#include <iostream>
#include <cstring>
#include <fstream>
#include "Books.h"
using namespace std;

//全局变量
string ID_Value;											//存储新建账户名
string ID[5];												//存储ID列表
int ID_flag;												//存储ID操作序号
fstream file;												//文件对象
void launch();												//声明RUNTIME函数

void ID_OUT()
{
	file.open("ID.txt", ios::out);
	if (!file)
	{
		cerr << "未检测到账户列表文件ID.txt！保存失败。" << endl;
		exit(1);
	}
	for (int i = 0; i < 5; i++)
		file << ID[i] << endl;
	file.close();
}

void ID_IN()
{
	file.open("ID.txt", ios::in);
	if (!file)
	{
		cerr << "未检测到预置账户列表文件ID.txt，请查看源代码末端的注释，现已使用默认测试账户登录。" << endl;
		ID_Value = "超级管理员";
		launch();
	}
	for (int i = 0; i < 5; i++)
		file >> ID[i];
	file.close();
}

void ID_Switch()
{
	ID_IN();
	for (int i = 0; i < 5; i++)
		cout << i + 1 << "\t" << ID[i] << endl;
	cout << "请选择要登录的账户：";	cin >> ID_flag;

	if (ID_flag == 5 && ID[ID_flag-1] == "选此项以新建账户")
	{
		string tmp;
		cout << "请输入新账户的ID："; cin >> tmp;
		ID[4] = ID_Value = tmp;
		cout << "新建账户成功并已写入账户列表！您现在拥有所有权限。" << endl;
		ID_OUT();
	}
	else if (ID_flag < 1 || ID_flag>5)
	{
		cerr << "该账户不存在！程序将退出。" << endl;
		abort();
	}
	else ID_Value = ID[ID_flag - 1];
	cout << "-----------------------------------------------" << endl;
}

void fileOut()
{
	file.open("书籍.txt", ios::out);
	file<<"ISBN\t\t" << setw(25) << "书名" << setw(20) << "作者" << setw(15) << "价格" << setw(15) << "库存" << endl;
	for (int i = 0; i < Bcount; i++) file << Books[i];
	file.close();
	file.open("期刊.txt", ios::out);
	cout.setf(ios_base::left);
	file << "ISBN\t\t" << setw(25) << "期刊名" << setw(20) << "出版社" << setw(20) << "价格" << setw(15) << "库存" << endl;
	for (int i = 0; i < Jcount; i++)file << Journals[i];
	cout << "已成功输出为'书籍.txt'与'期刊.txt'" << endl;
	file.close();
}

void welcome()
{
	cout << "==============================="
		<< endl << setw(30) << "欢迎使用小型书店进销存管理系统"
		<< endl << "==============================="
		<< endl << "注：该程序仅用于江西财经大学张老师《C++程序设计语言》课程之期末综合性实验报告，作者：刘燕、李溦、钟琳"
		<< endl << "-----------------------------------------------"
		<< endl << "预置账户列表：" << endl;
	ID_Switch();
	launch();
}

void launch()
{
	Admin admin(ID_Value);
	int select = 1;
	while (select)
	{
		cout << setw(20) << "————————————————" << endl
			<< "当前用户：" << admin.getID() << endl
			<< "1.查看当前库存" << endl
			<< "2.增加书刊信息" << endl
			<< "3.修改书刊信息" << endl
			<< "4.删除书刊信息" << endl
			<< "5.增加书刊库存" << endl
			<< "6.书刊销售系统" << endl
			<< "7.当前财务统计" << endl
			<< "8.更改管理员ID" << endl
			<< "9.切换登录账户" << endl
			<< "10.将库存信息输出至文件" << endl
			<< "0.退出书店系统" << endl
			<< setw(20) << "————————————————" << endl;
		cout << "请输入操作序号：";
		cin >> select;
		if (select < 0 || select >10)
		{
			cerr << "非法值，请重新输入。" << endl;
			continue;
		}
		else
		{
			switch (select)
			{
			case 1: admin.printAll(); continue;
			case 2: admin.AddBook(); continue;
			case 3: admin.modify();continue;
			case 4: admin.DelBook(); continue;
			case 5: admin.inStock(); continue;
			case 6: admin.outStock(); continue;
			case 7: admin.statics(); continue;
			case 8:
			{
				string id;
				cout << "输入目标ID：";
				cin >> id;
				admin.changeID(id);
				ID[ID_flag - 1] = id;
				cout << "更改成功！当前ID为" << id << endl;
				ID_OUT();
				continue;
			}
			case 9: system("cls"); welcome(); break;
			case 10: fileOut(); continue;
			case 0: break;
			}
		}
	}
}
int main()
{
	welcome();
	return 0;
}