import {
  FatalError,
  RetryableError,
  getWorkflowMetadata,
  sleep,
} from "workflow";
import { admin, required } from "./supabase";
import {
  DiscordClient,
  DiscordDeliveryError,
  discordConfiguration,
} from "./discord-client";

export async function cleanupClosedDiscordParty(event: string, claim: string) {
  "use workflow";
  const run = getWorkflowMetadata().workflowRunId;
  try {
    const deadline = await markClosed(event);
    if (deadline) {
      await sleep(new Date(deadline));
      await deleteClosed(event);
    }
  } catch {
    await releaseFailedCleanup(event, claim, run);
    throw new Error(
      "Discord party cleanup failed; the saved announcement can be retried.",
    );
  }
}

async function record(event: string) {
  const result = await admin()
    .from("discord_announcements")
    .select("*")
    .eq("id", event)
    .maybeSingle();
  if (result.error) required(result);
  const job = result.data;
  return job?.kind === "party" &&
    job.state === "sent" &&
    job.closed_at &&
    !job.deleted_at &&
    job.channel_id &&
    job.message_id
    ? job
    : null;
}

function client() {
  const config = discordConfiguration(process.env);
  if (!config.token || !config.origin)
    throw new FatalError(
      "Configure the Discord bot token and public site URL.",
    );
  return { client: new DiscordClient(config.token), origin: config.origin! };
}

function retry(error: unknown): never {
  if (error instanceof DiscordDeliveryError) {
    if (error.permanent) throw new FatalError(error.message);
    throw new RetryableError(error.message, {
      retryAfter: error.retryAfter * 1000,
    });
  }
  throw new RetryableError("Discord cleanup could not be confirmed.", {
    retryAfter: "30s",
  });
}

async function markClosed(event: string): Promise<string | null> {
  "use step";
  try {
    const job = await record(event);
    if (!job) return null;
    if (job.delete_after) return job.delete_after;
    const setup = client();
    const exists = await setup.client.closeParty(
      job.channel_id!,
      job.message_id!,
      setup.origin,
      job.target_id,
    );
    if (!exists) {
      required(
        await admin()
          .from("discord_announcements")
          .update({ deleted_at: new Date().toISOString(), cleanup_error: null })
          .eq("id", event)
          .select("id")
          .single(),
      );
      return null;
    }
    const result = await admin().rpc("mark_discord_party_closed", {
      p_event: event,
    });
    if (result.error) required(result);
    return result.data;
  } catch (error) {
    if (error instanceof FatalError || error instanceof RetryableError)
      throw error;
    retry(error);
  }
}
markClosed.maxRetries = 10;

async function deleteClosed(event: string) {
  "use step";
  try {
    const job = await record(event);
    if (!job) return;
    if (!job.delete_after)
      throw new FatalError("The closed notice has not been confirmed.");
    const deadline = new Date(job.delete_after);
    if (deadline.getTime() > Date.now())
      throw new RetryableError("Keep the five-minute grace period.", {
        retryAfter: deadline,
      });
    await client().client.remove(job.channel_id!, job.message_id!);
    required(
      await admin()
        .from("discord_announcements")
        .update({ deleted_at: new Date().toISOString(), cleanup_error: null })
        .eq("id", event)
        .select("id")
        .single(),
    );
  } catch (error) {
    if (error instanceof FatalError || error instanceof RetryableError)
      throw error;
    retry(error);
  }
}
deleteClosed.maxRetries = 10;

async function releaseFailedCleanup(event: string, claim: string, run: string) {
  "use step";
  required(
    await admin()
      .from("discord_announcements")
      .update({
        cleanup_run_id: null,
        cleanup_lease_until: new Date(Date.now() + 300000).toISOString(),
        cleanup_error:
          "Party cleanup failed. Check Discord setup and retry saved announcements.",
      })
      .eq("id", event)
      .in("cleanup_run_id", [claim, run])
      .is("deleted_at", null)
      .select("id"),
  );
  console.error("Discord party cleanup failed", { event, run });
}
releaseFailedCleanup.maxRetries = 10;