import { Hono } from "hono";
import { env } from "hono/adapter";
import mapKeys from "lodash.mapkeys";
import { DateTime } from "luxon";

import { Case, changeStringCase } from "~/libs/changeStringCase";
import type { AdminSdkCredentials } from "~/libs/fcm/getGoogleAuthToken";
import { sendFcmMessage } from "~/libs/fcm/sendFcmMessage";
import { verifyQstashHeader } from "~/libs/qstash/verifyQstashHeader";
import { readEnvVariable } from "~/libs/readEnvVariable";
import type { Env } from "~/types/env";
import { ErrorResponse, SuccessResponse } from "~/types/schema";

import { getUpcomingTitlesFromAnilist } from "./anilist";

const app = new Hono();

app.post("/", async (c) => {
  if (
    !(await verifyQstashHeader(
      env<Env, typeof c>(c, "workerd"),
      c.req.path,
      c.req.header("Upstash-Signature"),
      await c.req.text(),
    ))
  ) {
    return c.json(ErrorResponse, { status: 401 });
  }

  const titles = await getUpcomingTitlesFromAnilist(
    env<Env, typeof c>(c, "workerd"),
  );

  await Promise.all(
    titles.map(async (title) => {
      const titleName =
        title.media.title?.userPreferred ??
        title.media.title?.english ??
        "Unknown Title";

      return sendFcmMessage(
        mapKeys(
          readEnvVariable<AdminSdkCredentials>(c.env, "ADMIN_SDK_JSON"),
          (_, key) => changeStringCase(key, Case.snake_case, Case.camelCase),
        ) as unknown as AdminSdkCredentials,
        {
          topic: "newTitles",
          data: {
            type: "new_title",
            aniListId: title.media.id.toString(),
            title: titleName,
            airingAt: title.airingAt.toString(),
          },
          notification: {
            title: "New Series Alert",
            body: `${titleName} will be released ${DateTime.fromSeconds(title.airingAt).toRelative({ unit: ["days", "hours", "minutes"] })}`,
            image:
              title.media.coverImage?.medium ??
              title.media.coverImage?.large ??
              title.media.coverImage?.extraLarge ??
              undefined,
          },
          android: {
            notification: {
              click_action: "HANDLE_FCM_NOTIFICATION",
            },
          },
        },
      );
    }),
  );

  return c.json(SuccessResponse, 200);
});

export default app;