/*
 * CSB Admin Chat
 * Copyright (C) 2026 counter-strike-boost.com
 *
 * Prefixed admin chat channels:
 *   @text    -> private channel, only admins see it
 *   @@text   -> coloured server announcement to everyone
 *   @@@text  -> centred HUD message to everyone
 *
 * Inspired by "Admin Chat Colored" by AlexALX. This is an independent GPL
 * re-implementation written from scratch.
 *
 * 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 Admin Chat"
new const VERSION[] = "1.0.0"
new const AUTHOR[]  = "counter-strike-boost.com"

new g_pEnabled, g_pFlag, g_pPrefix, g_pHudRed, g_pHudGreen, g_pHudBlue, g_pHudHold
new g_msgSayText

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

    g_pEnabled  = register_cvar("csb_achat_enabled", "1")
    g_pFlag     = register_cvar("csb_achat_flag", "d")       /* ADMIN_BAN by default */
    g_pPrefix   = register_cvar("csb_achat_prefix", "ADMIN")
    g_pHudRed   = register_cvar("csb_achat_hud_r", "255")
    g_pHudGreen = register_cvar("csb_achat_hud_g", "160")
    g_pHudBlue  = register_cvar("csb_achat_hud_b", "0")
    g_pHudHold  = register_cvar("csb_achat_hud_hold", "6.0")

    register_clcmd("say", "cmdSay")
    register_clcmd("say_team", "cmdSay")

    g_msgSayText = get_user_msgid("SayText")
}

public cmdSay(id)
{
    if (!get_pcvar_num(g_pEnabled))
        return PLUGIN_CONTINUE

    new said[192]
    read_args(said, charsmax(said))
    remove_quotes(said)
    trim(said)

    if (said[0] != '@')
        return PLUGIN_CONTINUE

    new flagStr[8]
    get_pcvar_string(g_pFlag, flagStr, charsmax(flagStr))

    if (!(get_user_flags(id) & read_flags(flagStr)))
        return PLUGIN_CONTINUE

    new level = 0

    while (level < 3 && said[level] == '@')
        level++

    new text[192]
    copy(text, charsmax(text), said[level])
    trim(text)

    if (!text[0])
    {
        client_print(id, print_chat, "[CSB] Usage: @message (admins) / @@message (all) / @@@message (HUD)")
        return PLUGIN_HANDLED
    }

    new name[32], prefix[24]
    get_user_name(id, name, charsmax(name))
    get_pcvar_string(g_pPrefix, prefix, charsmax(prefix))

    switch (level)
    {
        case 1: sendAdminChat(id, name, prefix, text)
        case 2: sendPublicChat(id, name, prefix, text)
        case 3: sendHudMessage(id, name, prefix, text)
    }

    logIt(id, level, text)
    return PLUGIN_HANDLED
}

sendAdminChat(id, const name[], const prefix[], const text[])
{
    new buf[192], flagStr[8]
    get_pcvar_string(g_pFlag, flagStr, charsmax(flagStr))

    new flags = read_flags(flagStr)
    new alive = is_user_alive(id) ? 0 : 1

    formatex(buf, charsmax(buf), "^x04(%s)%s^x03 %s^x01 : %s", prefix, alive ? "(DEAD)" : "", name, text)

    new players[32], num, pid
    get_players(players, num, "ch")

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

        if (!(get_user_flags(pid) & flags))
            continue

        message_begin(MSG_ONE, g_msgSayText, _, pid)
        write_byte(id)
        write_string(buf)
        message_end()
    }
}

sendPublicChat(id, const name[], const prefix[], const text[])
{
    new buf[192]
    formatex(buf, charsmax(buf), "^x04[%s]^x03 %s^x01 : ^x04%s", prefix, name, text)

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

    for (new i = 0; i < num; i++)
    {
        message_begin(MSG_ONE, g_msgSayText, _, players[i])
        write_byte(id)
        write_string(buf)
        message_end()
    }
}

sendHudMessage(id, const name[], const prefix[], const text[])
{
    new Float:hold = get_pcvar_float(g_pHudHold)

    if (hold < 1.0)
        hold = 1.0

    set_hudmessage(get_pcvar_num(g_pHudRed), get_pcvar_num(g_pHudGreen), get_pcvar_num(g_pHudBlue),
                   -1.0, 0.25, 0, 0.5, hold, 0.1, 0.2, 4)

    show_hudmessage(0, "[%s] %s:^n%s", prefix, name, text)

    /* a HUD message is easy to miss, so mirror it in chat as well */
    new buf[192]
    formatex(buf, charsmax(buf), "^x04[%s]^x03 %s^x01 : ^x04%s", prefix, name, text)

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

    for (new i = 0; i < num; i++)
    {
        message_begin(MSG_ONE, g_msgSayText, _, players[i])
        write_byte(id)
        write_string(buf)
        message_end()
    }
}

logIt(id, level, const text[])
{
    new name[32], authid[35]
    get_user_name(id, name, charsmax(name))
    get_user_authid(id, authid, charsmax(authid))

    new channel[16]

    switch (level)
    {
        case 1: copy(channel, charsmax(channel), "admins")
        case 2: copy(channel, charsmax(channel), "all")
        case 3: copy(channel, charsmax(channel), "hud")
    }

    log_amx("[CSB Admin Chat] %s <%s> (%s): %s", name, authid, channel, text)
}