# plugins/prometheus/__init__.py
from __future__ import annotations
from typing import TYPE_CHECKING

if TYPE_CHECKING:
    from quart import Quart

_app: "Quart | None" = None


def setup(app: "Quart") -> None:
    global _app
    _app = app
    from .models import PrometheusTarget, PrometheusWidgetTemplate  # noqa: F401 — registers the tables
    register_widgets()


def register_widgets() -> None:
    """One dashboard widget for every target and template (System 181's
    ruling). Its target and template lists are read when the widget picker
    opens, so a new target or template appears without a restart."""
    from steward.core.widgets import register_widget

    from . import library
    register_widget({
        "key": "prometheus",
        "label": "Prometheus",
        "description": "One scrape target drawn by a widget template: Fabled Archives, or one you copy in",
        "hx_url": "/plugins/prometheus/widget",
        "detail_url": "/plugins/prometheus/targets/{target}",
        "plugin": "prometheus",
        "poll": True,
        "default_title": library.default_title,
        "params": [
            {"key": "target", "label": "Target", "type": "select", "default": "",
             "options_from": library.target_options,
             "empty": "No targets yet: add one under Prometheus first."},
            {"key": "template", "label": "Template", "type": "select", "default": "",
             "options_from": library.template_options,
             "empty": "No templates yet."},
        ],
    })


def get_scheduled_tasks() -> list:
    from .scheduler import make_scrape_task
    return [make_scrape_task(_app)]


def get_blueprint():
    from .routes import prometheus_bp
    return prometheus_bp


def get_nav() -> list[dict]:
    # Surfaces in the sidebar's Infrastructure group (scraped endpoints).
    return [{"label": "Prometheus", "href": "/plugins/prometheus/"}]


def get_alert_metrics() -> dict[str, list[str]]:
    """The metric names are whatever each endpoint exposes, so the list is
    empty here and the rule form offers the names recorded so far."""
    return {"prometheus": []}


def get_audit_entities() -> dict:
    """Audit rows about a target or a widget template name it and link to its page."""
    from .models import PrometheusTarget, PrometheusWidgetTemplate
    return {"prometheus_target": (PrometheusTarget, "/plugins/prometheus/targets/{}"),
            "prometheus_template": (PrometheusWidgetTemplate, "/plugins/prometheus/templates/custom:{}")}


def register_mcp_tools(register) -> None:
    from .mcp_tools import register_tools
    register_tools(register)


async def mcp_overview(db) -> list[dict]:
    from .mcp_tools import mcp_overview as findings
    return await findings(db)