/*
 * ============================================================================
 *
 *  Zombie:Reloaded
 *
 *  File:          tools_functions.inc
 *  Type:          Core
 *  Description:   API for offsets/signatures exposed in tools.inc
 *
 *  Copyright (C) 2009-2013  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/>.
 *
 * ============================================================================
 */

/**
 * Get or set a client's velocity.
 * @param client        The client index.
 * @param vecVelocity   Array to store vector in, or velocity to set on client.
 * @param retrieve      True to get client's velocity, false to set it.
 * @param stack         If modifying velocity, then true will stack new velocity onto the client's
 *                      current velocity, false will reset it.
 */
stock ToolsClientVelocity(client, Float:vecVelocity[3], bool:apply = true, bool:stack = true)
{
    // If retrieve if true, then get client's velocity.
    if (!apply)
    {
        // x = vector component.
        for (new x = 0; x < 3; x++)
        {
            vecVelocity[x] = GetEntDataFloat(client, g_iToolsVelocity + (x*4));
        }

        // Stop here.
        return;
    }

    // If stack is true, then add client's velocity.
    if (stack)
    {
        // Get client's velocity.
        new Float:vecClientVelocity[3];

        // x = vector component.
        for (new x = 0; x < 3; x++)
        {
            vecClientVelocity[x] = GetEntDataFloat(client, g_iToolsVelocity + (x*4));
        }

        AddVectors(vecClientVelocity, vecVelocity, vecVelocity);
    }

    // Apply velocity on client.
    if(g_hToolsSetAbsVelocity == INVALID_HANDLE) // Fallback to old one
        TeleportEntity(client, NULL_VECTOR, NULL_VECTOR, vecVelocity);
    else // Fixes trigger OnStartTouch/OnEndTouch bug
        SDKCall(g_hToolsSetAbsVelocity, client, vecVelocity);
}

/**
 * Gets client's velocity.
 *
 * @param client        The client index.
 * @param vecVelocity   Array to store vector in.
 */
stock ToolsGetClientVelocity(client, Float:vecVelocity[3])
{
    // x = vector component.
    for (new x = 0; x < 3; x++)
    {
        vecVelocity[x] = GetEntDataFloat(client, g_iToolsVelocity + (x*4));
    }
}

/**
 * Set a client's lagged movement value.
 * @param client    The client index.
 * @param value     LMV value. (300.0 = default, 600.0 = double)
 */
stock ToolsSetClientLMV(client, Float:fLMV)
{
    // Set lagged movement value of client.
    SetEntDataFloat(client, g_iToolsLMV, fLMV / 300.0, true);
}

/**
 * Get nightvision values on a client.
 * @param client    The client index.
 * @param ownership If true, function will return the value of the client's ownership of nightvision.
 *                  If false, function will return the value of the client's on/off state of the nightvision.
 * @return          True if aspect of nightvision is enabled on the client, false if not.
 */
stock bool:ToolsGetClientNightVision(client, bool:ownership = true)
{
    // If ownership is true, then toggle the ownership of nightvision on client.
    if (ownership)
    {
        return bool:GetEntData(client, g_iToolsHasNightVision, 1);
    }

    return bool:GetEntData(client, g_iToolsNightVisionOn, 1);
}

/**
 * Control nightvision values on a client.
 * @param client    The client index.
 * @param enable    Enable or disable an aspect of nightvision. (see ownership parameter)
 * @param ownership If true, enable will toggle the client's ownership of nightvision.
 *                  If false, enable will toggle the client's on/off state of the nightvision.
 */
stock ToolsSetClientNightVision(client, bool:enable, bool:ownership = true)
{
    // If ownership is true, then toggle the ownership of nightvision on client.
    if (ownership)
    {
        SetEntData(client, g_iToolsHasNightVision, enable, 1, true);

        // Stop here.
        return;
    }

    SetEntData(client, g_iToolsNightVisionOn, enable, 1, true);
}

/**
 * Set a client's default field of vision.
 * @param client    The client index.
 * @param FOV       The field of vision of the client.
 */
stock ToolsSetClientDefaultFOV(client, FOV)
{
    SetEntData(client, g_iToolsFOV, FOV, 1, true);
}

/**
 * Get or set a client's score or deaths.
 *
 * @param client    The client index.
 * @param score     True to look at score, false to look at deaths.
 * @param apply     True to set scores or death, false to get.
 * @param value     The value of the client's score or deaths.
 * @return          The score or death count of the client, -1 if setting.
 */
stock ToolsClientScore(client, bool:score = true, bool:apply = true, value = 0)
{
    if (!apply)
    {
        if (score)
        {
            // If score is true, then return client's score.
            return GetEntProp(client, Prop_Data, "m_iFrags");
        }
        // Return client's deaths.
        else
        {
            return GetEntProp(client, Prop_Data, "m_iDeaths");
        }
    }

    // If score is true, then set client's score.
    if (score)
    {
        SetEntProp(client, Prop_Data, "m_iFrags", value);
    }
    // Set client's deaths.
    else
    {
        SetEntProp(client, Prop_Data, "m_iDeaths", value);
    }

    // We set the client's score or deaths.
    return -1;
}

/**
 * Set a client's alpha value.
 *
 * @param client    The client index.
 * @param alpha     The alpha value to set client's alpha to. (0-255)
 * @param weapons   Apply alpha to all client's weapons.
 */
stock ToolsSetClientAlpha(client, alpha)
{
    // Turn rendermode on, on the client.
    SetEntityRenderMode(client, RENDER_TRANSALPHA);

    // Get current client colors.
    new color[4];
    ToolsGetEntityColor(client, color);

    // Set alpha value on the client.
    SetEntityRenderColor(client, color[0], color[1], color[2], alpha);

    // Forward event to modules.
    WeaponAlphaOnClientAlphaChanged(client, alpha);
}

/**
 * Sets an entity's color. (This is the "get" version of SetEntityRenderColor)
 *
 * @param client	The client index.
 * @return          The alpha value of the client. (0-255)
 */
stock ToolsGetEntityAlpha(entity)
{
	static bool:gotconfig = false;
	static String:prop[32];

	if (!gotconfig)
	{
		new Handle:gc = LoadGameConfigFile("core.games");
		new bool:exists = GameConfGetKeyValue(gc, "m_clrRender", prop, sizeof(prop));
		CloseHandle(gc);

		if (!exists)
		{
			strcopy(prop, sizeof(prop), "m_clrRender");
		}

		gotconfig = true;
	}

	new offset = GetEntSendPropOffs(entity, prop);

	return GetEntData(entity, offset + 3, 1);
}

/**
 * Gets an entity's color and alpha.
 *
 * @param client    The client index.
 * @param color     4 dimensional array where [r,g,b,a] values are stored
 */
stock ToolsGetEntityColor(entity, color[4])
{
    static bool:gotconfig = false;
    static String:prop[32];

    if (!gotconfig)
    {
        new Handle:gc = LoadGameConfigFile("core.games");
        new bool:exists = GameConfGetKeyValue(gc, "m_clrRender", prop, sizeof(prop));
        CloseHandle(gc);

        if (!exists)
        {
            strcopy(prop, sizeof(prop), "m_clrRender");
        }

        gotconfig = true;
    }

    new offset = GetEntSendPropOffs(entity, prop);

    for (new i = 0; i < 4; i++)
        color[i] = GetEntData(entity, offset + i, 1);
}