"""Glue checks for Ariadne schedules exported to VictoriaMetrics."""

from __future__ import annotations

import os
from datetime import datetime, timezone
from pathlib import Path

import requests
import yaml


CONFIG_PATH = Path(__file__).with_name("config.yaml")


def _load_config() -> dict:
    with CONFIG_PATH.open("r", encoding="utf-8") as handle:
        return yaml.safe_load(handle) or {}


def _query(promql: str) -> list[dict]:
    vm_url = os.environ.get("VM_URL", "http://victoria-metrics-single-server:8428").rstrip("/")
    response = requests.get(f"{vm_url}/api/v1/query", params={"query": promql}, timeout=10)
    response.raise_for_status()
    payload = response.json()
    return payload.get("data", {}).get("result", [])


def _expected_tasks() -> list[dict]:
    cfg = _load_config()
    tasks = [
        _normalize_task(item, cfg)
        for item in cfg.get("ariadne_schedule_tasks", [])
    ]
    assert tasks, "No Ariadne schedule tasks configured"
    return tasks


def _normalize_task(item: object, cfg: dict) -> dict:
    if isinstance(item, str):
        return {
            "task": item,
            "check_last_success": True,
            "max_success_age_hours": cfg.get("max_success_age_hours", 48),
        }
    if isinstance(item, dict):
        normalized = dict(item)
        normalized.setdefault("check_last_success", True)
        normalized.setdefault("max_success_age_hours", cfg.get("max_success_age_hours", 48))
        return normalized
    raise TypeError(f"Unsupported Ariadne schedule task config entry: {item!r}")


def _tracked_tasks(tasks: list[dict]) -> list[dict]:
    tracked = [item for item in tasks if item.get("check_last_success")]
    assert tracked, "No Ariadne schedule tasks are marked for success tracking"
    return tracked


def _task_regex(tasks: list[dict]) -> str:
    return "|".join(item["task"] for item in tasks)


def test_ariadne_schedule_series_exist():
    tasks = _expected_tasks()
    selector = _task_regex(tasks)
    series = _query(f'ariadne_schedule_next_run_timestamp_seconds{{task=~"{selector}"}}')
    seen = {item.get("metric", {}).get("task") for item in series}
    missing = [item["task"] for item in tasks if item["task"] not in seen]
    assert not missing, f"Missing next-run metrics for: {', '.join(missing)}"


def test_ariadne_schedule_recent_success():
    tasks = _tracked_tasks(_expected_tasks())
    selector = _task_regex(tasks)
    series = _query(f'ariadne_schedule_last_success_timestamp_seconds{{task=~"{selector}"}}')
    seen = {item.get("metric", {}).get("task") for item in series}
    missing = [item["task"] for item in tasks if item["task"] not in seen]
    assert not missing, f"Missing last-success metrics for: {', '.join(missing)}"

    now = datetime.now(timezone.utc)
    age_by_task = {
        item.get("metric", {}).get("task"): (now - datetime.fromtimestamp(float(item["value"][1]), tz=timezone.utc)).total_seconds() / 3600
        for item in series
    }
    too_old = [
        f"{task} ({age_by_task[task]:.1f}h > {item['max_success_age_hours']}h)"
        for item in tasks
        if (task := item["task"]) in age_by_task and age_by_task[task] > float(item["max_success_age_hours"])
    ]
    assert not too_old, "Ariadne schedules are stale: " + ", ".join(too_old)


def test_ariadne_schedule_last_status_present_and_boolean():
    tasks = _tracked_tasks(_expected_tasks())
    selector = _task_regex(tasks)
    series = _query(f'ariadne_schedule_last_status{{task=~"{selector}"}}')
    seen = {item.get("metric", {}).get("task") for item in series}
    missing = [item["task"] for item in tasks if item["task"] not in seen]
    assert not missing, f"Missing last-status metrics for: {', '.join(missing)}"

    invalid = []
    for item in series:
        task = item.get("metric", {}).get("task")
        value = float(item["value"][1])
        if value not in (0.0, 1.0):
            invalid.append(f"{task}={value}")
    assert not invalid, f"Unexpected Ariadne last-status values: {', '.join(invalid)}"