import fastapi
import fastapi_plugins

from fastapi_plugins.memcached import MemcachedSettings
from fastapi_plugins.memcached import memcached_plugin, TMemcachedPlugin

import asyncio
import aiojobs
import aioredis
import contextlib
import logging

@fastapi_plugins.registered_configuration
class AppSettings(
        fastapi_plugins.ControlSettings,
        fastapi_plugins.RedisSettings,
        fastapi_plugins.SchedulerSettings,
        fastapi_plugins.LoggingSettings,
        MemcachedSettings,
):
    api_name: str = str(__name__)
    logging_level: int = logging.DEBUG
    logging_style: fastapi_plugins.LoggingStyle = fastapi_plugins.LoggingStyle.logjson


@fastapi_plugins.registered_configuration(name='sentinel')
class AppSettingsSentinel(AppSettings):
    redis_type = fastapi_plugins.RedisType.sentinel
    redis_sentinels = 'localhost:26379'


@contextlib.asynccontextmanager
async def lifespan(app: fastapi.FastAPI):
    config = fastapi_plugins.get_config()
    await fastapi_plugins.config_plugin.init_app(app, config)
    await fastapi_plugins.config_plugin.init()
    await fastapi_plugins.log_plugin.init_app(app, config, name=__name__)
    await fastapi_plugins.log_plugin.init()
    await memcached_plugin.init_app(app, config)
    await memcached_plugin.init()
    await fastapi_plugins.redis_plugin.init_app(app, config=config)
    await fastapi_plugins.redis_plugin.init()
    await fastapi_plugins.scheduler_plugin.init_app(app=app, config=config)
    await fastapi_plugins.scheduler_plugin.init()
    await fastapi_plugins.control_plugin.init_app(
        app,
        config=config,
        version=__version__,
        environ=config.dict()
    )
    await fastapi_plugins.control_plugin.init()
    yield
    await fastapi_plugins.control_plugin.terminate()
    await fastapi_plugins.scheduler_plugin.terminate()
    await fastapi_plugins.redis_plugin.terminate()
    await memcached_plugin.terminate()
    await fastapi_plugins.log_plugin.terminate()
    await fastapi_plugins.config_plugin.terminate()


app = fastapi_plugins.register_middleware(fastapi.FastAPI(lifespan=lifespan))


@app.get("/")
async def root_get(
        cache: fastapi_plugins.TRedisPlugin,
        conf: fastapi_plugins.TConfigPlugin,
        logger: fastapi_plugins.TLoggerPlugin
) -> typing.Dict:
    ping = await cache.ping()
    logger.debug('root_get', extra=dict(ping=ping, api_name=conf.api_name))
    return dict(ping=ping, api_name=conf.api_name)


@app.post("/jobs/schedule/<timeout>")
async def job_post(
    timeout: int=fastapi.Query(..., title='the job sleep time'),
    cache: fastapi_plugins.TRedisPlugin,
    scheduler: fastapi_plugins.TSchedulerPlugin,
    logger: fastapi_plugins.TLoggerPlugin
) -> str:
    async def coro(job_id, timeout, cache):
        await cache.set(job_id, 'processing')
        try:
            await asyncio.sleep(timeout)
            if timeout == 8:
                logger.critical('Ugly erred job %s' % job_id)
                raise Exception('ugly error')
        except asyncio.CancelledError:
            await cache.set(job_id, 'canceled')
            logger.warning('Cancel job %s' % job_id)
        except Exception:
            await cache.set(job_id, 'erred')
            logger.error('Erred job %s' % job_id)
        else:
            await cache.set(job_id, 'success')
            logger.info('Done job %s' % job_id)

    job_id = str(uuid.uuid4()).replace('-', '')
    logger = await fastapi_plugins.log_adapter(logger, extra=dict(job_id=job_id, timeout=timeout))    # noqa E501
    logger.info('New job %s' % job_id)
    await cache.set(job_id, 'pending')
    logger.debug('Pending job %s' % job_id)
    await scheduler.spawn(coro(job_id, timeout, cache))
    return job_id


@app.get("/jobs/status/<job_id>")
async def job_get(
    job_id: str=fastapi.Query(..., title='the job id'),
    cache: fastapi_plugins.TRedisPlugin,
) -> typing.Dict:
    status = await cache.get(job_id)
    if status is None:
        raise fastapi.HTTPException(
            status_code=starlette.status.HTTP_404_NOT_FOUND,
            detail='Job %s not found' % job_id
        )
    return dict(job_id=job_id, status=status)


@app.post("/memcached/demo/<key>")
async def memcached_demo_post(
    key: str=fastapi.Query(..., title='the job id'),
    cache: fastapi_plugins.TMemcachedPlugin,
) -> typing.Dict:
    await cache.set(key.encode(), str(key + '_value').encode())
    value = await cache.get(key.encode())
    return dict(ping=(await cache.ping()).decode(), key=key, value=value)