      }
      return prev;
    });
  };

  const handleSave = () => {
    onChange(selectedStandards);
    onClose();
  };

  const handleClose = () => {
    setSelectedStandards(value); // Сбрасываем к исходному значению
    onClose();
  };

  const isExpiringSoon = (validUntil: string) => {
    const expiryDate = new Date(validUntil);
    const now = new Date();
    const monthsUntilExpiry = (expiryDate.getTime() - now.getTime()) / (1000 * 60 * 60 * 24 * 30);
    return monthsUntilExpiry <= 3;
  };

  return (
    <Dialog open={isOpen} onOpenChange={handleClose}>
      <DialogContent className="max-w-4xl max-h-[90vh] overflow-hidden">
        <DialogHeader>
          <div className="flex items-center justify-between">
            <div>
              <DialogTitle className="text-lg flex items-center gap-2">
                <Settings className="w-5 h-5" />
                Измерительные эталоны
              </DialogTitle>
              <p className="text-sm text-muted-foreground mt-1">
                ГРСИ: {registryNumber} • Выбрано: {selectedStandards.length}/7
              </p>
            </div>
            <Button variant="ghost" size="sm" onClick={handleClose}>
              <X className="w-4 h-4" />
            </Button>
          </div>
        </DialogHeader>
        
        <div className="space-y-4">
          <div className="grid grid-cols-1 md:grid-cols-2 gap-3 max-h-96 overflow-y-auto">
            {mockStandards.map((standard) => {
              const isSelected = selectedStandards.includes(standard.id);
              const isExpiring = isExpiringSoon(standard.validUntil);
              
              return (
                <div
                  key={standard.id}
                  onClick={() => toggleStandard(standard.id)}
                  className={`p-3 rounded-lg border cursor-pointer transition-all duration-200 ${
                    isSelected
                      ? "border-primary bg-primary/10 shadow-sm"
                      : "border-border hover:border-primary/50 hover:bg-primary/5"
                  }`}
                >
                  <div className="flex items-start gap-3">
                    <div className={`mt-1 w-5 h-5 rounded-full border-2 flex items-center justify-center transition-colors ${
                      isSelected 
                        ? "border-primary bg-primary" 
                        : "border-border"
                    }`}>
                      {isSelected && <Check className="w-3 h-3 text-primary-foreground" />}
                    </div>
                    
                    <div className="flex-1 min-w-0">
                      <div className="flex items-start justify-between gap-2">
                        <div className="flex-1">
                          <div className="font-medium text-sm text-foreground leading-tight">
                            {standard.shortName}
                          </div>
                          <div className="text-xs text-muted-foreground mt-1 line-clamp-2">
                            {standard.name}
                          </div>
                        </div>
                        
                        <div className="flex flex-col gap-1 shrink-0">
                          <Badge variant="secondary" className="text-xs">
                            {standard.accuracy}
                          </Badge>
                          {isExpiring && (
                            <Badge variant="destructive" className="text-xs">
                              <Calendar className="w-3 h-3 mr-1" />
                              Истекает
                            </Badge>
                          )}
                        </div>
                      </div>
                      
                      <div className="mt-2 space-y-1">
                        <div className="flex items-center gap-1 text-xs text-muted-foreground">
                          <FileText className="w-3 h-3" />
                          {standard.registryNumber}
                        </div>
                        <div className="text-xs text-muted-foreground">
                          Диапазон: {standard.range}
                        </div>
                        <div className="text-xs text-muted-foreground">
                          Действует до: {new Date(standard.validUntil).toLocaleDateString('ru-RU')}
                        </div>
                      </div>
                    </div>
                  </div>
                </div>
              );
            })}
          </div>
          
          <div className="flex items-center justify-between pt-4 border-t">
            <div className="text-sm text-muted-foreground">
              Максимум 7 эталонов. Выбрано: {selectedStandards.length}
            </div>
            <div className="flex gap-2">
              <Button variant="outline" onClick={handleClose}>
                Отмена
              </Button>
              <Button onClick={handleSave}>
                Сохранить
              </Button>
            </div>
          </div>
        </div>
      </DialogContent>
    </Dialog>
  );
}