/*
 * CSB Thunderstorm
 * Copyright (C) 2026 counter-strike-boost.com
 *
 * A weather ambience layer. On a periodic schedule (frequency scaled by an
 * intensity cvar) the sky flashes: a brief white ScreenFade plus a bright
 * TE_DLIGHT above the player, followed by a thunder sound. Admins can trigger a
 * flash on demand. Purely cosmetic; nothing about gameplay changes.
 *
 * 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 <amxmisc>

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

#define THUNDER_SOUND "ambience/thunder_clap.wav"

new g_pEnabled, g_pIntensity
new g_iMsgScreenFade

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

    g_pEnabled   = register_cvar("csb_storm_enabled", "1")
    g_pIntensity = register_cvar("csb_storm_intensity", "5")

    g_iMsgScreenFade = get_user_msgid("ScreenFade")

    register_concmd("amx_thunder", "cmdThunder", ADMIN_LEVEL_A, "- trigger a lightning flash now")

    scheduleNext()
}

public plugin_precache()
{
    precache_sound(THUNDER_SOUND)
}

scheduleNext()
{
    new intensity = get_pcvar_num(g_pIntensity)

    if (intensity < 1)
        intensity = 1
    else if (intensity > 10)
        intensity = 10

    new Float:base = 30.0 - float(intensity) * 2.5
    new Float:delay = base + float(random_num(0, 8))

    if (delay < 3.0)
        delay = 3.0

    set_task(delay, "taskStorm", 7788)
}

public taskStorm()
{
    if (get_pcvar_num(g_pEnabled))
        strike()

    scheduleNext()
}

public cmdThunder(id, level, cid)
{
    if (!cmd_access(id, level, cid, 1))
        return PLUGIN_HANDLED

    strike()

    new name[32]
    get_user_name(id, name, charsmax(name))
    client_print(0, print_chat, "[CSB] %s summoned a thunderstrike.", name)
    return PLUGIN_HANDLED
}

strike()
{
    new players[32], num
    get_players(players, num, "c")

    for (new i = 0; i < num; i++)
    {
        new id = players[i]

        /* white flash */
        message_begin(MSG_ONE, g_iMsgScreenFade, _, id)
        write_short(1 << 10)
        write_short(1 << 8)
        write_short(0)
        write_byte(255)
        write_byte(255)
        write_byte(255)
        write_byte(160)
        message_end()

        if (is_user_alive(id))
        {
            new origin[3]
            get_user_origin(id, origin)

            message_begin(MSG_ONE, SVC_TEMPENTITY, _, id)
            write_byte(TE_DLIGHT)
            write_coord(origin[0])
            write_coord(origin[1])
            write_coord(origin[2] + 300)
            write_byte(40)
            write_byte(255)
            write_byte(255)
            write_byte(255)
            write_byte(4)
            write_byte(40)
            message_end()
        }
    }

    set_task(0.6, "taskThunder", 7799)
}

public taskThunder()
{
    new players[32], num
    get_players(players, num, "ch")

    for (new i = 0; i < num; i++)
        client_cmd(players[i], "play %s", THUNDER_SOUND)
}