#include<iostream>
#include<iomanip>
using namespace std;

int main(){
  
  //Variable Declaration
  int itemID[100];
  string itemName[100];
  double itemPrice[100];
  int itemQty[100];
  int choice;
  int count=0;
  
  do{
    cout<<"\n===== MINI STORE =====\n";
    cout<<"1. Add Item"<<endl;
    cout<<"2. Show Items"<<endl;
    cout<<"3. Search Item"<<endl;
    cout<<"4. Update Item"<<endl;
    cout<<"5. Delete Item"<<endl;
    cout<<"6. Calculate Inventory Value"<<endl;
    cout<<"7. Exit"<<endl;
    
    cout<<"\nEnter your choice: ";
    cin>>choice;
    
    switch(choice){
      case 1:
        {
          cout<<"==== 1. Add Item ====\n";
          cout<<"Enter Item ID: ";
          cin>>itemID[count];
          cout<<"Enter Item Name: ";
          cin>>itemName[count];
          cout<<"Enter Item Price: ";
          cin>>itemPrice[count];
          cout<<"Enter Item Qty: ";
          cin>>itemQty[count];
          count++;
          break;
        }
      case 2:
        {
          cout<<"==== 2. Show Items ====\n";
          cout<<left
            <<setw(10)<<"ID"
            <<setw(20)<<"Name"
            <<setw(10)<<"Price"
            <<setw(10)<<"Quantity"<<endl;
            
          for(int i=0; i<count; i++){
            cout<<left
            <<setw(10)<<itemID[i]
            <<setw(20)<<itemName[i]
            <<setw(10)<<itemPrice[i]
            <<setw(10)<<itemQty[i]<<endl;
          }
          break;
        }
      case 3:
        {
          int searchID;
          bool found=false;
          cout<<"==== 3. Search Items ====\n";
          cout<<"Enter ID: ";
          cin>>searchID;
          for(int i=0; i<count; i++){
            if(itemID[i]==searchID){
              cout<<"Item Found."<<endl;
              cout<<left<<setw(10)<<"ID: "<<itemID[i]<<endl;
              cout<<left<<setw(10)<<"Name: "<<itemName[i]<<endl;
              cout<<left<<setw(10)<<"Price: "<<itemPrice[i]<<endl;
              cout<<left<<setw(10)<<"Quantity: "<<itemQty[i]<<endl;
              found=true;
              break;
            }
          }
          if(!found){
            cout<<"Not found."<<endl;
          }
          break;
        }
      case 4:
        {
          int updateID;
          bool found=false;
          cout<<"==== 4. Updating Items ====\n";
          cout<<"Enter ID: ";
          cin>>updateID;
          for(int i=0; i<count; i++){
            if(itemID[i]==updateID){
              cout<<"New ID: ";
              cin>>itemID[i];
              cout<<"New Name: ";
              cin>>itemName[i];
              cout<<"New Price: ";
              cin>>itemPrice[i];
              cout<<"New Quantity: ";
              cin>>itemQty[i];
              cout<<"Item Updated."<<endl;
              found = true;
              break;
            }            
          }
          if(!found){
            cout<<"Not found."<<endl;
          }
          break;
        }
      case 5:
        {
          int deleteID;
          bool found = false;
          cout<<"==== 5. Delete Items ====\n";
          cout<<"Enter ID: ";
          cin>>deleteID;
          for(int i=0; i<count; i++){
            if(itemID[i]==deleteID){
              for(int j=i; j<count-1; j++){
                itemID[j] = itemID[j+1];
                itemName[j] = itemName[j+1];
                itemPrice[j] = itemPrice[j+1];
                itemQty[j] = itemQty[j+1];                
              }
              count--;
              cout<<"Item Deleted!"<<endl;
              found = true;
              break;
            }
          }
          if(!found){
            cout<<"Not found."<<endl;
          }
          break;
        }
      case 6:
        {
          double totalValue=0;
          cout<<"==== 6. Calculating Total Value of Items ====\n";
          for(int i=0; i<count; i++){
            totalValue += itemPrice[i] * itemQty[i];
          }
          cout<<"Total Value of All Items in Stock: "<<totalValue<<endl;
        break;
        }
      case 7:
        {  
          cout<<"Thank you! Good bye!";
          break;
        }
      default:
        {
          cout<<"wrong choice, please try again!"<<endl;
        }
    }
    
  }while(choice!=7);
  
  return 0;
}