import { stringify } from "query-string";

import { DataProvider, DeleteParams, Identifier, Options, RaRecord, fetchUtils } from "react-admin";

// Adds the access token to all requests
const jsonClient = (url: string, options: Options = {}) => {
  const token = localStorage.getItem("access_token");
  console.log("httpClient " + url);
  if (token != null) {
    options.user = {
      authenticated: true,
      token: `Bearer ${token}`,
    };
  }
  return fetchUtils.fetchJson(url, options);
};

const mxcUrlToHttp = (mxcUrl: string) => {
  const homeserver = localStorage.getItem("base_url");
  const re = /^mxc:\/\/([^/]+)\/(\w+)/;
  const ret = re.exec(mxcUrl);
  console.log("mxcClient " + ret);
  if (ret == null) return null;
  const serverName = ret[1];
  const mediaId = ret[2];
  return `${homeserver}/_matrix/media/r0/thumbnail/${serverName}/${mediaId}?width=24&height=24&method=scale`;
};

interface Room {
  room_id: string;
  name?: string;
  canonical_alias?: string;
  avatar_url?: string;
  joined_members: number;
  joined_local_members: number;
  version: number;
  creator: string;
  encryption?: string;
  federatable: boolean;
  public: boolean;
  join_rules: "public" | "knock" | "invite" | "private";
  guest_access?: "can_join" | "forbidden";
  history_visibility: "invited" | "joined" | "shared" | "world_readable";
  state_events: number;
  room_type?: string;
}

interface RoomState {
  age: number;
  content: {
    alias?: string;
  };
  event_id: string;
  origin_server_ts: number;
  room_id: string;
  sender: string;
  state_key: string;
  type: string;
  user_id: string;
  unsigned: {
    age?: number;
  };
}

interface ForwardExtremity {
  event_id: string;
  state_group: number;
  depth: number;
  received_ts: number;
}

interface EventReport {
  id: number;
  received_ts: number;
  room_id: string;
  name: string;
  event_id: string;
  user_id: string;
  reason?: string;
  score?: number;
  sender: string;
  canonical_alias?: string;
}

interface Threepid {
  medium: string;
  address: string;
  added_at: number;
  validated_at: number;
}

interface ExternalId {
  auth_provider: string;
  external_id: string;
}

interface User {
  name: string;
  displayname?: string;
  threepids: Threepid[];
  avatar_url?: string;
  is_guest: 0 | 1;
  admin: 0 | 1;
  deactivated: 0 | 1;
  erased: boolean;
  shadow_banned: 0 | 1;
  creation_ts: number;
  appservice_id?: string;
  consent_server_notice_sent?: string;
  consent_version?: string;
  consent_ts?: number;
  external_ids: ExternalId[];
  user_type?: string;
  locked: boolean;
}

interface Device {
  device_id: string;
  display_name?: string;
  last_seen_ip?: string;
  last_seen_user_agent?: string;
  last_seen_ts?: number;
  user_id: string;
}

interface Connection {
  ip: string;
  last_seen: number;
  user_agent: string;
}

interface Whois {
  user_id: string;
  devices: Record<
    string,
    {
      sessions: {
        connections: Connection[];
      }[];
    }
  >;
}

interface Pusher {
  app_display_name: string;
  app_id: string;
  data: {
    url?: string;
    format: string;
  };
  url: string;
  format: string;
  device_display_name: string;
  profile_tag: string;
  kind: string;
  lang: string;
  pushkey: string;
}

interface UserMedia {
  created_ts: number;
  last_access_ts?: number;
  media_id: string;
  media_length: number;
  media_type: string;
  quarantined_by?: string;
  safe_from_quarantine: boolean;
  upload_name?: string;
}

interface UserMediaStatistic {
  displayname: string;
  media_count: number;
  media_length: number;
  user_id: string;
}

interface RegistrationToken {
  token: string;
  uses_allowed: number;
  pending: number;
  completed: number;
  expiry_time?: number;
}

interface RaServerNotice {
  id: string;
  body: string;
}

interface Destination {
  destination: string;
  retry_last_ts: number;
  retry_interval: number;
  failure_ts: number;
  last_successful_stream_ordering?: number;
}

interface DestinationRoom {
  room_id: string;
  stream_ordering: number;
}

const resourceMap = {
  users: {
    path: "/_synapse/admin/v2/users",
    map: (u: User) => ({
      ...u,
      id: u.name,
      avatar_src: u.avatar_url ? mxcUrlToHttp(u.avatar_url) : undefined,
      is_guest: !!u.is_guest,
      admin: !!u.admin,
      deactivated: !!u.deactivated,
      // need timestamp in milliseconds
      creation_ts_ms: u.creation_ts * 1000,
    }),
    data: "users",
    total: json => json.total,
    create: (data: RaRecord) => ({
      endpoint: `/_synapse/admin/v2/users/@${encodeURIComponent(data.id)}:${localStorage.getItem("home_server")}`,
      body: data,
      method: "PUT",
    }),
    delete: (params: DeleteParams) => ({
      endpoint: `/_synapse/admin/v1/deactivate/${encodeURIComponent(params.id)}`,
      body: { erase: true },
      method: "POST",
    }),
  },
  rooms: {
    path: "/_synapse/admin/v1/rooms",
    map: (r: Room) => ({
      ...r,
      id: r.room_id,
      alias: r.canonical_alias,
      members: r.joined_members,
      is_encrypted: !!r.encryption,
      federatable: !!r.federatable,
      public: !!r.public,
    }),
    data: "rooms",
    total: json => json.total_rooms,
    delete: (params: DeleteParams) => ({
      endpoint: `/_synapse/admin/v2/rooms/${params.id}`,
      body: { block: false },
    }),
  },
  reports: {
    path: "/_synapse/admin/v1/event_reports",
    map: (er: EventReport) => ({ ...er }),
    data: "event_reports",
    total: json => json.total,
  },
  devices: {
    map: (d: Device) => ({
      ...d,
      id: d.device_id,
    }),
    data: "devices",
    total: json => json.total,
    reference: (id: Identifier) => ({
      endpoint: `/_synapse/admin/v2/users/${encodeURIComponent(id)}/devices`,
    }),
    delete: (params: DeleteParams) => ({
      endpoint: `/_synapse/admin/v2/users/${encodeURIComponent(params.previousData.user_id)}/devices/${params.id}`,
    }),
  },
  connections: {
    path: "/_synapse/admin/v1/whois",
    map: (c: Whois) => ({
      ...c,
      id: c.user_id,
    }),
    data: "connections",
  },
  room_members: {
    map: (m: string) => ({
      id: m,
    }),
    reference: (id: Identifier) => ({
      endpoint: `/_synapse/admin/v1/rooms/${id}/members`,
    }),
    data: "members",
    total: json => json.total,
  },
  room_state: {
    map: (rs: RoomState) => ({
      ...rs,
      id: rs.event_id,
    }),
    reference: (id: Identifier) => ({
      endpoint: `/_synapse/admin/v1/rooms/${id}/state`,
    }),
    data: "state",
    total: json => json.state.length,
  },
  pushers: {
    map: (p: Pusher) => ({
      ...p,
      id: p.pushkey,
    }),
    reference: (id: Identifier) => ({
      endpoint: `/_synapse/admin/v1/users/${encodeURIComponent(id)}/pushers`,
    }),
    data: "pushers",
    total: json => json.total,
  },
  joined_rooms: {
    map: (jr: string) => ({
      id: jr,
    }),
    reference: (id: Identifier) => ({
      endpoint: `/_synapse/admin/v1/users/${encodeURIComponent(id)}/joined_rooms`,
    }),
    data: "joined_rooms",
    total: json => json.total,
  },
  users_media: {
    map: (um: UserMedia) => ({
      ...um,
      id: um.media_id,
    }),
    reference: (id: Identifier) => ({
      endpoint: `/_synapse/admin/v1/users/${encodeURIComponent(id)}/media`,
    }),
    data: "media",
    total: json => json.total,
    delete: (params: DeleteParams) => ({
      endpoint: `/_synapse/admin/v1/media/${localStorage.getItem("home_server")}/${params.id}`,
    }),
  },
  delete_media: {
    delete: (params: DeleteParams) => ({
      endpoint: `/_synapse/admin/v1/media/${localStorage.getItem(
        "home_server"
      )}/delete?before_ts=${params.meta.before_ts}&size_gt=${
        params.meta.size_gt
      }&keep_profiles=${params.meta.keep_profiles}`,
      method: "POST",
    }),
  },
  protect_media: {
    map: (pm: UserMedia) => ({ id: pm.media_id }),
    create: (params: UserMedia) => ({
      endpoint: `/_synapse/admin/v1/media/protect/${params.media_id}`,
      method: "POST",
    }),
    delete: (params: DeleteParams) => ({
      endpoint: `/_synapse/admin/v1/media/unprotect/${params.id}`,
      method: "POST",
    }),
  },
  quarantine_media: {
    map: (qm: UserMedia) => ({ id: qm.media_id }),
    create: (params: UserMedia) => ({
      endpoint: `/_synapse/admin/v1/media/quarantine/${localStorage.getItem("home_server")}/${params.media_id}`,
      method: "POST",
    }),
    delete: (params: DeleteParams) => ({
      endpoint: `/_synapse/admin/v1/media/unquarantine/${localStorage.getItem("home_server")}/${params.id}`,
      method: "POST",
    }),
  },
  servernotices: {
    map: (n: { event_id: string }) => ({ id: n.event_id }),
    create: (data: RaServerNotice) => ({
      endpoint: "/_synapse/admin/v1/send_server_notice",
      body: {
        user_id: data.id,
        content: {
          msgtype: "m.text",
          body: data.body,
        },
      },
      method: "POST",
    }),
  },
  user_media_statistics: {
    path: "/_synapse/admin/v1/statistics/users/media",
    map: (usms: UserMediaStatistic) => ({
      ...usms,
      id: usms.user_id,
    }),
    data: "users",
    total: json => json.total,
  },
  forward_extremities: {
    map: (fe: ForwardExtremity) => ({
      ...fe,
      id: fe.event_id,
    }),
    reference: (id: Identifier) => ({
      endpoint: `/_synapse/admin/v1/rooms/${id}/forward_extremities`,
    }),
    data: "results",
    total: json => json.count,
    delete: (params: DeleteParams) => ({
      endpoint: `/_synapse/admin/v1/rooms/${params.id}/forward_extremities`,
    }),
  },
  room_directory: {
    path: "/_matrix/client/r0/publicRooms",
    map: (rd: Room) => ({
      ...rd,
      id: rd.room_id,
      public: !!rd.public,
      guest_access: !!rd.guest_access,
      avatar_src: rd.avatar_url ? mxcUrlToHttp(rd.avatar_url) : undefined,
    }),
    data: "chunk",
    total: json => json.total_room_count_estimate,
    create: (params: RaRecord) => ({
      endpoint: `/_matrix/client/r0/directory/list/room/${params.id}`,
      body: { visibility: "public" },
      method: "PUT",
    }),
    delete: (params: DeleteParams) => ({
      endpoint: `/_matrix/client/r0/directory/list/room/${params.id}`,
      body: { visibility: "private" },
      method: "PUT",
    }),
  },
  destinations: {
    path: "/_synapse/admin/v1/federation/destinations",
    map: (dst: Destination) => ({
      ...dst,
      id: dst.destination,
    }),
    data: "destinations",
    total: json => json.total,
    delete: params => ({
      endpoint: `/_synapse/admin/v1/federation/destinations/${params.id}/reset_connection`,
      method: "POST",
    }),
  },
  destination_rooms: {
    map: (dstroom: DestinationRoom) => ({
      ...dstroom,
      id: dstroom.room_id,
    }),
    reference: (id: Identifier) => ({
      endpoint: `/_synapse/admin/v1/federation/destinations/${id}/rooms`,
    }),
    data: "rooms",
    total: json => json.total,
  },
  registration_tokens: {
    path: "/_synapse/admin/v1/registration_tokens",
    map: (rt: RegistrationToken) => ({
      ...rt,
      id: rt.token,
    }),
    data: "registration_tokens",
    total: json => json.registration_tokens.length,
    create: (params: RaRecord) => ({
      endpoint: "/_synapse/admin/v1/registration_tokens/new",
      body: params,
      method: "POST",
    }),
    delete: (params: DeleteParams) => ({
      endpoint: `/_synapse/admin/v1/registration_tokens/${params.id}`,
    }),
  },
};

/* eslint-disable  @typescript-eslint/no-explicit-any */
function filterNullValues(key: string, value: any) {
  // Filtering out null properties
  // to reset user_type from user, it must be null
  if (value === null && key !== "user_type") {
    return undefined;
  }
  return value;
}

function getSearchOrder(order: "ASC" | "DESC") {
  if (order === "DESC") {
    return "b";
  } else {
    return "f";
  }
}

const dataProvider: DataProvider = {
  getList: async (resource, params) => {
    console.log("getList " + resource);
    const { user_id, name, guests, deactivated, search_term, destination, valid } = params.filter;
    const { page, perPage } = params.pagination;
    const { field, order } = params.sort;
    const from = (page - 1) * perPage;
    const query = {
      from: from,
      limit: perPage,
      user_id: user_id,
      search_term: search_term,
      name: name,
      destination: destination,
      guests: guests,
      deactivated: deactivated,
      valid: valid,
      order_by: field,
      dir: getSearchOrder(order),
    };
    const homeserver = localStorage.getItem("base_url");
    if (!homeserver || !(resource in resourceMap)) throw Error("Homeserver not set");

    const res = resourceMap[resource];

    const endpoint_url = homeserver + res.path;
    const url = `${endpoint_url}?${stringify(query)}`;

    const { json } = await jsonClient(url);
    return {
      data: json[res.data].map(res.map),
      total: res.total(json, from, perPage),
    };
  },

  getOne: async (resource, params) => {
    console.log("getOne " + resource);
    const homeserver = localStorage.getItem("base_url");
    if (!homeserver || !(resource in resourceMap)) throw Error("Homeserver not set");

    const res = resourceMap[resource];

    const endpoint_url = homeserver + res.path;
    const { json } = await jsonClient(`${endpoint_url}/${encodeURIComponent(params.id)}`);
    return { data: res.map(json) };
  },

  getMany: async (resource, params) => {
    console.log("getMany " + resource);
    const homeserver = localStorage.getItem("base_url");
    if (!homeserver || !(resource in resourceMap)) throw Error("Homerserver not set");

    const res = resourceMap[resource];

    const endpoint_url = homeserver + res.path;
    const responses = await Promise.all(params.ids.map(id => jsonClient(`${endpoint_url}/${encodeURIComponent(id)}`)));
    return {
      data: responses.map(({ json }) => res.map(json)),
      total: responses.length,
    };
  },

  getManyReference: async (resource, params) => {
    console.log("getManyReference " + resource);
    const { page, perPage } = params.pagination;
    const { field, order } = params.sort;
    const from = (page - 1) * perPage;
    const query = {
      from: from,
      limit: perPage,
      order_by: field,
      dir: getSearchOrder(order),
    };

    const homeserver = localStorage.getItem("base_url");
    if (!homeserver || !(resource in resourceMap)) throw Error("Homeserver not set");

    const res = resourceMap[resource];

    const ref = res.reference(params.id);
    const endpoint_url = `${homeserver}${ref.endpoint}?${stringify(query)}`;

    const { json } = await jsonClient(endpoint_url);
    return {
      data: json[res.data].map(res.map),
      total: res.total(json, from, perPage),
    };
  },

  update: async (resource, params) => {
    console.log("update " + resource);
    const homeserver = localStorage.getItem("base_url");
    if (!homeserver || !(resource in resourceMap)) throw Error("Homeserver not set");

    const res = resourceMap[resource];

    const endpoint_url = homeserver + res.path;
    const { json } = await jsonClient(`${endpoint_url}/${encodeURIComponent(params.id)}`, {
      method: "PUT",
      body: JSON.stringify(params.data, filterNullValues),
    });
    return { data: res.map(json) };
  },

  updateMany: async (resource, params) => {
    console.log("updateMany " + resource);
    const homeserver = localStorage.getItem("base_url");
    if (!homeserver || !(resource in resourceMap)) throw Error("Homeserver not set");

    const res = resourceMap[resource];

    const endpoint_url = homeserver + res.path;
    const responses = await Promise.all(
      params.ids.map(id => jsonClient(`${endpoint_url}/${encodeURIComponent(id)}`), {
        method: "PUT",
        body: JSON.stringify(params.data, filterNullValues),
      })
    );
    return { data: responses.map(({ json }) => json) };
  },

  create: async (resource, params) => {
    console.log("create " + resource);
    const homeserver = localStorage.getItem("base_url");
    if (!homeserver || !(resource in resourceMap)) throw Error("Homeserver not set");

    const res = resourceMap[resource];
    if (!("create" in res)) return Promise.reject();

    const create = res.create(params.data);
    const endpoint_url = homeserver + create.endpoint;
    const { json } = await jsonClient(endpoint_url, {
      method: create.method,
      body: JSON.stringify(create.body, filterNullValues),
    });
    return { data: res.map(json) };
  },

  createMany: async (resource: string, params: { ids: Identifier[]; data: RaRecord }) => {
    console.log("createMany " + resource);
    const homeserver = localStorage.getItem("base_url");
    if (!homeserver || !(resource in resourceMap)) throw Error("Homeserver not set");

    const res = resourceMap[resource];
    if (!("create" in res)) throw Error(`Create ${resource} is not allowed`);

    const responses = await Promise.all(
      params.ids.map(id => {
        params.data.id = id;
        const cre = res.create(params.data);
        const endpoint_url = homeserver + cre.endpoint;
        return jsonClient(endpoint_url, {
          method: cre.method,
          body: JSON.stringify(cre.body, filterNullValues),
        });
      })
    );
    return { data: responses.map(({ json }) => json) };
  },

  delete: async (resource, params) => {
    console.log("delete " + resource);
    const homeserver = localStorage.getItem("base_url");
    if (!homeserver || !(resource in resourceMap)) throw Error("Homeserver not set");

    const res = resourceMap[resource];

    if ("delete" in res) {
      const del = res.delete(params);
      const endpoint_url = homeserver + del.endpoint;
      const { json } = await jsonClient(endpoint_url, {
        method: "method" in del ? del.method : "DELETE",
        body: "body" in del ? JSON.stringify(del.body) : null,
      });
      return { data: json };
    } else {
      const endpoint_url = homeserver + res.path;
      const { json } = await jsonClient(`${endpoint_url}/${params.id}`, {
        method: "DELETE",
        body: JSON.stringify(params.previousData, filterNullValues),
      });
      return { data: json };
    }
  },

  deleteMany: async (resource, params) => {
    console.log("deleteMany " + resource);
    const homeserver = localStorage.getItem("base_url");
    if (!homeserver || !(resource in resourceMap)) throw Error("Homeserver not set");

    const res = resourceMap[resource];

    if ("delete" in res) {
      const responses = await Promise.all(
        params.ids.map(id => {
          const del = res.delete({ ...params, id: id });
          const endpoint_url = homeserver + del.endpoint;
          return jsonClient(endpoint_url, {
            method: "method" in del ? del.method : "DELETE",
            body: "body" in del ? JSON.stringify(del.body) : null,
          });
        })
      );
      return {
        data: responses.map(({ json }) => json),
      };
    } else {
      const endpoint_url = homeserver + res.path;
      const responses = await Promise.all(
        params.ids.map(id =>
          jsonClient(`${endpoint_url}/${id}`, {
            method: "DELETE",
            // body: JSON.stringify(params.data, filterNullValues),  @FIXME
          })
        )
      );
      return { data: responses.map(({ json }) => json) };
    }
  },
};

export default dataProvider;