import type { ExecutionResult, GraphQLSchema } from 'graphql'
import { execute as graphqlExecute, graphql } from 'graphql'
import type { BaseInput } from './types.js'

interface Input extends BaseInput {
  schema: GraphQLSchema
}

export const execute = async (input: Input): Promise<ExecutionResult> => {
  switch (typeof input.document) {
    case `string`: {
      return await graphql({
        schema: input.schema,
        source: input.document,
        // contextValue: createContextValue(), // todo
        variableValues: input.variables,
        operationName: input.operationName,
      })
    }
    case `object`: {
      return await graphqlExecute({
        schema: input.schema,
        document: input.document,
        // contextValue: createContextValue(), // todo
        variableValues: input.variables,
        operationName: input.operationName,
      })
    }
    default:
      throw new Error(`Unsupported GraphQL document type: ${String(document)}`)
  }
}