--	call_flow.lua
--	Part of FusionPBX
--	Copyright (C) 2010 Mark J Crane <markjcrane@fusionpbx.com>
--	All rights reserved.
--
--	Redistribution and use in source and binary forms, with or without
--	modification, are permitted provided that the following conditions are met:
--
--	1. Redistributions of source code must retain the above copyright notice,
--	   this list of conditions and the following disclaimer.
--
--	2. Redistributions in binary form must reproduce the above copyright
--	   notice, this list of conditions and the following disclaimer in the
--	   documentation and/or other materials provided with the distribution.
--
--	THIS SOFTWARE IS PROVIDED ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
--	INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
--	AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
--	AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
--	OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
--	SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
--	INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
--	CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
--	ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
--	POSSIBILITY OF SUCH DAMAGE.

--set the variables
max_tries = "3";
digit_timeout = "5000";

--include config.lua
require "resources.functions.config";

--create logger object
log = require "resources.functions.log".call_flow

--additional includes
local presence_in = require "resources.functions.presence_in"
local Database    = require "resources.functions.database"
local play_file   = require "resources.functions.play_file"

--include json library
local json
if (debug["sql"]) then
	json = require "resources.functions.lunajson"
end

--connect to the database
local dbh = Database.new('system');

--get the variables
if not session:ready() then return end

local domain_name = session:getVariable("domain_name");
local domain_uuid = session:getVariable("domain_uuid");
local call_flow_uuid = session:getVariable("call_flow_uuid");
local feature_code = session:getVariable("feature_code");

if not call_flow_uuid then
	log.warning('Can not get call flow uuid')
	return
end

--get the call flow details
local sql = "SELECT * FROM v_call_flows where call_flow_uuid = :call_flow_uuid ";
	sql = sql .. "and call_flow_enabled = true "
local params = {call_flow_uuid = call_flow_uuid};
--log.notice("SQL: %s", sql);
dbh:query(sql, params, function(row)
	call_flow_name = row.call_flow_name;
	call_flow_extension = row.call_flow_extension;
	call_flow_feature_code = row.call_flow_feature_code;
	--call_flow_context = row.call_flow_context;
	call_flow_status = row.call_flow_status;
	pin_number = row.call_flow_pin_number;
	call_flow_label = row.call_flow_label;
	call_flow_alternate_label = row.call_flow_alternate_label;
	call_flow_sound = row.call_flow_sound or '';
	call_flow_alternate_sound = row.call_flow_alternate_sound or '';

	if #call_flow_status == 0 then
		call_flow_status = "true";
	end
	if call_flow_status == "true" then
		app = row.call_flow_app;
		data = row.call_flow_data;
	else
		app = row.call_flow_alternate_app;
		data = row.call_flow_alternate_data;
	end
end);

--check to see if the pin number should be required
pin_required = false;
if (feature_code == "true" and #pin_number > 0) then
	pin_required = true;
end
if (#call_flow_feature_code == 0 and #pin_number > 0) then
	pin_required = true;
end

--define the check pin number function
function validate_pin_number(pin_number)
	if (session:ready()) then
		if (#pin_number > 0) then
			max_tries = 3;
			local min_digits = #pin_number;
			local max_digits = #pin_number+1;
			session:answer();
			local digits = session:playAndGetDigits(min_digits, max_digits, max_tries, digit_timeout, "#", "phrase:voicemail_enter_pass:#", "", "\\d+");
			if (digits == pin_number) then
				return true;
			else
				return false;
			end
		end
	end
end

--request the pin number
if (pin_required) then
	valid = validate_pin_number(pin_number);
	if (not valid) then
		valid = validate_pin_number(pin_number);
	end
	if (not valid) then
		valid = validate_pin_number(pin_number);
	end
	if (not valid) then
		session:streamFile("phrase:voicemail_fail_auth:#");
		session:hangup("NORMAL_CLEARING");
		return;
	end
end

--if feature code toggle the status or send to the destination
if (feature_code == "true") then

	--feature code - toggle the status
		local toggle = (call_flow_status == "true") and "false" or "true"

	-- turn the lamp
		presence_in.turn_lamp( toggle == "false",
			call_flow_feature_code.."@"..domain_name,
			call_flow_uuid
		);
		if string.find(call_flow_feature_code, 'flow+', nil, true) ~= 1 then
			presence_in.turn_lamp( toggle == "false",
				'flow+'..call_flow_feature_code.."@"..domain_name,
				call_flow_uuid
			);
		end

	--active label
		local active_flow_label = (toggle == "true") and call_flow_label or call_flow_alternate_label

	--play info message
		local audio_file = (toggle == "true") and call_flow_sound or call_flow_alternate_sound

	--show in the console
		log.noticef("label=%s,status=%s,uuid=%s,audio=%s", active_flow_label, toggle, call_flow_uuid, audio_file)

	--store in database
		dbh:query("UPDATE v_call_flows SET call_flow_status = :toggle WHERE call_flow_uuid = :call_flow_uuid", {
			toggle = toggle, call_flow_uuid = call_flow_uuid
		});

	--answer
		if (session:ready()) then
			session:answer();
		end

	--display label on Phone (if support)
		if (session:ready()) then
			if #active_flow_label > 0 then
				session:sleep(1000);
				local api = freeswitch.API();
				local reply = api:executeString("uuid_display "..session:get_uuid().." "..active_flow_label);
			end
		end

	--play the audio fil or tone
		if (session:ready()) then
			if #audio_file > 0 then
				session:sleep(1000);
				play_file(dbh, domain_name, domain_uuid, audio_file)
				session:sleep(1000);
			else
				session:sleep(2000);
				audio_file = "tone_stream://%(200,0,500,600,700)"
			end
		end

	--hangup the call
		if (session:ready()) then
			session:hangup();
		end
else
	--send to the log
		log.notice("execute " .. app .. " " .. data);

	--execute the application
		if (session:ready()) then
			session:execute(app, data);
		end

	--timeout application
		--if (not session:answered()) then
		--	session:execute(ring_group_timeout_app, ring_group_timeout_data);
		--end
end
