import React, { useState, useEffect } from 'react';
import { CirclePlus, Save, Check } from 'lucide-react';
import BudgetInputCard from './BudgetInputCard';
import { Button } from '@/components/ui/button';
import CategoryBudgetInputs from './CategoryBudgetInputs';
import { EXPENSE_CATEGORIES } from '@/constants/categoryIcons';

interface BudgetData {
  targetAmount: number;
  spentAmount: number;
  remainingAmount: number;
}
interface BudgetTabContentProps {
  data: BudgetData;
  formatCurrency: (amount: number) => string;
  calculatePercentage: (spent: number, target: number) => number;
  onSaveBudget: (amount: number, categoryBudgets?: Record<string, number>) => void;
}

const BudgetTabContent: React.FC<BudgetTabContentProps> = ({
  data,
  formatCurrency,
  calculatePercentage,
  onSaveBudget
}) => {
  const [categoryBudgets, setCategoryBudgets] = useState<Record<string, number>>({});
  const [showBudgetInput, setShowBudgetInput] = useState(false);
  const spentAmount = data.spentAmount;
  const targetAmount = data.targetAmount;

  // 실제 백분율 계산 (초과해도 실제 퍼센트로 표시)
  const actualPercentage = targetAmount > 0 ? Math.round(spentAmount / targetAmount * 100) : 0;
  const percentage = actualPercentage;
  
  // 예산이 설정되었는지 여부 확인 (정확히 0이면 미설정으로 간주)
  const isBudgetSet = targetAmount > 0;

  // 예산 초과 여부 계산
  const isOverBudget = spentAmount > targetAmount && targetAmount > 0;
  // 예산이 얼마 남지 않은 경우 (10% 미만)
  const isLowBudget = targetAmount > 0 && percentage >= 90 && percentage < 100;

  // 프로그레스 바 색상 결정
  const progressBarColor = isOverBudget ? 'bg-red-500' : isLowBudget ? 'bg-yellow-400' : 'bg-neuro-income';

  // 남은 예산 또는 초과 예산 텍스트 및 금액
  const budgetStatusText = isOverBudget ? '예산 초과: ' : '남은 예산: ';
  const budgetAmount = isOverBudget ? formatCurrency(Math.abs(targetAmount - spentAmount)) : formatCurrency(Math.max(0, targetAmount - spentAmount));
  
  const handleCategoryInputChange = (value: string, category: string) => {
    const numValue = parseInt(value, 10) || 0;
    setCategoryBudgets(prev => ({
      ...prev,
      [category]: numValue
    }));
  };

  // 카테고리별 예산 합계 계산
  const calculateTotalBudget = () => {
    // 모든 EXPENSE_CATEGORIES에 있는 카테고리 포함해서 합계 계산
    let total = 0;
    EXPENSE_CATEGORIES.forEach(category => {
      total += categoryBudgets[category] || 0;
    });
    console.log('카테고리 예산 총합:', total, categoryBudgets);
    return total;
  };

  // 카테고리 예산 저장
  const handleSaveCategoryBudgets = () => {
    // 카테고리 예산 기본값 설정 - 모든 카테고리 포함
    const updatedCategoryBudgets: Record<string, number> = {};
    EXPENSE_CATEGORIES.forEach(category => {
      updatedCategoryBudgets[category] = categoryBudgets[category] || 0;
    });
    
    const totalBudget = calculateTotalBudget();
    console.log('카테고리 예산 저장 및 총 예산 설정:', totalBudget, updatedCategoryBudgets);
    
    // 총액이 0이 아닐 때만 저장 처리
    if (totalBudget > 0) {
      onSaveBudget(totalBudget, updatedCategoryBudgets);
      setShowBudgetInput(false);
    } else {
      alert('예산을 입력해주세요.');
    }
  };

  // 기존 카테고리 예산 불러오기
  useEffect(() => {
    if (showBudgetInput) {
      // 로컬 스토리지에서 카테고리 예산 불러오기
      try {
        const storedCategoryBudgets = localStorage.getItem('categoryBudgets');
        if (storedCategoryBudgets) {
          const parsedBudgets = JSON.parse(storedCategoryBudgets);
          console.log('저장된 카테고리 예산 불러옴:', parsedBudgets);
          setCategoryBudgets(parsedBudgets);
        }
      } catch (error) {
        console.error('카테고리 예산 불러오기 오류:', error);
      }
    }
  }, [showBudgetInput]);

  // 예산 버튼 클릭 핸들러 - 토글 기능 추가
  const toggleBudgetInput = () => {
    setShowBudgetInput(prev => !prev);
  };

  // 예산 여부에 따른 텍스트 결정
  const budgetButtonText = isBudgetSet ? "예산 수정하기" : "예산 입력하기";

  return (
    <div>
      {isBudgetSet ? (
        <>
          <div className="flex justify-between items-center mb-3">
            <div className="text-base font-bold">{formatCurrency(spentAmount)}</div>
            <div className="text-sm text-gray-500">/ {formatCurrency(targetAmount)}</div>
          </div>

          <div className="w-full h-2 neuro-pressed overflow-hidden mb-3">
            <div
              className={`h-full ${progressBarColor} transition-all duration-700 ease-out`}
              style={{
                width: `${Math.min(percentage, 100)}%`,
              }}
            />
          </div>

          <div className="flex justify-between items-center">
            <div className={`text-sm font-medium ${isOverBudget ? 'text-red-500' : 'text-gray-500'}`}>
              {budgetStatusText}{budgetAmount}
            </div>
            <div className="text-sm font-medium text-gray-500">
              {percentage}%
            </div>
          </div>

          <div className="mt-6">
            <button
              onClick={toggleBudgetInput}
              className="text-neuro-income hover:underline flex items-center text-base font-semibold group"
            >
              <CirclePlus size={26} className="mr-2 text-neuro-income transition-transform group-hover:scale-110" />
              <span className="text-base font-semibold">{budgetButtonText}</span>
            </button>
          </div>
        </>
      ) : (
        <div className="py-4 text-center">
          <div className="text-gray-400 mb-4">아직 예산이 설정되지 않았습니다</div>
          <Button onClick={toggleBudgetInput} variant="default" className="bg-neuro-income hover:bg-neuro-income/90 animate-pulse shadow-lg">
            <CirclePlus className="mr-2" size={24} />
            <span className="animate-pulse">{budgetButtonText}</span>
          </Button>
        </div>
      )}

      {showBudgetInput && (
        <div className="mt-4">
          <div className="neuro-card p-4">
            <div>
              <h3 className="text-base font-medium mb-3">카테고리별 월간 예산 설정</h3>
              <p className="text-sm text-gray-500 mb-4">카테고리별로 월간 예산을 설정하세요. 일일, 주간 예산은 자동으로 계산됩니다.</p>
              <CategoryBudgetInputs categoryBudgets={categoryBudgets} handleCategoryInputChange={handleCategoryInputChange} />

              <div className="mt-4 border-t border-gray-300 pt-3">
                <div className="flex justify-between items-center mb-4">
                  <h3 className="font-medium text-sm px-[34px]">월간 총 예산:</h3>
                  <p className="font-bold text-neuro-income text-base px-[10px]">{formatCurrency(calculateTotalBudget())}</p>
                </div>

                <div className="flex justify-end">
                  <Button onClick={handleSaveCategoryBudgets} size="sm" className="bg-neuro-income hover:bg-neuro-income/90 text-white mx-[6px]">
                    <Check size={18} className="mr-1" />
                    저장하기
                  </Button>
                </div>
              </div>
            </div>
          </div>
        </div>
      )}
    </div>
  );
};

export default BudgetTabContent;