# globals
$table = null
table_height = 0
card_height = 0
state = null
server_url = null
top_card_z = 0 # css z-index of front-most card

show_message = (txt) -> txt
	# FIXME implement chat box or something

# timeout function with args in convenient order
timeout = (ms, func) -> setTimeout func, ms

unless Array::shuffle?
	Array::shuffle = ->
		return if @length is 0
		top = @length

		while --top
			current = Math.floor(Math.random() * (top + 1))
			tmp = @[current]
			@[current] = @[top]
			@[top] = tmp
		return

new_button = (text) -> $ $ "<div class=\"button\">#{text}</div>"

# transform coordinates from client-side coords to server-side coords (or back)
# this makes it so p2 view everything upside down (mirrored), but still sends coords rightside up
transform_x = (x) -> x
transform_y = (y) ->
	return y unless state.agent is 'p2'
	return table_height - card_height - y

next_card_z = -> return top_card_z += 1

bring_card_to_front = (card) ->
	card.view.css "z-index": next_card_z()

instantiate_card = (card) ->
	text = card.text
	if card.owner is state.agent
		card_class = 'my_card'
	else
		card_class = 'your_card'

	view = $ $ "<div class=\"card #{card_class}\" style=\"left: #{transform_x(card.x)}px; top: #{transform_y(card.y)}px; z-index: #{next_card_z()}\"><span class=\"cardtext\">#{text}</span></div>"
	button_box = $ $ '<div/>'
	flip_button = new_button "flip over"
	mark_button = new_button "mark"
	flip_button.bind 'click', ->
		state.flip state.agent, card.number, ! view.hasClass 'flipped'
	mark_button.bind 'click', ->
		state.mark state.agent, card.number, ! view.hasClass 'marked'
	button_box.append flip_button
	button_box.append mark_button
	view.append button_box
	if card.marked
		view.addClass 'marked'
	if card.flipped
		view.addClass 'flipped'
	$table.append view
	view.draggable containment: '#table', grid: [20, 20]
	view.bind 'dragstart', (event, ui) ->
		view.css 'z-index': card.z = next_card_z()
	view.bind 'dragstop', (event, ui) ->
		p = view.position()
		state.move state.agent, card.number, transform_x(p.left), transform_y(p.top)
	card.view = view

error_lag = 3

outgoing_messages = []
# message should be [agent, method, args...]
# don't forget the agent (state.agent)
tell_server = (message) ->
	outgoing_messages.push message
	send_updates()

send_updates = ->
	return if outgoing_messages.length is 0

	messages = outgoing_messages
	outgoing_messages = []

	$.ajax "#{server_url}/set", {
		cache: false
		data: {
			agent: state.agent
			game: 'test' # FIXME, and it the /get call too
			messages: JSON.stringify(messages)
		}
		type: 'POST'
		dataType: 'json'
		error: (xhr, status, error) ->
			show_message "Network error while sending, you might want to refresh. Trying again in #{error_lag} seconds. (Status: #{status}, Error: #{error})"
			for message in messages
				outgoing_messages.unshift message
			timeout error_lag * 1000, send_updates
			error_lag *= 2
		success: (data, status, xhr) ->
			show_message "update sent"
			error_lag = 3
	}

error_lag = 3
poll_for_updates = ->
	$.ajax "#{server_url}/get?agent=#{state.agent}&game=test", {
		cache: false
		type: 'GET'
		dataType: 'json'
		error: (xhr, status, error) ->
			message "Network error, you might want to refresh. Trying again in #{error_lag} seconds. (Status: #{status}, Error: #{error})"
			timeout error_lag * 1000, poll_for_updates
			error_lag *= 2
		success: (data, status, xhr) ->
			state.process_messages data
			timeout 100, poll_for_updates
			error_lag = 3
	}

init = ->
	if window.location.hash? and window.location.hash.length > 0
		me = window.location.hash.substr 1
		winloc = "#{window.location}"
		server_url = winloc.substr 0, winloc.length - window.location.hash.length
	else
		me = 'p1'
		server_url = window.location

	state = window.game_model.new me
	state.on 'move', (agent, card, x, y) ->
		# FIXME add/handle pile argument
		if agent is me
			tell_server ['move', agent, card, x, y]
		else
			bring_card_to_front state.cards[card]
			state.cards[card].view.animate { left: "#{transform_x x}px", top: "#{transform_y y}px"}, 800
	state.on 'mark', (agent, card, state) ->
		@cards[card].view.toggleClass 'marked', state
		if agent is me
			tell_server ['mark', agent, card, state]
	state.on 'flip', (agent, card, state) ->
		@cards[card].view.toggleClass 'flipped', state
		if agent is me
			tell_server ['flip', agent, card, state]
	state.on 'set_cards', (agent, cards) ->
		# FIXME add agent arg and tell server if it's not us
		$('.card').remove()
		for card in cards
			instantiate_card card
		if agent is me
			tell_server ['set_cards', agent, cards]

	# timeout so browser will stop showing that we're loading
	timeout 1, poll_for_updates
	timeout 2, ->
		# ask for initial state
		tell_server ['send_state', state.agent]

$ ->
	$table = $ '#table'
	table_height = $table.height()
	card_height = $('#loading-card').outerHeight()

	init()