{-# LANGUAGE QuasiQuotes #-}

-- |
-- Tests for the interactions between @skip and @include 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.Directives.IncludeAndSkipSpec (spec) where

import Data.Aeson (Value, object, (.=))
import Data.List.NonEmpty qualified as NE
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, postGraphqlWithPair)
import Harness.Quoter.Graphql (graphql)
import Harness.Quoter.Yaml (interpolateYaml)
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
    ( NE.fromList
        [ (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 "Mixes @include and @skip directives" do
    it "Returns the field when @include(if: true) and @skip(if: false)" \testEnvironment -> do
      let schemaName = Schema.getSchemaName testEnvironment

      let expected :: Value
          expected =
            [interpolateYaml|
              data:
                #{schemaName}_author:
                - id: 1
                  name: Author 1
                - id: 2
                  name: Author 2
            |]

          actual :: IO Value
          actual =
            postGraphql
              testEnvironment
              [graphql|
                query {
                  #{schemaName}_author(order_by: [{ id: asc }]) {
                    id @include(if: true) @skip(if: false)
                    name
                  }
                }
              |]

      actual `shouldBe` expected

    it "Doesn't return the field when @include(if: false) and @skip(if: false)" \testEnvironment -> do
      let schemaName = Schema.getSchemaName testEnvironment

      let expected :: Value
          expected =
            [interpolateYaml|
              data:
                #{schemaName}_author:
                - name: Author 1
                - name: Author 2
            |]

          actual :: IO Value
          actual =
            postGraphql
              testEnvironment
              [graphql|
                query {
                  #{schemaName}_author(order_by: [{ id: asc }]) {
                    id @include(if: false) @skip(if: false)
                    name
                  }
                }
              |]

      actual `shouldBe` expected

    it "Doesn't return the field when @include(if: false) and @skip(if: true)" \testEnvironment -> do
      let schemaName = Schema.getSchemaName testEnvironment

      let expected :: Value
          expected =
            [interpolateYaml|
              data:
                #{schemaName}_author:
                - name: Author 1
                - name: Author 2
            |]

          actual :: IO Value
          actual =
            postGraphql
              testEnvironment
              [graphql|
                query {
                  #{schemaName}_author(order_by: [{ id: asc }]) {
                    id @include(if: false) @skip(if: true)
                    name
                  }
                }
              |]

      actual `shouldBe` expected

    it "Doesn't return the field when @include(if: true) and @skip(if: true)" \testEnvironment -> do
      let schemaName = Schema.getSchemaName testEnvironment

      let expected :: Value
          expected =
            [interpolateYaml|
              data:
                #{schemaName}_author:
                - name: Author 1
                - name: Author 2
            |]

          actual :: IO Value
          actual =
            postGraphqlWithPair
              testEnvironment
              [graphql|
                query test($skip: Boolean!, $include: Boolean!) {
                  #{schemaName}_author(order_by: [{ id: asc }]) {
                    id @include(if: $include) @skip(if: $skip)
                    name
                  }
                }
              |]
              ["variables" .= object ["skip" .= True, "include" .= True]]

      actual `shouldBe` expected