{-# LANGUAGE QuasiQuotes #-}

-- |
-- Tests for GraphQL query directives.
--
-- https://spec.graphql.org/June2018/#sec-Type-System.Directives
-- https://hasura.io/docs/latest/queries/postgres/variables-aliases-fragments-directives/
-- https://hasura.io/docs/latest/queries/ms-sql-server/variables-aliases-fragments-directives/
-- https://hasura.io/docs/latest/queries/bigquery/variables-aliases-fragments-directives/
module Test.Queries.DirectivesSpec (spec) where

import Data.Aeson (Value)
import Harness.Backend.BigQuery qualified as BigQuery
import Harness.Backend.Citus qualified as Citus
import Harness.Backend.Mysql qualified as Mysql
import Harness.Backend.Postgres qualified as Postgres
import Harness.Backend.Sqlserver qualified as Sqlserver
import Harness.GraphqlEngine (postGraphql)
import Harness.Quoter.Graphql (graphql)
import Harness.Quoter.Yaml (yaml)
import Harness.Test.Context (Options (..))
import Harness.Test.Fixture qualified as Fixture
import Harness.Test.Schema (Table (..), table)
import Harness.Test.Schema qualified as Schema
import Harness.TestEnvironment (TestEnvironment)
import Harness.Yaml (shouldReturnYaml)
import Hasura.Prelude
import Test.Hspec (SpecWith, describe, it)

spec :: SpecWith TestEnvironment
spec = do
  Fixture.run
    [ (Fixture.fixture $ Fixture.Backend Fixture.MySQL)
        { Fixture.setupTeardown = \(testEnv, _) ->
            [ Mysql.setupTablesAction schema testEnv
            ]
        },
      (Fixture.fixture $ Fixture.Backend Fixture.Postgres)
        { Fixture.setupTeardown = \(testEnv, _) ->
            [ Postgres.setupTablesAction schema testEnv
            ]
        },
      (Fixture.fixture $ Fixture.Backend Fixture.Citus)
        { Fixture.setupTeardown = \(testEnv, _) ->
            [ Citus.setupTablesAction schema testEnv
            ]
        },
      (Fixture.fixture $ Fixture.Backend Fixture.SQLServer)
        { Fixture.setupTeardown = \(testEnv, _) ->
            [ Sqlserver.setupTablesAction schema testEnv
            ]
        },
      (Fixture.fixture $ Fixture.Backend Fixture.BigQuery)
        { Fixture.setupTeardown = \(testEnv, _) ->
            [ BigQuery.setupTablesAction schema testEnv
            ],
          Fixture.customOptions =
            Just $
              Fixture.Options
                { stringifyNumbers = True
                }
        }
    ]
    tests

--------------------------------------------------------------------------------
-- Schema

schema :: [Schema.Table]
schema =
  [ (table "author")
      { tableColumns =
          [ Schema.column "id" Schema.TInt,
            Schema.column "name" Schema.TStr
          ],
        tablePrimaryKey = ["id"],
        tableData =
          [ [Schema.VInt 1, Schema.VStr "Author 1"],
            [Schema.VInt 2, Schema.VStr "Author 2"]
          ]
      }
  ]

--------------------------------------------------------------------------------
-- Tests

tests :: Fixture.Options -> SpecWith TestEnvironment
tests opts = do
  let shouldBe :: IO Value -> Value -> IO ()
      shouldBe = shouldReturnYaml opts

  describe "Directives" do
    it "Rejects unknown directives" \testEnvironment -> do
      let expected :: Value
          expected =
            [yaml|
              errors:
              - extensions:
                  path: $.selectionSet.hasura_author.selectionSet
                  code: validation-failed
                message: |-
                  directive 'exclude' is not defined in the schema
            |]

          actual :: IO Value
          actual =
            postGraphql
              testEnvironment
              [graphql|
                query {
                  hasura_author {
                    id @exclude(if: true)
                    name
                  }
                }
              |]

      actual `shouldBe` expected

    it "Rejects duplicate directives" \testEnvironment -> do
      let expected :: Value
          expected =
            [yaml|
              errors:
              - extensions:
                  path: $.selectionSet.hasura_author.selectionSet
                  code: validation-failed
                message: |-
                  the following directives are used more than once: ['include']
            |]

          actual :: IO Value
          actual =
            postGraphql
              testEnvironment
              [graphql|
                query {
                  hasura_author {
                    id @include(if: true) @include(if: true)
                    name
                  }
                }
              |]

      actual `shouldBe` expected

    it "Rejects directives on wrong element" \testEnvironment -> do
      let expected :: Value
          expected =
            [yaml|
              errors:
              - extensions:
                  path: $
                  code: validation-failed
                message: |-
                  directive 'include' is not allowed on a query
            |]

          actual :: IO Value
          actual =
            postGraphql
              testEnvironment
              [graphql|
                query @include(if: true) {
                  hasura_author {
                    id
                    name
                  }
                }
              |]

      actual `shouldBe` expected