import { applicationId } from "../../bot.ts";
import { rest } from "../../rest/rest.ts";
import { structures } from "../../structures/mod.ts";
import { DiscordenoEditWebhookMessage } from "../../types/discordeno/edit_webhook_message.ts";
import { DiscordAllowedMentionsTypes } from "../../types/messages/allowed_mentions_types.ts";
import { DiscordMessage } from "../../types/messages/message.ts";
import { Errors } from "../../types/misc/errors.ts";
import { endpoints } from "../../util/constants.ts";

/** To edit your response to a slash command. If a messageId is not provided it will default to editing the original response. */
export async function editSlashResponse(
  token: string,
  options: DiscordenoEditWebhookMessage,
) {
  if (options.content && options.content.length > 2000) {
    throw Error(Errors.MESSAGE_MAX_LENGTH);
  }

  if (options.embeds && options.embeds.length > 10) {
    options.embeds.splice(10);
  }

  if (options.allowedMentions) {
    if (options.allowedMentions.users?.length) {
      if (
        options.allowedMentions.parse.includes(
          DiscordAllowedMentionsTypes.UserMentions,
        )
      ) {
        options.allowedMentions.parse = options.allowedMentions.parse.filter(
          (p) => p !== "users",
        );
      }

      if (options.allowedMentions.users.length > 100) {
        options.allowedMentions.users = options.allowedMentions.users.slice(
          0,
          100,
        );
      }
    }

    if (options.allowedMentions.roles?.length) {
      if (
        options.allowedMentions.parse.includes(
          DiscordAllowedMentionsTypes.RoleMentions,
        )
      ) {
        options.allowedMentions.parse = options.allowedMentions.parse.filter(
          (p) => p !== "roles",
        );
      }

      if (options.allowedMentions.roles.length > 100) {
        options.allowedMentions.roles = options.allowedMentions.roles.slice(
          0,
          100,
        );
      }
    }
  }

  const result = await rest.runMethod(
    "patch",
    options.messageId
      ? endpoints.WEBHOOK_MESSAGE(applicationId, token, options.messageId)
      : endpoints.INTERACTION_ORIGINAL_ID_TOKEN(applicationId, token),
    options,
  );

  // If the original message was edited, this will not return a message
  if (!options.messageId) return result;

  const message = await structures.createMessageStruct(
    result as DiscordMessage,
  );
  return message;
}