from re import compile as re_compile
from os import path as os_path, listdir
from MenuList import MenuList
from Components.Harddisk import harddiskmanager

from Tools.Directories import SCOPE_SKIN_IMAGE, resolveFilename

from enigma import RT_HALIGN_LEFT, eListboxPythonMultiContent, \
	eServiceReference, eServiceCenter, gFont
from Tools.LoadPixmap import LoadPixmap

EXTENSIONS = {
		"m4a": "music",
		"mp2": "music",
		"mp3": "music",
		"wav": "music",
		"ogg": "music",
		"flac": "music",
		"jpg": "picture",
		"jpeg": "picture",
		"png": "picture",
		"bmp": "picture",
		"ts": "movie",
		"avi": "movie",
		"divx": "movie",
		"mpg": "movie",
		"mpeg": "movie",
		"mkv": "movie",
		"mp4": "movie"
	}

def FileEntryComponent(name, absolute = None, isDir = False):
	res = [ (absolute, isDir) ]
	res.append((eListboxPythonMultiContent.TYPE_TEXT, 35, 1, 470, 20, 0, RT_HALIGN_LEFT, name))
	if isDir:
		png = LoadPixmap(resolveFilename(SCOPE_SKIN_IMAGE, "extensions/directory.png"))
	else:
		extension = name.split('.')
		extension = extension[-1].lower()
		if EXTENSIONS.has_key(extension):
			png = LoadPixmap(resolveFilename(SCOPE_SKIN_IMAGE, "extensions/" + EXTENSIONS[extension] + ".png"))
		else:
			png = None
	if png is not None:
		res.append((eListboxPythonMultiContent.TYPE_PIXMAP_ALPHATEST, 10, 2, 20, 20, png))
	
	return res

class FileList(MenuList):
	def __init__(self, directory, showDirectories = True, showFiles = True, showMountpoints = True, matchingPattern = None, useServiceRef = False, inhibitDirs = False, inhibitMounts = False, isTop = False, enableWrapAround = False, additionalExtensions = None):
		MenuList.__init__(self, list, enableWrapAround, eListboxPythonMultiContent)
		self.additional_extensions = additionalExtensions
		self.mountpoints = []
		self.current_directory = None
		self.current_mountpoint = None
		self.useServiceRef = useServiceRef
		self.showDirectories = showDirectories
		self.showMountpoints = showMountpoints
		self.showFiles = showFiles
		self.isTop = isTop
		# example: matching .nfi and .ts files: "^.*\.(nfi|ts)"
		self.matchingPattern = matchingPattern
		self.inhibitDirs = inhibitDirs or []
		self.inhibitMounts = inhibitMounts or []

		self.refreshMountpoints()
		self.changeDir(directory)
		self.l.setFont(0, gFont("Regular", 18))
		self.l.setItemHeight(23)
		self.serviceHandler = eServiceCenter.getInstance()

	def refreshMountpoints(self):
		self.mountpoints = [os_path.join(p.mountpoint, "") for p in harddiskmanager.getMountedPartitions()]
		self.mountpoints.sort(reverse = True)

	def getMountpoint(self, file):
		file = os_path.join(os_path.realpath(file), "")
		for m in self.mountpoints:
			if file.startswith(m):
				return m
		return False

	def getMountpointLink(self, file):
		if os_path.realpath(file) == file:
			return self.getMountpoint(file)
		else:
			if file[-1] == "/":
				file = file[:-1]
			mp = self.getMountpoint(file)
			last = file
			file = os_path.dirname(file)
			while last != "/" and mp == self.getMountpoint(file):
				last = file
				file = os_path.dirname(file)
			return os_path.join(last, "")

	def getSelection(self):
		if self.l.getCurrentSelection() is None:
			return None
		return self.l.getCurrentSelection()[0]

	def getCurrentEvent(self):
		l = self.l.getCurrentSelection()
		if not l or l[0][1] == True:
			return None
		else:
			return self.serviceHandler.info(l[0][0]).getEvent(l[0][0])

	def getFileList(self):
		return self.list

	def inParentDirs(self, dir, parents):
		dir = os_path.realpath(dir)
		for p in parents:
			if dir.startswith(p):
				return True
		return False

	def changeDir(self, directory, select = None):
		self.list = []

		# if we are just entering from the list of mount points:
		if self.current_directory is None:
			if directory and self.showMountpoints:
				self.current_mountpoint = self.getMountpointLink(directory)
			else:
				self.current_mountpoint = None
		self.current_directory = directory
		directories = []
		files = []

		if directory is None and self.showMountpoints: # present available mountpoints
			for p in harddiskmanager.getMountedPartitions():
				path = os_path.join(p.mountpoint, "")
				if path not in self.inhibitMounts and not self.inParentDirs(path, self.inhibitDirs):
					self.list.append(FileEntryComponent(name = p.description, absolute = path, isDir = True))
			files = [ ]
			directories = [ ]
		elif directory is None:
			files = [ ]
			directories = [ ]
		elif self.useServiceRef:
			root = eServiceReference("2:0:1:0:0:0:0:0:0:0:" + directory)
			if self.additional_extensions:
				root.setName(self.additional_extensions)
			serviceHandler = eServiceCenter.getInstance()
			list = serviceHandler.list(root)

			while 1:
				s = list.getNext()
				if not s.valid():
					del list
					break
				if s.flags & s.mustDescent:
					directories.append(s.getPath())
				else:
					files.append(s)
			directories.sort()
			files.sort()
		else:
			if os_path.exists(directory):
				files = listdir(directory)
				files.sort()
				tmpfiles = files[:]
				for x in tmpfiles:
					if os_path.isdir(directory + x):
						directories.append(directory + x + "/")
						files.remove(x)

		if directory is not None and self.showDirectories and not self.isTop:
			if directory == self.current_mountpoint and self.showMountpoints:
				self.list.append(FileEntryComponent(name = "<" +_("List of Storage Devices") + ">", absolute = None, isDir = True))
			elif (directory != "/") and not (self.inhibitMounts and self.getMountpoint(directory) in self.inhibitMounts):
				self.list.append(FileEntryComponent(name = "<" +_("Parent Directory") + ">", absolute = '/'.join(directory.split('/')[:-2]) + '/', isDir = True))

		if self.showDirectories:
			for x in directories:
				if not (self.inhibitMounts and self.getMountpoint(x) in self.inhibitMounts) and not self.inParentDirs(x, self.inhibitDirs):
					name = x.split('/')[-2]
					self.list.append(FileEntryComponent(name = name, absolute = x, isDir = True))

		if self.showFiles:
			for x in files:
				if self.useServiceRef:
					path = x.getPath()
					name = path.split('/')[-1]
				else:
					path = directory + x
					name = x

				if (self.matchingPattern is None) or re_compile(self.matchingPattern).search(path):
					self.list.append(FileEntryComponent(name = name, absolute = x , isDir = False))

		self.l.setList(self.list)

		if select is not None:
			i = 0
			self.moveToIndex(0)
			for x in self.list:
				p = x[0][0]
				
				if isinstance(p, eServiceReference):
					p = p.getPath()
				
				if p == select:
					self.moveToIndex(i)
				i += 1

	def getCurrentDirectory(self):
		return self.current_directory

	def canDescent(self):
		if self.getSelection() is None:
			return False
		return self.getSelection()[1]

	def descent(self):
		if self.getSelection() is None:
			return
		self.changeDir(self.getSelection()[0], select = self.current_directory)

	def getFilename(self):
		if self.getSelection() is None:
			return None
		x = self.getSelection()[0]
		if isinstance(x, eServiceReference):
			x = x.getPath()
		return x

	def getServiceRef(self):
		if self.getSelection() is None:
			return None
		x = self.getSelection()[0]
		if isinstance(x, eServiceReference):
			return x
		return None

	def execBegin(self):
		harddiskmanager.on_partition_list_change.append(self.partitionListChanged)

	def execEnd(self):
		harddiskmanager.on_partition_list_change.remove(self.partitionListChanged)

	def refresh(self):
		self.changeDir(self.current_directory, self.getFilename())

	def partitionListChanged(self, action, device):
		self.refreshMountpoints()
		if self.current_directory is None:
			self.refresh()