/*
 * CSB ScoutzKnivez
 * Copyright (C) 2026 counter-strike-boost.com
 *
 * The classic ScoutzKnivez mode. Everyone spawns with a Scout, a knife and
 * unlimited reserve ammo, gravity is lowered for floaty jump-shots, buying is
 * blocked and death triggers an instant respawn. Cvars control the gravity, a
 * one-shot-kill option and an optional headshot-only rule.
 *
 * Inspired by ScoutzKnivez by Freecode. 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 <cstrike>
#include <fun>

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

#define HIT_HEAD 1

new g_pEnabled, g_pGravity, g_pOneShot, g_pHsOnly, g_pRespawn

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

    g_pEnabled = register_cvar("csb_scoutz_enabled", "1")
    g_pGravity = register_cvar("csb_scoutz_gravity", "0.5")
    g_pOneShot = register_cvar("csb_scoutz_oneshot", "1")
    g_pHsOnly  = register_cvar("csb_scoutz_hsonly", "0")
    g_pRespawn = register_cvar("csb_scoutz_respawn", "2.0")

    RegisterHam(Ham_Spawn, "player", "fwSpawnPost", 1)
    RegisterHam(Ham_TakeDamage, "player", "fwTakeDamage", 0)
    RegisterHam(Ham_TraceAttack, "player", "fwTraceAttack", 0)

    register_event("DeathMsg", "eventDeath", "a", "1>0")
    register_event("CurWeapon", "eventCurWeapon", "be", "1=1")

    register_clcmd("buy", "blockBuy")
    register_clcmd("buyammo", "blockBuy")
}

public fwSpawnPost(id)
{
    if (get_pcvar_num(g_pEnabled) && is_user_alive(id))
        set_task(0.2, "taskEquip", id)
}

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

    strip_user_weapons(id)
    give_item(id, "weapon_knife")
    give_item(id, "weapon_scout")

    cs_set_user_bpammo(id, CSW_SCOUT, 90)
    set_user_gravity(id, get_pcvar_float(g_pGravity))
}

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

    new clip, ammo
    new wpn = get_user_weapon(id, clip, ammo)

    /* keep the scout topped up so ammo is effectively unlimited */
    if (wpn == CSW_SCOUT && ammo < 30)
        cs_set_user_bpammo(id, CSW_SCOUT, 90)
}

public fwTakeDamage(victim, inflictor, attacker, Float:damage, damagebits)
{
    if (!get_pcvar_num(g_pEnabled) || !get_pcvar_num(g_pOneShot))
        return HAM_IGNORED

    if (attacker < 1 || attacker > 32 || attacker == victim)
        return HAM_IGNORED

    if (damagebits & (DMG_BULLET | DMG_SLASH | DMG_NEVERGIB))
        SetHamParamFloat(4, 1000.0)

    return HAM_IGNORED
}

public fwTraceAttack(victim, attacker, Float:damage, Float:direction[3], ptr, damagebits)
{
    if (!get_pcvar_num(g_pEnabled) || !get_pcvar_num(g_pHsOnly))
        return HAM_IGNORED

    if (attacker < 1 || attacker > 32 || !is_user_alive(victim))
        return HAM_IGNORED

    if (get_tr2(ptr, TR_iHitgroup) != HIT_HEAD)
    {
        SetHamParamFloat(3, 0.0)
        return HAM_SUPERCEDE
    }

    return HAM_IGNORED
}

public eventDeath()
{
    new victim = read_data(2)

    if (!get_pcvar_num(g_pEnabled) || victim < 1 || victim > 32)
        return

    set_task(get_pcvar_float(g_pRespawn), "taskRespawn", victim)
}

public taskRespawn(id)
{
    if (!is_user_connected(id) || is_user_alive(id))
        return

    if (get_user_team(id) == 1 || get_user_team(id) == 2)
        ExecuteHamB(Ham_CS_RoundRespawn, id)
}

public blockBuy(id)
{
    if (get_pcvar_num(g_pEnabled))
        return PLUGIN_HANDLED

    return PLUGIN_CONTINUE
}