import { eventHandlers } from "../../bot.ts";
import {
  DiscordPayload,
  GuildRoleDeletePayload,
  GuildRolePayload,
} from "../../types/mod.ts";
import { structures } from "../structures/mod.ts";
import { cacheHandlers } from "./cache.ts";

export async function handleInternalGuildRoleCreate(data: DiscordPayload) {
  if (data.t !== "GUILD_ROLE_CREATE") return;

  const payload = data.d as GuildRolePayload;
  const guild = await cacheHandlers.get("guilds", payload.guild_id);
  if (!guild) return;

  const role = await structures.createRoleStruct(payload.role);
  guild.roles = guild.roles.set(payload.role.id, role);
  await cacheHandlers.set("guilds", payload.guild_id, guild);

  eventHandlers.roleCreate?.(guild, role);
}

export async function handleInternalGuildRoleDelete(data: DiscordPayload) {
  if (data.t !== "GUILD_ROLE_DELETE") return;

  const payload = data.d as GuildRoleDeletePayload;
  const guild = await cacheHandlers.get("guilds", payload.guild_id);
  if (!guild) return;

  const cachedRole = guild.roles.get(payload.role_id)!;
  guild.roles.delete(payload.role_id);

  if (cachedRole) eventHandlers.roleDelete?.(guild, cachedRole);

  // For bots without GUILD_MEMBERS member.roles is never updated breaking permissions checking.
  cacheHandlers.forEach("members", (member) => {
    // Not in the relevant guild so just skip.
    if (!member.guilds.has(guild.id)) return;

    member.guilds.forEach((g) => {
      // Member does not have this role
      if (!g.roles.includes(payload.role_id)) return;
      // Remove this role from the members cache
      g.roles = g.roles.filter((id) => id !== payload.role_id);
      cacheHandlers.set("members", member.id, member);
    });
  });
}

export async function handleInternalGuildRoleUpdate(data: DiscordPayload) {
  if (data.t !== "GUILD_ROLE_UPDATE") return;

  const payload = data.d as GuildRolePayload;
  const guild = await cacheHandlers.get("guilds", payload.guild_id);
  if (!guild) return;

  const cachedRole = guild.roles.get(payload.role.id);
  if (!cachedRole) return;

  const role = await structures.createRoleStruct(payload.role);
  guild.roles.set(payload.role.id, role);
  await cacheHandlers.set("guilds", guild.id, guild);

  eventHandlers.roleUpdate?.(guild, role, cachedRole);
}