import {
  ActionRowBuilder,
  AttachmentBuilder,
  ButtonBuilder,
  ButtonStyle,
  CacheType,
  ChatInputCommandInteraction,
  InteractionReplyOptions,
} from 'discord.js';
import { InteractionRawReturnable, commands } from '..';
import { UserError } from '../../../core/blitzkit/userError';
import { buttonLink } from '../../../core/discord/buttonLink';
import { embedWarning } from '../../../core/discord/embedWarning';
import { normalizeInteractionReturnable } from '../../../core/discord/normalizeInteractionReturnable';
import { psa } from '../../../core/discord/psa';
import { translator } from '../../../core/localization/translator';
import { Writeable } from '../../../types/writable';

export async function handleChatInputCommand(
  interaction: ChatInputCommandInteraction<CacheType>,
) {
  const awaitedCommands = await commands;
  const registry = awaitedCommands[interaction.commandName];

  await interaction.deferReply();

  try {
    const returnable = await registry.handler(interaction);

    if (registry.handlesInteraction) return;

    const chunks: InteractionRawReturnable[][] = [[]];

    (Array.isArray(returnable) ? returnable : [returnable]).forEach(
      (object) => {
        if (typeof object === 'string') {
          chunks.push([object]);
        } else chunks.at(-1)?.push(object!);
      },
    );

    let index = 0;
    for (const chunk of chunks.filter((chunk) => chunk.length > 0)) {
      const reply = await normalizeInteractionReturnable(chunk);

      if (
        psa.data &&
        !psa.data.secret &&
        (psa.data.commands === undefined ||
          psa.data.commands.includes(interaction.commandName))
      ) {
        if (psa.data.type === undefined || psa.data.type === 'embed') {
          if (!reply.embeds) reply.embeds = [];

          const embed = embedWarning(psa.data.title, psa.data.description);

          if (psa.data.image) embed.setImage(psa.data.image);
          (reply.embeds as Writeable<typeof reply.embeds>).push(embed);
        } else if (psa.data.type === 'image') {
          if (!reply.files) reply.files = [];
          (reply.files as Writeable<typeof reply.files>).push(
            new AttachmentBuilder(psa.data.image),
          );
          reply.content = reply.content ?? psa.data.title;
        }

        if (psa.data.links) {
          if (!reply.components?.[0]) {
            reply.components = [new ActionRowBuilder<ButtonBuilder>()];
          }

          (
            reply.components[0] as ActionRowBuilder<ButtonBuilder>
          ).addComponents(
            psa.data.links.map(({ title, url }) => buttonLink(url, title)),
          );
        }
      }

      if (index === 0) {
        await interaction.editReply(reply);
      } else {
        await interaction.followUp(reply);
      }

      if (
        psa.data &&
        psa.data.secret &&
        (psa.data.commands === undefined ||
          psa.data.commands.includes(interaction.commandName))
      ) {
        const followUp: InteractionReplyOptions = {
          ephemeral: true,
        };

        if (psa.data.type === undefined || psa.data.type === 'embed') {
          if (!followUp.embeds) followUp.embeds = [];

          const embed = embedWarning(psa.data.title, psa.data.description);

          if (psa.data.image) embed.setImage(psa.data.image);
          (followUp.embeds as Writeable<typeof followUp.embeds>).push(embed);
        } else if (psa.data.type === 'image') {
          if (!followUp.files) followUp.files = [];
          (followUp.files as Writeable<typeof followUp.files>).push(
            new AttachmentBuilder(psa.data.image),
          );
          followUp.content = followUp.content ?? psa.data.title;
        }

        if (psa.data.links) {
          if (!followUp.components?.[0]) {
            followUp.components = [new ActionRowBuilder<ButtonBuilder>()];
          }

          (
            followUp.components[0] as ActionRowBuilder<ButtonBuilder>
          ).addComponents(
            psa.data.links.map(({ title, url }) => buttonLink(url, title)),
          );
        }

        interaction.followUp(followUp);
      }

      index++;
    }
  } catch (error) {
    const { strings } = translator(interaction.locale);

    const components = [
      new ActionRowBuilder<ButtonBuilder>().addComponents(
        new ButtonBuilder()
          .setLabel(strings.bot.common.errors.get_help)
          .setURL('https://discord.gg/nDt7AjGJQH')
          .setStyle(ButtonStyle.Link),
      ),
    ];
    if (error instanceof UserError) {
      interaction.editReply({
        content: error.message,
        components,
      });
    } else {
      console.error(interaction.commandName, error);
      interaction.editReply({
        content: strings.bot.common.errors.uncaught_error,
        components,
      });
    }
  }
}