# -*- encoding: utf-8 -*-
import pkg_resources

from asyncio import get_event_loop
from aiohttp import web
import click
from pprint import pformat as pp
import yaml

from phi.config import get_config, merge_config
from phi.logging import setup_logging, get_logger
from phi.api.app import api_app

log = get_logger(__name__)


def setup_app(config):
    loop = get_event_loop()

    app = web.Application(loop=loop)
    app["config"] = config

    api = api_app(config)
    app.add_subapp("/api", api)

    return app


def run_app(app):
    web.run_app(
        app,
        host=app["config"]["core"]["listen"].get("host", "127.0.0.1"),
        port=app["config"]["core"]["listen"].get("port", "8080"),
    )


def _validate_port(ctx, param, value):
    """
    Callback to validate provided port.
    """
    if 0 < value or value > 65535:
        raise click.BadParameter(
            "Provided value is not in the range 0-65535: {} [type: {}]".format(
                value, type(value)
            )
        )
    return value


@click.command(help="phid is the main application daemon.")
@click.option(
    "--config",
    "config_path",
    type=click.Path(exists=True),
    help="Path to a valid config file.",
)
@click.option(
    "-H",
    "--host",
    type=click.STRING,
    default="localhost",
    help='Address to which the application bounds. Defaults to "localhost".',
)
@click.option(
    "-p",
    "--port",
    type=click.INT,
    default=8080,
    help="Port to which the application bounds. Defaults to 8080.",
)
@click.option(
    "--ldap-host",
    "ldap_host",
    type=click.STRING,
    default="localhost",
    help='Address of the LDAP server to connect to. Defaults to "localhost".',
)
@click.option(
    "--ldap-port",
    "ldap_port",
    type=click.INT,
    default=389,
    help="Port where is exposed the LDAP server to connect to. Defaults to 389.",
)
@click.option(
    "--ldap-crypt",
    "ldap_crypt",
    is_flag=True,
    default=True,
    help="Connect to the LDAP server using TLSv1.2. Defaults to True.",
)
@click.option(
    "--ldap-tls-do-not-validate",
    "ldap_tls_validate",
    is_flag=True,
    default=True,
    help="Toggle checking of TLS cert against the provided name. Defaults to True.",
)
@click.option(
    "--ldap-tls-ca",
    "ldap_tls_ca",
    type=click.Path(exists=True),
    help="Toggle checking of TLS cert against the provided name. Defaults to True.",
)
@click.option(
    "--ldap-base-dn", "ldap_base_dn", type=click.STRING, help="The LDAP base_dn to use."
)
@click.option(
    "--ldap-username",
    "ldap_username",
    type=click.STRING,
    help="The username to use to connect to the LDAP server.",
)
@click.option(
    "--ldap-password",
    "ldap_password",
    type=click.STRING,
    help="The password to use to connect to the LDAP server. "
    "THIS CAN BE READ BY OTHER PROCESSES. NEVER USE IN PRODUCTION!",
)
@click.option(
    "--log-conf",
    "log_conf",
    type=click.Path(exists=True),
    help="Path to a yaml configuration for the logger.",
)
@click.option(
    "--debug", "debug", is_flag=True, default=False, help="Set the log level to debug.",
)
def cli(
    host,
    port,
    config_path=None,
    ldap_host=None,
    ldap_port=None,
    ldap_crypt=True,
    ldap_tls_validate=True,
    ldap_tls_ca=None,
    ldap_base_dn=None,
    ldap_username=None,
    ldap_password=None,
    log_conf=None,
    debug=False,
):
    cli_config = prepare_config_from_cli(
        host,
        port,
        ldap_host,
        ldap_port,
        ldap_crypt,
        ldap_tls_validate,
        ldap_tls_ca,
        ldap_base_dn,
        ldap_username,
        ldap_password,
        log_conf,
        debug,
    )
    config_file, file_config = get_config(config_path)
    config = merge_config(cli_config, file_config)
    if debug:
        set_to_debug(config)
    # Beware that everything happened until now
    # could not possibly get logged.
    setup_logging(config.get("logging", {}))
    if config_file:
        log.debug("Config file found at: %s", config_file)
        log.debug("{}".format(pp(file_config)))
    log.debug("CLI config:\n{}".format(pp(cli_config)))
    log.info("Starting app with config:\n{}".format(pp(config)))

    app = setup_app(config)
    run_app(app)


def prepare_config_from_cli(
    host,
    port,
    ldap_host=None,
    ldap_port=None,
    ldap_crypt=True,
    ldap_tls_validate=True,
    ldap_tls_ca=None,
    ldap_base_dn=None,
    ldap_username=None,
    ldap_password=None,
    log_conf=None,
    debug=False,
):
    _core = {"listen": {"host": host, "port": port}}
    _ldap = {
        "host": ldap_host,
        "port": ldap_port,
        "encryption": "TLSv1.2" if ldap_crypt else None,
        "validate": ldap_tls_validate,
        "ca_certs": ldap_tls_ca,
        "username": ldap_username,
        "password": ldap_password,
        "base_dn": ldap_base_dn,
    }
    _logging = {}
    if log_conf:
        with open(log_conf) as log_conf_fd:
            _logging = yaml.safe_load(log_conf_fd)

    return {"core": _core, "ldap": _ldap, "logging": _logging}


def set_to_debug(conf):
    for logger, log_conf in conf["logging"]["loggers"].items():
        log_conf["level"] = "DEBUG"
        conf["logging"]["loggers"][logger] = log_conf