#  Copyright (c) 2019. Tobias Kurze
"""
This module provides functions related to authentication through the API.
For example: listing of available auth providers or registration of users.

Login through API does not start a new session, but instead returns JWT.
"""
import inspect
import pkgutil
from pprint import pprint

from flask_jwt_extended import jwt_required
from flask_restplus import fields, Resource

from backend import db, app
from backend.api import api_recorder
from backend.models.recorder_model import Recorder, RecorderModel, RecorderCommand
from backend.models.room_model import Room
import backend.recorder_adapters as r_a

recorder_model = api_recorder.model('Recorder', {
    'id': fields.String(required=False, description='The recorder\'s identifier'),
    'created_at': fields.DateTime(required=False, description='Creation date of the recorder'),
    'name': fields.String(min_length=3, required=True, description='The recorder\'s name'),
    'description': fields.String(required=False, description='The recorder\'s description'),
    'ip': fields.String(required=False, description='The recorder\'s IP address'),
    'network_name': fields.String(required=False, description='The recorder\'s network name'),
    'ssh_port': fields.Integer(required=True, default=22, description='The recorder\'s SSH port number'),
    'telnet_port': fields.Integer(required=True, default=23, description='The recorder\'s telnet port number'),
    'use_telnet_instead_ssh': fields.Boolean(required=False, default=False,
                                             description='If this is set, telnet will be used instead of ssh. '
                                                         'This might require specific commands.'),
    'recorder_model': fields.Nested(api_recorder.model('recorder_model',
                                                       {'id': fields.Integer(), 'name': fields.String()}),
                                    required=False,
                                    allow_null=True,
                                    skip_none=False,
                                    description='Model of the recorder.'),
    'room': fields.Nested(api_recorder.model('recorder_room',
                                             {'id': fields.Integer(), 'name': fields.String(),
                                              'number': fields.String(), 'alternate_name': fields.String()}),
                          required=False,
                          allow_null=True,
                          skip_none=False,
                          description='Room in which the recorder is located.')
})

recorder_command_model = api_recorder.model('Recorder Command', {
    'id': fields.String(required=False, description='The recorder command\'s identifier'),
    'name': fields.String(required=True, description='The recorder command\'s name'),
    'last_time_modified': fields.DateTime(required=False),
    'description': fields.String(required=False, description='The recorder command\'s description'),
    'parameters': fields.String(required=True, description='The recorder parameters'),
    'recorder_model': fields.Nested(api_recorder.model('recorder_command_models',
                                                       {'id': fields.Integer(), 'name': fields.String()})),
})

recorder_model_model = api_recorder.model('Recorder Model', {
    'id': fields.String(required=False, description='The recorder model\'s identifier'),
    'name': fields.String(attribute="model_name", required=True, description='The recorder model\'s name'),
    'last_time_modified': fields.DateTime(required=False),
    'notes': fields.String(required=False, description='The recorder model\'s notes'),

    'recorders': fields.List(fields.Nested(api_recorder.model('recorder_model',
                                                              {'id': fields.Integer(), 'name': fields.String(),
                                                               'network_name': fields.String(),
                                                               'ip': fields.String()})), required=False,
                             description='Model of the recorder.'),
    'commands': fields.List(fields.Nested(recorder_command_model), attribute="recorder_commands")
})


# ==

@api_recorder.route('/<int:id>')
@api_recorder.response(404, 'Recorder not found')
@api_recorder.param('id', 'The recorder identifier')
class RecorderResource(Resource):
    @jwt_required
    @api_recorder.doc('get_recorder')
    @api_recorder.marshal_with(recorder_model, skip_none=False)
    def get(self, id):
        """Fetch a recorder given its identifier"""
        recorder = Recorder.query.get(id)
        if recorder is not None:
            return recorder
        api_recorder.abort(404)

    @jwt_required
    @api_recorder.doc('delete_todo')
    @api_recorder.response(204, 'Todo deleted')
    def delete(self, id):
        """Delete a recorder given its identifier"""
        recorder = Recorder.query.get(id)
        if recorder is not None:
            db.session.delete(recorder)
            db.session.commit()
            return '', 204
        api_recorder.abort(404)

    @jwt_required
    @api_recorder.doc('update_recorder')
    @api_recorder.expect(recorder_model)
    def put(self, id):
        """Update a recorder given its identifier"""
        num_rows_matched = Recorder.query.filter_by(id=id).update(api_recorder.payload)
        if num_rows_matched < 1:
            api_recorder.abort(404)
        db.session.commit()
        return "ok"


@api_recorder.route('')
class RecorderList(Resource):
    @jwt_required
    @api_recorder.doc('recorders')
    @api_recorder.marshal_list_with(recorder_model, skip_none=False)
    def get(self):
        """
        List all recorders
        :return: recorders
        """
        return Recorder.get_all()

    @jwt_required
    @api_recorder.doc('create_recorder')
    @api_recorder.expect(recorder_model)
    @api_recorder.marshal_with(recorder_model, skip_none=False, code=201)
    def post(self):
        if "room_id" in api_recorder.payload:
            if api_recorder.payload["room_id"] is None:
                api_recorder.payload["room"] = None
            else:
                room = Room.query.get(api_recorder.payload["room_id"])
                if room is not None:
                    api_recorder.payload["room"] = room
                else:
                    return "specified room (id: {}) does not exist!".format(api_recorder.payload["room_id"]), 404
        if "recorder_model_id" in api_recorder.payload:
            if api_recorder.payload["recorder_model_id"] is None:
                api_recorder.payload["recorder_model"] = None
            else:
                rec_model = RecorderModel.query.get(api_recorder.payload["recorder_model_id"])
                if rec_model is not None:
                    api_recorder.payload["recorder_model"] = rec_model
                else:
                    return "specified recorder model (id: {}) does not exist!".format(
                        api_recorder.payload["recorder_model_id"]), 404
        recorder = Recorder(**api_recorder.payload)
        db.session.add(recorder)
        db.session.commit()
        return recorder


@api_recorder.route('/model/<int:id>')
@api_recorder.response(404, 'Recorder Model not found')
@api_recorder.param('id', 'The recorder model identifier')
class RecorderModelResource(Resource):
    @jwt_required
    @api_recorder.doc('get_recorder_model')
    @api_recorder.marshal_with(recorder_model_model)
    def get(self, id):
        """Fetch a recorder model given its identifier"""
        recorder_model = RecorderModel.query.get(id)
        if recorder_model is not None:
            return recorder_model
        api_recorder.abort(404)

    recorder_model_parser = api_recorder.parser()
    recorder_model_parser.add_argument('notes', type=str, required=True)

    @jwt_required
    @api_recorder.doc('update_recorder_model')
    @api_recorder.expect(recorder_model_parser)
    @api_recorder.marshal_with(recorder_model_model)
    def put(self, id):
        """Update a recorder_model given its identifier"""
        num_rows_matched = RecorderModel.query.filter_by(id=id).update(api_recorder.payload)
        if num_rows_matched < 1:
            api_recorder.abort(404)
        db.session.commit()
        return "ok"


@api_recorder.route('/model')
class RecorderModelList(Resource):
    @jwt_required
    @api_recorder.doc('recorders')
    @api_recorder.marshal_list_with(recorder_model_model)
    def get(self):
        return RecorderModel.get_all()


@api_recorder.route('/command/<int:id>')
@api_recorder.response(404, 'Recorder Command not found')
@api_recorder.param('id', 'The recorder command identifier')
class RecorderCommandResource(Resource):
    @jwt_required
    @api_recorder.doc('get_recorder_command')
    @api_recorder.marshal_with(recorder_command_model)
    def get(self, id):
        """Fetch a recorder command given its identifier"""
        recorder_command = RecorderCommand.query.get(id)
        if recorder_command is not None:
            return recorder_command
        api_recorder.abort(404)

    @jwt_required
    @api_recorder.doc('delete_recorder_command')
    @api_recorder.response(204, 'Recorder_command deleted')
    def delete(self, id):
        """Delete a recorder command given its identifier"""
        recorder_command = RecorderCommand.query.get(id)
        if recorder_command is not None:
            db.session.delete(recorder_command)
            db.session.commit()
            return '', 204
        api_recorder.abort(404)

    @jwt_required
    @api_recorder.doc('update_recorder_command')
    @api_recorder.expect(recorder_command_model)
    @api_recorder.marshal_with(recorder_command_model)
    def put(self, id):
        """Update a recorder command given its identifier"""
        num_rows_matched = RecorderCommand.query.filter_by(id=id).update(api_recorder.payload)
        if num_rows_matched < 1:
            api_recorder.abort(404)
        db.session.commit()
        return "ok"


@api_recorder.route('/command')
class RecorderCommandList(Resource):
    @jwt_required
    @api_recorder.doc('recorder_commands')
    @api_recorder.marshal_list_with(recorder_command_model)
    def get(self):
        """
        List all recorders commands
        :return: recorder commands
        """
        return RecorderCommand.get_all()

    @jwt_required
    @api_recorder.doc('create_recorder_commands')
    @api_recorder.expect(recorder_command_model)
    @api_recorder.marshal_with(recorder_command_model, code=201)
    def post(self):
        recorder_command = RecorderCommand(**api_recorder.payload)
        db.session.add(recorder_command)
        db.session.commit()
        return recorder_command