--	emergency.lua
--	Part of FusionPBX
--	Copyright (C) 2010 - 2022 Mark J Crane <markjcrane@fusionpbx.com>
--	All rights reserved.
--
--	Redistribution and use in source and binary forms, with or without
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--Description:
	--purpose: send an email queue or email for 911 calls
	--freeswitch.email(to, from, headers, body, file, convert_cmd, convert_ext)
		--to (mandatory) a valid email address
		--from (mandatory) a valid email address
		--headers (mandatory) for example "subject: you've got mail!\n"
		--body (optional) your regular mail body
		--file (optional) a file to attach to your mail
		--convert_cmd (optional) convert file to a different format before sending
		--convert_ext (optional) to replace the file's extension

--Example
--luarun emergency.lua to@domain.com from@domain.com 'headers' 'subject' 'body'

--load libraries
local send_mail = require 'resources.functions.send_mail'
local Database = require "resources.functions.database"
local Settings = require "resources.functions.lazy_settings"
local Utils = require "resources.functions.channel_utils";

--define a function to send email
local db = dbh or Database.new('system')
local settings = Settings.new(db, domain_name, domain_uuid)
local email_queue_enabled = settings:get('email_queue', 'enabled', 'boolean') or "false";

--get the argv values
script_name = argv[0];
delete = argv[1];

--prepare the api object
api = freeswitch.API();

--get sessions info
if (session and session:ready()) then
	domain_uuid = session:getVariable("domain_uuid");
	domain_name = session:getVariable("domain_name");
	call_uuid = session:getVariable("uuid");
	headers = {
		["X-FusionPBX-Domain-UUID"] = domain_uuid;
		["X-FusionPBX-Domain-Name"] = domain_name;
		["X-FusionPBX-Email-Type"]	= 'app';
		["X-FusionPBX-Call-UUID"]	= call_uuid;
	}
else
	headers = {}
end

function escape_csv(s)
	if string.find(s, '[,"]') then
		s = '"' .. string.gsub(s, '"', '""') .. '"'
	end
	return s
end

function to_csv(tt)
	local s = ""
	for _,p in ipairs(tt) do
		s = s .. "," .. escape_csv(p)
	end
	return string.sub(s, 2)
end

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

--get the templates
local sql = "SELECT * FROM v_email_templates ";
	sql = sql .. "WHERE template_category = :category ";
	sql = sql .. "AND template_subcategory = :subcategory ";
	sql = sql .. "AND template_enabled = :status ";
	local params = {category = 'plugins', subcategory = 'emergency', status = 'true'}
	dbh:query(sql, params, function(row)
		subject = row.template_subject;
		body = row.template_body;
		language = row.template_language;
	end);
	if (debug["sql"]) then
		freeswitch.consoleLog("info", "[emergency] SQL: " .. sql .. "\n");
	end
	--freeswitch.consoleLog("info", "[template] SQL: " .. sql .. "body: " .. body ..  "\n");

--get email from
local sql = "SELECT * FROM v_default_settings ";
	sql = sql .. "WHERE default_setting_category = 'email' ";
	sql = sql .. "AND (default_setting_subcategory = 'smtp_from' ";
	sql = sql .. "OR default_setting_subcategory = 'smtp_from_name') ";
	if (debug["sql"]) then
		freeswitch.consoleLog("notice", "[emergency] SQL: " .. sql .. "\n");
	end
	dbh:query(sql, function(row)
		if (row.default_setting_subcategory == "smtp_from") then
			from = row.default_setting_value;
		end
		if (row.default_setting_subcategory == "smtp_from_name") then
			from_name = row.default_setting_value;
		end
	end);

--get variables
if (session and session:ready()) then
	domain_uuid = session:getVariable("domain_uuid");
	caller_id_name = session:getVariable("caller_id_name");
	caller_id_number = session:getVariable("caller_id_number");
	sip_from_user = session:getVariable("sip_from_user");
	emergency_caller_id_name = session:getVariable("emergency_caller_id_name");
	emergency_caller_id_number = session:getVariable("emergency_caller_id_number");
	call_duration = session:getVariable("call_duration");
	destination_number = session:getVariable("destination_number");
end

--domain level check
result = {}
local sql = "SELECT count(domain_setting_value) ";
sql = sql .. "AS total ";
sql = sql .. "FROM v_domain_settings ";
sql = sql .. "WHERE domain_uuid = :domain_uuid ";
sql = sql .. "AND domain_setting_category = :category ";
sql = sql .. "AND domain_setting_subcategory = :email_address ";
sql = sql .. "AND domain_setting_enabled = :status ";

local params = {domain_uuid = domain_uuid, category = 'emergency', email_address = 'email_address', status = 't'}

dbh:query(sql, params, function(result)
	total = result.total;
	--no emergency emails found under domain, using default
	if (total == 0 or total == nil) then
		to = {}
		local sql = "SELECT default_setting_value ";
			sql = sql .. "FROM v_default_settings ";
 			sql = sql .. "WHERE default_setting_category = :category ";
			sql = sql .. "AND default_setting_subcategory = :email_address ";
			sql = sql .. "AND default_setting_enabled = :status ";
			sql = sql .. "LIMIT 5 ";
		local params = {category = 'emergency', email_address = 'email_address', status = 't'}
		dbh:query(sql, params, function(result)
			for key,row in pairs(result) do
				table.insert(to, row);
				freeswitch.consoleLog("info", "[emergency] Inserted into table from default settings " .. row .. "\n");
			end
			--add some details
			if (debug["sql"]) then
				freeswitch.consoleLog("notice", "[emergency] SQL: " .. sql .. " result " .. result .. "\n");
			end
		end);
	--domain level emails max 5
	else if (tonumber(total) <= 5) then
		to = {}
		local   sql = "SELECT domain_setting_value ";
			sql = sql .. "FROM v_domain_settings ";
			sql = sql .. "WHERE domain_uuid = :domain_uuid ";
			sql = sql .. "AND domain_setting_category = :category ";
			sql = sql .. "AND domain_setting_subcategory = :email_address ";
			sql = sql .. "AND domain_setting_enabled = :status ";
		local params = {domain_uuid = domain_uuid, category = 'emergency', email_address = 'email_address', status = 't'}
		dbh:query(sql, params, function(result)
			for key,row in pairs(result) do
				table.insert(to, row);
				freeswitch.consoleLog("info", "[template] Inserted into table " .. row .. "\n");
			end
		end);
		end
	end

end);

--set event
if (tonumber(destination_number) == 933) then
	event = '933 Emergency Address Validation Service';
else if (tonumber(destination_number) == 911) then
	event = '911 Emergency Call';
	end
end

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

--set the call date
sql = "SELECT now() as call_date ";
if (debug["sql"]) then
	freeswitch.consoleLog("NOTICE", "[event] "..sql.."\n");
end
local t = dbh:first_row(sql);
call_date = t.call_date;

--send the email
if (#to > 0) then
	--prepare the body
	if (body ~= nil) then
		body = body:gsub("${caller_id_name}", caller_id_name);
		body = body:gsub("${caller_id_number}", caller_id_number);
		body = body:gsub("${emergency_caller_id_name}", emergency_caller_id_name);
		body = body:gsub("${emergency_caller_id_number}", emergency_caller_id_number);
		body = body:gsub("${sip_from_user}", sip_from_user);
		body = body:gsub("${caller_id_number}", caller_id_number);
		body = body:gsub("${message_date}", call_date);
		body = body:gsub("${event}", event);
		body = trim(body);
	end

	for key,row in ipairs(to) do
		freeswitch.consoleLog("info", "[emergency] Sending to row " .. row .. " key " .. key ..  "\n");
		--send the email
		send_mail(headers,
			from,
			row,
			{subject, body}
		);
	end
end

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

--insert into emergency logs
local sql = "INSERT INTO v_emergency_logs ( ";
sql = sql .. "  emergency_log_uuid, ";
sql = sql .. "  domain_uuid, ";
sql = sql .. "  insert_date, ";
sql = sql .. "  extension, ";
sql = sql .. "  event ";
sql = sql .. ") ";
sql = sql .. "VALUES ( ";
sql = sql .. "  :emergency_log_uuid, ";
sql = sql .. "  :domain_uuid, ";
sql = sql .. "  now(), ";
sql = sql .. "  :extension, ";
sql = sql .. "  :event ";
sql = sql .. ") ";

local params = {emergency_log_uuid = call_uuid, domain_uuid = domain_uuid, extension = caller_id_number, event = event}

if (debug["sql"]) then
	freeswitch.consoleLog("info", "[emergency] SQL: " .. sql .. "\n");
end

dbh:query(sql, params);
dbh:release();