import "server-only";
import { randomUUID } from "node:crypto";
import { after } from "next/server";
import { admin, required } from "./supabase";
import {
  announcementMessage,
  discordConfiguration,
  DiscordClient,
} from "./discord-client";
import { deliverDiscordAnnouncement } from "./discord-delivery";
import { scheduleDiscordCleanup } from "./discord-cleanup-scheduler";
import type {
  DiscordAnnouncement,
  DiscordKind,
  DiscordStatus,
  PartyAnnouncement,
} from "@/shared/discord";
import type { RoomView } from "@/shared/multiplayer";
const configuration = () => discordConfiguration(process.env);
export function discordPartyReady() {
  const config = configuration();
  return !!(config.token && config.origin && config.partyChannel);
}
async function announcementSource(
  job: DiscordAnnouncement,
): Promise<Parameters<typeof announcementMessage>[3] | null> {
  const db = admin();
  if (job.kind === "map") {
    const row = await db
      .from("datasets")
      .select("id,name,owner_id,panorama_count")
      .eq("id", job.target_id)
      .eq("state", "published")
      .is("parent_dataset_id", null)
      .is("imported_from_id", null)
      .maybeSingle();
    if (row.error) required(row);
    if (!row.data) return null;
    const owner = row.data.owner_id
      ? await db
          .from("profiles")
          .select("display_name")
          .eq("id", row.data.owner_id)
          .maybeSingle()
      : { data: null, error: null };
    if (owner.error) required(owner);
    return {
      id: row.data.id,
      name: row.data.name,
      owner: owner.data?.display_name ?? "Explorer",
      locations: row.data.panorama_count,
    };
  }
  const found = await db
    .from("multiplayer_rooms")
    .select("*")
    .eq("id", job.target_id)
    .maybeSingle();
  if (found.error) required(found);
  const room = found.data;
  if (
    !room ||
    room.status !== "lobby" ||
    Date.parse(room.created_at) < Date.now() - 86400000 ||
    Date.parse(job.created_at) < Date.now() - 3600000
  )
    return null;
  const revision = required(
    await db
      .from("revisions")
      .select("dataset_id")
      .eq("id", room.revision_id)
      .single(),
  );
  const map = await db
    .from("datasets")
    .select("name")
    .eq("id", revision.dataset_id)
    .eq("state", "published")
    .is("parent_dataset_id", null)
    .is("imported_from_id", null)
    .maybeSingle();
  if (map.error) required(map);
  if (!map.data) return null;
  const players = required(
    await db
      .from("multiplayer_players")
      .select("id,display_name,account_id")
      .eq("room_id", room.id)
      .eq("has_left", false),
  );
  const host = players.find((p) => p.id === room.host_player_id);
  if (!host || players.length >= room.player_limit) return null;
  let hostName = host.display_name;
  if (host.account_id) {
    const profile = required(
      await db
        .from("profiles")
        .select("display_name")
        .eq("id", host.account_id)
        .single(),
    );
    hostName = profile.display_name;
  }
  const difficultySettings =
    room.difficulty_settings &&
    typeof room.difficulty_settings === "object" &&
    !Array.isArray(room.difficulty_settings)
      ? room.difficulty_settings
      : null;
  return {
    id: room.id,
    name: map.data.name,
    owner: hostName,
    difficulty:
      typeof difficultySettings?.name === "string"
        ? difficultySettings.name
        : room.difficulty,
    players: players.length,
    limit: room.player_limit,
  };
}
export async function dispatchDiscordAnnouncements(target?: string) {
  const config = configuration();
  if (!config.token || !config.origin) return;
  await scheduleDiscordCleanup(target);
  const kinds: DiscordKind[] = [];
  if (config.mapChannel) kinds.push("map");
  if (config.partyChannel) kinds.push("party");
  if (!kinds.length) return;
  const db = admin(),
    worker = randomUUID();
  const jobs = required(
    await db.rpc("claim_discord_announcements", {
      p_worker: worker,
      p_kinds: kinds,
      p_target: target ?? null,
    }),
  );
  const client = new DiscordClient(config.token);
  for (const job of jobs) {
    await deliverDiscordAnnouncement(job, {
      origin: config.origin,
      channel: job.kind === "map" ? config.mapChannel! : config.partyChannel!,
      client,
      load: () => announcementSource(job),
      finish: async (patch) => {
        required(
          await db
            .from("discord_announcements")
            .update(patch)
            .eq("id", job.id)
            .eq("lease_owner", worker)
            .select("id")
            .single(),
        );
      },
    });
  }
  await scheduleDiscordCleanup(target);
}
export function discordAfterResponse(target?: string) {
  const c = configuration();
  if (!c.token || !c.origin || (!c.mapChannel && !c.partyChannel)) return;
  after(async () => {
    try {
      await dispatchDiscordAnnouncements(target);
    } catch {
      console.error(
        "Discord delivery paused; saved announcements remain available for retry.",
      );
    }
  });
}
export async function partyAnnouncement(
  room: RoomView,
): Promise<PartyAnnouncement | undefined> {
  if (!room.you || room.you !== room.hostId) return undefined;
  const db = admin();
  const result = await db
    .from("discord_announcements")
    .select("state,next_attempt_at,lease_until")
    .eq("kind", "party")
    .eq("target_id", room.id)
    .maybeSingle();
  if (result.error) required(result);
  const map = await db
    .from("datasets")
    .select("state,imported_from_id,parent_dataset_id")
    .eq("id", room.datasetId)
    .maybeSingle();
  if (map.error) required(map);
  const publicMap =
    map.data?.state === "published" &&
    !map.data.imported_from_id &&
    !map.data.parent_dataset_id;
  if (
    result.data &&
    ["pending", "sending"].includes(result.data.state) &&
    Date.parse(result.data.next_attempt_at) <= Date.now() &&
    (!result.data.lease_until ||
      Date.parse(result.data.lease_until) <= Date.now())
  )
    discordAfterResponse(room.id);
  return {
    available: discordPartyReady() && !!publicMap,
    state: result.data?.state ?? null,
  };
}
export async function discordStatus(): Promise<DiscordStatus> {
  const c = configuration();
  const count = async (states: DiscordAnnouncement["state"][]) => {
    let query = admin()
      .from("discord_announcements")
      .select("id", { count: "exact", head: true });
    query = states.includes("failed")
      ? query.or("state.eq.failed,cleanup_error.not.is.null")
      : query.in("state", states);
    const r = await query;
    if (r.error) required(r);
    return r.count ?? 0;
  };
  const [pending, failed, sent] = await Promise.all([
    count(["pending", "sending"]),
    count(["failed"]),
    count(["sent"]),
  ]);
  discordAfterResponse();
  return {
    botConfigured: !!c.token,
    publicUrlConfigured: !!c.origin,
    mapsConfigured: !!c.mapChannel,
    partiesConfigured: !!c.partyChannel,
    pending,
    failed,
    sent,
  };
}
export async function checkDiscordSetup() {
  const c = configuration();
  if (!c.token || !c.origin || (!c.mapChannel && !c.partyChannel))
    throw new Error(
      "Configure the Discord bot token, public site URL, and at least one channel ID.",
    );
  return new DiscordClient(c.token).check(
    [c.mapChannel, c.partyChannel].filter((v): v is string => !!v),
  );
}