import { Plugin, decorators as d } from "knub";
import { GuildPersistedData, IPartialPersistData } from "../data/GuildPersistedData";
import intersection from "lodash.intersection";
import { Member, MemberOptions } from "eris";
import { GuildLogs } from "../data/GuildLogs";
import { LogType } from "../data/LogType";
import { stripObjectToScalars } from "../utils";

export class PersistPlugin extends Plugin {
  protected persistedData: GuildPersistedData;
  protected logs: GuildLogs;

  getDefaultOptions() {
    return {
      config: {
        persisted_roles: [],
        persist_nicknames: false,
        persist_voice_mutes: false
      }
    };
  }

  onLoad() {
    this.persistedData = new GuildPersistedData(this.guildId);
    this.logs = new GuildLogs(this.guildId);
  }

  @d.event("guildMemberRemove")
  onGuildMemberRemove(_, member: Member) {
    let persist = false;
    const persistData: IPartialPersistData = {};

    const persistedRoles = this.configValue("persisted_roles");
    if (persistedRoles.length) {
      const rolesToPersist = intersection(persistedRoles, member.roles);
      if (rolesToPersist.length) {
        persist = true;
        persistData.roles = rolesToPersist;
      }
    }

    if (this.configValue("persist_nicknames") && member.nick) {
      persist = true;
      persistData.nickname = member.nick;
    }

    if (this.configValue("persist_voice_mutes")) {
      persist = true;
      persistData.is_voice_muted = member.voiceState.mute;
    }

    if (persist) {
      this.persistedData.set(member.id, persistData);
    }
  }

  @d.event("guildMemberAdd")
  async onGuildMemberAdd(_, member: Member) {
    const persistedData = await this.persistedData.find(member.id);
    if (!persistedData) return;

    let restore = false;
    const toRestore: MemberOptions = {};

    const persistedRoles = this.configValue("persisted_roles");
    if (persistedRoles.length) {
      const rolesToRestore = intersection(persistedRoles, persistedData.roles);
      if (rolesToRestore.length) {
        restore = true;
        toRestore.roles = rolesToRestore;
      }
    }

    if (this.configValue("persist_nicknames") && persistedData.nickname) {
      restore = true;
      toRestore.nick = persistedData.nickname;
    }

    if (this.configValue("persist_voice_mutes") && persistedData.is_voice_muted) {
      restore = true;
      toRestore.mute = true;
    }

    if (restore) {
      await member.edit(toRestore, "Restored upon rejoin");
      this.logs.log(LogType.MEMBER_RESTORE, {
        member: stripObjectToScalars(member, ["user"])
      });
    }
  }
}