#include "MangerBook.h"
#include "Book.h"
#include <fstream>
#include <string>
#include <algorithm>
#include <cmath>

MangerBook::MangerBook()//构造函数
{
    this->Book_Array = new vector<Book*>;
    this->Init_Book();//初始化
}

void MangerBook::Init_Book()
{
    /*
    ifstream fi;
    fi.open("D:/c++一些代码/library class版/library class版/图书信息.txt",ios::in);
    if (!fi.is_open()) {
        std::cerr << "无法打开文件" << std::endl;
        return;
    }
    string _name;
    int _year,_month,_day;
    int _isleadbook;
    int _times;
    while(fi>>_name&&fi>>_year&&fi>>_month && fi>>_day&&fi>>_isleadbook&&fi>>_times)
    {
        Date _data(_year,_month,_day);
        Book *_pstu = NULL;
        if(_isleadbook==0)
            _pstu = new Book(_name,_data,true,_times);
        else
            _pstu = new Book(_name,_data,false,_times);
        this->Book_Array->push_back(_pstu);
    }
    fi.close();
    */
    //初始六本书，本来想用文件输入，但是无法输出,最后也没有解决，上面注释是输入失败的代码
   Book* _pstu1 = NULL;
    Date _data1(2024, 3, 4);
    _pstu1 = new Book("数据结构基础", _data1, false, 117);
    this->Book_Array->push_back(_pstu1);

    Book* _pstu2 = NULL;
    Date _data2(2023, 10, 17);
    _pstu2 = new Book("红楼梦", _data2, true, 11);
    this->Book_Array->push_back(_pstu2);

    Book* _pstu3 = NULL;
    Date _data3(2024, 5, 16);
    _pstu3 = new Book("计算机网络", _data3, false, 98);
    this->Book_Array->push_back(_pstu3);

    Book* _pstu4 = NULL;
    Date _data4(2023, 10, 4);
    _pstu4 = new Book("离散数学", _data1, true, 11);
    this->Book_Array->push_back(_pstu4);

    Book* _pstu5 = NULL;
    Date _data5(2023, 2, 16);
    _pstu5 = new Book("操作系统", _data5, false, 110);
    this->Book_Array->push_back(_pstu5);

    Book* _pstu6 = NULL;
    Date _data6(2023, 10, 1);
    _pstu6 = new Book("工科数学分析", _data6, false, 111);
    this->Book_Array->push_back(_pstu6);
}
void MangerBook::ShowMenu()
{
    cout << "-----------------------------------------------------------" << endl;
    cout << "-------------------某某大学图书管理系统---------------------" << endl;
    cout << "----------------------0、退出系统--------------------------" << endl;
    cout << "---------------------1、借出排行榜-------------------------" << endl;
    cout << "---------------------2、新增图书---------------------------" << endl;
    cout << "---------------------3、查看图书---------------------------" << endl;
    cout << "---------------------4、删除图书---------------------------" << endl;
    cout << "---------------------5、借出图书---------------------------" << endl;
    cout << "---------------------6、归还图书---------------------------" << endl;
    cout << "---------------------7、显示书库---------------------------" << endl;
    cout << "-----------------------------------------------------------" << endl;
    cout << endl;
}

void MangerBook::Exit_Sys()//退出系统函数
{
    cout << "谢谢使用" << endl;
    exit(-1);
}


bool cmp(Book* book1, Book* book2)//设置排列顺序从大到小
{
    return book1->getTimes() > book2->getTimes();
}

void MangerBook::LoanRanking()//借出排行，使用STL，从大到小排列
{
    sort(Book_Array->begin(), Book_Array->end(), cmp);
    for (int i = 0; i < (int)Book_Array->size(); i++) {
        this->Book_Array->at(i)->ShowInfo();
    }
    system("pause");
    system("cls");
}

void MangerBook::ShowBook()//显示在库图书信息
{
    for (int i = 0; i < (int)Book_Array->size(); i++) {
        this->Book_Array->at(i)->ShowInfo();
    }
    system("pause");
    system("cls");
}

void MangerBook::AddBook()//添加书籍
{
    int i = 1;//记录添加
    while (true)
    {
        char flag;
        string _name;
        cout << "请输入添加第" << i << "本书的名字" << endl;
        cin >> _name;
        Book* _pstu = NULL;
        Date _data(0, 0, 0);
        _pstu = new Book(_name, _data, false, 0);//新入库图书默认借出次数为零
        this->Book_Array->push_back(_pstu);
        i++;
        cout << "是否继续录入信息？" << endl;
        cout << "Y/y继续录入，N/n结束录入" << endl;
        while (true) {    //非法检测
            cin >> flag;
            if (flag == 'Y' || flag == 'y' || flag == 'N' || flag == 'n')
            {
                break;
            }
            else {
                cout << "输入的指令非法！请重新输入！" << endl;
            }
        }
        if (flag == 'Y' || flag == 'y') {
            continue;
        }
        else {
            break;
        }
    }
    cout << "成功录入了" << i - 1 << "本书信息！" << endl;
    system("pause");
    system("cls");
}

void MangerBook::SearchBook()
{
    cout << "请输入待查询书籍名称" << endl;
    string searchname;
    cin >> searchname;
    int index;
    index = IndexBook(searchname);//寻找在数组中位置
    if (index != -1) {
        this->Book_Array->at(index)->ShowInfo();
    }
    system("pause");
    system("cls");
}

int MangerBook::IndexBook(string name)//索引函数
{
    int ret = -1;
    for (int i = 0; i < (int)Book_Array->size(); i++) {
        if (this->Book_Array->at(i)->getName() == name) {
            ret = i;
            break;
        }
    }
    return ret;
}

void MangerBook::SelectBook()
{
    cout << "请输入待删除书籍名称" << endl;
    string searchname;
    cin >> searchname;
    int index;
    index = IndexBook(searchname);
    if (index != -1) {
        if (this->Book_Array->at(index)->getStatue() == false) {//书籍不在库则无法删除
            this->Book_Array->erase(this->Book_Array->begin() + index);
            cout << "删除成功！" << endl;
        }
        else {
            cout << "书籍不在库！，删除失败！" << endl;
        }
    }
    else {
        cout << "书籍信息不存在！，删除失败！" << endl;
    }
    system("pause");
    system("cls");
}

void MangerBook::LoanBook()//借出
{
    cout << "请输入书籍名称" << endl;
    string searchname;
    cin >> searchname;
    int c_year, c_month, c_day;
    int index;
    index = IndexBook(searchname);
    if (index != -1) {
        if (this->Book_Array->at(index)->getStatue() == false) {//书籍不在库则无法借出
            cout << "请输入借出日期（年 月 日）" << endl;
            cin >> c_year >> c_month >> c_day;
            Date c_data(c_year, c_month, c_day);

            // 检查还书日期的合法性
            if (!LegalDate(c_data)) {
                cout << "日期非法，请重新输入！" << endl;
                // 添加循环以重复要求有效日期
                while (true) {
                    cout << "请输入借出日期（年 月 日）" << endl;
                    cin >> c_year >> c_month >> c_day;
                    c_data = Date(c_year, c_month, c_day);
                    if (LegalDate(c_data)) {
                        break;
                    }
                    else {
                        cout << "日期非法，请重新输入！" << endl;
                    }
                }
            }

            Book* _pstu1 = NULL;
            Date _data1(c_year, c_month, c_day);
            _pstu1 = new Book(searchname, _data1, true, this->Book_Array->at(index)->getTimes() + 1);
            int insertIndex = index; // 要插入的位置（可以根据需求修改）
            if (insertIndex >= 0 && insertIndex < (int)this->Book_Array->size()) {
                delete this->Book_Array->at(insertIndex); // 删除原来的对象，避免内存泄漏
                this->Book_Array->at(insertIndex) = _pstu1; // 插入新的 Book 对象
            }
            else {
                cout << "插入位置无效！" << endl;
            }
            cout << "借出成功，请妥善保管" << endl;
        }
        else {
            cout << "书籍不在库！，借出失败！" << endl;
        }
    }
    else {
        cout << "书籍信息不存在！，借出失败！" << endl;
    }
    system("pause");
    system("cls");
}

bool isLeapyear(int year)//判断是否是闰年
{
    if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0))
        return true;
    return false;
}

bool MangerBook::LegalDate(const Date& date) //检测日期合法性
{
    int y = date.getYear();
    int m = date.getMonth();
    int d = date.getDay();
    bool ret = true;
    if (m > 12 || m < 1)
        ret = false;
    else if (((m == 1) || (m == 3) || (m == 5) || (m == 7) || (m == 8) || (m == 10) || (m == 12)) && d > 31)
        ret = false;
    else if (((m == 4) || (m == 6) || (m == 9) || (m == 11)) && d > 30)
        ret = false;
    if (isLeapyear(y) && m == 2 && d > 29)
        ret = false;
    else if (!isLeapyear(y) && m == 2 && d > 28)
        ret = false;
    return ret;
}

int diffDay(int year1, int year2, int month2, int day2)//计算相差多少年转化为天，即总天数差
{
    int ans = 0;
    if (year1 == year2)
        return 0;
    else if (year1 > year2)
        return -1e6;
    int cntyear = abs(year2 - year1);
    for (int i = 0; i < cntyear; i++) {
        ans += 365;
    }
    for (int i = min(year1, year2); i <= max(year1, year2); i++) {
        if (isLeapyear(i)) {
            ans++;
        }
    }
    if (isLeapyear(year2) && ((month2 < 2) || (month2 == 2 && day2 < 29)))
        ans--;
    return ans;
}

int Daytoend(int y, int m, int d) //计算到年底的天数
{
    int tm = 0, tEY = 0;
    int month[12] = { 31,28,31,30,31,30,31,31,30,31,30,31 };
    if (isLeapyear(y))
        month[1] = 29;
    for (m -= 1; m <= 11; m++)
        tm += month[m];
    tEY = tm - d;
    return tEY;
}

int MangerBook::CntDay(const Date& date1, const Date& date2)//计算相差多少天
{
    int cntday1 = diffDay(date1.getYear(), date2.getYear(), date2.getMonth(), date2.getDay());
    int cnt_day_end1 = Daytoend(date1.getYear(), date1.getMonth(), date1.getDay());
    int cnt_day_end2 = Daytoend(date2.getYear(), date2.getMonth(), date2.getDay());
    int CalculateDateDifference = cntday1 + cnt_day_end1 - cnt_day_end2;
    //用总天数差加上两个日期到当年年底天数之差即为结果
    return CalculateDateDifference;
}

void MangerBook::ReturnkBook()//归还书籍
{
    cout << "请输入归还书籍名称" << endl;
    string searchname;
    cin >> searchname;
    int r_year;
    int r_month;
    int r_day;
    int index;
    index = IndexBook(searchname);
    if (index != -1) {
        if (this->Book_Array->at(index)->getStatue() == true) {
            cout << "请输入归还日期（年 月 日）" << endl;
            cin >> r_year >> r_month >> r_day;
            Date r_data(r_year, r_month, r_day);

            // 检查还书日期的合法性
            if (!LegalDate(r_data)) {
                cout << "日期非法，请重新输入！" << endl;
                // 添加循环以重复要求有效日期
                while (true) {
                    cout << "请输入归还日期（年 月 日）" << endl;
                    cin >> r_year >> r_month >> r_day;
                    r_data = Date(r_year, r_month, r_day);
                    if (LegalDate(r_data)) {
                        break;
                    }
                    else {
                        cout << "日期非法，请重新输入！" << endl;
                    }
                }
            }

            // 计算租借天数
            int chargeDay = CntDay(this->Book_Array->at(index)->getDate(), r_data);
            while (chargeDay < 0) {
                cout << "日期非法，请重新输入！" << endl;
                cout << "请输入归还日期（年 月 日）" << endl;
                cin >> r_year >> r_month >> r_day;
                r_data = Date(r_year, r_month, r_day);
                chargeDay = CntDay(this->Book_Array->at(index)->getDate(), r_data);
            }
            //
            this->Book_Array->at(index)->outTurnin();
            double charge = chargeDay * 0.1;
            this->Book_Array->at(index)->Show_LoanTime();
            cout << "借出" << chargeDay << "天，日租1角" << "共需支付" << charge << "元" << endl;
            cout << "归还成功，谢谢使用！" << endl;
        }
        else {
            cout << "已归还，请勿重复归还！" << endl;
        }
    }
    else {
        cout << "书籍信息不存在！，归还失败！" << endl;
    }
    system("pause");
    system("cls");
}

MangerBook::~MangerBook()//析构函数
{
    //dtor
    if (this->Book_Array) {
        this->Book_Array->clear();
        delete[] this->Book_Array;
        this->Book_Array = NULL;//删除后，让对象指针指向空
    }
}