from socket import gethostname

from psutil import cpu_percent

from lego_monitoring.alerting.alert import Alert
from lego_monitoring.alerting.enum import AlertType, Severity
from lego_monitoring.core import cvars

from .utils import format_for_healthchecks_slug

IS_TESTING = False


def cpu_check() -> list[Alert]:
    percentage = cpu_percent()
    config = cvars.config.get().checks.cpu
    slug = f"{format_for_healthchecks_slug(gethostname())}-cpu"
    if config.critical_percentage and (IS_TESTING or percentage >= config.critical_percentage):
        return [
            Alert(
                alert_type=AlertType.CPU,
                message=f"CPU load: {percentage:.2f}% >= {config.critical_percentage:.2f}%",
                severity=Severity.CRITICAL,
                healthchecks_slug=slug,
            )
        ]
    elif config.warning_percentage and (IS_TESTING or percentage >= config.warning_percentage):
        return [
            Alert(
                alert_type=AlertType.CPU,
                message=f"CPU load: {percentage:.2f}% >= {config.warning_percentage:.2f}%",
                severity=Severity.WARNING,
                healthchecks_slug=slug,
            )
        ]
    else:
        return [
            Alert(
                alert_type=AlertType.CPU,
                message=f"CPU load: {percentage:.2f}% (nominal)",
                severity=Severity.OK,
                healthchecks_slug=slug,
            )
        ]