// esef_extras.sma - game-feel extras for cs16-dm-server.
//  - damage numbers: health you took off (blue, right of crosshair) / lost (red, left)
//  - killstreak + multikill announcements (DHUD) with Quake/UT announcer sounds
//  - headshot / knife / first blood sounds
//  - HP on kill (esef_kill_hp, esef_kill_hp_hs), capped at 100
//  - small HUD line: kills, deaths, streak, best streak (esef_hudinfo; hidden while GunGame runs)
// Sounds live in cstrike/sound/misc and are precached, so clients download them once (~800 KB).

#include <amxmodx>
#include <reapi>

#define MULTIKILL_WINDOW 2.0
#define TASK_HUD 4100

new const SND_HEADSHOT[]   = "misc/headshot.wav"
new const SND_FIRSTBLOOD[] = "misc/firstblood.wav"
new const SND_KNIFE[]      = "misc/humiliation.wav"

// multikill chain: 2, 3, 4, 5+ kills inside MULTIKILL_WINDOW
new const SND_MULTI[][] = { "misc/doublekill.wav", "misc/multikill.wav", "misc/ultrakill.wav", "misc/monsterkill.wav" }
new const TXT_MULTI[][] = { "DOUBLE KILL", "MULTI KILL", "ULTRA KILL", "MONSTER KILL" }

// streaks without dying
new const STREAK_AT[] = { 3, 5, 7, 9, 11, 13, 15 }
new const SND_STREAK[][] = {
	"misc/killingspree.wav", "misc/rampage.wav", "misc/dominating.wav", "misc/unstoppable.wav",
	"misc/godlike.wav", "misc/wickedsick.wav", "misc/holyshit.wav"
}
new const TXT_STREAK[][] = {
	"is on a KILLING SPREE", "is on a RAMPAGE", "is DOMINATING", "is UNSTOPPABLE",
	"is GODLIKE", "is WICKED SICK", "HOLY SHIT"
}

new g_streak[MAX_PLAYERS + 1], g_best[MAX_PLAYERS + 1], g_kills[MAX_PLAYERS + 1], g_deaths[MAX_PLAYERS + 1]
new g_chain[MAX_PLAYERS + 1], Float:g_lastKill[MAX_PLAYERS + 1]
new Float:g_preHealth[MAX_PLAYERS + 1]
new bool:g_firstBlood
new g_syncDealt, g_syncTaken, g_syncInfo
new g_pKillHp, g_pKillHpHs, g_pHudInfo, g_pSounds, g_pDamage
new bool:g_gunGame  // GunGame shows its own level/kills HUD, so skip ours

public plugin_precache()
{
	precache_sound(SND_HEADSHOT)
	precache_sound(SND_FIRSTBLOOD)
	precache_sound(SND_KNIFE)
	for (new i = 0; i < sizeof SND_MULTI; i++)
		precache_sound(SND_MULTI[i])
	for (new i = 0; i < sizeof SND_STREAK; i++)
		precache_sound(SND_STREAK[i])
}

public plugin_init()
{
	register_plugin("DM extras", "1.0", "cs16-dm-server")

	g_pKillHp   = register_cvar("esef_kill_hp", "10")
	g_pKillHpHs = register_cvar("esef_kill_hp_hs", "20")
	g_pHudInfo  = register_cvar("esef_hudinfo", "1")
	g_pSounds   = register_cvar("esef_sounds", "1")
	g_pDamage   = register_cvar("esef_damage", "1")

	RegisterHookChain(RG_CBasePlayer_TakeDamage, "TakeDamage_Pre", .post = false)
	RegisterHookChain(RG_CBasePlayer_TakeDamage, "TakeDamage_Post", .post = true)
	RegisterHookChain(RG_CBasePlayer_Killed, "Killed_Post", .post = true)

	g_syncDealt = CreateHudSyncObj()
	g_syncTaken = CreateHudSyncObj()
	g_syncInfo  = CreateHudSyncObj()

	set_task(1.0, "ShowInfoAll", TASK_HUD, .flags = "b")
}

public plugin_cfg()
{
	g_gunGame = (find_plugin_byfile("gungame.amxx") != INVALID_PLUGIN_ID)
}

public client_putinserver(id)
{
	g_streak[id] = g_best[id] = g_kills[id] = g_deaths[id] = g_chain[id] = 0
	g_lastKill[id] = 0.0
}

// --- damage numbers -------------------------------------------------------

public TakeDamage_Pre(victim, inflictor, attacker, Float:damage, damagebits)
{
	g_preHealth[victim] = Float:get_entvar(victim, var_health)
	return HC_CONTINUE
}

public TakeDamage_Post(victim, inflictor, attacker, Float:damage, damagebits)
{
	if (!get_pcvar_num(g_pDamage))
		return HC_CONTINUE

	new Float:now = Float:get_entvar(victim, var_health)
	if (now < 0.0)
		now = 0.0
	new lost = floatround(g_preHealth[victim] - now)
	if (lost <= 0)
		return HC_CONTINUE

	if (is_user_connected(victim) && !is_user_bot(victim))
	{
		set_hudmessage(220, 40, 40, 0.44, 0.52, 0, 0.0, 1.0, 0.0, 0.3, -1)
		ShowSyncHudMsg(victim, g_syncTaken, "%d", lost)
	}
	if (attacker != victim && is_user_connected(attacker) && !is_user_bot(attacker))
	{
		set_hudmessage(40, 160, 255, 0.54, 0.47, 0, 0.0, 1.0, 0.0, 0.3, -1)
		ShowSyncHudMsg(attacker, g_syncDealt, "%d", lost)
	}
	return HC_CONTINUE
}

// --- kills -----------------------------------------------------------------

public Killed_Post(victim, killer, gib)
{
	if (is_user_connected(victim))
	{
		g_deaths[victim]++
		g_streak[victim] = 0
		g_chain[victim] = 0
		ShowInfo(victim)
	}

	if (killer == victim || !is_user_connected(killer))
		return HC_CONTINUE

	g_kills[killer]++
	g_streak[killer]++
	if (g_streak[killer] > g_best[killer])
		g_best[killer] = g_streak[killer]

	new Float:t = get_gametime()
	g_chain[killer] = (t - g_lastKill[killer] <= MULTIKILL_WINDOW) ? g_chain[killer] + 1 : 1
	g_lastKill[killer] = t

	new bool:headshot = bool:get_member(victim, m_bHeadshotKilled)
	new bool:knife = (get_user_weapon(killer) == CSW_KNIFE && get_entvar(victim, var_dmg_inflictor) == killer)

	// HP on kill
	if (is_user_alive(killer))
	{
		new bonus = headshot ? get_pcvar_num(g_pKillHpHs) : get_pcvar_num(g_pKillHp)
		if (bonus > 0)
		{
			new Float:hp = Float:get_entvar(killer, var_health) + float(bonus)
			set_entvar(killer, var_health, hp > 100.0 ? 100.0 : hp)
		}
	}

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

	// pick one sound per kill: streak (everyone) > multikill (killer) > knife (everyone) > headshot (killer) > first blood
	new streakIdx = -1
	for (new i = 0; i < sizeof STREAK_AT; i++)
		if (g_streak[killer] == STREAK_AT[i])
			streakIdx = i

	if (streakIdx >= 0)
	{
		set_dhudmessage(255, 160, 0, -1.0, 0.25, 0, 0.0, 2.5, 0.1, 0.4)
		show_dhudmessage(0, "%s %s! (%d)", name, TXT_STREAK[streakIdx], g_streak[killer])
		PlaySound(0, SND_STREAK[streakIdx])
	}
	else if (g_chain[killer] >= 2)
	{
		new m = g_chain[killer] - 2
		if (m >= sizeof TXT_MULTI)
			m = sizeof TXT_MULTI - 1
		set_dhudmessage(255, 60, 60, -1.0, 0.30, 0, 0.0, 1.5, 0.1, 0.3)
		show_dhudmessage(killer, TXT_MULTI[m])
		PlaySound(killer, SND_MULTI[m])
	}
	else if (knife)
	{
		new vname[32]
		get_user_name(victim, vname, charsmax(vname))
		set_dhudmessage(255, 255, 255, -1.0, 0.25, 0, 0.0, 2.0, 0.1, 0.3)
		show_dhudmessage(0, "%s knifed %s!", name, vname)
		PlaySound(0, SND_KNIFE)
	}
	else if (headshot)
	{
		PlaySound(killer, SND_HEADSHOT)
	}
	else if (!g_firstBlood)
	{
		set_dhudmessage(255, 0, 0, -1.0, 0.25, 0, 0.0, 2.0, 0.1, 0.3)
		show_dhudmessage(0, "%s drew FIRST BLOOD", name)
		PlaySound(0, SND_FIRSTBLOOD)
	}
	g_firstBlood = true

	ShowInfo(killer)
	return HC_CONTINUE
}

PlaySound(id, const snd[])
{
	if (!get_pcvar_num(g_pSounds))
		return
	// spk wants the path without "sound/" and without extension
	new path[64]
	copy(path, charsmax(path), snd)
	replace(path, charsmax(path), ".wav", "")
	client_cmd(id, "spk ^"%s^"", path)
}

// --- HUD info line ----------------------------------------------------------

public ShowInfoAll()
{
	if (g_gunGame || !get_pcvar_num(g_pHudInfo))
		return
	new players[MAX_PLAYERS], num
	get_players(players, num, "ach")  // alive, no bots, no HLTV
	for (new i = 0; i < num; i++)
		ShowInfo(players[i])
}

ShowInfo(id)
{
	if (g_gunGame || !get_pcvar_num(g_pHudInfo) || !is_user_connected(id) || is_user_bot(id))
		return
	set_hudmessage(200, 200, 200, 0.01, 0.88, 0, 0.0, 1.2, 0.0, 0.0, -1)
	ShowSyncHudMsg(id, g_syncInfo, "K %d  D %d  |  streak %d  (best %d)", g_kills[id], g_deaths[id], g_streak[id], g_best[id])
}