#pragma warning(disable:4996)
#include"Exam.h"
using namespace std;

Exam::Exam(Examsave* insave) {
	this->save = *insave;
	studentnum = insave->studentnum;
	strcpy(name, insave->name);
	strcpy(filename, insave->filename);
	ifstream ibin(filename, ios::in, ios::binary);
	Item tmp;
	for (int i = 0; i < studentnum; i++) {
		ibin.read((char*)&tmp, sizeof(Item));
		items.push_back(tmp);
	}
	ibin.close();
	if (items.size() > 0) {
		sort(items.begin(), items.end());
		reverse(items.begin(), items.end());
	}
}
Exam::Exam(char inname[]) {
	strcpy(name, inname);
	studentnum = 0;
	ifstream tmp(inname, ios::in, ios::binary);
	if (tmp.good()) {
		string nname;
		nname += inname;
		for (auto i = 1; i < 100; i++) {
			nname += to_string(i);
			ifstream tmp(nname, ios::in, ios::binary);
			if (!tmp.good()) {
				break;
			}
		}
		strcpy(filename, nname.c_str());
	}
	else {
		strcpy(filename, inname);
	}
}
void Exam::addItem(long long int studentNo, double score[9]) {
	rmvItem(studentNo);
	Item tmp(studentNo, score);
	items.push_back(tmp);
	sort(items.begin(), items.end());
	reverse(items.begin(), items.end());
	studentnum++;
}
void Exam::addItem(const Item& item) {
	rmvItem(item.getStuNo());
	items.push_back(item);
	sort(items.begin(), items.end());
	reverse(items.begin(), items.end());
	studentnum++;
}
void Exam::saveAll(ofstream& examsout) {
	strcpy(save.filename, filename);
	strcpy(save.name, name);
	studentnum = items.size();
	save.studentnum = studentnum;
	ofstream obin(filename, ios::out, ios::binary);
	Item tmp;
	for (auto i = items.begin(); i < items.end(); i++) {
		tmp = *i;
		obin.write((char*)&tmp, sizeof(Item));
	}
	obin.close();
	examsout.write((char*)&this->save, sizeof(Examsave));
}
void Exam::dspHeader() {
	cout << setw(20) << "Ãû³Æ" << setw(15) << "ѧÉúÊý" << endl;
}
void Exam::dsp() const {
	cout << setw(20) << name << setw(15) << studentnum << endl;
}
void Exam::dspName() const {
	cout << name;
}
void Exam::dspName(int w) const {
	cout << setw(w) << name;
}
void Exam::dspItems() const {
	for (auto i = items.begin(); i < items.end(); i++) {
		i->dsp();
		cout << setw(6) << distance(items.begin(), i) + 1 << endl;
	}
}
void Exam::toCsvItems(ofstream& csv) const {
	for (auto i = items.begin(); i < items.end(); i++) {
		i->toCsv(csv);
		csv << distance(items.begin(), i) + 1 << endl;
	}
}
bool Exam::itemExists(long long int studentNo) const {
	for (auto i = items.begin(); i < items.end(); i++) {
		if (i->getStuNo()== studentNo) {
			return true;
		}
	}
	return false;
}
bool Exam::rmvItem(long long int studentNo) {
	for (auto i = items.begin(); i < items.end(); i++) {
		if (i->getStuNo() == studentNo) {
			items.erase(i);
			studentnum--;
			return true;
		}
	}
	return false;
}
void Exam::changeName(char name[]) {
	strcpy(this->name, name);
}
const Item* Exam::StudentInquiry(long long int studentNo) const{
	for (auto item = items.begin(); item < items.end(); item++) {
		if (item->getStuNo() == studentNo) {
			return &(*item);
		}
	}
	return nullptr;
}
int Exam::getStuRanking(const Item& item) {
	for (auto i = items.begin(); i < items.end(); i++) {
		if (i->stuNoEqual(item)) {
			return distance(items.begin(), i) + 1;
		}
	}
	return -1;
}
void Exam::rm() const {
	remove(filename);
}