#include <amxmodx>
#include <fun>

#pragma tabsize 0

new const g_iOperators[][] = { "+", "-", "*" };

#define cTag "^x04[StreetZM]^x01"

const TASK_MATH = 6000;

const TASK_INVALID = 8000;

new bool:g_bMath;
new g_iAnswer;
new g_cAnswer[20];
new g_cQuestion[135];
new g_pCvarPointers[6];
new g_pCvars[6];

public plugin_init()
{
	register_clcmd("say", "Client_Say");
	
	g_pCvarPointers[0] = register_cvar("zp_math_loop_delay", "215");
	g_pCvarPointers[1] = register_cvar("zp_math_max_numbers", "5");
	g_pCvarPointers[2] = register_cvar("zp_math_random_num_a_max", "10");
	g_pCvarPointers[3] = register_cvar("zp_math_random_num_b_max", "43");
	g_pCvarPointers[4] = register_cvar("zp_math_time_to_answer", "15");
	g_pCvarPointers[5] = register_cvar("zp_math_chat_mode", "0");
	
	for (new i = 0; i < sizeof (g_pCvarPointers); i++)
		g_pCvars[i] = get_pcvar_num(g_pCvarPointers[i]);
	
	set_task(float(g_pCvars[0]), "TaskMathProblems", TASK_MATH);
}

public Client_Say(iPlr)
{
	if (g_bMath == true)
	{
		static cAnswer[20];
		read_args(cAnswer, 19);
		remove_quotes(cAnswer);
		
		if (equal(g_cAnswer, cAnswer))
		{
			g_bMath = false;
			
                        new iAmmo, cName[32];
                        
			get_user_name(iPlr, cName, 31);	
			iAmmo = random_num(15, 40);			
                        server_cmd("zp_giveap #%d %d", get_user_userid(iPlr), iAmmo);
                        
			set_dhudmessage(157, 103, 200, 0.02, 0.6, 0, 20.0, 6.0, 0.1, 0.2);
	                show_dhudmessage(0, "*Player %s won: %d packs*", cName, iAmmo);
			client_print_color(0, 0,"%s Player ^x04%s^x01 won ^x04%d^x03 packs^x01.", cTag, cName, iAmmo);
			
                        remove_task(TASK_INVALID);
                        set_task(float(g_pCvars[0]), "TaskMathProblems", TASK_MATH);
		}
		return g_pCvars[5];
	}
	return 0;
}

public TaskMathProblems()
{
	new cOperator[6], cNumbers[6], iNumbers, iRandom, i;
	
	iNumbers = random_num(3, g_pCvars[1]);	
	iRandom = random_num(1, 12);
	
	for (i = 0; i < iNumbers; i++)
		cNumbers[i] = random_num(random_num(1, g_pCvars[2]), random_num(1, g_pCvars[3]));
	
	for (i = 0; i < sizeof (g_iOperators); i++)
		cOperator[i] = random_num(0, sizeof g_iOperators -1);
	
	switch (iRandom)
	{
		case 1, 3, 5, 7, 9:
		{
			new iFirstNumber = random_num(1,iNumbers -1);
			new iSecondNumber = random_num(1,iNumbers -1);
			new iThirdNumber = random_num(1,iNumbers -1);
			new iFirstOperator = random_num(0,sizeof g_iOperators -1);
			new iSecondOperator = random_num(0,sizeof g_iOperators -1);
			
			switch (cOperator[iFirstOperator])
			{
				case 0: g_iAnswer = cNumbers[iSecondNumber] + cNumbers[iFirstNumber];
				case 1: g_iAnswer = cNumbers[iFirstNumber] - cNumbers[iSecondNumber];				
				case 2: g_iAnswer = cNumbers[iSecondNumber] * cNumbers[iFirstNumber];
			}
			
			switch (cOperator[iSecondOperator])
			{
				case 0: g_iAnswer = cNumbers[iThirdNumber] + g_iAnswer;
				case 1: g_iAnswer = g_iAnswer - cNumbers[iThirdNumber];				
				case 2: g_iAnswer = cNumbers[iThirdNumber] * g_iAnswer;
			}
			
			formatex(g_cQuestion, 134, "(%i%c%i)%c%i = ?", cNumbers[iFirstNumber], g_iOperators[cOperator[iFirstOperator]], cNumbers[iSecondNumber], g_iOperators[cOperator[iSecondOperator]], cNumbers[iThirdNumber]);
		}
		
		case 2, 4, 6, 8:
		{
			new iFirstNumber = random_num(1, iNumbers -1);
			new iSecondNumber = random_num(1, iNumbers -1);
			new iOperator = random_num(0, sizeof g_iOperators -1);
			
			switch (cOperator[iOperator])
			{
				case 0:
				{
					g_iAnswer = cNumbers[iSecondNumber] + cNumbers[iFirstNumber];
					formatex(g_cQuestion, 134, "%i+%i = ?", cNumbers[iFirstNumber], cNumbers[iSecondNumber]);
				}
				
				case 1:
				{
					g_iAnswer = cNumbers[iFirstNumber] - cNumbers[iSecondNumber];
					formatex(g_cQuestion, 134, "%i-%i = ?", cNumbers[iFirstNumber], cNumbers[iSecondNumber]);
				}
				
				case 2:
				{
					g_iAnswer = cNumbers[iSecondNumber] * cNumbers[iFirstNumber];
					formatex(g_cQuestion, 134, "%ix%i = ?", cNumbers[iFirstNumber], cNumbers[iSecondNumber]);
				}
			}
		}
		
		case 10, 11, 12:
		{
			new xFirstSolution, xSecondSolution;
			new iFirstNumber = random_num(1,iNumbers -1);
			new iSecondNumber = random_num(1,iNumbers -1);
			new iThirdNumber = random_num(1,iNumbers -1);
			new iFourthNumber = random_num(1,iNumbers -1);
			new iFirstOperator = random_num(0,sizeof g_iOperators -1);
			new iSecondOperator = random_num(0,sizeof g_iOperators -1);
			new iThirdOperator = random_num(0,sizeof g_iOperators -1);
			
			switch (cOperator[iFirstOperator])
			{
				case 0: xFirstSolution = cNumbers[iSecondNumber] + cNumbers[iFirstNumber];
				case 1: xFirstSolution = cNumbers[iFirstNumber] - cNumbers[iSecondNumber];
				case 2: xFirstSolution = cNumbers[iSecondNumber] * cNumbers[iFirstNumber];
			}
			
			switch (cOperator[iThirdOperator])
			{
				case 0: xSecondSolution = cNumbers[iFourthNumber] + cNumbers[iThirdNumber];
				case 1: xSecondSolution = cNumbers[iThirdNumber] - cNumbers[iFourthNumber];
				case 2: xSecondSolution = cNumbers[iFourthNumber] * cNumbers[iThirdNumber];
			}
			
			switch (cOperator[iSecondOperator])
			{
				case 0: g_iAnswer = xSecondSolution + xFirstSolution;
				case 1: g_iAnswer = xFirstSolution - xSecondSolution;
				case 2: g_iAnswer = xSecondSolution * xFirstSolution;
			}
			
			formatex(g_cQuestion, 134, "(%i%c%i)%c(%i%c%i) = ?", cNumbers[iFirstNumber], g_iOperators[cOperator[iFirstOperator]], cNumbers[iSecondNumber], g_iOperators[cOperator[iSecondOperator]], cNumbers[iThirdNumber], g_iOperators[cOperator[iThirdOperator]], cNumbers[iFourthNumber]);
		}
	}
	
	g_bMath = true;
	formatex(g_cAnswer, 19, "%d", g_iAnswer);
	
	set_dhudmessage(157, 103, 200, 0.02, 0.6, 0, 20.0, 6.0, 0.1, 0.2);
	show_dhudmessage(0, "Math Problem: %s", g_cQuestion);
	
	client_print_color(0, 0,"%s ^x03Math Problem^x01:^x04 %s", cTag, g_cQuestion);
	
	set_task(float(g_pCvars[4]), "TaskNoOneAnswered", TASK_INVALID);
}

public TaskNoOneAnswered(iTaskId)
{
	g_bMath = false;
	
        set_dhudmessage(157, 103, 200, 0.02, 0.6, 0, 20.0, 6.0, 0.1, 0.2);
	show_dhudmessage(0, "The answer was: %s", g_cAnswer);
	
	client_print_color(0, 0,"%s No one solved the following ^x03Math Problem^x01: ^x04%s", cTag, g_cQuestion);
	client_print_color(0, 0,"%s The answer was: ^x04%s", cTag, g_cAnswer);
	
        set_task(float(g_pCvars[0]), "TaskMathProblems", TASK_MATH);
}