import json
from pathlib import Path
from secrets import token_hex

from fastapi import APIRouter, Depends, status
from fastapi.responses import JSONResponse

from ..config import CRYPT_CONTEXT, DB, BaseConfig
from ..db import Certificate, DistinguishedName, User, UserCapability

router = APIRouter(prefix="/install")


CONFIG_FILE = "tmp/config.json"


async def has_config() -> bool:
    return Path(CONFIG_FILE).is_file()


async def load_config() -> BaseConfig:
    try:
        with open(CONFIG_FILE, "r") as kv:
            return BaseConfig.parse_obj(json.load(kv))

    except FileNotFoundError:
        return BaseConfig()


@router.get(
    "/config",
    response_model=BaseConfig,
    responses={
        status.HTTP_403_FORBIDDEN: {
            "description": "Must be admin",
            "content": None,
        },
    },
)
async def get_config(
    config: BaseConfig = Depends(load_config),
    has_config: bool = Depends(has_config),
):
    if has_config:
        return JSONResponse(status_code=status.HTTP_403_FORBIDDEN)

    return config


@router.put(
    "/config",
    responses={
        status.HTTP_200_OK: {
            "content": None,
        },
        status.HTTP_403_FORBIDDEN: {
            "description": "Must be admin",
            "content": None,
        },
    },
)
async def set_config(
    config: BaseConfig,
    has_config: bool = Depends(has_config),
):
    if has_config:
        return JSONResponse(status_code=status.HTTP_403_FORBIDDEN)

    if config.jwt.secret is None:
        config.jwt.secret = token_hex(32)

    with open(CONFIG_FILE, "w") as kv:
        kv.write(config.json(indent=2))


async def is_installed():
    return DB.table_exists(User)


@router.get("/check_installed", responses={
    status.HTTP_200_OK: {
        "model": bool,
    },
})
async def check_installed(is_installed: bool = Depends(is_installed)):
    return is_installed


@router.get(
    "/create_db",
    responses={
        status.HTTP_200_OK: {
            "content": None,
        },
        status.HTTP_400_BAD_REQUEST: {
            "description": "Could not create Database",
            "content": None,
        },
    },
)
async def create_db(is_installed: bool = Depends(is_installed)):
    if is_installed:
        return JSONResponse(
            status_code=status.HTTP_400_BAD_REQUEST,
        )

    DB.create_tables([Certificate, DistinguishedName, User, UserCapability])

    admin = User.create(name="admin", password=CRYPT_CONTEXT.hash("secret"))
    UserCapability.create(user=admin, capability="admin")

    User.create(name="johndoe", password=CRYPT_CONTEXT.hash("secret"))

    DB.close()