#!/usr/bin/env python
#
# Copyright (C) 2016 GNS3 Technologies Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

"""
API endpoints for symbols.
"""

import os
import shutil

from fastapi import APIRouter, Request, status, File, UploadFile
from fastapi.responses import FileResponse

from gns3server.controller import Controller
from gns3server.endpoints.schemas.common import ErrorMessage
from gns3server.controller.controller_error import ControllerError, ControllerNotFoundError

import logging
log = logging.getLogger(__name__)


router = APIRouter()


@router.get("/")
def list_symbols():

    controller = Controller.instance()
    return controller.symbols.list()


@router.get("/{symbol_id:path}/raw",
            responses={404: {"model": ErrorMessage, "description": "Could not find symbol"}})
async def get_symbol(symbol_id: str):

    controller = Controller.instance()
    try:
        symbol = controller.symbols.get_path(symbol_id)
        return FileResponse(symbol)
    except (KeyError, OSError) as e:
        return ControllerNotFoundError("Could not get symbol file: {}".format(e))


@router.post("/{symbol_id:path}/raw",
             status_code=status.HTTP_204_NO_CONTENT)
async def upload_symbol(symbol_id: str, request: Request):
    """
    Upload a symbol file.
    """

    controller = Controller.instance()
    path = os.path.join(controller.symbols.symbols_path(), os.path.basename(symbol_id))

    try:
        with open(path, "wb") as f:
            f.write(await request.body())
    except (UnicodeEncodeError, OSError) as e:
        raise ControllerError("Could not write symbol file '{}': {}".format(path, e))

    # Reset the symbol list
    controller.symbols.list()


@router.get("/default_symbols")
def list_default_symbols():
    """
    Return list of default symbols.
    """

    controller = Controller.instance()
    return controller.symbols.default_symbols()