import { database } from "~/database/context";
import { eq } from "drizzle-orm";
import * as schema from "~/database/schema";
import { findSportsSeasonsByStatus } from "~/models/sports-season";
import { syncStandings } from "~/services/standings-sync";
import { runSportsSeasonSimulation } from "~/services/simulations/runner";
import { requireCronSecret } from "~/lib/cron-auth";

export async function action({ request }: { request: Request }) {
  requireCronSecret(request);

  const activeSeasons = await findSportsSeasonsByStatus("active");

  const synced: string[] = [];
  const unchanged: string[] = [];
  const simulated: string[] = [];
  const syncErrors: { id: string; error: string }[] = [];
  const simErrors: { id: string; error: string }[] = [];

  for (const season of activeSeasons) {
    let changed = false;
    try {
      const result = await syncStandings(season.id);
      changed = result.changed;
      if (changed) {
        synced.push(season.id);
      } else {
        unchanged.push(season.id);
      }
    } catch (err) {
      // Sports without a sync adapter (F1, IndyCar, etc.) throw — skip gracefully
      syncErrors.push({ id: season.id, error: err instanceof Error ? err.message : String(err) });
      continue;
    }

    if (!changed) continue;

    // Only simulate if standings changed since last simulation
    const current = await database()
      .select({ standingsLastChangedAt: schema.sportsSeasons.standingsLastChangedAt, lastSimulatedAt: schema.sportsSeasons.lastSimulatedAt })
      .from(schema.sportsSeasons)
      .where(eq(schema.sportsSeasons.id, season.id))
      .then((rows) => rows[0]);

    const needsSim =
      current?.standingsLastChangedAt &&
      (!current.lastSimulatedAt || current.standingsLastChangedAt > current.lastSimulatedAt);

    if (!needsSim) continue;

    try {
      await runSportsSeasonSimulation(season.id);
      await database()
        .update(schema.sportsSeasons)
        .set({ lastSimulatedAt: new Date() })
        .where(eq(schema.sportsSeasons.id, season.id));
      simulated.push(season.id);
    } catch (err) {
      // Seasons without a simulator config or that fail readiness checks throw — skip gracefully
      simErrors.push({ id: season.id, error: err instanceof Error ? err.message : String(err) });
    }
  }

  const hasErrors = syncErrors.length > 0 || simErrors.length > 0;
  const hasSuccess = synced.length > 0 || unchanged.length > 0;
  const status = hasErrors && !hasSuccess ? 500 : 200;

  return Response.json(
    { synced, unchanged, simulated, syncErrors, simErrors },
    { status }
  );
}