/*
 * ============================================================================
 *
 *   Zombie:Reloaded
 *
 *  File:          zombiereloaded.inc
 *  Type:          Core 
 *  Description:   General plugin functions and defines.
 *
 *  Copyright (C) 2009  Greyscale, Richard Helgeby
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * ============================================================================
 */

/**
 * Index of server console.
 */
#define ZR_CONSOLE_INDEX 0

/**
 * @section Conversion factors.
 */
#define CONVERSION_UNITS_TO_FEET    16.000
#define CONVERSION_FEET_TO_UNITS    0.0625
/**
 * @endsection
 */

/**
 * Global variable set to true when the first zombie(s) is/are spawned.
 */
new bool:g_bZombieSpawned;

/**
 * Function to convert numbers to defined units.
 * 
 * @param number        The number to convert.
 * @param conversion    The conversion factor to multiply by. (See defines above)
 * @return              The converted number.
 */
Float:ZRConvertUnitsFloat(Float:number, Float:conversion)
{
    return number / conversion;
}

/**
 * Create an array populated with eligible clients to be zombie.
 * 
 * @param arrayEligibleClients  The handle of the array, don't forget to call CloseHandle
 *                              on it when finished!
 * @param immunity              True to ignore clients immune from mother infect, false to count them.
 */  
stock ZRCreateEligibleClientList(&Handle:arrayEligibleClients, bool:team = false, bool:alive = false, bool:human = false)
{
    // Create array.
    arrayEligibleClients = CreateArray();
    
    // Populate list with eligible clients.
    // x = client index.
    for (new x = 1; x <= MaxClients; x++)
    {
        // If client isn't in-game, then stop.
        if (!IsClientInGame(x))
        {
            continue;
        }
        
        // If client isn't on a team, then stop.
        if (team && !ZRIsClientOnTeam(x))
        {
            continue;
        }
        
        // If client is dead, then stop.
        if (alive && !IsPlayerAlive(x))
        {
            continue;
        }
        
        // If client is already zombie (via admin), then stop.
        if (human && !InfectIsClientHuman(x))
        {
            continue;
        }
        
        // Add eligible client to array.
        PushArrayCell(arrayEligibleClients, x);
    }
    
    return GetArraySize(arrayEligibleClients);
}

/**
 * Check if a client index is a valid player.
 * 
 * @param client    The client index.
 * @param console   True to include console (index 0), false if not.
 * @return          True if client is valid, false otherwise. 
 */    
stock bool:ZRIsClientValid(client, bool:console = false)
{
    // If index is greater than max number of clients, then return false.
    if (client > MaxClients)
    {
        return false;
    }
    
    // If console is true, return if client is >= 0, if not, then return client > 0.
    return console ? (client >= 0) : (client > 0);
}

/**
 * Check if a given index is console.
 * 
 * @param client    The client index.
 * @param console   True to include console (index 0), false if not.
 * @return          True if client is valid, false otherwise. 
 */    
stock bool:ZRIsConsole(index)
{
    // Return true if index is equal to console's index.
    return (index == ZR_CONSOLE_INDEX);
}

/**
 * Count clients on each team.
 * 
 * @param zombies   This is set to the number of clients that are zombies.
 * @param humans    This is set to the number of clients that are humans.
 * @param alive     If true it will only count live players, false will count alive and dead.
 * @return          True if successful (zombie has spawned), false otherwise.
 */
stock bool:ZRCountValidClients(&zombiecount = 0, &humancount = 0, bool:alive = true, bool:ignorezombiespawned = false)
{
    // If zombie hasn't spawned and were not only counting humans, then stop.
    if (!g_bZombieSpawned && !ignorezombiespawned)
    {
        return false;
    }
    
    // x = client index.
    for (new x = 1; x <= MaxClients; x++)
    {
        // If client isn't in-game, then stop.
        if (!IsClientInGame(x))
        {
            continue;
        }
        
        // If client isn't on a team, then stop.
        if (!ZRIsClientOnTeam(x))
        {
            continue;
        }
        
        // If player must be alive, and player is dead, then stop.
        if (alive && !IsPlayerAlive(x))
        {
            continue;
        }
        
        // If player is a zombie, then increment zombie variable.
        if (InfectIsClientInfected(x))
        {
            zombiecount++;
        }
        // If player is a human, then increment human variable.
        else if (InfectIsClientHuman(x))
        {
            humancount++;
        }
    }
    
    return true;
}

/**
 * Check if a client index is on a team.
 * 
 * @param client    The client index.
 * @param team      Team to check if player is on, -1 to check both. 
 * @return          True if client is on a team, false otherwise. 
 */    
stock bool:ZRIsClientOnTeam(client, team = -1)
{
    // If index is invalid, then stop.
    if (!ZRIsClientValid(client))
    {
        return false;
    }
    
    // Get client team.
    new clientteam = GetClientTeam(client);
    
    if (team == -1)
    {
        return (clientteam == CS_TEAM_T || clientteam == CS_TEAM_CT);
    }
    
    return (clientteam == team);
}

/**
 * Check if there are clients on a team.
 * 
 * @param team      (Optional) Team to check if there are clients on.
 */
stock bool:ZRTeamHasClients(team = -1)
{
    // If team is
    if (team == -1)
    {
        // Return true if both teams have at least 1 client.
        return (GetTeamClientCount(CS_TEAM_T) && GetTeamClientCount(CS_TEAM_CT));
    }
    
    // Return true if given team has at least 1 client.
    return bool:GetTeamClientCount(team);
}

/**
 * Returns whether a player is a generic admin or not.
 *
 * @param client    The client index.
 * @return          True if generic admin, false otherwise.
 */
stock bool:ZRIsClientAdmin(client)
{
    // If index is invalid, then stop.
    if (!ZRIsClientValid(client))
    {
        return false;
    }
    // If client doesn't have the Admin_Generic flag, then stop.
    if (!GetAdminFlag(GetUserAdmin(client), Admin_Generic))
    {
        return false;
    }
    
    // Client is an admin.
    return true;
}

/**
 * Adds support for printing strings longer than 1 KB to console. Max 4 KB.
 *
 * Note: 1024 characters is max for the console, including newline and null
 *       terminator.
 *
 * @param client        The client index.
 * @param text          Long text to write.
 * @param splitsize     Optional. Sets the split size. 1022 is default.
 *                      Allowed range: 128 to 1022.
 */
stock ZRPrintToConsoleLong(client, const String:text[], splitsize = 1022)
{
    // Validate split size.
    if (splitsize < 128 || splitsize > 1022)
    {
        return;
    }
    
    decl String:partbuffer[splitsize];
    new pos;
    new cellswritten = 1;           // Initialize for the loop.

    while (cellswritten)
    {
        cellswritten = strcopy(partbuffer, splitsize, text[pos]);
        (client > 0) ? PrintToConsole(client, partbuffer) : PrintToServer(partbuffer);
        pos += cellswritten;
    }
}