import logging

from flask import request

from app import billing as stripe, avatar
from endpoints.api import (resource, nickname, ApiResource, validate_json_request, request_error,
                           related_user_resource, internal_only, Unauthorized, NotFound,
                           require_user_admin, log_action, show_if, path_param,
                           require_scope)
from endpoints.api.team import team_view
from endpoints.api.user import User, PrivateRepositories
from auth.permissions import (AdministerOrganizationPermission,  OrganizationMemberPermission,
                              CreateRepositoryPermission)
from auth.auth_context import get_authenticated_user
from auth import scopes
from data import model
from data.billing import get_plan

import features


logger = logging.getLogger(__name__)



def org_view(o, teams):
  is_admin = AdministerOrganizationPermission(o.username).can()
  is_member = OrganizationMemberPermission(o.username).can()

  view = {
    'name': o.username,
    'email': o.email if is_admin else '',
    'avatar': avatar.compute_hash(o.email, name=o.username),
    'is_admin': is_admin,
    'is_member': is_member
  }

  if teams is not None:
    view['teams'] = {t.name : team_view(o.username, t) for t in teams}

  if is_admin:
    view['invoice_email'] = o.invoice_email

  return view


@resource('/v1/organization/')
@internal_only
class OrganizationList(ApiResource):
  """ Resource for creating organizations. """
  schemas = {
    'NewOrg': {
      'id': 'NewOrg',
      'type': 'object',
      'description': 'Description of a new organization.',
      'required': [
        'name',
        'email',
      ],
      'properties': {
        'name': {
          'type': 'string',
          'description': 'Organization username',
        },
        'email': {
          'type': 'string',
          'description': 'Organization contact email',
        },
      },
    },
  }

  @require_user_admin
  @nickname('createOrganization')
  @validate_json_request('NewOrg')
  def post(self):
    """ Create a new organization. """
    user = get_authenticated_user()
    org_data = request.get_json()
    existing = None

    try:
      existing = model.get_organization(org_data['name'])
    except model.InvalidOrganizationException:
      pass

    if not existing:
      try:
        existing = model.get_user(org_data['name'])
      except model.InvalidUserException:
        pass

    if existing:
      msg = 'A user or organization with this name already exists'
      raise request_error(message=msg)

    try:
      model.create_organization(org_data['name'], org_data['email'], user)
      return 'Created', 201
    except model.DataModelException as ex:
      raise request_error(exception=ex)


@resource('/v1/organization/<orgname>')
@path_param('orgname', 'The name of the organization')
@related_user_resource(User)
class Organization(ApiResource):
  """ Resource for managing organizations. """
  schemas = {
    'UpdateOrg': {
      'id': 'UpdateOrg',
      'type': 'object',
      'description': 'Description of updates for an existing organization',
      'properties': {
        'email': {
          'type': 'string',
          'description': 'Organization contact email',
        },
        'invoice_email': {
          'type': 'boolean',
          'description': 'Whether the organization desires to receive emails for invoices',
        },
        'tag_expiration': {
          'type': 'integer',
          'maximum': 2592000,
          'minimum': 0,
        },
      },
    },
  }

  @require_scope(scopes.ORG_ADMIN)
  @nickname('getOrganization')
  def get(self, orgname):
    """ Get the details for the specified organization """
    try:
      org = model.get_organization(orgname)
    except model.InvalidOrganizationException:
      raise NotFound()

    teams = None
    if OrganizationMemberPermission(orgname).can():
      teams = model.get_teams_within_org(org)

    return org_view(org, teams)


  @require_scope(scopes.ORG_ADMIN)
  @nickname('changeOrganizationDetails')
  @validate_json_request('UpdateOrg')
  def put(self, orgname):
    """ Change the details for the specified organization. """
    permission = AdministerOrganizationPermission(orgname)
    if permission.can():
      try:
        org = model.get_organization(orgname)
      except model.InvalidOrganizationException:
        raise NotFound()

      org_data = request.get_json()
      if 'invoice_email' in org_data:
        logger.debug('Changing invoice_email for organization: %s', org.username)
        model.change_invoice_email(org, org_data['invoice_email'])

      if 'email' in org_data and org_data['email'] != org.email:
        new_email = org_data['email']
        if model.find_user_by_email(new_email):
          raise request_error(message='E-mail address already used')

        logger.debug('Changing email address for organization: %s', org.username)
        model.update_email(org, new_email)

      if 'tag_expiration' in org_data:
        logger.debug('Changing organization tag expiration to: %ss', org_data['tag_expiration'])
        model.change_user_tag_expiration(org, org_data['tag_expiration'])

      teams = model.get_teams_within_org(org)
      return org_view(org, teams)
    raise Unauthorized()


@resource('/v1/organization/<orgname>/private')
@path_param('orgname', 'The name of the organization')
@internal_only
@related_user_resource(PrivateRepositories)
@show_if(features.BILLING)
class OrgPrivateRepositories(ApiResource):
  """ Custom verb to compute whether additional private repositories are available. """

  @require_scope(scopes.ORG_ADMIN)
  @nickname('getOrganizationPrivateAllowed')
  def get(self, orgname):
    """ Return whether or not this org is allowed to create new private repositories. """
    permission = CreateRepositoryPermission(orgname)
    if permission.can():
      organization = model.get_organization(orgname)
      private_repos = model.get_private_repo_count(organization.username)
      data = {
        'privateAllowed': False
      }

      if organization.stripe_id:
        cus = stripe.Customer.retrieve(organization.stripe_id)
        if cus.subscription:
          repos_allowed = 0
          plan = get_plan(cus.subscription.plan.id)
          if plan:
            repos_allowed = plan['privateRepos']

          data['privateAllowed'] = (private_repos < repos_allowed)


      if AdministerOrganizationPermission(orgname).can():
        data['privateCount'] = private_repos

      return data

    raise Unauthorized()


@resource('/v1/organization/<orgname>/members')
@path_param('orgname', 'The name of the organization')
class OrgnaizationMemberList(ApiResource):
  """ Resource for listing the members of an organization. """

  @require_scope(scopes.ORG_ADMIN)
  @nickname('getOrganizationMembers')
  def get(self, orgname):
    """ List the members of the specified organization. """
    permission = AdministerOrganizationPermission(orgname)
    if permission.can():
      try:
        org = model.get_organization(orgname)
      except model.InvalidOrganizationException:
        raise NotFound()

      # Loop to create the members dictionary. Note that the members collection
      # will return an entry for *every team* a member is on, so we will have
      # duplicate keys (which is why we pre-build the dictionary).
      members_dict = {}
      members = model.get_organization_members_with_teams(org)
      for member in members:
        if not member.user.username in members_dict:
          members_dict[member.user.username] = {'name': member.user.username,
                                                'kind': 'user',
                                                'is_robot': member.user.robot,
                                                'teams': []}

        members_dict[member.user.username]['teams'].append(member.team.name)

      return {'members': members_dict}

    raise Unauthorized()


@resource('/v1/organization/<orgname>/members/<membername>')
@path_param('orgname', 'The name of the organization')
@path_param('membername', 'The username of the organization member')
class OrganizationMember(ApiResource):
  """ Resource for managing individual organization members. """

  @require_scope(scopes.ORG_ADMIN)
  @nickname('getOrganizationMember')
  def get(self, orgname, membername):
    """ Get information on the specific orgnaization member. """
    permission = AdministerOrganizationPermission(orgname)
    if permission.can():
      try:
        org = model.get_organization(orgname)
      except model.InvalidOrganizationException:
        raise NotFound()

      member_dict = None
      member_teams = model.get_organization_members_with_teams(org, membername=membername)
      for member in member_teams:
        if not member_dict:
          member_dict = {'name': member.user.username,
                         'kind': 'user',
                         'is_robot': member.user.robot,
                         'teams': []}

        member_dict['teams'].append(member.team.name)

      if not member_dict:
        raise NotFound()

      return {'member': member_dict}

    raise Unauthorized()


@resource('/v1/app/<client_id>')
@path_param('client_id', 'The OAuth client ID')
class ApplicationInformation(ApiResource):
  """ Resource that returns public information about a registered application. """

  @nickname('getApplicationInformation')
  def get(self, client_id):
    """ Get information on the specified application. """
    application = model.oauth.get_application_for_client_id(client_id)
    if not application:
      raise NotFound()

    org_hash = avatar.compute_hash(application.organization.email,
                                   name=application.organization.username)
    app_hash = (avatar.compute_hash(application.avatar_email, name=application.name) if
                application.avatar_email else org_hash)

    return {
      'name': application.name,
      'description': application.description,
      'uri': application.application_uri,
      'avatar': app_hash,
      'organization': org_view(application.organization, [])
    }


def app_view(application):
  is_admin = AdministerOrganizationPermission(application.organization.username).can()

  return {
    'name': application.name,
    'description': application.description,
    'application_uri': application.application_uri,

    'client_id': application.client_id,
    'client_secret': application.client_secret if is_admin else None,
    'redirect_uri': application.redirect_uri if is_admin else None,
    'avatar_email': application.avatar_email if is_admin else None,
  }


@resource('/v1/organization/<orgname>/applications')
@path_param('orgname', 'The name of the organization')
class OrganizationApplications(ApiResource):
  """ Resource for managing applications defined by an organizations. """
  schemas = {
    'NewApp': {
      'id': 'NewApp',
      'type': 'object',
      'description': 'Description of a new organization application.',
      'required': [
        'name',
      ],
      'properties': {
        'name': {
          'type': 'string',
          'description': 'The name of the application',
        },
        'redirect_uri': {
          'type': 'string',
          'description': 'The URI for the application\'s OAuth redirect',
        },
        'application_uri': {
          'type': 'string',
          'description': 'The URI for the application\'s homepage',
        },
        'description': {
          'type': 'string',
          'description': 'The human-readable description for the application',
        },
        'avatar_email': {
          'type': 'string',
          'description': 'The e-mail address of the avatar to use for the application',
        }
      },
    },
  }

  @require_scope(scopes.ORG_ADMIN)
  @nickname('getOrganizationApplications')
  def get(self, orgname):
    """ List the applications for the specified organization """
    permission = AdministerOrganizationPermission(orgname)
    if permission.can():
      try:
        org = model.get_organization(orgname)
      except model.InvalidOrganizationException:
        raise NotFound()

      applications = model.oauth.list_applications_for_org(org)
      return {'applications': [app_view(application) for application in applications]}

    raise Unauthorized()

  @require_scope(scopes.ORG_ADMIN)
  @nickname('createOrganizationApplication')
  @validate_json_request('NewApp')
  def post(self, orgname):
    """ Creates a new application under this organization. """
    permission = AdministerOrganizationPermission(orgname)
    if permission.can():
      try:
        org = model.get_organization(orgname)
      except model.InvalidOrganizationException:
        raise NotFound()

      app_data = request.get_json()
      application = model.oauth.create_application(
        org, app_data['name'],
        app_data.get('application_uri', ''),
        app_data.get('redirect_uri', ''),
        description = app_data.get('description', ''),
        avatar_email = app_data.get('avatar_email', None),)


      app_data.update({
        'application_name': application.name,
        'client_id': application.client_id
      })

      log_action('create_application', orgname, app_data)

      return app_view(application)
    raise Unauthorized()


@resource('/v1/organization/<orgname>/applications/<client_id>')
@path_param('orgname', 'The name of the organization')
@path_param('client_id', 'The OAuth client ID')
class OrganizationApplicationResource(ApiResource):
  """ Resource for managing an application defined by an organizations. """
  schemas = {
    'UpdateApp': {
      'id': 'UpdateApp',
      'type': 'object',
      'description': 'Description of an updated application.',
      'required': [
        'name',
        'redirect_uri',
        'application_uri'
      ],
      'properties': {
        'name': {
          'type': 'string',
          'description': 'The name of the application',
        },
        'redirect_uri': {
          'type': 'string',
          'description': 'The URI for the application\'s OAuth redirect',
        },
        'application_uri': {
          'type': 'string',
          'description': 'The URI for the application\'s homepage',
        },
        'description': {
          'type': 'string',
          'description': 'The human-readable description for the application',
        },
        'avatar_email': {
          'type': 'string',
          'description': 'The e-mail address of the avatar to use for the application',
        }
      },
    },
  }

  @require_scope(scopes.ORG_ADMIN)
  @nickname('getOrganizationApplication')
  def get(self, orgname, client_id):
    """ Retrieves the application with the specified client_id under the specified organization """
    permission = AdministerOrganizationPermission(orgname)
    if permission.can():
      try:
        org = model.get_organization(orgname)
      except model.InvalidOrganizationException:
        raise NotFound()

      application = model.oauth.lookup_application(org, client_id)
      if not application:
        raise NotFound()

      return app_view(application)

    raise Unauthorized()

  @require_scope(scopes.ORG_ADMIN)
  @nickname('updateOrganizationApplication')
  @validate_json_request('UpdateApp')
  def put(self, orgname, client_id):
    """ Updates an application under this organization. """
    permission = AdministerOrganizationPermission(orgname)
    if permission.can():
      try:
        org = model.get_organization(orgname)
      except model.InvalidOrganizationException:
        raise NotFound()

      application = model.oauth.lookup_application(org, client_id)
      if not application:
        raise NotFound()

      app_data = request.get_json()
      application.name = app_data['name']
      application.application_uri = app_data['application_uri']
      application.redirect_uri = app_data['redirect_uri']
      application.description = app_data.get('description', '')
      application.avatar_email = app_data.get('avatar_email', None)
      application.save()

      app_data.update({
        'application_name': application.name,
        'client_id': application.client_id
      })

      log_action('update_application', orgname, app_data)

      return app_view(application)
    raise Unauthorized()

  @require_scope(scopes.ORG_ADMIN)
  @nickname('deleteOrganizationApplication')
  def delete(self, orgname, client_id):
    """ Deletes the application under this organization. """
    permission = AdministerOrganizationPermission(orgname)
    if permission.can():
      try:
        org = model.get_organization(orgname)
      except model.InvalidOrganizationException:
        raise NotFound()

      application = model.oauth.delete_application(org, client_id)
      if not application:
        raise NotFound()

      log_action('delete_application', orgname,
                 {'application_name': application.name, 'client_id': client_id})

      return 'Deleted', 204
    raise Unauthorized()


@resource('/v1/organization/<orgname>/applications/<client_id>/resetclientsecret')
@path_param('orgname', 'The name of the organization')
@path_param('client_id', 'The OAuth client ID')
@internal_only
class OrganizationApplicationResetClientSecret(ApiResource):
  """ Custom verb for resetting the client secret of an application. """
  @nickname('resetOrganizationApplicationClientSecret')
  def post(self, orgname, client_id):
    """ Resets the client secret of the application. """
    permission = AdministerOrganizationPermission(orgname)
    if permission.can():
      try:
        org = model.get_organization(orgname)
      except model.InvalidOrganizationException:
        raise NotFound()

      application = model.oauth.lookup_application(org, client_id)
      if not application:
        raise NotFound()

      application = model.oauth.reset_client_secret(application)
      log_action('reset_application_client_secret', orgname,
                 {'application_name': application.name, 'client_id': client_id})

      return app_view(application)
    raise Unauthorized()