import { ChatInputCommandInteraction, TextChannel } from "discord.js";
import { Config } from "@systems/config";
import { hasOfficerRole } from "@systems/users";
import { polls, updatePollMessage } from "@systems/poll";
import { persist } from "@systems/pollPersistence";
import { VoteEntry, PollState } from "@types";
import { Discord } from "@discord";
import { replyAndDelete } from "@utils";

interface FoundEntry {
  slot:  number;
  state: PollState;
  entry: VoteEntry;
}

function findYesEntry(userKey: string): FoundEntry | null {
  const slot = [...polls.keys()][0];
  if (slot === undefined) return null;
  const state = polls.get(slot)!;
  const entry = [...state.yes.values()].find((e) => e.userKey === userKey);
  return entry ? { slot, state, entry } : null;
}

export async function handleSleepCheckSet(interaction: ChatInputCommandInteraction): Promise<void> {
  const member = await interaction.guild!.members.fetch(interaction.user.id);
  if (!hasOfficerRole(member, Config.get({ section: "roles", key: "officer" }))) {
    return void replyAndDelete(interaction, "❌ Officer only.", true);
  }

  const opts    = Discord.Interaction.options(interaction);
  const userKey = opts.string({ key: "name", required: true })!;

  const found = findYesEntry(userKey);
  if (!found) {
    return void replyAndDelete(interaction, `❌ **${userKey}** hasn't voted Yes in the active poll.`, true);
  }

  found.entry.sleepCheckPending = true;
  persist.save(polls);

  const channel = await interaction.client.channels.fetch(
    Config.get({ section: "channels", key: "poll" })
  ) as TextChannel;
  await updatePollMessage(channel, found.slot, undefined, found.state.scoreSubmitOpen === true);

  return void replyAndDelete(interaction, `💤 **${userKey}** flagged for sleep check. The confirmation DM goes out at the usual scheduled time.`, true);
}

export async function handleSleepCheckClear(interaction: ChatInputCommandInteraction): Promise<void> {
  const member = await interaction.guild!.members.fetch(interaction.user.id);
  if (!hasOfficerRole(member, Config.get({ section: "roles", key: "officer" }))) {
    return void replyAndDelete(interaction, "❌ Officer only.", true);
  }

  const opts    = Discord.Interaction.options(interaction);
  const userKey = opts.string({ key: "name", required: true })!;

  const found = findYesEntry(userKey);
  if (!found) {
    return void replyAndDelete(interaction, `❌ **${userKey}** hasn't voted Yes in the active poll.`, true);
  }
  if (!found.entry.sleepCheckPending) {
    return void replyAndDelete(interaction, `ℹ️ **${userKey}** doesn't have a pending sleep check.`, true);
  }

  found.entry.sleepCheckPending = false;
  persist.save(polls);

  const channel = await interaction.client.channels.fetch(
    Config.get({ section: "channels", key: "poll" })
  ) as TextChannel;
  await updatePollMessage(channel, found.slot, undefined, found.state.scoreSubmitOpen === true);

  return void replyAndDelete(interaction, `✅ Sleep check cleared for **${userKey}**.`, true);
}

export const SleepCheckCommands = {
  set:   handleSleepCheckSet,
  clear: handleSleepCheckClear,
};