/*
 * CSB Nextmap Info
 * Copyright (C) 2026 counter-strike-boost.com
 *
 * Shows the next map in a small HUD line and answers /nextmap in chat, reading
 * the value from amx_nextmap. As the map winds down it announces the next map at
 * fixed time thresholds so nobody is surprised by the change, and it re-reads
 * amx_nextmap live in case a map vote replaced it.
 *
 * 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>

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

new g_pEnabled, g_pHud
new g_pNextmap
new g_iSync

/* announce thresholds in seconds of time left */
new const g_iThresholds[] = { 300, 120, 60, 30 }
new bool:g_bAnnounced[sizeof(g_iThresholds)]

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

    g_pEnabled = register_cvar("csb_nextmap_enabled", "1")
    g_pHud     = register_cvar("csb_nextmap_hud", "1")

    g_pNextmap = get_cvar_pointer("amx_nextmap")

    register_clcmd("say /nextmap", "cmdNextmap")
    register_clcmd("say_team /nextmap", "cmdNextmap")
    register_clcmd("say nextmap", "cmdNextmap")

    g_iSync = CreateHudSyncObj()

    set_task(2.0, "taskCheck", 44, _, _, "b")
}

getNextmap(out[], len)
{
    if (g_pNextmap != 0)
    {
        get_pcvar_string(g_pNextmap, out, len)
    }
    else
    {
        get_cvar_string("amx_nextmap", out, len)
    }

    if (!out[0])
        copy(out, len, "unknown")
}

public cmdNextmap(id)
{
    new nm[40]
    getNextmap(nm, charsmax(nm))

    new tl = get_timeleft()

    if (tl > 0)
        client_print(id, print_chat, "[CSB] Next map: %s  (%d:%02d left)", nm, tl / 60, tl % 60)
    else
        client_print(id, print_chat, "[CSB] Next map: %s", nm)

    return PLUGIN_HANDLED
}

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

    new tl = get_timeleft()

    if (get_pcvar_num(g_pHud) && tl > 0)
    {
        new nm[40]
        getNextmap(nm, charsmax(nm))

        set_hudmessage(200, 200, 255, 0.75, 0.92, 0, 0.0, 2.0, 0.0, 0.0, -1)
        ShowSyncHudMsg(0, g_iSync, "Next: %s", nm)
    }

    /* announce at each threshold once */
    for (new i = 0; i < sizeof(g_iThresholds); i++)
    {
        if (!g_bAnnounced[i] && tl > 0 && tl <= g_iThresholds[i])
        {
            g_bAnnounced[i] = true

            new nm[40]
            getNextmap(nm, charsmax(nm))

            client_print(0, print_chat, "[CSB] %d minute(s) left - next map is %s.",
                g_iThresholds[i] / 60 >= 1 ? g_iThresholds[i] / 60 : 1, nm)
        }
    }
}