module ActiveRecord
	class PremissionDenied < RuntimeError
	end
end

class ApplicationController < LinguaFrancaApplicationController
	include ScheduleHelper

	# Prevent CSRF attacks by raising an exception.
	# For APIs, you may want to use :null_session instead.
	protect_from_forgery with: :exception, :except => [:do_confirm, :js_error, :admin_update]

	before_filter :capture_page_info

	@@test_host
	@@test_location

	def capture_page_info
		if request.method == "GET" && (params[:controller] != 'application' || params[:action] != 'contact')
			session[:last_request]
			request_info = {
				'params' => params,
				'request' => {
					'remote_ip'    => request.remote_ip,
					'uuid'         => request.uuid,
					'original_url' => request.original_url,
					'env'          => Hash.new
				}
			}
			request.env.each do | key, value |
				request_info['request']['env'][key.to_s] = value.to_s
			end
			session['request_info'] = request_info
		end
		# set the translator to the current user if we're logged in
		I18n.config.translator = current_user
		I18n.config.callback = self

		# get the current conference and set it globally
		@conference = Conference.order("start_date DESC").first

		# add some style sheets
		@stylesheets ||= Array.new
		# add the translations stylesheet if translating
		@stylesheets << params[:controller] if params[:controller] == 'translations'

		@_inline_scripts ||= []
		@_inline_scripts << Rails.application.assets.find_asset('main.js').to_s

		ActionMailer::Base.default_url_options = {:host => "#{request.protocol}#{request.host_with_port}"}

		if request.post? && params[:action] == 'do_confirm'
			halt_redirection!
		end

		@alt_lang_urls = {}
		I18n.backend.enabled_locales.each do |locale|
			locale = locale.to_s
			@alt_lang_urls[locale] = view_context.url_for_locale(locale) # don't show the current locale
		end

		# give each environment a different icon and theme colour so that we can easily see where we are. See https://css-tricks.com/give-development-domain-different-favicon-production
		@favicon = Rails.env.development? || Rails.env.preview? ? "favicon-#{Rails.env.to_s}.ico" : 'favicon.ico'
		@theme_colour = Rails.env.preview? ? '#EF57B4' : (Rails.env.development? ? '#D89E59' : '#00ADEF')

		# call the base method to detect the language
		super
	end

	def home
		@workshops = Workshop.where(:conference_id => @conference.id)

		if @conference.workshop_schedule_published
			@event_dlg = true
			#view_context.add_inline_script :schedule
			get_scheule_data(false)
			# @events = Event.where(:conference_id => @conference.id)
			# schedule = get_schedule_data
			# @schedule = schedule[:schedule]
			# @locations = Hash.new
			# EventLocation.where(:conference_id => @conference.id).each do |l|
			# 	@locations[l.id.to_s] = l
			# end
			# @day_parts = @conference.day_parts ? JSON.parse(@conference.day_parts) : {:morning => 0, :afternoon => 13, :evening => 18}
		end
	end

	def policy
		@is_policy_page = true
	end

	def robots
		render :text => File.read("config/robots-#{Rails.env.production? ? 'live' : 'dev'}.txt"), :content_type => 'text/plain'
	end

	def humans
		render :text => File.read("config/humans.txt"), :content_type => 'text/plain'
	end

	def self.set_host(host)
		@@test_host = host
	end

	def self.set_location(location)
		@@test_location = location
	end

	def self.get_location()
		@@test_location
	end

	def do_404
		error_404(status: 404)
	end

	def error_404(args = {})
		params[:_original_action] = params[:action]
		params[:action] = 'error-404'
		@page_title = 'page_titles.404.Page_Not_Found'
		@main_title = 'error.404.title'
		render 'application/404', args
	end

	def do_403(template = nil)
		@template = template
		@page_title ||= 'page_titles.403.Access_Denied'
		@main_title ||= @page_title
		params[:_original_action] = params[:action]
		params[:action] = 'error-403'
		render 'application/permission_denied', status: 403
	end

	def error_500(exception = nil)
		@page_title = 'page_titles.500.An_Error_Occurred'
		@main_title = 'error.500.title'
		params[:_original_action] = params[:action]
		params[:action] = 'error-500'
		render 'application/500', status: 500
	end

	def js_error
		# send and email if this is production
		report = "A JavaScript error has occurred on <code>#{params[:location]}</code>"
		if params[:location] == params[:url]
			report += " on line <code>#{params[:lineNumber]}</code>"
		else
			report += " in <code>#{params[:url]}:#{params[:lineNumber]}</code>"
		end

		begin
			# log the error
			logger.info exception.to_s
			logger.info exception.backtrace.join("\n")

			UserMailer.send_mail(:error_report) do 
				[
					"A JavaScript error has occurred",
					report,
					params[:message],
					nil,
					request,
					params,
					current_user,
					Time.now.strftime("%d/%m/%Y %H:%M")
				]
			end if Rails.env.preview? || Rails.env.production?
		rescue exception2
			logger.info exception2.to_s
			logger.info exception2.backtrace.join("\n")
		end
		render json: {}
	end

	rescue_from ActiveRecord::RecordNotFound do |exception|
		do_404
	end

	rescue_from ActiveRecord::PremissionDenied do |exception|
		do_403
	end

	rescue_from AbstractController::ActionNotFound do |exception|
		@banner_image = 'grafitti.jpg'
		
		if current_user
			@page_title = nil#'page_titles.Please_Login'
			do_403 'not_a_translator'
			#return
		else
			@page_title = 'page_titles.403.Please_Login'
			do_403 'translator_login'
		end
	end

	def locale_not_enabled!(locale = nil)
		locale_not_available!(locale)
	end
	
	def locale_not_available!(locale = nil)
		set_default_locale
		params[:_original_action] = params[:action]
		params[:action] = 'error-locale-not-available'
		@page_title = 'page_titles.404.Locale_Not_Available'
		@main_title_vars = { vars: { language: view_context.language_name(locale) } }
		@main_title = 'error.locale_not_available.title'
		render 'application/locale_not_available', status: 404
	end

	rescue_from StandardError do |exception|
		# log the error
		logger.info exception.to_s
		logger.info exception.backtrace.join("\n")

		# send and email if this is production
		suppress(Exception) do
			UserMailer.send_mail(:error_report) do 
				[
					"An error has occurred in #{Rails.env}",
					nil,
					exception.to_s,
					exception.backtrace.join("\n"),
					request,
					params,
					current_user,
					Time.now.strftime("%d/%m/%Y %H:%M")
				]
			end if Rails.env.preview? || Rails.env.production?
		end

		# raise the error if we are in development so that we can debug it
		raise exception if Rails.env.development?

		# show the error page
		error_500 exception
	end

	def generate_confirmation(user, url, expiry = nil)
		if user.is_a? String
			user = User.find_by_email(user)

			# if the user doesn't exist, just show them a 403
			do_403 unless user.present?
		end
		expiry ||= (Time.now + 12.hours)
		session[:confirm_uid] = user.id

		unless user.locale.present?
			user.locale = I18n.locale
			user.save
		end

		# send the confirmation email and make sure it get sent as quickly as possible
		UserMailer.send_mail :email_confirmation do
			EmailConfirmation.create(user_id: user.id, expiry: expiry, url: url)
		end
	end

	def user_settings
		@conferences = Array.new
		if logged_in?
			Conference.all.each do | conference |
				@conferences << conference if conference.host? current_user
			end
		end
		@main_title = @page_title = 'page_titles.user_settings.Your_Account'
	end

	def contact
		@main_title = @page_title = 'page_titles.contact.Contact_Us'
	end

	def contact_send
		email_list = ['Godwin <goodgodwin@hotmail.com>']
		
		if params[:reason] == 'conference'

			@conference.organizations.each do | org |
				org.users.each do | user |
					email_list << user.named_email
				end
			end
		end

		UserMailer.send_mail(:contact) do 
			[
				current_user || params[:email],
				params[:subject],
				params[:message],
				email_list
			]
		end

		request_info = session['request_info'] || { 'request' => request, 'params' => params }
		UserMailer.send_mail(:contact_details) do 
			[
				current_user || params[:email],
				params[:subject],
				params[:message],
				request_info['request'],
				request_info['params']
			]
		end

		redirect_to contact_sent_path
	end

	def contact_sent
		@main_title = @page_title = 'page_titles.contact.Contact_Us'
		@sent = true
		render 'contact'
	end

	def update_user_settings
		return do_403 unless logged_in?
		current_user.firstname = params[:name]
		current_user.lastname = nil
		current_user.languages = params[:languages].keys
		current_user.is_subscribed = params[:email_subscribe].present?
		current_user.save
		redirect_to settings_path
	end

	def do_confirm(settings = nil)
		settings ||= {:template => 'login_confirmation_sent'}
		if params[:email]
			# see if we've already sent the confirmation email and are just confirming
			#  the email address
			if params[:token]
				user = User.find_by_email(params[:email])
				confirm(user)
				return
			end
			user = User.find_by_email(params[:email])

			unless user.present?
				user = User.create(:email => params[:email], locale: I18n.locale)
			end

			# generate the confirmation, send the email and show the 403
			referrer = params[:dest] || (request.present? && request.referer.present? ? request.referer.gsub(/^.*?\/\/.*?\//, '/') : settings_path)
			generate_confirmation(params[:email], referrer)
			template = 'login_confirmation_sent'
			@page_title ||= 'page_titles.403.Please_Check_Email'

			if (request.present? && request.referrer.present? && conference = /^\/conferences\/(\w+)\/register\/?$/.match(request.referrer.gsub(/^https?:\/\/.*?\//, '/')))
				@this_conference = Conference.find_by!(slug: conference[1])
				@banner_image = @this_conference.cover_url
				template = 'conferences/email_confirm'
			end
		end
		
		if request.post?
			@banner_image ||= 'grafitti.jpg'
			@page_title ||= 'page_titles.403.Please_Login'

			do_403 (template || 'translator_login')
		else
			do_404
		end
	end

	def confirm(uid = nil)
		@confirmation = EmailConfirmation.find_by_token(params[:token])

		unless @confirmation.present?
			@token_not_found = true
			return do_404
		end

		confirm_user = nil
		if uid.is_a?(User)
			confirm_user = uid
			uid = confirm_user.id
		end
		# check to see if we were given a user id to confirm against
		#  if we were, make sure it was the same one
		if (uid ||= (params[:uid] || session[:confirm_uid]))
			if uid == @confirmation.user_id
				session[:uid] = nil
				confirm_user ||= User.find uid
				auto_login(confirm_user)
			else
				@confirmation.delete
			end

			redirect_to (@confirmation.url || '/')
			return
		end

		@banner_image = 'grafitti.jpg'
		@page_title = 'page_titles.403.Please_Confirm_Email'
		do_403 'login_confirm'
	end

	def translator_request
		@banner_image = 'grafitti.jpg'
		@page_title = 'page_titles.403.Translator_Request_Sent'
		do_403 'translator_request_sent'
	end

	def user_logout
		logout()
		redirect_to (params[:url] || '/')
	end

	def login_user(u)
		auto_login(u)
	end

    def on_translation_change(object, data, locale, translator_id)
		translator = User.find(translator_id)
		mailer = "#{object.class.table_name.singularize}_translated"

		if object.respond_to?(:get_translators)
			object.get_translators(data, locale).each do |id, user|
				if user.id != current_user.id && user.id != translator_id
					UserMailer.send_mail mailer, user.locale do
						{ :args => [object, data, locale, user, translator] }
					end
				end
			end
		end
	end

	def on_translatable_content_change(object, data)
		mailer = "#{object.class.table_name.singularize}_original_content_changed"
		
		if object.respond_to?(:get_translators)
			object.get_translators(data).each do |id, user|
				if user.id != current_user.id
					UserMailer.send_mail mailer, user.locale do
						{ :args => [object, data, user, current_user] }
					end
				end
			end
		end
	end

	def i18n_exception(str, exception, locale, key)
		# log it
		logger.info "Missing translation found for: #{key}"

		# send and email if this is production
		begin
			UserMailer.send_mail(:error_report) do 
				[
					"A missing translation found in #{Rails.env}",
					"<p>A translation for <code>#{key}</code> in <code>#{locale.to_s}</code> was found. The text that was rendered to the user was:</p><blockquote>#{str || 'nil'}</blockquote>",
					exception.to_s,
					nil,
					request,
					params,
					current_user,
					Time.now.strftime("%d/%m/%Y %H:%M")
				]
			end if Rails.env.preview? || Rails.env.production?
		rescue exception2
			logger.info exception2.to_s
			logger.info exception2.backtrace.join("\n")
		end
	end


	def get_block_data
		conference = @this_conference || @conference
		@workshop_blocks = conference.workshop_blocks || []
		@block_days = []
		day = conference.start_date
		while day <= conference.end_date
			@block_days << day.wday
			day += 1.day
		end
	end

	def get_scheule_data(do_analyze = true)
		conference = @this_conference || @conference
		@meals = Hash[(conference.meals || {}).map{ |k, v| [k.to_i, v] }].sort.to_h
		@events = Event.where(:conference_id => conference.id).order(start_time: :asc)
		@workshops = Workshop.where(:conference_id => conference.id).order(start_time: :asc)
		@locations = {}

		get_block_data

		@schedule = {}
		day_1 = conference.start_date.wday

		@workshop_blocks.each_with_index do | info, block |
			info['days'].each do | block_day |
				day_diff = block_day.to_i - day_1
				day_diff += 7 if day_diff < 0
				day = (conference.start_date + day_diff.days).to_date
				time = info['time'].to_f
				@schedule[day] ||= { times: {}, locations: {} }
				@schedule[day][:times][time] ||= {}
				@schedule[day][:times][time][:type] = :workshop
				@schedule[day][:times][time][:length] = info['length'].to_f
				@schedule[day][:times][time][:item] = { block: block, workshops: {} }
			end
		end

		@workshops.each do | workshop |
			if workshop.block.present?
				block = @workshop_blocks[workshop.block['block'].to_i]
				day_diff = workshop.block['day'].to_i - day_1
				day_diff += 7 if day_diff < 0
				day = (conference.start_date + day_diff.days).to_date

				if @schedule[day].present? && @schedule[day][:times].present? && @schedule[day][:times][block['time'].to_f].present?
					@schedule[day][:times][block['time'].to_f][:item][:workshops][workshop.event_location_id] = { workshop: workshop, status: { errors: [], warnings: [], conflict_score: nil } }
					@schedule[day][:locations][workshop.event_location_id] ||= workshop.event_location if workshop.event_location.present?
				end
			end
		end

		@meals.each do | time, meal |
			day = meal['day'].to_date
			time = meal['time'].to_f
			@schedule[day] ||= {}
			@schedule[day][:times] ||= {}
			@schedule[day][:times][time] ||= {}
			@schedule[day][:times][time][:type] = :meal
			@schedule[day][:times][time][:length] = (meal['length'] || 1.0).to_f
			@schedule[day][:times][time][:item] = meal
		end

		@events.each do | event |
			day = event.start_time.midnight.to_date
			time = event.start_time.hour.to_f + (event.start_time.min / 60.0)
			@schedule[day] ||= {}
			@schedule[day][:times] ||= {}
			@schedule[day][:times][time] ||= {}
			@schedule[day][:times][time][:type] = :event
			@schedule[day][:times][time][:length] = (event.end_time - event.start_time) / 3600.0
			@schedule[day][:times][time][:item] = event
		end

		@schedule = @schedule.sort.to_h
		@schedule.each do | day, data |
			@schedule[day][:times] = data[:times].sort.to_h
		end

		@schedule.each do | day, data |
			last_event = nil
			data[:times].each do | time, time_data |
				if last_event.present?
					@schedule[day][:times][last_event][:next_event] = time
				end
				last_event = time
			end
			@schedule[day][:num_locations] = (data[:locations] || []).size
		end

		@schedule.deep_dup.each do | day, data |
			data[:times].each do | time, time_data |
				if time_data[:next_event].present? || time_data[:length] > 0.5
					span = 0.5
					length = time_data[:next_event].present? ? time_data[:next_event] - time : time_data[:length]
					while span < length
						@schedule[day][:times][time + span] ||= {
							type: (span >= time_data[:length] ? :empty : :nil),
							length: 0.5
						}
						span += 0.5
					end
				end
			end
		end

		@schedule = @schedule.sort.to_h

		@schedule.each do | day, data |
			@schedule[day][:times] = data[:times].sort.to_h
			@schedule[day][:locations] ||= {}
			
			# add an empty block if no workshops are scheduled on this day yet
			@schedule[day][:locations][0] = :add if do_analyze || @schedule[day][:locations].empty?

			if do_analyze
				data[:times].each do | time, time_data |
					if time_data[:type] == :workshop && time_data[:item].present? && time_data[:item][:workshops].present?
						ids = time_data[:item][:workshops].keys
						(0..ids.length).each do | i |
							if time_data[:item][:workshops][ids[i]].present?
								workshop_i = time_data[:item][:workshops][ids[i]][:workshop]
								conflicts = {}
								
								(i+1..ids.length).each do | j |
									workshop_j = time_data[:item][:workshops][ids[j]].present? ? time_data[:item][:workshops][ids[j]][:workshop] : nil
									if workshop_i.present? && workshop_j.present?
										workshop_i.active_facilitators.each do | facilitator_i |
											workshop_j.active_facilitators.each do | facilitator_j |
												if facilitator_i.id == facilitator_j.id
													@schedule[day][:times][time][:status] ||= {}
													@schedule[day][:times][time][:item][:workshops][ids[j]][:status][:errors] << {
															name: :common_facilitator,
															facilitator: facilitator_i,
															workshop: workshop_i,
															i18nVars: {
																facilitator_name: facilitator_i.name,
																workshop_title: workshop_i.title
															}
														}
												end
											end
										end
									end
								end

								location = workshop_i.event_location || EventLocation.new
								needs = JSON.parse(workshop_i.needs || '[]').map &:to_sym
								amenities = JSON.parse(location.amenities || '[]').map &:to_sym

								needs.each do | need |
									@schedule[day][:times][time][:item][:workshops][ids[i]][:status][:errors] << {
											name: :need_not_available,
											need: need,
											location: location,
											workshop: workshop_i,
											i18nVars: {
												need: need.to_s,
												location: location.title,
												workshop_title: workshop_i.title
											}
										} unless amenities.include? need
								end

								# collect common interested users
								interests = []
								(0..ids.length).each do | j |
									workshop_j = time_data[:item][:workshops][ids[j]].present? ? time_data[:item][:workshops][ids[j]][:workshop] : nil
									if workshop_i.present? && workshop_j.present? && workshop_i.id != workshop_j.id
										interests = interests | workshop_j.interested.map { | u | u.user_id }
									end
								end

								@schedule[day][:times][time][:item][:workshops][ids[i]][:status][:conflict_score] = (interests & (workshop_i.interested.map { | u | u.user_id })).length
							end
						end
					end
				end
			end
		end
	end
end