Ringa mabviro eModule:Location map

require('Module:No globals')

local p = {}

local getArgs = require('Module:Arguments').getArgs

local function getMapParams(map, frame)
	if not map then
		error('The name of the location map definition to use must be specified', 2)
	end
	local moduletitle = mw.title.new('Module:Location map/data/' .. map)
	if not moduletitle then
		error('"' .. map .. '" is not a valid name for a location map definition', 2)
	elseif moduletitle.exists then
		local mapData = mw.loadData('Module:Location map/data/' .. map)
		return function(name, params)
			if mapData[name] == nil then
				return ''
			elseif params then
				return mw.message.newRawMessage(tostring(mapData[name]), unpack(params)):plain()
			else
				return mapData[name]
			end
		end
	elseif mw.title.new('Template:Location map ' .. map).exists then
		local cache = {}
		return function(name, params)
			if params then
				return frame:expandTemplate{title = 'Location map ' .. map, args = { name, unpack(params) }}
			else
				if cache[name] == nil then
					cache[name] = frame:expandTemplate{title = 'Location map ' .. map, args = { name }}
				end
				return cache[name]
			end
		end
	else
		error('Unable to find the specified location map definition. Neither "Module:Location map/data/' .. map .. '" nor "Template:Location map ' .. map .. '" exists', 2)
	end
end

function p.data(frame, args, map)
	if not args then
		args = getArgs(frame)
	end
	if not map then
		map = getMapParams(args[1], frame)
	end
	local params = {}
	for k,v in ipairs(args) do
		if k > 2 then
			params[k-2] = v
		end
	end
	return map(args[2], #params and params)
end

local hemisphereMultipliers = {
	longitude = { W = -1, w = -1, E = 1, e = 1 },
	latitude = { S = -1, s = -1, N = 1, n = 1 }
}

local function decdeg(degrees, minutes, seconds, hemisphere, decimal, direction)
	if not degrees then
		if not decimal then
			error('No value was provided for ' .. direction, 2)
		end
		local retval = tonumber(decimal)
		if retval then
			return retval
		end
		error('The value "' .. decimal .. '" provided for ' .. direction .. ' is not valid', 2)
	end
	decimal = tonumber(degrees)
	if not decimal then
		error('The degree value "' .. degrees .. '" provided for ' .. direction .. ' is not valid', 2)
	end
	if minutes and not tonumber(minutes) then
		error('The minute value "' .. minutes .. '" provided for ' .. direction .. ' is not valid', 2)
	end
	if seconds and not tonumber(seconds) then
		error('The second value "' .. seconds .. '" provided for ' .. direction .. ' is not valid', 2)
	end
	decimal = decimal + (minutes or 0)/60 + (seconds or 0)/3600
	if hemisphere then
		local multiplier = hemisphereMultipliers[direction][hemisphere]
		if not multiplier then
			error('The hemisphere "' .. hemisphere .. '" provided for ' .. direction .. ' is not valid', 2)
		end
		decimal = decimal * multiplier
	end
	return decimal
end

function p.top(frame, args, map)
	if not args then
		args = getArgs(frame)
	end
	if not map then
		map = getMapParams(args[1], frame)
	end
	local width
	if not args.width then
		width = math.floor((args.default_width or 240) * (tonumber(map('defaultscale')) or 1) + 0.5)
	elseif mw.ustring.sub(args.width, -2) == 'px' then
		width = mw.ustring.sub(args.width, 1, -3)
	else
		width = args.width
	end
	local retval = args.float == 'center' and '<div class="center">' or ''
	if args.caption then
		retval = retval .. '<div class="thumb '
		if args.float == '"left"' or args.float == 'left' then
			retval = retval .. 'tleft'
		elseif args.float == '"center"' or args.float == 'center' or args.float == '"none"' or args.float == 'none' then
			retval = retval .. 'tnone'
		else
			retval = retval .. 'tright'
		end
		retval = retval .. '"><div class="thumbinner" style="width:' .. (width + 2) .. 'px'
		if args.border == 'none' then
			retval = retval .. ';border:none'
		elseif args.border then
			retval = retval .. ';border-color:' .. args.border
		end
		retval = retval .. '"><div style="position:relative;width:' .. width .. 'px' .. (args.border ~= 'none' and ';border:1px solid lightgray">' or '">')
	else
		retval = retval .. '<div style="width:' .. width .. 'px;'
		if args.float == '"left"' or args.float == 'left' then
			retval = retval .. 'float:left;clear:left'
		elseif args.float == '"center"' or args.float == 'center' then
			retval = retval .. 'float:none;clear:both;margin-left:auto;margin-right:auto'
		elseif args.float == '"none"' or args.float == 'none' then
			retval = retval .. 'float:none;clear:none'
		else
			retval = retval .. 'float:right;clear:right'
		end
		retval = retval .. '"><div style="width:' .. width .. 'px;padding:0"><div style="position:relative;width:' .. width .. 'px">'
	end
	local image
	if args.AlternativeMap then
		image = args.AlternativeMap
	elseif args.relief and map('image1') ~= '' then
		image = map('image1')
	else
		image = map('image')
	end
	retval = retval .. '[[File:' .. image .. '|' .. width .. 'px|' .. (args.alt or ((args.label or mw.title.getCurrentTitle().text) .. ' is located in ' .. map('name'))) .. ']]'
	if args.overlay_image then
		return retval .. '<div style="position:absolute;top:0;left:0">[[File:' .. args.overlay_image .. '|' .. width .. 'px|link=File:' .. image .. ']]</div>'
	else
		return retval
	end
end

function p.bottom(frame, args, map)
	if not args then
		args = getArgs(frame)
	end
	if not map then
		map = getMapParams(args[1], frame)
	end
	local retval = '</div><div ' .. (args.caption and 'class="thumbcaption">' or 'style="font-size:90%;padding-top:3px">')
	local caption = frame.args.caption or frame:getParent().args.caption
	if caption and not args.caption_undefined then
		retval = retval .. mw.text.trim(caption)
	else
		retval = retval .. (args.label or mw.title.getCurrentTitle().text) .. ' (' .. map('name') .. ')'
	end
	retval = retval .. '</div></div></div>'
	if args.float == 'center' then
		retval = retval .. '</div>'
	end
	if args.caption_undefined then
		retval = retval .. '[[Category:Location maps using skew|!]]'
	end
	return retval
end

function p.container(frame, args, map)
	if not args then
		args = getArgs(frame)
	end
	if not map then
		map = getMapParams(args[1], frame)
	end
	return p.top(frame, args, map) .. (args.places or '') .. p.bottom(frame, args, map)
end

local function markOuterDiv(x, y, content)
	return '<div style="position:absolute;top:' .. y .. '%;left:' .. x .. '%;height:0;width:0;margin:0;padding:0">' .. content .. '</div>'
end

local function markImageDiv(mark, marksize, label, link, alt, title)
	local retval = '<div style="position:relative;text-align:center;left:-' .. math.floor(marksize / 2 + 0.5) .. 'px;top:-' .. math.floor(marksize / 2 + 0.5) .. 'px;width:' .. marksize .. 'px;font-size:' .. marksize .. 'px;line-height:0"' .. (title and (' title="' .. title .. '">') or '>')
	if marksize ~= 0 then
		retval = retval .. '[[File:' .. mark .. '|' .. marksize .. 'x' .. marksize .. 'px|' .. label .. '|link=' .. link
		if alt then
			retval = retval .. '|alt=' .. alt
		end
		retval = retval .. ']]'
	end
	return retval .. '</div>'
end

local function markLabelDiv(label, label_size, label_width, position, background, x)
	local retval = '<div style="font-size:' .. label_size .. '%;line-height:110%;position:relative;top:-1.5em;width:' .. label_width .. 'em;'
	if position == 'top' then -- specified top
		retval = retval .. 'top:-2.65em;left:-3em;text-align:center'
	elseif position == 'bottom' then -- specified bottom
		retval = retval .. 'top:-0.15em;left:-3em;text-align:center'
	elseif position == 'left' or (tonumber(x) > 70 and position ~= 'right') then -- specified left or autodetected to left
		retval = retval .. 'left:-6.5em;text-align:right'
	else -- specified right or autodetected to right
		retval = retval .. 'left:0.5em;text-align:left'
	end
	retval = retval .. '"><span style="padding:1px'
	if background then
		retval = retval .. ';background-color:' .. background
	end
	return retval .. '">' .. label .. '</span></div>'
end

local function getX(longitude, left, right)
	local width = (right - left) % 360
	if width == 0 then
		width = 360
	end
	local distanceFromLeft = (longitude - left) % 360
	-- the distance needed past the map to the right equals distanceFromLeft - width. the distance needed past the map to the left equals 360 - distanceFromLeft. to minimize page stretching, go whichever way is shorter
	if distanceFromLeft - width / 2 >= 180 then
		distanceFromLeft = distanceFromLeft - 360
	end
	return 100 * distanceFromLeft / width
end

local function getY(latitude, top, bottom)
	return 100 * (top - latitude) / (top - bottom)
end

function p.mark(frame, args, map)
	if not args then
		args = getArgs(frame)
	end
	if not map then
		map = getMapParams(args[1], frame)
	end
	local x, y, longitude, latitude
	longitude = decdeg(args.lon_deg, args.lon_min, args.lon_sec, args.lon_dir, args.long, 'longitude')
	latitude = decdeg(args.lat_deg, args.lat_min, args.lat_sec, args.lat_dir, args.lat, 'latitude')
	local retval = ''
	if args.skew or args.lon_shift or (map('skew') ~= '') or (map('lat_skew') ~= '') or (map('crosses180') ~= '') then
		retval = retval .. '[[Category:Location maps using skew|' .. args[1] .. ']]'
	end
	if map('x') ~= '' then
		x = frame:callParserFunction('#expr', map('x', { latitude, longitude }))
	else
		x = getX(longitude, map('left'), map('right'))
	end
	if map('y') ~= '' then
		y = frame:callParserFunction('#expr', map('y', { latitude, longitude }))
	else
		y = getY(latitude, map('top'), map('bottom'))
	end
	local mark = args.mark or map('mark')
	if mark == '' then
		mark = 'Red pog.svg'
	end
	local divContent = markImageDiv(mark, tonumber(args.marksize) or tonumber(map('marksize')) or 8, args.label or mw.title.getCurrentTitle().text, args.link or '', args.alt, args[2])
	if args.label and args.position ~= 'none' then
		divContent = divContent .. markLabelDiv(args.label, args.label_size or 90, args.label_width or 6, args.position, args.background, x)
	end
	return retval .. markOuterDiv(x, y, divContent)
end

function p.main(frame, args, map)
	if not args then
		args = getArgs(frame)
	end
	if not args[1] then
		args[1] = 'World'
	end
	if not map then
		map = getMapParams(args[1], frame)
	end
	return p.top(frame, args, map) .. p.mark(frame, args, map) .. p.bottom(frame, args, map)
end

local function manyMakeArgs(fullArgs, n)
	if n == 1 then
		return {
			fullArgs[1],
			lat = fullArgs.lat1 or fullArgs.lat,
			long = fullArgs.long1 or fullArgs.long,
			lat_deg = fullArgs.lat1_deg or fullArgs.lat_deg,
			lat_min = fullArgs.lat1_min or fullArgs.lat_min,
			lat_sec = fullArgs.lat1_sec or fullArgs.lat_sec,
			lat_dir = fullArgs.lat1_dir or fullArgs.lat_dir,
			lon_deg = fullArgs.lon1_deg or fullArgs.lon_deg,
			lon_min = fullArgs.lon1_min or fullArgs.lon_min,
			lon_sec = fullArgs.lon1_sec or fullArgs.lon_sec,
			lon_dir = fullArgs.lon1_dir or fullArgs.lon_dir,
			mark = fullArgs.mark1 or fullArgs.mark,
			marksize = fullArgs.mark1size or fullArgs.marksize,
			link = fullArgs.link1 or fullArgs.link,
			label = fullArgs.label1 or fullArgs.label,
			label_size = fullArgs.label1_size or fullArgs.label_size,
			position = fullArgs.position1 or fullArgs.pos1 or fullArgs.position or fullArgs.pos,
			background = fullArgs.background1 or fullArgs.bg1 or fullArgs.background or fullArgs.bg
		}
	else
		return {
			fullArgs[1],
			lat = fullArgs['lat' .. n],
			long = fullArgs['long' .. n],
			lat_deg = fullArgs['lat' .. n .. '_deg'],
			lat_min = fullArgs['lat' .. n .. '_min'],
			lat_sec = fullArgs['lat' .. n .. '_sec'],
			lat_dir = fullArgs['lat' .. n .. '_dir'],
			lon_deg = fullArgs['lon' .. n .. '_deg'],
			lon_min = fullArgs['lon' .. n .. '_min'],
			lon_sec = fullArgs['lon' .. n .. '_sec'],
			lon_dir = fullArgs['lon' .. n .. '_dir'],
			mark = fullArgs['mark' .. n],
			marksize = fullArgs['mark' .. n .. 'size'],
			link = fullArgs['link' .. n],
			label = fullArgs['label' .. n],
			label_size = fullArgs['label' .. n .. '_size'],
			position = fullArgs['position' .. n] or fullArgs['pos' .. n],
			background = fullArgs['background' .. n] or fullArgs['bg' .. n]
		}
	end
end

function p.many(frame, args, map)
	if not args then
		args = getArgs(frame)
	end
	if not args[1] then
		args[1] = 'World'
	end
	if not map then
		map = getMapParams(args[1], frame)
	end
	local marks = {}
	local markhigh = args.markhigh
	for k, v in pairs(args) do -- @todo change to uargs once we have that
		if v then
			if string.sub(k, -4) == '_deg' then
				k = string.sub(k, 1, -5)
			end
			if string.sub(k, 1, 3) == 'lat' then
				k = tonumber(string.sub(k, 4))
				if k then
					table.insert(marks, k)
				end
			end
		end
	end
	table.sort(marks)
	if marks[1] ~= 1 and (args.lat or args.lat_deg) then
		table.insert(marks, 1, 1)
	end
	local body = ''
	for _, v in ipairs(marks) do
		-- don't try to consolidate this into the above loop. ordering of elements from pairs() is unspecified
		body = body .. p.mark(frame, manyMakeArgs(args, v), map)
		if args['mark' .. v .. 'high'] then
			markhigh = true
		end
	end
	args.label = nil -- there is no global label
	return p.top(frame, args, map) .. body .. p.bottom(frame, args, map) .. (markhigh and '[[Category:Location map many using markhigh parameter]]' or '')
end

return p