/*Inventory Schildt*/

#include "stdafx.h"
#include <iostream>
#include <cctype>
#include <cstring>
#include <cstdlib>
#include <conio.h>
using namespace std;

const int SIZE = 2;

struct int_type {
	char item[40];
	double cost;
	double retail;
	int on_hand;
	int lead_time;
} invtry[SIZE];

int status = 0;
void enter(), init_list(), display();
void update(), input(int i);
int menu();

int find_product();
void delete_product(), remove_sklad();
int testEmpty();


int main() {

	char choice;

	init_list();

	choice = menu();

	for (;;) {
		switch (choice)
		{
		case 'e': enter();
			break;
		case 'd': display();
			break;
		case 'u': update();
			break;
		case 'f': find_product();
			break;
		case 'w': delete_product();
			break;
		case 'r': remove_sklad();
			break;
		case 'q': return 0;
		}


		if (status == -1) {
			cout << "Choise a new comand: " << endl;
			choice = menu();
		}

	}

	return 0;
}

void init_list() {
	for (int i = 0; i < SIZE; i++) {
		*invtry[i].item = '\0';
	}
}

int menu() {
	char ch;

	do {
		cout << "(E)nter" << endl;
		cout << "(D)isplay" << endl;
		cout << "(U)pdate" << endl;
		cout << "(F)ind product" << endl;
		cout << "(W)ithdrawal product" << endl;
		cout << "(R)emove inventory" << endl;
		cout << "(Q)uit" << endl << endl;
		if(status != -1) cout << "Choise a comand: ";
		cin >> ch;
	} while (!strchr("eduqfwr", tolower(ch)));

	return tolower(ch);
}

void enter() {
	int i;

	for (i = 0; i < SIZE; i++) {
		if (!*invtry[i].item) break;
	}

	if (i == SIZE) {
		cout << "List is full" << endl << endl;
		status = -1;
		return;
	}

	input(i);
}

void input(int i) {
	cout << "Name: ";
	cin >> invtry[i].item;

	cout << "Cost: ";
	cin >> invtry[i].cost;

	cout << "Retail cost: ";
	cin >> invtry[i].retail;

	cout << "On hand: ";
	cin >> invtry[i].on_hand;

	cout << "Time: ";
	cin >> invtry[i].lead_time;
	cout << endl;
}

void update() {
	int i;
	i = find_product();

	if (i != -1) {
		cout << "Enter new information's." << endl;
		input(i);
	}
}

void display() {
	if (testEmpty() == 1) {
		for (int i = 0; i < SIZE; i++) {
			if (*invtry[i].item) {
				cout << invtry[i].item << endl;

				cout << "Cost: " << invtry[i].cost << endl;

				cout << "Retail cost: " << invtry[i].retail << endl;

				cout << "On hand: " << invtry[i].on_hand << endl;

				cout << "Time: " << invtry[i].lead_time << endl << endl;

			}
		}
	}
	else {
		cout << "Inventory is empty." << endl << endl;
	}
}

int find_product() {
	int i;
	char name[40];

	cout << "Enter name of product: ";
	cin >> name;

	for (i = 0; i < SIZE; i++) {
		if (!strcmp(name, invtry[i].item)) break;
	}

	if (i == SIZE) {
		cout << "Product is not found" << endl << endl;
		return -1;
	}
	else {
		cout << "Product is found. His index: " << i << endl << endl;
		return i;
	}

}

void delete_product() {
	int index;
	cout << "Deliting product. ";
	index = find_product();

	if (index != -1) {
		*invtry[index].item = '\0';
	}

}

void remove_sklad() {
	for (int i = 0; i < SIZE; i++) {
		*invtry[i].item = '\0';
	}
}

int testEmpty() {
	int i;
	for (i = 0; i < SIZE; i++) {
		if (*invtry[i].item) break;
	}
	if (i == SIZE) {
		status = -1;
		return -1;
	}
	else return 1;
}