/*
 * CSB Bounty
 * Copyright (C) 2026 counter-strike-boost.com
 *
 * Players (or the server) can place a cash bounty on another player's head.
 * Bounties are stored per SteamID in a Trie, shown in the HUD, announced on
 * placement / increase / claim, and paid to whoever kills the target. An
 * anti-farm cooldown blocks payouts for repeatedly killing the same victim.
 *
 * 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>
#include <cstrike>

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

new Trie:g_tBounty
new g_pEnabled, g_pMin, g_pCooldown

new g_szAuth[33][35]
new Float:g_fLastKill[33][33]
new g_iSync

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

    g_tBounty = TrieCreate()

    g_pEnabled  = register_cvar("csb_bounty_enabled", "1")
    g_pMin      = register_cvar("csb_bounty_min", "500")
    g_pCooldown = register_cvar("csb_bounty_cooldown", "45")

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

    register_concmd("amx_bounty", "cmdAdminBounty", ADMIN_LEVEL_A, "<name> <amount> - place a server bounty")

    register_event("DeathMsg", "eventDeath", "a", "1>0")
    register_logevent("eventRoundStart", 2, "1=Round_Start")

    g_iSync = CreateHudSyncObj()
    set_task(1.0, "taskHud", 0, _, _, "b")
}

public plugin_end()
{
    TrieDestroy(g_tBounty)
}

public client_authorized(id)
{
    get_user_authid(id, g_szAuth[id], charsmax(g_szAuth[]))
}

public client_disconnected(id)
{
    if (g_szAuth[id][0])
        TrieDeleteKey(g_tBounty, g_szAuth[id])

    g_szAuth[id][0] = 0
}

getBounty(id)
{
    if (!g_szAuth[id][0])
        return 0

    new amount
    if (TrieGetCell(g_tBounty, g_szAuth[id], amount))
        return amount

    return 0
}

setBounty(id, amount)
{
    if (!g_szAuth[id][0])
        return

    if (amount <= 0)
        TrieDeleteKey(g_tBounty, g_szAuth[id])
    else
        TrieSetCell(g_tBounty, g_szAuth[id], amount)
}

public cmdSay(id)
{
    new args[128]
    read_args(args, charsmax(args))
    remove_quotes(args)

    if (containi(args, "/bounty") != 0)
        return PLUGIN_CONTINUE

    if (!get_pcvar_num(g_pEnabled))
    {
        client_print(id, print_chat, "[CSB] Bounties are disabled.")
        return PLUGIN_HANDLED
    }

    /* format: /bounty <name> <amount> */
    new rest[96]
    copy(rest, charsmax(rest), args[7])
    trim(rest)

    new targetName[32], amountStr[16]
    strtok(rest, targetName, charsmax(targetName), amountStr, charsmax(amountStr), ' ')
    trim(targetName)
    trim(amountStr)

    if (!targetName[0] || !amountStr[0])
    {
        client_print(id, print_chat, "[CSB] Usage: /bounty <name> <amount>")
        return PLUGIN_HANDLED
    }

    new target = findByName(targetName)

    if (!target)
    {
        client_print(id, print_chat, "[CSB] No player matching '%s'.", targetName)
        return PLUGIN_HANDLED
    }

    if (target == id)
    {
        client_print(id, print_chat, "[CSB] You cannot put a bounty on yourself.")
        return PLUGIN_HANDLED
    }

    new amount = str_to_num(amountStr)
    new minB = get_pcvar_num(g_pMin)

    if (amount < minB)
    {
        client_print(id, print_chat, "[CSB] Minimum bounty is $%d.", minB)
        return PLUGIN_HANDLED
    }

    new money = cs_get_user_money(id)

    if (money < amount)
    {
        client_print(id, print_chat, "[CSB] You only have $%d.", money)
        return PLUGIN_HANDLED
    }

    cs_set_user_money(id, money - amount)

    new was = getBounty(target)
    setBounty(target, was + amount)

    new placer[32], victim[32]
    get_user_name(id, placer, charsmax(placer))
    get_user_name(target, victim, charsmax(victim))

    if (was > 0)
        client_print(0, print_chat, "[CSB] %s raised the bounty on %s to $%d!", placer, victim, was + amount)
    else
        client_print(0, print_chat, "[CSB] %s placed a $%d bounty on %s!", placer, amount, victim)

    return PLUGIN_HANDLED
}

public cmdAdminBounty(id, level, cid)
{
    if (!cmd_access(id, level, cid, 3))
        return PLUGIN_HANDLED

    new arg1[32], arg2[16]
    read_argv(1, arg1, charsmax(arg1))
    read_argv(2, arg2, charsmax(arg2))

    new target = findByName(arg1)

    if (!target)
    {
        console_print(id, "[CSB] No player matching '%s'.", arg1)
        return PLUGIN_HANDLED
    }

    new amount = str_to_num(arg2)

    if (amount <= 0)
    {
        console_print(id, "[CSB] Amount must be positive.")
        return PLUGIN_HANDLED
    }

    new was = getBounty(target)
    setBounty(target, was + amount)

    new victim[32]
    get_user_name(target, victim, charsmax(victim))
    client_print(0, print_chat, "[CSB] The server placed a $%d bounty on %s!", amount, victim)
    return PLUGIN_HANDLED
}

findByName(const name[])
{
    new players[32], num
    get_players(players, num, "ch")

    for (new i = 0; i < num; i++)
    {
        new pn[32]
        get_user_name(players[i], pn, charsmax(pn))

        if (containi(pn, name) != -1)
            return players[i]
    }

    return 0
}

public eventDeath()
{
    new killer = read_data(1)
    new victim = read_data(2)

    if (victim < 1 || victim > 32)
        return

    new reward = getBounty(victim)

    if (reward <= 0)
        return

    if (killer < 1 || killer > 32 || killer == victim)
    {
        /* suicide / world: bounty stays */
        return
    }

    /* anti-farm: same killer killing same victim too soon pays nothing */
    new Float:cd = get_pcvar_float(g_pCooldown)

    if (get_gametime() - g_fLastKill[killer][victim] < cd)
    {
        setBounty(victim, 0)
        return
    }

    g_fLastKill[killer][victim] = get_gametime()

    new money = cs_get_user_money(killer)
    new give = money + reward

    if (give > 16000)
        give = 16000

    cs_set_user_money(killer, give)
    setBounty(victim, 0)

    new kn[32], vn[32]
    get_user_name(killer, kn, charsmax(kn))
    get_user_name(victim, vn, charsmax(vn))

    client_print(0, print_chat, "[CSB] %s claimed the $%d bounty on %s!", kn, reward, vn)
}

public eventRoundStart()
{
    TrieClear(g_tBounty)
}

public taskHud()
{
    new best = 0, bestVal = 0

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

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

        if (b > bestVal)
        {
            bestVal = b
            best = pid
        }
    }

    if (!best)
        return

    new name[32]
    get_user_name(best, name, charsmax(name))

    set_hudmessage(255, 200, 0, 0.02, 0.20, 0, 0.0, 1.1, 0.0, 0.0, -1)
    ShowSyncHudMsg(0, g_iSync, "TOP BOUNTY: %s - $%d", name, bestVal)
}