/*
 * CSB Furien Mod
 * Copyright (C) 2026 counter-strike-boost.com
 *
 * A Furien mod core. Furiens (Terrorists) get a knife only, high speed, low
 * gravity, multi-jump and partial invisibility; Anti-Furiens (CTs) keep full
 * weapons and a flashlight. Every attribute is a cvar, loadouts are applied on
 * spawn, multi-jump is handled in PlayerPreThink, and a HUD shows how many of
 * each side are still alive.
 *
 * Inspired by Furien Mod by Askhanar. Independent GPL re-implementation.
 *
 * 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. It 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 <https://www.gnu.org/licenses/> for details.
 */

#include <amxmodx>
#include <fakemeta>
#include <hamsandwich>
#include <fun>

new const PLUGIN[] = "CSB Furien Mod"
new const VERSION[] = "1.0.0"
new const AUTHOR[]  = "counter-strike-boost.com"

new g_pEnabled, g_pSpeed, g_pGravity, g_pMaxJumps, g_pInvis, g_pHealth

new g_iJumps[33]
new bool:g_bDidJump[33]
new g_iHudSync

public plugin_init()
{
    register_plugin(PLUGIN, VERSION, AUTHOR)

    g_pEnabled  = register_cvar("csb_furien_enabled", "1")
    g_pSpeed    = register_cvar("csb_furien_speed", "320.0")
    g_pGravity  = register_cvar("csb_furien_gravity", "0.5")
    g_pMaxJumps = register_cvar("csb_furien_maxjumps", "2")
    g_pInvis    = register_cvar("csb_furien_invis", "120")
    g_pHealth   = register_cvar("csb_furien_hp", "150")

    RegisterHam(Ham_Spawn, "player", "fwSpawnPost", 1)
    register_forward(FM_PlayerPreThink, "fwPreThink")

    g_iHudSync = CreateHudSyncObj()

    set_task(1.0, "taskHud", 0, _, _, "b")
}

public fwSpawnPost(id)
{
    if (!get_pcvar_num(g_pEnabled) || !is_user_alive(id))
        return

    new team = get_user_team(id)

    if (team == 1)
        applyFurien(id)
    else if (team == 2)
        applyAntiFurien(id)
}

applyFurien(id)
{
    strip_user_weapons(id)
    give_item(id, "weapon_knife")

    set_user_health(id, get_pcvar_num(g_pHealth))
    set_user_maxspeed(id, get_pcvar_float(g_pSpeed))
    set_user_gravity(id, get_pcvar_float(g_pGravity))

    /* partial invisibility */
    new alpha = get_pcvar_num(g_pInvis)
    if (alpha < 0)
        alpha = 0
    else if (alpha > 255)
        alpha = 255

    set_user_rendering(id, kRenderFxNone, 0, 0, 0, kRenderTransAlpha, alpha)

    g_iJumps[id] = 0

    client_print(id, print_chat, "[CSB] You are a Furien: knife, speed, low gravity and multi-jump.")
}

applyAntiFurien(id)
{
    set_user_gravity(id, 1.0)
    set_user_maxspeed(id, 250.0)
    set_user_rendering(id, kRenderFxNone, 0, 0, 0, kRenderNormal, 0)

    /* flashlight ready */
    set_user_footsteps(id, 0)

    client_print(id, print_chat, "[CSB] You are an Anti-Furien: full weapons. Hunt the Furiens.")
}

public fwPreThink(id)
{
    if (!get_pcvar_num(g_pEnabled) || !is_user_alive(id))
        return

    if (get_user_team(id) != 1)
        return

    new flags = pev(id, pev_flags)

    if (flags & FL_ONGROUND)
    {
        g_iJumps[id] = 0
        g_bDidJump[id] = false
        return
    }

    new button = pev(id, pev_button)
    new oldbutton = pev(id, pev_oldbuttons)

    new maxJumps = get_pcvar_num(g_pMaxJumps)

    if ((button & IN_JUMP) && !(oldbutton & IN_JUMP) && g_iJumps[id] < maxJumps)
    {
        static Float:fVel[3]
        pev(id, pev_velocity, fVel)
        fVel[2] = 265.0
        set_pev(id, pev_velocity, fVel)

        g_iJumps[id]++
    }
}

public taskHud()
{
    if (!get_pcvar_num(g_pEnabled))
        return

    new fur = 0, anti = 0
    new players[32], num
    get_players(players, num, "ae")

    for (new i = 0; i < num; i++)
    {
        if (get_user_team(players[i]) == 1)
            fur++
        else if (get_user_team(players[i]) == 2)
            anti++
    }

    set_hudmessage(255, 80, 80, 0.02, 0.06, 0, 0.0, 1.1, 0.0, 0.0, -1)
    ShowSyncHudMsg(0, g_iHudSync, "Furiens: %d   Anti-Furiens: %d", fur, anti)
}