import { ApolloClient } from "apollo-client";
import {
  InMemoryCache,
  IntrospectionFragmentMatcher,
} from "apollo-cache-inmemory";
import { HttpLink } from "apollo-link-http";
import { onError } from "apollo-link-error";
import { ApolloLink, split } from "apollo-link";
import { WebSocketLink } from "apollo-link-ws";
import { getMainDefinition } from "apollo-utilities";
import gql from "graphql-tag";

import introspectionQueryResultData from "./fragmentTypes.json";

import {
  propertyVectorFragment,
  vectorFragment,
  deviceInfoFragment,
} from "./graphql/fragment";
import { isConnectedQuery } from "./graphql/query";

// Create an http link:
const httpLink = new HttpLink({
  uri: "/graphql",
});

// Create a WebSocket link:
const wsLink = new WebSocketLink({
  uri: `ws://${window.location.host}/graphql`,
  options: {
    reconnect: true,
  },
});

const link = split(
  // split based on operation type
  ({ query }) => {
    const definition = getMainDefinition(query);
    return (
      definition.kind === "OperationDefinition" &&
      definition.operation === "subscription"
    );
  },
  wsLink,
  httpLink
);

const client = new ApolloClient({
  link: ApolloLink.from([
    onError(({ graphQLErrors, networkError }) => {
      if (graphQLErrors)
        graphQLErrors.forEach(({ message, locations, path }) =>
          console.log(
            `[GraphQL error]: Message: ${message}, Location: ${locations}, Path: ${path}`
          )
        );
      if (networkError) console.log(`[Network error]: ${networkError}`);
    }),
    link,
  ]),
  cache: new InMemoryCache({
    fragmentMatcher: new IntrospectionFragmentMatcher({
      introspectionQueryResultData,
    }),
    cacheRedirects: {
      Query: {
        device: (_, args, { getCacheKey }) =>
          getCacheKey({ __typename: "Device", id: args.id }),
      },
    },
  }),
});

const CONNECTED = gql`
  subscription connected {
    connected
  }
`;

client
  .subscribe({
    query: CONNECTED,
  })
  .subscribe(({ data }) => {
    client.writeQuery({
      query: isConnectedQuery,
      data: { connected: data.connected },
    });
    console.log(data);
  });

const DISCONNECTED = gql`
  subscription disconnected {
    disconnected
  }
`;

client
  .subscribe({
    query: DISCONNECTED,
  })
  .subscribe(({ data }) => {
    console.log(data);
  });

const NEW_DEVICE = gql`
  subscription newDevice {
    newDevice {
      id
      ...DeviceInfo
    }
  }

  ${deviceInfoFragment}
`;

const GETDEVICES = gql`
  query devices {
    devices {
      id
      ...DeviceInfo
      properties {
        id
        name
        ...PropertyVector
      }
    }
  }

  ${deviceInfoFragment}
  ${propertyVectorFragment}
`;

const GETDEVICE = gql`
  query device($id: String!) {
    device(id: $id) {
      id
      ...DeviceInfo
      properties {
        id
        name
        ...PropertyVector
      }
    }
  }

  ${deviceInfoFragment}
  ${propertyVectorFragment}
`;

client
  .subscribe({
    query: NEW_DEVICE,
  })
  .subscribe(({ data }) => {
    const res = client.readQuery({ query: GETDEVICES });
    data.newDevice.properties = [];
    client.writeQuery({
      query: GETDEVICES,
      data: { devices: [...res.devices, data.newDevice] },
    });
  });

const NEW_PROPERTY = gql`
  subscription newProperty {
    newProperty {
      id
      name
      device
      ...PropertyVector
    }
  }

  ${propertyVectorFragment}
`;

client
  .subscribe({
    query: NEW_PROPERTY,
  })
  .subscribe(({ data }) => {
    const res = client.readQuery({
      query: GETDEVICE,
      variables: { id: data.newProperty.device },
    });
    client.writeQuery({
      query: GETDEVICE,
      variables: { id: res.device.id },
      data: {
        device: {
          ...res.device,
          drivers:
            data.newProperty.name === "DRIVER_INFO"
              ? data.newProperty.vector.values[3].text
              : res.device.drivers,
          connected:
            data.newProperty.name === "CONNECTION"
              ? data.newProperty.vector.values[0].switch
              : res.device.connected,
          properties: [...res.device.properties, data.newProperty],
        },
      },
    });
  });

const NEW_VALUE = gql`
  subscription newValue {
    newValue {
      id
      device
      ...VectorData
    }
  }

  ${vectorFragment}
`;

client
  .subscribe({
    query: NEW_VALUE,
  })
  .subscribe(({ data }) => {
    if (data.newValue.name === "CONNECTION") {
      const res = client.readQuery({
        query: GETDEVICE,
        variables: { id: data.newValue.device },
      });
      client.writeQuery({
        query: GETDEVICE,
        variables: { id: res.device.id },
        data: {
          device: {
            ...res.device,
            connected: data.newValue.values[0].switch,
          },
        },
      });
      console.log(res);
    }
  });

export default client;