import os
from pathlib import Path

from annotatedyaml.loader import Secrets
from annotatedyaml.loader import load_yaml as load_annotated_yaml
from voluptuous import (
    PREVENT_EXTRA,
    All,
    Boolean,
    In,
    Length,
    MultipleInvalid,
    Optional,
    Range,
    Required,
    Schema,
)

from alpine_bits_python.const import (
    CONF_ALPINE_BITS_AUTH,
    CONF_DATABASE,
    CONF_HOTEL_ID,
    CONF_HOTEL_NAME,
    CONF_LOGGING,
    CONF_LOGGING_FILE,
    CONF_LOGGING_LEVEL,
    CONF_PASSWORD,
    CONF_PUSH_ENDPOINT,
    CONF_PUSH_TOKEN,
    CONF_PUSH_URL,
    CONF_PUSH_USERNAME,
    CONF_SERVER,
    CONF_SERVER_CODE,
    CONF_SERVER_CODECONTEXT,
    CONF_SERVER_COMPANYNAME,
    CONF_SERVER_RES_ID_SOURCE_CONTEXT,
    CONF_USERNAME,
    ENV_ALPINE_BITS_CONFIG_PATH,
)

# --- Voluptuous schemas ---
database_schema = Schema({Required("url"): str}, extra=PREVENT_EXTRA)


logger_schema = Schema(
    {
        Required(CONF_LOGGING_LEVEL, default="INFO"): str,
        Optional(CONF_LOGGING_FILE): str,  # If not provided, log to console
    },
    extra=PREVENT_EXTRA,
)


def ensure_string(value):
    """Ensure the value is a string."""
    if isinstance(value, str):
        return value
    return str(value)


server_info = Schema(
    {
        Required(CONF_SERVER_CODECONTEXT, default="ADVERTISING"): ensure_string,
        Required(CONF_SERVER_CODE, default="70597314"): ensure_string,
        Required(CONF_SERVER_COMPANYNAME, default="99tales Gmbh"): ensure_string,
        Required(CONF_SERVER_RES_ID_SOURCE_CONTEXT, default="99tales"): ensure_string,
    }
)


hotel_auth_schema = Schema(
    {
        Required(CONF_HOTEL_ID): ensure_string,
        Required(CONF_HOTEL_NAME): str,
        Required(CONF_USERNAME): str,
        Required(CONF_PASSWORD): str,
        Optional(CONF_PUSH_ENDPOINT): {
            Required(CONF_PUSH_URL): str,
            Required(CONF_PUSH_TOKEN): str,
            Optional(CONF_PUSH_USERNAME): str,
        },
    },
    extra=PREVENT_EXTRA,
)

basic_auth_schema = Schema(All([hotel_auth_schema], Length(min=1)))

# Email SMTP configuration schema
smtp_schema = Schema(
    {
        Required("host", default="localhost"): str,
        Required("port", default=587): Range(min=1, max=65535),
        Optional("username"): str,
        Optional("password"): str,
        Required("use_tls", default=True): Boolean(),
        Required("use_ssl", default=False): Boolean(),
    },
    extra=PREVENT_EXTRA,
)

# Email daily report configuration schema
daily_report_schema = Schema(
    {
        Required("enabled", default=False): Boolean(),
        Optional("recipients", default=[]): [str],
        Required("send_time", default="08:00"): str,
        Required("include_stats", default=True): Boolean(),
        Required("include_errors", default=True): Boolean(),
    },
    extra=PREVENT_EXTRA,
)

# Email error alerts configuration schema
error_alerts_schema = Schema(
    {
        Required("enabled", default=False): Boolean(),
        Optional("recipients", default=[]): [str],
        Required("error_threshold", default=5): Range(min=1),
        Required("buffer_minutes", default=15): Range(min=1),
        Required("cooldown_minutes", default=15): Range(min=0),
        Required("log_levels", default=["ERROR", "CRITICAL"]): [
            In(["DEBUG", "INFO", "WARNING", "ERROR", "CRITICAL"])
        ],
    },
    extra=PREVENT_EXTRA,
)

# Email monitoring configuration schema
monitoring_schema = Schema(
    {
        Optional("daily_report", default={}): daily_report_schema,
        Optional("error_alerts", default={}): error_alerts_schema,
    },
    extra=PREVENT_EXTRA,
)

# Complete email configuration schema
email_schema = Schema(
    {
        Optional("smtp", default={}): smtp_schema,
        Required("from_address", default="noreply@example.com"): str,
        Required("from_name", default="AlpineBits Server"): str,
        Optional("timeout", default=10): Range(min=1, max=300),
        Optional("monitoring", default={}): monitoring_schema,
    },
    extra=PREVENT_EXTRA,
)

# Pushover daily report configuration schema
pushover_daily_report_schema = Schema(
    {
        Required("enabled", default=False): Boolean(),
        Required("send_time", default="08:00"): str,
        Required("include_stats", default=True): Boolean(),
        Required("include_errors", default=True): Boolean(),
        Required("priority", default=0): Range(min=-2, max=2),  # Pushover priority levels
    },
    extra=PREVENT_EXTRA,
)

# Pushover error alerts configuration schema
pushover_error_alerts_schema = Schema(
    {
        Required("enabled", default=False): Boolean(),
        Required("error_threshold", default=5): Range(min=1),
        Required("buffer_minutes", default=15): Range(min=1),
        Required("cooldown_minutes", default=15): Range(min=0),
        Required("log_levels", default=["ERROR", "CRITICAL"]): [
            In(["DEBUG", "INFO", "WARNING", "ERROR", "CRITICAL"])
        ],
        Required("priority", default=1): Range(min=-2, max=2),  # Pushover priority levels
    },
    extra=PREVENT_EXTRA,
)

# Pushover monitoring configuration schema
pushover_monitoring_schema = Schema(
    {
        Optional("daily_report", default={}): pushover_daily_report_schema,
        Optional("error_alerts", default={}): pushover_error_alerts_schema,
    },
    extra=PREVENT_EXTRA,
)

# Complete pushover configuration schema
pushover_schema = Schema(
    {
        Optional("user_key"): str,  # Optional but required for pushover to work
        Optional("api_token"): str,  # Optional but required for pushover to work
        Optional("monitoring", default={}): pushover_monitoring_schema,
    },
    extra=PREVENT_EXTRA,
)

config_schema = Schema(
    {
        Required(CONF_DATABASE): database_schema,
        Required(CONF_ALPINE_BITS_AUTH): basic_auth_schema,
        Required(CONF_SERVER): server_info,
        Required(CONF_LOGGING): logger_schema,
        Optional("email"): email_schema,  # Email is optional
        Optional("pushover"): pushover_schema,  # Pushover is optional
        Optional("api_tokens", default=[]): [str],  # API tokens for bearer auth
    },
    extra=PREVENT_EXTRA,
)

DEFAULT_CONFIG_FILE = "config.yaml"


class Config:
    """Class to load and hold the configuration."""

    def __init__(
        self,
        config_folder: str | Path | None = None,
        config_name: str = DEFAULT_CONFIG_FILE,
        testing_mode: bool = False,
    ):
        if config_folder is None:
            config_folder = os.environ.get(ENV_ALPINE_BITS_CONFIG_PATH)
            if not config_folder:
                config_folder = Path(__file__).parent.joinpath("../../config").resolve()
        if isinstance(config_folder, str):
            config_folder = Path(config_folder)
        self.config_folder = config_folder
        self.config_path = config_folder / config_name
        self.secrets = Secrets(config_folder)
        self.testing_mode = testing_mode
        self._load_config()

    def _load_config(self):
        stuff = load_annotated_yaml(self.config_path, secrets=self.secrets)
        try:
            validated = config_schema(stuff)
        except MultipleInvalid as e:
            raise ValueError(f"Config validation error: {e}")
        self.database = validated["database"]
        self.basic_auth = validated["alpine_bits_auth"]
        self.config = validated

    def get(self, key, default=None):
        return self.config.get(key, default)

    @property
    def db_url(self) -> str:
        return self.database["url"]

    @property
    def hotel_id(self) -> str:
        return self.basic_auth["hotel_id"]

    @property
    def hotel_name(self) -> str:
        return self.basic_auth["hotel_name"]

    @property
    def users(self) -> list[dict[str, str]]:
        return self.basic_auth["users"]


# For backward compatibility
def load_config():
    return Config().config