// Match webhook events against event trigger conditions.

import { getEnabledEventTriggers, type EventTrigger } from "./event-store";
import { type ParsedEvent } from "./template";

function escapeRegex(s: string): string {
  return s.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
}

function globMatch(pattern: string, value: string): boolean {
  const regex = new RegExp(
    "^" + pattern.split("*").map(escapeRegex).join(".*") + "$",
  );
  return regex.test(value);
}

export function matchesTrigger(trigger: EventTrigger, event: ParsedEvent): boolean {
  if (!trigger.enabled) return false;

  if (trigger.eventType !== "*" && trigger.eventType !== event.eventType) return false;

  if (trigger.repoFilter && !globMatch(trigger.repoFilter, event.repo)) return false;

  if (trigger.stateFilter && trigger.stateFilter !== event.state) return false;

  if (trigger.contextFilter && !event.context.includes(trigger.contextFilter)) return false;

  return true;
}

export async function findMatchingTriggers(event: ParsedEvent): Promise<EventTrigger[]> {
  const triggers = await getEnabledEventTriggers();
  return triggers.filter(t => matchesTrigger(t, event));
}