#include "T2Archive.h"
#include "T2DateTime.h"
#include "T2TowerDoc.h"
#include "T2WorldPlugin.h"

T2DateTime::T2DateTime() {
	mYear = 0;
	mMonth = 0;
	mRawMinutes = 0;
	mSeconds = 0;
}

T2DateTime::T2DateTime(int year, int month, int hours, int minutes, int seconds) {
	mYear = year;
	mMonth = month;
	mRawMinutes = hours * 60 + minutes;
	mSeconds = seconds;
}

T2DateTime::T2DateTime(T2Archive& archive) {
	unsigned short v;

	archive >> v;
	mYear = v;
	archive >> v;
	mMonth = v;
	archive >> v;
	mRawMinutes = v;
	archive >> v;
	mSeconds = v;
}

/*virtual*/ T2DateTime::~T2DateTime() {
}

int T2DateTime::GetTimeZone() {
	int h = Get24Hour();
	if (h < 2) return 0;
	if (h < 6) return 1;
	if (h < 9) return 2;
	if (h < 10) return 3;
	if (h < 12) return 4;
	if (h < 13) return 5;
	if (h < 15) return 6;
	if (h < 18) return 7;
	if (h < 22) return 8;
	return 9;
}

/*static*/ BOOL T2DateTime::IsEqualDate(T2DateTime* a, T2DateTime* b) {
	return (a->mYear == b->mYear) && (a->mMonth == b->mMonth);
}

/*static*/ BOOL T2DateTime::IsEqualDateTime(T2DateTime* a, T2DateTime* b) {
	return IsEqualDate(a, b) && (a->mRawMinutes == b->mRawMinutes);
}

void T2DateTime::AddMinutes(unsigned int m) {
	mRawMinutes += m;
	Validate();
}

BOOL T2DateTime::IsIncDateTime() {
	BOOL result = false;

	mSeconds++;
	if (mSeconds >= 4) {
		result = true;
		mSeconds = 0;
		mRawMinutes++;
		if (mRawMinutes >= 1440) {
			mMonth++;
			mRawMinutes -= 1440;
		}
		if (mMonth >= 12) {
			mYear++;
			mMonth -= 12;
		}
	}

	return result;
}

void T2DateTime::IncDate() {
	mMonth++;
	if (mMonth >= 12) {
		mYear++;
		mMonth -= 12;
	}
}

unsigned int T2DateTime::CalcLapseDays(unsigned int d) const {
	return CalcTotalDays() - d;
}

unsigned int T2DateTime::CalcLapseYears(unsigned int d) const {
	return (CalcTotalDays() - d) / 12;
}

BOOL T2DateTime::WithinHour(int a, int b) const {
	return WithinMinutes(a * 60, b * 60);
}

BOOL T2DateTime::WithinMinutes(int a, int b) const {
	BOOL isWithin = true;

	int minL = AdjustMinutes(a);
	int minR = AdjustMinutes(b);

	if (minL < minR) {
		if ((mRawMinutes < minL) || (mRawMinutes >= minR))
			isWithin = false;
	} else if (minL > minR) {
		if ((mRawMinutes >= minR) && (mRawMinutes < minL))
			isWithin = false;
	}

	return isWithin;
}

int T2DateTime::AdjustMinutes(int m) const {
	int result = m;
	if (result < 0)
		result += 1440;
	else if (result >= 1440)
		result -= 1440;
	return result;
}

/*virtual*/ void T2DateTime::Write(T2Archive& archive) {
	unsigned short v = mYear;
	archive << v;
	v = mMonth;
	archive << v;
	v = mRawMinutes;
	archive << v;
	v = mSeconds;
	archive << v;
}

BOOL T2DateTime::IsHoliday(T2TowerDoc* doc) {
    T2WorldPlugin *thePlugin = doc->mWorldPlugin;
    return thePlugin->IsHoliday(this);
}

void T2DateTime::Validate() {
	mRawMinutes += (mSeconds / 4);
	mSeconds = mSeconds % 4;

	mMonth += (mRawMinutes / 1440);
	mRawMinutes %= 1440;

	mYear += (mMonth / 12);
	mMonth %= 12;
}