--[[

	SmartLine
	=========
	
	Copyright (C) 2017-2020 Joachim Stolberg

	AGPL v3
	See LICENSE.txt for more information

	timer.lua:
	Derived from Tubelib timer
	
]]--

-- Load support for I18n
local S = smartline.S

local CYCLE_TIME = 8

local sHELP = "label[0,0;"..
S([[SmartLine Timer Help

The Timer is for a daytime controlled sending of commands
e.g. to turn street lights on/off. The timer checks the 
time every few seconds. If the block was just loaded, 
the timer will check the last 4 hours for commands
that still need to be executed.]])..
"]"


local tTime = {
	["00:00"] = 1, ["02:00"] = 2, ["04:00"] = 3, 
	["06:00"] = 4, ["08:00"] = 5, ["10:00"] = 6,
	["12:00"] = 7, ["14:00"] = 8, ["16:00"] = 9, 
	["18:00"] =10, ["20:00"] =11, ["22:00"] =12,
}

local sTime = "00:00,02:00,04:00,06:00,08:00,10:00,12:00,14:00,16:00,18:00,20:00,22:00"

local tAction = {
	[""] = 1,
	["on"] = 2,
	["off"] = 3,
}

local sAction = ",on,off"

local function formspec(events, numbers, actions)
	return "size[8,8]"..
		default.gui_bg..
		default.gui_bg_img..
		default.gui_slots..
			
		"label[0,0;"..S("Time").."]label[2.3,0;"..S("Number(s)").."]label[4.5,0;"..S("Command").."]"..
		"dropdown[0,1;2,1;e1;"..sTime..";"..events[1].."]".. 
		"field[2.3,1.2;2,1;n1;;"..numbers[1].."]" ..
		"dropdown[4.5,1;3,1;a1;"..sAction..";"..tAction[actions[1]].."]".. 
		
		"dropdown[0,2;2,1;e2;"..sTime..";"..events[2].."]".. 
		"field[2.3,2.2;2,1;n2;;"..numbers[2].."]" ..
		"dropdown[4.5,2;3,1;a2;"..sAction..";"..tAction[actions[2]].."]".. 
		
		"dropdown[0,3;2,1;e3;"..sTime..";"..events[3].."]".. 
		"field[2.3,3.2;2,1;n3;;"..numbers[3].."]" ..
		"dropdown[4.5,3;3,1;a3;"..sAction..";"..tAction[actions[3]].."]".. 
		
		"dropdown[0,4;2,1;e4;"..sTime..";"..events[4].."]".. 
		"field[2.3,4.2;2,1;n4;;"..numbers[4].."]" ..
		"dropdown[4.5,4;3,1;a4;"..sAction..";"..tAction[actions[4]].."]".. 
		
		"dropdown[0,5;2,1;e5;"..sTime..";"..events[5].."]".. 
		"field[2.3,5.2;2,1;n5;;"..numbers[5].."]" ..
		"dropdown[4.5,5;3,1;a5;"..sAction..";"..tAction[actions[5]].."]".. 
		
		"dropdown[0,6;2,1;e6;"..sTime..";"..events[6].."]".. 
		"field[2.3,6.2;2,1;n6;;"..numbers[6].."]" ..
		"dropdown[4.5,6;3,1;a6;"..sAction..";"..tAction[actions[6]].."]".. 
		
		"button[4.5,7;1.5,1;help;"..S("help").."]"..
		"button_exit[6.5,7;1.5,1;exit;"..S("close").."]"
end

local function formspec_help()
	return "size[13,10]"..
		default.gui_bg..
		default.gui_bg_img..
		default.gui_slots..
		"field[0,0;0,0;_type_;;"..S("help").."]"..
		sHELP..
		--"label[0.2,0;test]"..
		"button[11.5,9;1.5,1;close;"..S("close").."]"
end

local function check_rules(pos,elapsed)
	if tubelib.data_not_corrupted(pos) then
		local hour = math.floor(minetest.get_timeofday() * 24)
		local meta = minetest.get_meta(pos)
		local events = minetest.deserialize(meta:get_string("events"))
		local numbers = minetest.deserialize(meta:get_string("numbers"))
		local actions = minetest.deserialize(meta:get_string("actions"))
		local done = minetest.deserialize(meta:get_string("done"))
		local placer_name = meta:get_string("placer_name")
		local own_num = meta:get_string("own_num")
		
		-- check all rules
		for idx,act in ipairs(actions) do
			if act ~= "" and numbers[idx] ~= "" then
				local hr = (events[idx] - 1) * 2
				if ((hour - hr) % 24) <= 4 then  -- last 4 hours?
					if done[idx] == false then  -- not already executed?
						tubelib.send_message(numbers[idx], placer_name, nil, act, own_num)
						done[idx] = true
					end
				else
					done[idx] = false
				end
				if hour == hr and done[idx] == false then
					tubelib.send_message(numbers[idx], placer_name, nil, act, own_num)
					done[idx] = true
				end
			end
		end
		
		-- prepare for the next day
		if hour == 23 then
			done = {false,false,false,false,false,false}
		end
		meta:set_string("done",  minetest.serialize(done))
		meta:set_string("infotext", S("SmartLine Timer").." "..own_num..": "..hour..":00")
		return true
	end
	return false
end


minetest.register_node("smartline:timer", {
	description = S("SmartLine Timer"),
	inventory_image = "smartline_timer_inventory.png",
	wield_image = "smartline_timer_inventory.png",
	stack_max = 1,
	tiles = {
		-- up, down, right, left, back, front
		"smartline.png",
		"smartline.png",
		"smartline.png",
		"smartline.png",
		"smartline.png",
		"smartline.png^smartline_timer.png",
	},

	drawtype = "nodebox",
	node_box = {
		type = "fixed",
		fixed = {
			{ -6/32, -6/32, 14/32,  6/32,  6/32, 16/32},
		},
	},
	after_place_node = function(pos, placer)
		local meta = minetest.get_meta(pos)
		local events = {1,1,1,1,1,1}
		local numbers = {"0000","","","","",""}
		local actions = {"","","","","",""}
		local done = {false,false,false,false,false,false}
		local own_num = tubelib.add_node(pos, "smartline:timer")
		meta:set_string("own_num", own_num)
		meta:set_string("placer_name", placer:get_player_name())
		meta:set_string("events",  minetest.serialize(events))
		meta:set_string("numbers", minetest.serialize(numbers))
		meta:set_string("actions", minetest.serialize(actions))
		meta:set_string("done",  minetest.serialize(done))
		meta:set_string("formspec", formspec(events, numbers, actions))
		minetest.get_node_timer(pos):start(CYCLE_TIME)
	end,

	on_receive_fields = function(pos, formname, fields, player)
		local meta = minetest.get_meta(pos)
		if minetest.is_protected(pos, player:get_player_name()) then
			return
		end
		if fields.help ~= nil then
			meta:set_string("formspec", formspec_help())
			return
		end
		local events = minetest.deserialize(meta:get_string("events"))
		for idx, evt in ipairs({fields.e1, fields.e2, fields.e3, fields.e4, fields.e5, fields.e6}) do
			if evt ~= nil then
				events[idx] = tTime[evt]
			end
		end
		meta:set_string("events", minetest.serialize(events))

		local numbers = minetest.deserialize(meta:get_string("numbers"))
		for idx, num in ipairs({fields.n1, fields.n2, fields.n3, fields.n4, fields.n5, fields.n6}) do
			if num ~= nil and tubelib.check_numbers(num)then
				numbers[idx] = num
			end
		end
		meta:set_string("numbers", minetest.serialize(numbers))

		local actions = minetest.deserialize(meta:get_string("actions"))
		for idx, act in ipairs({fields.a1, fields.a2, fields.a3, fields.a4, fields.a5, fields.a6}) do
			if act ~= nil then
				actions[idx] = act
			end
		end
		meta:set_string("actions", minetest.serialize(actions))
	
		meta:set_string("formspec", formspec(events, numbers, actions))
		local done = {false,false,false,false,false,false}
		meta:set_string("done",  minetest.serialize(done))
	end,
	
	on_timer = check_rules,

	after_dig_node = function(pos)
		tubelib.remove_node(pos)
	end,

	paramtype = "light",
	paramtype2 = "facedir",
	sunlight_propagates = true,
	sounds = default.node_sound_stone_defaults(),
	groups = {choppy=2, cracky=2, crumbly=2},
	is_ground_content = false,
})

tubelib.register_node("smartline:timer", {}, {
	on_node_load = function(pos)
		local meta = minetest.get_meta(pos)
		minetest.get_node_timer(pos):start(CYCLE_TIME)
		-- check rules for just loaded areas
		local done = {false,false,false,false,false,false}
		meta:set_string("done",  minetest.serialize(done))
		check_rules(pos,0)
	end,
})


minetest.register_craft({
	output = "smartline:timer",
	recipe = {
		{"",         "", ""},
		{"dye:blue", "default:copper_ingot", "tubelib:wlanchip"},
		{"",         "default:mese_crystal", ""},
	},
})
