"""
Classes to generate the item tree from json spec
"""

import logging
import sys

from .uptime_kuma import Monitor, Notification, Tag

logger = logging.getLogger(__name__)


def die_tag_format_error():
    logger.error(
        "Fatal: You must provide tags in monitors in the format [{name:str, value:str}] (value is optional)"
    )
    sys.exit(1)


def from_dict(api, tree):
    notif = tree.get("notifications", [])
    indexed_notifications = {n["name"]: Notification(api, **n) for n in notif}
    tags = tree.get("tags", [])
    indexed_tags = {t["name"]: Tag(api, **t) for t in tags}
    monitors = tree.get("monitors", [])
    indexed_monitors = {}
    for m in monitors:
        associated_tags = []
        for tag in m.get("tags", []):
            if not isinstance(tag, dict) or "name" not in tag:
                die_tag_format_error()
            try:
                associated_tags.append((indexed_tags[tag["name"]], tag.get("value")))
            except IndexError:
                die_tag_format_error()
        m["tags"] = associated_tags
        associated_notifications = [
            indexed_notifications[notif] for notif in m.get("notifications", [])
        ]
        m["notifications"] = associated_notifications
        if "name" not in m:
            logger.error("Fatal: All monitors must have a name")
            sys.exit(1)
        indexed_monitors[m["name"]] = Monitor(api, **m)
    return {
        "monitors": indexed_monitors.values(),
        "tags": indexed_tags.values(),
        "notifications": indexed_notifications.values(),
    }