import {
  GraphQLNonNull,
  GraphQLObjectType,
  GraphQLSchema,
  GraphQLString,
  printSchema,
} from 'graphql'
import { RootQueryTypeResolvers } from '~/__generated__/graphql'
import { errorRoot, errorsRoot } from './error/errorResolver'
import { searchRoot } from './globalSearch/globalSearchResolver'
import { GraphQLObjectTypeGuide } from './guide/guideSchema'
import { GraphQLObjectTypeReferenceCLICommand } from './reference/referenceCLISchema'
import { GraphQLObjectTypeReferenceManagementApi } from './reference/referenceManagementApiSchema'
import { GraphQLObjectTypeReferenceSDKFunction } from './reference/referenceSDKSchema'
import { GraphQLObjectTypeTroubleshooting } from './troubleshooting/troubleshootingSchema'

const GRAPHQL_FIELD_INTROSPECT = 'schema' as const

type IntrospectResolver = RootQueryTypeResolvers[typeof GRAPHQL_FIELD_INTROSPECT]

const resolveIntrospect: IntrospectResolver = async () => {
  const schema = printSchema(rootGraphQLSchema)
  return schema
}

const introspectRoot = {
  [GRAPHQL_FIELD_INTROSPECT]: {
    description: 'Get the GraphQL schema for this endpoint',
    type: new GraphQLNonNull(GraphQLString),
    resolve: resolveIntrospect,
  },
}

export const rootGraphQLSchema = new GraphQLSchema({
  query: new GraphQLObjectType({
    name: 'RootQueryType',
    fields: {
      ...introspectRoot,
      ...searchRoot,
      ...errorRoot,
      ...errorsRoot,
    },
  }),
  types: [
    GraphQLObjectTypeGuide,
    GraphQLObjectTypeReferenceCLICommand,
    GraphQLObjectTypeReferenceManagementApi,
    GraphQLObjectTypeReferenceSDKFunction,
    GraphQLObjectTypeTroubleshooting,
  ],
})