#include <sourcemod>
#include <sdktools>

#define PLUGIN_NAME "Speed Meter"
#define PLUGIN_VERSION "1.0.1"
#define PLUGIN_DESCRIPTION "Show current player speed in HUD every 2 sec"
#define PLUGIN_AUTHOR "Petit Renard, Anubis"
#define PLUGIN_URL "http://css.cooldev.net/"

new Handle:g_enable = INVALID_HANDLE;
new Handle:g_unit = INVALID_HANDLE;
new Float:lastPosition[MAXPLAYERS + 1][3];
new g_MaxClients;
new Handle:g_timer = INVALID_HANDLE;
new Bool:g_switch = false;

/********************
* Plugin Info
*********************/
public Plugin:myinfo = {
    name = PLUGIN_NAME,
    author = PLUGIN_AUTHOR,
    description = PLUGIN_DESCRIPTION,
    version = PLUGIN_VERSION,
    url = PLUGIN_URL
};

/********************
* Start of Plugin
*********************/
public OnPluginStart (){
    LoadTranslations ("speedmeter.phrases");

    g_enable = CreateConVar ("speedmeter_enable", "1", "Enable SpeedMeter ? (1 = yes, 0 = no)", FCVAR_PLUGIN, true, 0.0, true, 1.0);
    g_unit = CreateConVar ("speedmeter_unit", "0", "Unit of length (0 = kilometres, 1 = miles)", FCVAR_PLUGIN, true, 0.0, true, 1.0);

    CreateConVar ("speedmeter_version", PLUGIN_VERSION, PLUGIN_NAME, FCVAR_PLUGIN | FCVAR_REPLICATED | FCVAR_NOTIFY);
    CreateConVar ("speedmeter_credit", PLUGIN_URL, PLUGIN_NAME, FCVAR_PLUGIN | FCVAR_REPLICATED | FCVAR_NOTIFY);

    RegConsoleCmd("sm_speed", SwitchMeter);

    HookEvent ("round_start", Event_RoundStart);
    HookEvent ("round_end", Event_RoundEnd);
}

/********************
* Start of Map
*********************/
public OnMapStart (){
    g_MaxClients = GetMaxClients();
}

/********************
* Start of Round
*********************/
public Action:Event_RoundStart (Handle:event, const String:name[], bool:dontBroadcast) {
    if (IsPluginEnable ()){
        if (EnabledForPlar ()) {
            if (g_timer != INVALID_HANDLE){
                KillTimer (g_timer);
                g_timer = INVALID_HANDLE;
            }
            g_timer = CreateTimer (1.0, Timer_Speed);
        }
    }
    return Plugin_Continue;
}

/********************
* End of Round
*********************/
public Action:Event_RoundEnd (Handle:event, const String:name[], bool:dontBroadcast) {
    if (g_timer != INVALID_HANDLE) {
        KillTimer (g_timer);
        g_timer = INVALID_HANDLE;
    }
}

/********************
* Speed Timer
*********************/
public Action:Timer_Speed (Handle:timer, any:nothing) {
    for (new i=1; i<=g_MaxClients; i++){
        speedMeter (i);
    }
    g_timer = CreateTimer (1.0, Timer_Speed);
}

/********************
* On/Off for Player
*********************/
public Action:SwitchMeter () {
    if(args < 0 && args > 1) {
        PrintToChat("\x04[SM]:\x03 1 - Включить спидометр; 0 - отключить спидометр");
        return Plugin_Handled;
    } elseif (args == 1) {
        if(EnabledForPlar == true) {
            g_switch = true;
            PrintToChat("\x04[SM]:\x03Вы включили спидометр");
        }
    } elseif (args == 0) {
        g_switch = false;
        PrintToChat("\x04[SM]:\x03Вы выключили спидометр");
    }
}

/********************
* Speed Calculator
*********************/
stock speedMeter (client){
    if (client && IsClientConnected (client) && IsClientInGame (client) && IsPlayerAlive (client)){
        new Float:newPosition[3], Float:distance, Float:speed, String:message[128], unit;

        GetClientAbsOrigin (client, newPosition);
        distance = GetVectorDistance (lastPosition[client], newPosition);
        speed = distance / 20 * 2;
        lastPosition[client] = newPosition;

        unit = GetConVarInt (g_unit);
        switch (unit){
            case 0:{
                message = "Current speed in kilometers";
            }
            case 1:{
                speed = speed / 1.609347;
                message = "Current speed in miles";
            }
        }
        PrintHintText (client, "%t", message, RoundToNearest (speed));
    }
}

/********************
* Check Plugin
*********************/
stock Bool:IsPluginEnable (){
    return Bool:GetConVarBool (g_enable);
}

stock Bool:EnabledForPlar () {
    return Bool:GetConVarBool (g_switch);
}