###
 * coffeescript-ui - Coffeescript User Interface System (CUI)
 * Copyright (c) 2013 - 2016 Programmfabrik GmbH
 * MIT Licence
 * https://github.com/programmfabrik/coffeescript-ui, http://www.coffeescript-ui.org
###

marked = require('marked')
CUI.Template.loadTemplateText(require('./Label.html'));

# @param [Object] options for {Label} creation
# @option options [boolean] centered , label will be centered with css style 'position: absolute'.
class CUI.Label extends CUI.DOMElement

	@defaults:
		manage_overflow:
			icon_inactive: "down"
			icon_active: "up"
			active_css_class: ""

	constructor: (opts) ->
		super(opts)

		if @_rotate_90
			tname = "label-rotate-90"
		else if @_icon or not CUI.__ng__
			tname = "label"
		else
			tname = "label-no-icon"

		@__label = new CUI.Template
			name: tname
			map_prefix: "cui-label"
			map:
				icon: if tname == "label-no-icon" then undefined else true
				content: true

		@registerTemplate(@__label)

		if @_icon and @_icon != true
			@setIcon(@_icon)

		if not CUI.util.isEmpty(@_text)
			@setText(@_text)
		else
			@setContent(@_content)

		if @_tooltip
			tt_opts = CUI.util.copyObject(@_tooltip)
			tt_opts.element ?= @DOM
			@__tooltip = new CUI.Tooltip(tt_opts)

		if @_multiline
			@addClass("cui-label-multiline")

		if @_centered
			@addClass("cui-label-centered")

		if @_markdown
			@addClass("cui-label-markdown")

		if @_manage_overflow
			@addClass("cui-label-manage-overflow")

		if @_padded
			@addClass("cui-label--padded")

		if @_size
			@addClass("cui-label-size-"+@_size)
		else if not CUI.__ng__
			@addClass("cui-label-size-normal") #need to set normal as default for mediathek! and light

		if @_appearance
			@addClass("cui-label-appearance-"+@_appearance)

		if @_manage_overflow

			if @_manage_overflow == true
				btn_opts = CUI.util.copyObject(CUI.defaults.class.Label.defaults.manage_overflow, true)
			else
				btn_opts = @_manage_overflow

			for k, v of {
				class: "cui-label-manage-overflow-button"
				appearance: "flat"
				switch: true
				hidden: true
				onActivate: =>
					@__label.addClass("cui-label--show-overflow")
				onDeactivate: =>
					@__label.removeClass("cui-label--show-overflow")
			}
				if not btn_opts.hasOwnProperty(k) or
					k not in ["class"]
						btn_opts[k] = v
						continue

				btn_opts[k] += " "+v

			@__overflow_button = new CUI.defaults.class.Button(btn_opts)

			# push in global markup
			@append(@__overflow_button)

			# throttle the check to partially mitigate the performance bottleneck
			# when resizing via resize handle  when a lot of "manage overflow"
			# labels are in the DOM
			checkOverflow = => @checkOverflowSize()

			CUI.Events.listen
				node: @DOM
				type: "viewport-resize"
				call: =>
					CUI.scheduleCallback(ms: 500, call: checkOverflow)
		return

	initOpts: ->
		super()
		@addOpts
			text:
				check: (v) ->
					CUI.util.isString(v) or CUI.util.isNumber(v)
			text_node_func:
				check: Function
			content:
				check: (v) ->
					CUI.util.isContent(v) or CUI.util.isString(v)
			icon:
				check: (v) ->
					v instanceof CUI.Icon or CUI.util.isString(v) or v == true
			size:
				check: ["mini","normal","big","bigger"]
			appearance:
				check: ["title","secondary","muted"]
			# set to true if text is markdown
			markdown:
				mandatory: true
				default: false
				check: Boolean
			markdown_opts:
				check: "PlainObject"
			tooltip:
				check: "PlainObject"
			group:
				check: String
			rotate_90:
				default: false
				check: Boolean
			centered:
				default: false
				check: Boolean
			multiline:
				default: false
				check: Boolean
			padded:
				default: false
				check: Boolean
			manage_overflow:
				check: (v) ->
					CUI.util.isPlainObject(v) or v == true or v == false


	readOpts: ->
		super()
		if CUI.util.isNull(@_text) and CUI.util.isNull(@_content)
			@_text = ""

		if @_markdown
			CUI.util.assert(not @_content, "new "+@__cls, "opts.markdown cannot be combined with opts.content, use opts.text instead.", opts: @opts)
			if not marked
				console.error("new CUI.Label: Could not find markdown renderer 'marked'. Disabling markedown option.", opts: @opts)
				@__markdown = false
			else
				@__markdown = true

		@__currentText = null
		CUI.util.assert(CUI.util.xor(CUI.util.isNull(@_text), CUI.util.isNull(@_content)), "new CUI.Label", "opts.text and opts.content cannot both be set.", opts: @opts)

		if @_markdown_opts
			@__markdown_opts = CUI.util.copyObject(CUI.defaults.marked_opts, false)
			for k, v of @_markdown_opts
				@__markdown_opts[k] = v
		else
			@__markdown_opts = CUI.defaults.marked_opts

		if @_manage_overflow
			CUI.util.assert(@_multiline, "new CUI.Label", "opts.multiline needs to be set for opts.manage_overflow", opts: @opts)
		@

	setText: (@__currentText, markdown = @__markdown) ->
		if CUI.util.isEmpty(@__currentText)
			@empty("content")
		else if markdown
			@setContent(CUI.dom.htmlToNodes(marked(@__currentText, @__markdown_opts)))
			@addClass("cui-label-markdown")
		else if @_text_node_func
			@setContent(@_text_node_func(@__currentText))
			@removeClass("cui-label-markdown")
		else
			@setContent(CUI.dom.text(@__currentText))
			@removeClass("cui-label-markdown")
		@

	setTextMaxChars: (max_chars) ->
		CUI.dom.setAttribute(@__label.map.content, "data-max-chars", max_chars)

	getText: ->
		@__currentText

	setContent: (content) ->
		if CUI.util.isString(content)
			@replace(CUI.dom.htmlToNodes(content), 'content')
		else
			@replace(content, "content")

		if not @_manage_overflow
			return

		# append overflow button to the whole thing
		@append(@__overflow_button)

		CUI.dom.waitForDOMInsert(node: @DOM)
		.done =>
			@checkOverflowSize()

		return


	checkOverflowSize: ->
		if not @__overflow_button
			return

		# show full content and see if it fits
		@__label.removeClass("cui-label--show-overflow")
		@__label.addClass("cui-label--measure-overflow")

		@__overflow_button.hide()

		dim_div = CUI.dom.getDimensions(@__label.map.content)

		max_height = CUI.dom.getCSSFloatValue(dim_div.computedStyle.maxHeight)
		if not (max_height > 0)
			max_height = dim_div.clientHeight

		# console.info("Label.checkOverflowSize: Scroll Height:", dim_div.scrollHeight, " Using Height: ", max_height, "Element:", @__label.map.content)

		if dim_div.scrollHeight > max_height
			# really to big, show button
			@__overflow_button.show()
			if @__overflow_button.isActive()
				@__label.addClass("cui-label--show-overflow")
		else
			@__label.addClass("cui-label--show-overflow")

		@__label.removeClass("cui-label--measure-overflow")
		@

	getGroup: ->
		@_group

	setIcon: (icon) ->
		if icon instanceof CUI.Icon
			__icon = icon
		else if not CUI.util.isEmpty(icon)
			__icon = new CUI.Icon(icon: icon)
		else
			__icon = null

		@replace(__icon, "icon")
		@

	destroy: ->
		@__tooltip?.destroy()
		super()

	# reads the input txt, parses links and returns
	# dom notes. suitable to use as text_node_func.
	@parseLinks: (txt) ->
		nodes = []
		text = []

		append_text = =>
			if text.length == 0
				return
			nodes.push(CUI.dom.text(text.join("")))
			text = []
			return

		for el, idx in txt.split(/(\n| )/)

			if CUI.EmailInput.regexp.exec(el)
				a_node = CUI.dom.element("a", href: "mailto:"+el)
			else
				m = el.match("^(?:www\..+\..+|(http(?:s|)):\/\/)")
				if not m
					a_node = null
				else
					if not m[1]
						prefix = "http://"
					else
						prefix = "" # use the given prefix

					a_node = CUI.dom.element("a", target: "_blank", href: prefix+el)

			if not a_node
				text.push(el)
				continue

			# append the link
			append_text()

			a_node.textContent = el
			nodes.push(a_node)

		append_text()
		return nodes



CUI.defaults.class.Label = CUI.Label