import { z } from "zod";

import { handleErrorsJson } from "@calcom/lib/errors";
import type { CalendarEvent } from "@calcom/types/Calendar";
import { CredentialPayload } from "@calcom/types/Credential";
import type { PartialReference } from "@calcom/types/EventManager";
import type { VideoApiAdapter, VideoCallData } from "@calcom/types/VideoApiAdapter";

import { getDailyAppKeys } from "./getDailyAppKeys";

/** @link https://docs.daily.co/reference/rest-api/rooms/create-room */
const dailyReturnTypeSchema = z.object({
  /** Long UID string ie: 987b5eb5-d116-4a4e-8e2c-14fcb5710966 */
  id: z.string(),
  /** Not a real name, just a random generated string ie: "ePR84NQ1bPigp79dDezz" */
  name: z.string(),
  api_created: z.boolean(),
  privacy: z.union([z.literal("private"), z.literal("public")]),
  /** https://api-demo.daily.co/ePR84NQ1bPigp79dDezz */
  url: z.string(),
  created_at: z.string(),
  config: z.object({
    /** Timestamps expressed in seconds, not in milliseconds */
    nbf: z.number().optional(),
    /** Timestamps expressed in seconds, not in milliseconds */
    exp: z.number(),
    enable_chat: z.boolean(),
    enable_knocking: z.boolean(),
    enable_prejoin_ui: z.boolean(),
    enable_new_call_ui: z.boolean(),
  }),
});

export interface DailyEventResult {
  id: string;
  name: string;
  api_created: boolean;
  privacy: string;
  url: string;
  created_at: string;
  config: Record<string, unknown>;
}

export interface DailyVideoCallData {
  type: string;
  id: string;
  password: string;
  url: string;
}

const meetingTokenSchema = z.object({
  token: z.string(),
});

/** @deprecated use metadata on index file */
export const FAKE_DAILY_CREDENTIAL: CredentialPayload & { invalid: boolean } = {
  id: +new Date().getTime(),
  type: "daily_video",
  key: { apikey: process.env.DAILY_API_KEY },
  userId: +new Date().getTime(),
  appId: "daily-video",
  invalid: false,
};

const fetcher = async (endpoint: string, init?: RequestInit | undefined) => {
  const { api_key } = await getDailyAppKeys();
  return fetch(`https://api.daily.co/v1${endpoint}`, {
    method: "GET",
    headers: {
      Authorization: "Bearer " + api_key,
      "Content-Type": "application/json",
      ...init?.headers,
    },
    ...init,
  }).then(handleErrorsJson);
};

function postToDailyAPI(endpoint: string, body: Record<string, any>) {
  return fetcher(endpoint, {
    method: "POST",
    body: JSON.stringify(body),
  });
}

const DailyVideoApiAdapter = (): VideoApiAdapter => {
  async function createOrUpdateMeeting(endpoint: string, event: CalendarEvent): Promise<VideoCallData> {
    if (!event.uid) {
      throw new Error("We need need the booking uid to create the Daily reference in DB");
    }
    const dailyEvent = await postToDailyAPI(endpoint, translateEvent(event)).then(
      dailyReturnTypeSchema.parse
    );
    const meetingToken = await postToDailyAPI("/meeting-tokens", {
      properties: { room_name: dailyEvent.name, is_owner: true },
    }).then(meetingTokenSchema.parse);

    return Promise.resolve({
      type: "daily_video",
      id: dailyEvent.name,
      password: meetingToken.token,
      url: dailyEvent.url,
    });
  }

  const translateEvent = (event: CalendarEvent) => {
    // Documentation at: https://docs.daily.co/reference#list-rooms
    // added a 1 hour buffer for room expiration
    const exp = Math.round(new Date(event.endTime).getTime() / 1000) + 60 * 60;
    const scalePlan = process.env.DAILY_SCALE_PLAN;

    if (scalePlan === "true") {
      return {
        privacy: "public",
        properties: {
          enable_new_call_ui: true,
          enable_prejoin_ui: true,
          enable_knocking: true,
          enable_screenshare: true,
          enable_chat: true,
          exp: exp,
          enable_recording: "local",
        },
      };
    }
    return {
      privacy: "public",
      properties: {
        enable_new_call_ui: true,
        enable_prejoin_ui: true,
        enable_knocking: true,
        enable_screenshare: true,
        enable_chat: true,
        exp: exp,
      },
    };
  };

  return {
    /** Daily doesn't need to return busy times, so we return empty */
    getAvailability: () => {
      return Promise.resolve([]);
    },
    createMeeting: async (event: CalendarEvent): Promise<VideoCallData> =>
      createOrUpdateMeeting("/rooms", event),
    deleteMeeting: async (uid: string): Promise<void> => {
      await fetcher(`/rooms/${uid}`, { method: "DELETE" });
      return Promise.resolve();
    },
    updateMeeting: (bookingRef: PartialReference, event: CalendarEvent): Promise<VideoCallData> =>
      createOrUpdateMeeting(`/rooms/${bookingRef.uid}`, event),
  };
};

export default DailyVideoApiAdapter;