import webnotes

class Profile:
	"""
	A profile object is created at the beginning of every request with details of the use.
	The global profile object is `webnotes.user`
	"""
	def __init__(self, name=''):
		self.name = name or webnotes.session.get('user')
		self.roles = []

		self.can_create = []
		self.can_read = []
		self.can_write = []
		self.can_get_report = []
		
	def _load_roles(self):
		res = webnotes.conn.sql('select role from tabUserRole where parent = "%s"' % self.name)
		self.roles = []
		for t in res:
			if t[0]: self.roles.append(t[0])
		if webnotes.session.get('user') == 'Guest':
			self.roles.append('Guest')
		else:
			self.roles.append('All')
			
		return self.roles

	def get_roles(self):
		"""
		get list of roles
		"""
		if self.roles:
			return self.roles
		
		return self._load_roles()
	
	def get_allow_list(self, key):
		"""
	      	Internal - get list of DocType where `key` is allowed. Key is either 'read', 'write' or 'create'
		"""
		conn = webnotes.conn
		roles = self.get_roles()
		return [r[0] for r in conn.sql('SELECT DISTINCT t1.parent FROM `tabDocPerm` t1, tabDocType t2 WHERE t1.`%s`=1 AND t1.parent not like "old_parent:%%" AND t1.parent = t2.name AND IFNULL(t2.istable,0) = 0 AND t1.role in ("%s") order by t1.parent' % (key, '", "'.join(roles)))]
	
	def get_create_list(self):
		"""
		Get list of DocTypes the user can create. Will filter DocTypes tagged with 'not_in_create' and table
		"""
		cl = self.get_allow_list('create')
		conn = webnotes.conn
		no_create_list = [r[0] for r in conn.sql('select name from tabDocType where ifnull(in_create,0)=1 or ifnull(istable,0)=1 or ifnull(issingle,0)=1')]
		self.can_create = filter(lambda x: x not in no_create_list, cl)
		return self.can_create
		
	def get_read_list(self):
		"""
		Get list of DocTypes the user can read
		"""
		self.can_read = list(set(self.get_allow_list('read') + self.get_allow_list('write')))
		return self.can_read
	
	def get_report_list(self):

		conn = webnotes.conn
	
		# get all tables list
		res = conn.sql('SELECT parent, options from tabDocField where fieldtype="Table"')
		table_types, all_tabletypes = {}, []
		
		# make a dictionary fo all table types
		for t in res: 
			all_tabletypes.append(t[1])
			if not table_types.has_key(t[0]):
				table_types[t[0]] = []
			table_types[t[0]].append(t[1])
	
		no_search_list = [r[0] for r in conn.sql('SELECT name FROM tabDocType WHERE read_only = 1 ORDER BY name')]
		# make the lists
		for f in self.can_read:
			tl = table_types.get(f, None)
			if tl:
				for t in tl:
					if t and (not t in self.can_get_report) and (not t in no_search_list):
						self.can_get_report.append(t)
			
			if f and (not f in self.can_get_report) and (not f in no_search_list): 
				self.can_get_report.append(f)
	
		return self.can_get_report
		
	def get_write_list(self):
		"""
		Get list of DocTypes the user can write
		"""	
		self.can_write = self.get_allow_list('write')
		return self.can_write

	def get_home_page(self):
		"""
		Get the name of the user's home page from the `Control Panel`
		"""
		try:
			hpl = webnotes.conn.sql("select role, home_page from `tabDefault Home Page` where parent='Control Panel' order by idx asc")
			for h in hpl:
				if h[0] in self.get_roles():
					return h[1]
		except:
			pass
		return webnotes.conn.get_value('Control Panel',None,'home_page') or 'Login Page'

	def get_defaults(self):
		"""
		Get the user's default values based on user and role profile
		"""
		roles = self.get_roles() + [self.name]
		res = webnotes.conn.sql('select defkey, defvalue from `tabDefaultValue` where parent in ("%s")' % '", "'.join(roles))
	
		self.defaults = {'owner': [self.name,]}

		for rec in res: 
			if not self.defaults.has_key(rec[0]): 
				self.defaults[rec[0]] = []
			self.defaults[rec[0]].append(rec[1] or '')

		return self.defaults
		
	def get_hide_tips(self):
		try:
			return webnotes.conn.sql("select hide_tips from tabProfile where name=%s", self.name)[0][0] or 0
		except:
			return 0
		
	def get_random_password(self):
		"""
		Generate a random password
		"""	
		import string
		from random import choice
		
		size = 9
		pwd = ''.join([choice(string.letters + string.digits) for i in range(size)])
		return pwd

	def reset_password(self):
		"""
		Reset the user's password and send an email
		"""
		pwd = self.get_random_password()
		
		# get profile
		profile = webnotes.conn.sql("SELECT name, email, first_name, last_name FROM tabProfile WHERE name=%s OR email=%s",(self.name, self.name))

		profile_cols = [desc[0] for desc in webnotes.conn.sql("DESCRIBE tabProfile")]

		if not profile:
			raise Exception, "Profile %s not found" % self.name
		elif 'registered' in profile_cols:
			if not webnotes.conn.sql("SELECT registered FROM tabProfile WHERE name=%s", self.name)[0][0]:
			# if an unregistered user tries to reset password
				raise Exception, "You cannot reset your password as you have not completed registration. You need to complete registration using the link provided in the email."

		# update tab Profile
		webnotes.conn.sql("UPDATE tabProfile SET password=password(%s) WHERE name=%s", (pwd, profile[0][0]))

		self.send_email("Password Reset", "<p>Dear %s%s,</p><p>your password has been changed to %s</p><p>[Automatically Generated]</p>" % (profile[0][2], (profile[0][3] and (' ' + profile[0][3]) or ''), pwd), profile[0][1])
		
	def send_email(self, subj, mess, email):
		import webnotes.utils.email_lib

		webnotes.utils.email_lib.sendmail(email, msg=mess, subject=subj)
	
	# update recent documents
	def update_recent(self, dt, dn):
		"""
		Update the user's `Recent` list with the given `dt` and `dn`
		"""
		conn = webnotes.conn
		from webnotes.utils import cstr
		import json

	
		# get list of child tables, so we know what not to add in the recent list
		child_tables = [t[0] for t in conn.sql('select name from tabDocType where istable = 1')]
		
		if not (dt in ['Print Format', 'Start Page', 'Event', 'ToDo Item', 'Search Criteria']) and not webnotes.is_testing and not (dt in child_tables):
			r = webnotes.conn.sql("select recent_documents from tabProfile where name=%s", self.name)[0][0] or ''

			
			# clear old style (to be removed)
			if '~~' in r: r = ''
			
			rdl = json.loads(r or '[]')
			new_rd = [dt, dn]
			
			# clear if exists
			for i in range(len(rdl)):
				rd = rdl[i]
				if rd==new_rd:
					del rdl[i]
					break

			rdl.append(new_rd)
			if len(rdl) > 20:
				rdl = rdl[:20]
			
			self.recent = json.dumps(rdl)
						
			webnotes.conn.sql("update tabProfile set recent_documents=%s where name=%s", (self.recent, self.name))
			
	def load_profile(self):
		"""
	      	Return a dictionary of user properites to be stored in the session
		"""
		t = webnotes.conn.sql('select email, first_name, last_name, recent_documents from tabProfile where name = %s', self.name)[0]

		d = {}
		d['name'] = self.name
		d['email'] = t[0] or ''
		d['first_name'] = t[1] or ''
		d['last_name'] = t[2] or ''
		d['recent'] = t[3] or ''
		
		d['hide_tips'] = self.get_hide_tips()
		
		d['roles'] = self.get_roles()
		d['defaults'] = self.get_defaults()
		
		d['can_create'] = self.get_create_list()
		d['can_read'] = self.get_read_list()
		d['can_write'] = self.get_write_list()
		d['can_get_report'] = self.get_report_list()
		
		return d
		
	def load_from_session(self, d):
		"""
		Setup the user profile from the dictionary saved in the session (generated by `load_profile`)
		"""
		self.can_create = d['can_create']
		self.can_read = d['can_read']
		self.can_write = d['can_write']
		self.can_get_report = d['can_get_report']

		self.roles = d['roles']
		self.defaults = d['defaults']

def get_user_img():
	if not webnotes.form.getvalue('username'):
		webnotes.response['message'] = 'no_img_m'
		return

	f = webnotes.conn.sql("select file_list from tabProfile where name=%s", webnotes.form.getvalue('username',''))
	if f:
		if f[0][0]:
			lst = f[0][0].split('\n')	
			webnotes.response['message'] = lst[0].split(',')[1]
		else:
			webnotes.response['message'] = 'no_img_m'		
	else:
		webnotes.response['message'] = 'no_img_m'