/*
 * CSB Ladder Speed
 * Copyright (C) 2026 counter-strike-boost.com
 *
 * Changes climbing speed on ladders. In PlayerPreThink the plugin detects ladder
 * movement (the engine puts the player into MOVETYPE_FLY while on a ladder) and
 * scales the current velocity by a configurable multiplier, so players climb
 * faster (or slower). An optional "ladder jump" pushes the player off the ladder
 * along their aim when they press jump, useful for surf/KZ style maps.
 *
 * 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>

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

#if !defined MOVETYPE_FLY
    #define MOVETYPE_FLY 5
#endif
#if !defined IN_JUMP
    #define IN_JUMP 2
#endif

new g_pEnabled, g_pMult, g_pLadderJump, g_pJumpPush

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

    g_pEnabled    = register_cvar("csb_ladder_enabled", "1")
    g_pMult       = register_cvar("csb_ladder_mult", "1.6")
    g_pLadderJump = register_cvar("csb_ladder_jump", "1")
    g_pJumpPush   = register_cvar("csb_ladder_push", "300")

    register_forward(FM_PlayerPreThink, "fwPreThink")
}

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

    if (pev(id, pev_movetype) != MOVETYPE_FLY)
        return FMRES_IGNORED

    static Float:fVel[3]
    pev(id, pev_velocity, fVel)

    new btn = pev(id, pev_button)

    if (get_pcvar_num(g_pLadderJump) && (btn & IN_JUMP))
    {
        static Float:fAng[3], Float:fFwd[3]
        pev(id, pev_v_angle, fAng)
        angle_vector(fAng, ANGLEVECTOR_FORWARD, fFwd)

        new Float:push = get_pcvar_float(g_pJumpPush)
        fVel[0] = fFwd[0] * push
        fVel[1] = fFwd[1] * push
        fVel[2] = fFwd[2] * push * 0.5 + 120.0
        set_pev(id, pev_velocity, fVel)
        return FMRES_IGNORED
    }

    new Float:mult = get_pcvar_float(g_pMult)
    if (mult < 0.1)
        mult = 1.0

    fVel[0] *= mult
    fVel[1] *= mult
    fVel[2] *= mult
    set_pev(id, pev_velocity, fVel)

    return FMRES_IGNORED
}