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/*
This file is a part of the JThread package, which contains some object-
oriented thread wrappers for different thread implementations.

Copyright (c) 2000-2006  Jori Liesenborgs (jori.liesenborgs@gmail.com)

Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
*/

#ifndef THREADING_MUTEX_H
#define THREADING_MUTEX_H

#include "threads.h"

#if USE_CPP11_MUTEX
	#include <mutex>
	using Mutex = std::mutex;
	using RecursiveMutex = std::recursive_mutex;
#else

#if USE_WIN_MUTEX
	#ifndef _WIN32_WINNT
		#define _WIN32_WINNT 0x0501
	#endif
	#ifndef WIN32_LEAN_AND_MEAN
		#define WIN32_LEAN_AND_MEAN
	#endif
	#include <windows.h>
#else
	#include <pthread.h>
#endif

#include "util/basic_macros.h"

class Mutex
{
public:
	Mutex();
	~Mutex();
	void lock();
	void unlock();

protected:
	Mutex(bool recursive);
	void init_mutex(bool recursive);
private:
#if USE_WIN_MUTEX
	CRITICAL_SECTION mutex;
#else
	pthread_mutex_t mutex;
#endif

	DISABLE_CLASS_COPY(Mutex);
};

class RecursiveMutex : public Mutex
{
public:
	RecursiveMutex();

	DISABLE_CLASS_COPY(RecursiveMutex);
};

#endif // C++11

#endif
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--trainhud.lua: holds all the code for train controlling

advtrains.hud = {}
advtrains.hhud = {}

minetest.register_on_leaveplayer(function(player)
advtrains.hud[player:get_player_name()] = nil
advtrains.hhud[player:get_player_name()] = nil
end)

local mletter={[1]="F", [-1]="R", [0]="N"}

function advtrains.on_control_change(pc, train, flip)
   	local maxspeed = train.max_speed or 10
	if pc.sneak then
		if pc.up then
			train.tarvelocity = maxspeed
		end
		if pc.down then
			train.tarvelocity = 0
		end
		if pc.left then
			train.tarvelocity = 4
		end
		if pc.right then
			train.tarvelocity = 8
		end
		--[[if pc.jump then
			train.brake = true
			--0: released, 1: brake and pressed, 2: released and brake, 3: pressed and brake
			if not train.brake_hold_state or train.brake_hold_state==0 then
				train.brake_hold_state = 1
			elseif train.brake_hold_state==2 then
				train.brake_hold_state = 3
			end
		elseif train.brake_hold_state==1 then
			train.brake_hold_state = 2
		elseif train.brake_hold_state==3 then
			train.brake = false
			train.brake_hold_state = 0
		end]]
		--shift+use:see wagons.lua
	else
		local act=false
		if pc.jump then
			train.ctrl_user = 1
			act=true
		end
		-- If atc command set, only "Jump" key can clear command. To prevent accidental control.
		if train.tarvelocity or train.atc_command then
			return
		end
		if pc.up then
		   train.ctrl_user=4
		   act=true
		end
		if pc.down then
			if train.velocity>0 then
				if pc.jump then
					train.ctrl_user = 0
				else
					train.ctrl_user = 2
				end
				act=true
			else
				advtrains.invert_train(train.id)
				advtrains.atc.train_reset_command(train)
			end
		end
		if pc.left then
			if train.door_open ~= 0 then
				train.door_open = 0
			else
				train.door_open = -1
			end
		end
		if pc.right then
			if train.door_open ~= 0 then
				train.door_open = 0
			else
				train.door_open = 1
			end
		end
		if not act then
			train.ctrl_user = nil
		end
	end
end
function advtrains.update_driver_hud(pname, train, flip)
	local inside=train.text_inside or ""
	local ft, ht = advtrains.hud_train_format(train, flip)
	advtrains.set_trainhud(pname, inside.."\n"..ft, ht)
end
function advtrains.clear_driver_hud(pname)
	advtrains.set_trainhud(pname, "")
end

function advtrains.set_trainhud(name, text, driver)
	local hud = advtrains.hud[name]
	local player=minetest.get_player_by_name(name)
	if not player then
	   return
	end
	local driverhud = {
		hud_elem_type = "image",
		name = "ADVTRAINS_DRIVER",
		position = {x=0.5, y=1},
		offset = {x=0,y=-170},
		text = driver or "",
		alignment = {x=0,y=-1},
		scale = {x=1,y=1},}
	if not hud then
		hud = {["driver"]={}}
		advtrains.hud[name] = hud
		hud.id = player:hud_add({
			hud_elem_type = "text",
			name = "ADVTRAINS",
			number = 0xFFFFFF,
			position = {x=0.5, y=1},
			offset = {x=0, y=-300},
			text = text,
			scale = {x=200, y=60},
			alignment = {x=0, y=-1},
		})
		hud.oldText=text
		hud.driver = player:hud_add(driverhud)
	else
		if hud.oldText ~= text then
			player:hud_change(hud.id, "text", text)
			hud.oldText=text
		end
		if hud.driver then
			player:hud_change(hud.driver, "text", driver or "")
		elseif driver then
			hud.driver = player:hud_add(driverhud)
		end
	end
end

function advtrains.set_help_hud(name, text)
	local hud = advtrains.hhud[name]
	local player=minetest.get_player_by_name(name)
	if not player then
	   return
	end
	if not hud then
		hud = {}
		advtrains.hhud[name] = hud
		hud.id = player:hud_add({
			hud_elem_type = "text",
			name = "ADVTRAINS_HELP",
			number = 0xFFFFFF,
			position = {x=1, y=0.3},
			offset = {x=0, y=0},
			text = text,
			scale = {x=200, y=60},
			alignment = {x=1, y=0},
		})
		hud.oldText=text
		return
	elseif hud.oldText ~= text then
		player:hud_change(hud.id, "text", text)
		hud.oldText=text
	end
end

--train.lever:
--Speed control lever in train, for new train control system.
--[[
Value	Disp	Control	Meaning
0		BB		S+Space	Emergency Brake
1		B		Space	Normal Brake
2		-		S		Roll
3		o		<none>	Stay at speed
4		+		W		Accelerate
]]

function advtrains.hud_train_format(train, flip)
	if not train then return "","" end
	local sformat = string.format -- this appears to be faster than (...):format
	
	local max = train.max_speed or 10
	local res = train.speed_restriction
	local vel = advtrains.abs_ceil(train.velocity)
	local vel_kmh=advtrains.abs_ceil(advtrains.ms_to_kmh(train.velocity))
	
	local tlev=train.lever or 1
	if train.velocity==0 and not train.active_control then tlev=1 end
	if train.hud_lzb_effect_tmr then
		tlev=1
	end
	
	local ht = {"[combine:440x110:0,0=(advtrains_hud_bg.png^[resize\\:440x110)"}
	local st = {}
	if train.debug then st = {train.debug} end
	
	-- seven-segment display
	local function sevenseg(digit, x, y, w, h, m)
		--[[
		 -1-
		2   3
		 -4-
		5   6
		 -7-
		]]
		local segs = {
			{h, 0, w, h},
			{0, h, h, w},
			{w+h, h, h, w},
			{h, w+h, w, h},
			{0, w+2*h, h, w},
			{w+h, w+2*h, h, w},
			{h, 2*(w+h), w, h}}
		local trans = {
			[0] = {true, true, true, false, true, true, true},
			[1] = {false, false, true, false, false, true, false},
			[2] = {true, false, true, true, true, false, true},
			[3] = {true, false, true, true, false, true, true},
			[4] = {false, true, true, true, false, true, false},
			[5] = {true, true, false, true, false, true, true},
			[6] = {true, true, false, true, true, true, true},
			[7] = {true, false, true, false, false, true, false},
			[8] = {true, true, true, true, true, true, true},
			[9] = {true, true, true, true, false, true, true}}
		local ent = trans[digit or 10]
		if not ent then return end
		for i = 1, 7, 1 do
			if ent[i] then
				local s = segs[i]
				ht[#ht+1] = sformat("%d,%d=(advtrains_hud_bg.png^[resize\\:%dx%d^%s)",x+s[1], y+s[2], s[3], s[4], m)
			end
		end
	end
	
	-- lever
	ht[#ht+1] = "275,10=(advtrains_hud_bg.png^[colorize\\:cyan^[resize\\:5x18)"
	ht[#ht+1] = "275,28=(advtrains_hud_bg.png^[colorize\\:white^[resize\\:5x18)"
	ht[#ht+1] = "275,46=(advtrains_hud_bg.png^[colorize\\:orange^[resize\\:5x36)"
	ht[#ht+1] = "275,82=(advtrains_hud_bg.png^[colorize\\:red^[resize\\:5x18)"
	ht[#ht+1] = "292,16=(advtrains_hud_bg.png^[colorize\\:darkslategray^[resize\\:6x78)"
	ht[#ht+1] = sformat("280,%s=(advtrains_hud_bg.png^[colorize\\:gray^[resize\\:30x18)",18*(4-tlev)+10)
	-- reverser
	ht[#ht+1] = sformat("245,10=(advtrains_hud_arrow.png^[transformFY%s)", flip and "" or "^[multiply\\:cyan")
	ht[#ht+1] = sformat("245,85=(advtrains_hud_arrow.png%s)", flip and "^[multiply\\:orange" or "")
	ht[#ht+1] = "250,35=(advtrains_hud_bg.png^[colorize\\:darkslategray^[resize\\:5x40)"
	ht[#ht+1] = sformat("240,%s=(advtrains_hud_bg.png^[resize\\:25x15^[colorize\\:gray)", flip and 65 or 30)
	-- train control/safety indication
	if train.tarvelocity or train.atc_command then
		ht[#ht+1] = "10,10=(advtrains_hud_atc.png^[resize\\:30x30^[multiply\\:cyan)"
	end
	if train.hud_lzb_effect_tmr then
		ht[#ht+1] = "50,10=(advtrains_hud_lzb.png^[resize\\:30x30^[multiply\\:red)"
	end
	if train.is_shunt then
		ht[#ht+1] = "90,10=(advtrains_hud_shunt.png^[resize\\:30x30^[multiply\\:orange)"
	end
	-- door
	ht[#ht+1] = "187,10=(advtrains_hud_bg.png^[resize\\:26x30^[colorize\\:white)"
	ht[#ht+1] = "189,12=(advtrains_hud_bg.png^[resize\\:22x11)"
	ht[#ht+1] = sformat("170,10=(advtrains_hud_bg.png^[resize\\:15x30^[colorize\\:%s)", train.door_open==-1 and "white" or "darkslategray")
	ht[#ht+1] = "172,12=(advtrains_hud_bg.png^[resize\\:11x11)"
	ht[#ht+1] = sformat("215,10=(advtrains_hud_bg.png^[resize\\:15x30^[colorize\\:%s)", train.door_open==1 and "white" or "darkslategray")
	ht[#ht+1] = "217,12=(advtrains_hud_bg.png^[resize\\:11x11)"
	-- speed indication(s)
	sevenseg(math.floor(vel/10), 320, 10, 30, 10, "[colorize\\:red\\:255")
	sevenseg(vel%10, 380, 10, 30, 10, "[colorize\\:red\\:255")
	for i = 1, vel, 1 do
		ht[#ht+1] = sformat("%d,65=(advtrains_hud_bg.png^[resize\\:8x20^[colorize\\:white)", i*11-1)
	end
	for i = max+1, 20, 1 do
		ht[#ht+1] = sformat("%d,65=(advtrains_hud_bg.png^[resize\\:8x20^[colorize\\:darkslategray)", i*11-1)
	end
	if res and res > 0 then
		ht[#ht+1] = sformat("%d,60=(advtrains_hud_bg.png^[resize\\:3x30^[colorize\\:red\\:255)", 7+res*11)
	end
	if train.tarvelocity then
		ht[#ht+1] = sformat("%d,85=(advtrains_hud_arrow.png^[multiply\\:cyan^[transformFY^[makealpha\\:#000000)", 1+train.tarvelocity*11)
	end
	local lzb = train.lzb
	if lzb and lzb.checkpoints then
		local oc = lzb.checkpoints
		for i = 1, #oc do
			local spd = oc[i].speed
			local c = not spd and "lime" or (type(spd) == "number" and (spd == 0) and "red" or "orange") or nil
			if c then
				ht[#ht+1] = sformat("130,10=(advtrains_hud_bg.png^[resize\\:30x5^[colorize\\:%s)",c)
				ht[#ht+1] = sformat("130,35=(advtrains_hud_bg.png^[resize\\:30x5^[colorize\\:%s)",c)
				if spd and spd~=0 then
					ht[#ht+1] = sformat("%d,50=(advtrains_hud_arrow.png^[multiply\\:red^[makealpha\\:#000000)", 1+spd*11) 
				end
				local floor = math.floor
				local dist = floor(((oc[i].index or train.index)-train.index))
				dist = math.max(0, math.min(999, dist))
				for j = 1, 3, 1 do
					sevenseg(floor((dist/10^(3-j))%10), 119+j*11, 18, 4, 2, "[colorize\\:"..c)
				end
				break
			end
		end
	end
	
	if res and res == 0 then
		st[#st+1] = attrans("OVERRUN RED SIGNAL! Examine situation and reverse train to move again.")
	end
	
	if train.atc_command then
			st[#st+1] = sformat("ATC: %s%s", train.atc_delay and advtrains.abs_ceil(train.atc_delay).."s " or "", train.atc_command or "")
	end
	
	return table.concat(st,"\n"), table.concat(ht,":")
end

local _, texture = advtrains.hud_train_format { -- dummy train object to demonstrate the train hud
	max_speed = 15, speed_restriction = 15, velocity = 15, tarvelocity = 12,
	active_control = true, lever = 3, ctrl = {lzb = true}, is_shunt = true,
	door_open = 1, lzb = {oncoming = {{spd=6, idx=125.7}}}, index = 0,
}

minetest.register_node("advtrains:hud_demo",{
	description = "Train HUD demonstration",
	tiles = {texture},
	groups = {cracky = 3, not_in_creative_inventory = 1}
})

minetest.register_craft {
	output = "advtrains:hud_demo",
	recipe = {
		{"default:paper", "default:paper", "default:paper"},
		{"default:paper", "advtrains:trackworker", "default:paper"},
		{"default:paper", "default:paper", "default:paper"},
	}
}