package queryupdate

import (
	"context"
	"errors"
	"fmt"
	"testing"

	"queryorchestration/internal/database/repository"
	"queryorchestration/internal/query"
	resultprocessor "queryorchestration/internal/query/result/processor"
	"queryorchestration/internal/serviceconfig"
	"queryorchestration/internal/serviceconfig/queue/queryversionsync"
	queuemock "queryorchestration/mocks/queue"

	"github.com/stretchr/testify/require"

	"github.com/aws/aws-sdk-go-v2/service/sqs"
	"github.com/google/uuid"
	"github.com/jackc/pgx/v5"
	"github.com/pashagolub/pgxmock/v3"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/mock"
)

type QueryUpdateConfig struct {
	serviceconfig.BaseConfig
	queryversionsync.QueryVersionSyncConfig
}

func TestGetUpdator(t *testing.T) {
	pool, err := pgxmock.NewPool()
	require.NoError(t, err)
	cfg := &QueryUpdateConfig{}
	cfg.DBPool = pool
	cfg.DBQueries = repository.New(pool)
	svc := New(cfg, &Services{
		Query: query.New(cfg),
	})

	queryType := resultprocessor.Type(resultprocessor.TypeContextFull)
	updator, err := svc.getUpdator(queryType)
	require.NoError(t, err)
	assert.NotNil(t, updator)

	queryType = resultprocessor.Type(resultprocessor.TypeJsonExtractor)
	updator, err = svc.getUpdator(queryType)
	require.NoError(t, err)
	assert.NotNil(t, updator)

	queryType = resultprocessor.Type(-1)
	_, err = svc.getUpdator(queryType)
	assert.Error(t, err)
}

func TestSubmitUpdate(t *testing.T) {
	ctx := context.Background()

	pool, err := pgxmock.NewPool()
	require.NoError(t, err)
	cfg := &QueryUpdateConfig{}
	cfg.DBPool = pool
	cfg.DBQueries = repository.New(pool)
	svc := New(cfg, &Services{
		Query: query.New(cfg),
	})

	config := "{\"path\":\"example_path\"}"
	q := query.Query{
		ID: uuid.New(),
		RequiredQueryIDs: &[]uuid.UUID{
			uuid.New(),
		},
		Config:        &config,
		ActiveVersion: int32(1),
		LatestVersion: int32(2),
	}
	aV := int32(10)
	update := &resultprocessor.Update{
		ID: q.ID,
		RequiredQueryIDs: &[]uuid.UUID{
			uuid.New(),
		},
		Config:        q.Config,
		ActiveVersion: &aV,
	}

	pool.ExpectBeginTx(pgx.TxOptions{})
	pool.ExpectQuery("name: AddLatestQueryVersion :one").WithArgs(q.ID).WillReturnRows(
		pgxmock.NewRows([]string{"version"}).
			AddRow(int32(3)),
	)
	pool.ExpectExec("name: AddActiveQueryVersion :exec").WithArgs(q.ID, aV).
		WillReturnResult(pgxmock.NewResult("", 1))
	pool.ExpectExec("name: AddRequiredQuery :exec").WithArgs(update.ID, (*update.RequiredQueryIDs)[0], pgxmock.AnyArg()).
		WillReturnResult(pgxmock.NewResult("", 1))
	pool.ExpectExec("name: RemoveRequiredQuery :exec").WithArgs(pgxmock.AnyArg(), (*q.RequiredQueryIDs)[0], update.ID).
		WillReturnResult(pgxmock.NewResult("", 1))
	pool.ExpectExec("name: SetQueryConfig :exec").WithArgs(update.ID, []byte(*update.Config), int32(3)).
		WillReturnResult(pgxmock.NewResult("", 1))
	pool.ExpectCommit()

	err = svc.submitUpdate(ctx, &q, update)
	require.NoError(t, err)
}

func TestSubmitUpdateRollback(t *testing.T) {
	ctx := context.Background()

	pool, err := pgxmock.NewPool()
	require.NoError(t, err)
	cfg := &QueryUpdateConfig{}
	cfg.DBPool = pool
	cfg.DBQueries = repository.New(pool)
	svc := New(cfg, &Services{
		Query: query.New(cfg),
	})

	q := query.Query{
		ID:            uuid.New(),
		ActiveVersion: int32(1),
		LatestVersion: int32(2),
	}
	aV := int32(10)
	update := &resultprocessor.Update{
		ID:            q.ID,
		ActiveVersion: &aV,
	}

	pool.ExpectBeginTx(pgx.TxOptions{})
	msg := "database failure"
	pool.ExpectExec("name: AddActiveQueryVersion :exec").WithArgs(q.ID, aV).
		WillReturnError(errors.New(msg))
	pool.ExpectCommit()

	err = svc.submitUpdate(ctx, &q, update)
	assert.EqualError(t, err, msg)
}

func TestSubmitUpdateRequiredQueries(t *testing.T) {
	t.Run("all fields", func(t *testing.T) {

		ctx := context.Background()

		pool, err := pgxmock.NewPool()
		require.NoError(t, err)
		cfg := &QueryUpdateConfig{}
		cfg.DBPool = pool
		cfg.DBQueries = repository.New(pool)
		svc := New(cfg, &Services{
			Query: query.New(cfg),
		})

		config := "{\"path\":\"example_path\"}"
		q := query.Query{
			ID: uuid.New(),
			RequiredQueryIDs: &[]uuid.UUID{
				uuid.New(),
				uuid.New(),
				uuid.New(),
			},
			Config:        &config,
			ActiveVersion: int32(1),
			LatestVersion: int32(2),
		}
		update := &resultprocessor.Update{
			ID: q.ID,
			RequiredQueryIDs: &[]uuid.UUID{
				uuid.New(),
				uuid.New(),
				(*q.RequiredQueryIDs)[0],
			},
		}

		pool.ExpectBeginTx(pgx.TxOptions{})
		pool.ExpectQuery("name: AddLatestQueryVersion :one").WithArgs(update.ID).WillReturnRows(
			pgxmock.NewRows([]string{"version"}).
				AddRow(int32(1)),
		)
		pool.ExpectExec("name: AddRequiredQuery :exec").WithArgs(update.ID, (*update.RequiredQueryIDs)[0], pgxmock.AnyArg()).
			WillReturnResult(pgxmock.NewResult("", 1))
		pool.ExpectExec("name: AddRequiredQuery :exec").WithArgs(update.ID, (*update.RequiredQueryIDs)[1], pgxmock.AnyArg()).
			WillReturnResult(pgxmock.NewResult("", 1))
		pool.ExpectExec("name: RemoveRequiredQuery :exec").WithArgs(pgxmock.AnyArg(), (*q.RequiredQueryIDs)[1], update.ID).
			WillReturnResult(pgxmock.NewResult("", 1))
		pool.ExpectExec("name: RemoveRequiredQuery :exec").WithArgs(pgxmock.AnyArg(), (*q.RequiredQueryIDs)[2], update.ID).
			WillReturnResult(pgxmock.NewResult("", 1))
		pool.ExpectCommit()

		err = svc.submitUpdate(ctx, &q, update)
		require.NoError(t, err)
	})
	t.Run("all nil", func(t *testing.T) {

		ctx := context.Background()

		pool, err := pgxmock.NewPool()
		require.NoError(t, err)
		cfg := &QueryUpdateConfig{}
		cfg.DBPool = pool
		cfg.DBQueries = repository.New(pool)
		svc := New(cfg, &Services{
			Query: query.New(cfg),
		})

		config := "{\"path\":\"example_path\"}"
		q := query.Query{
			ID: uuid.New(),
			RequiredQueryIDs: &[]uuid.UUID{
				uuid.New(),
				uuid.New(),
				uuid.New(),
			},
			Config:        &config,
			ActiveVersion: 1,
			LatestVersion: 2,
		}
		av := int32(2)
		update := &resultprocessor.Update{
			ID:            q.ID,
			ActiveVersion: &av,
		}

		pool.ExpectBeginTx(pgx.TxOptions{})
		pool.ExpectExec("name: AddActiveQueryVersion :exec").WithArgs(q.ID, av).
			WillReturnResult(pgxmock.NewResult("", 1))
		pool.ExpectCommit()

		err = svc.submitUpdate(ctx, &q, update)
		require.NoError(t, err)
	})
}

func TestSubmitUpdateActiveVersion(t *testing.T) {
	ctx := context.Background()

	pool, err := pgxmock.NewPool()
	require.NoError(t, err)
	cfg := &QueryUpdateConfig{}
	cfg.DBPool = pool
	cfg.DBQueries = repository.New(pool)
	svc := New(cfg, &Services{
		Query: query.New(cfg),
	})

	q := query.Query{
		ID:            uuid.New(),
		ActiveVersion: int32(1),
		LatestVersion: int32(2),
	}
	aV := int32(10)
	update := &resultprocessor.Update{
		ID:            q.ID,
		ActiveVersion: &aV,
	}

	pool.ExpectBeginTx(pgx.TxOptions{})
	pool.ExpectExec("name: AddActiveQueryVersion :exec").WithArgs(q.ID, aV).
		WillReturnResult(pgxmock.NewResult("", 1))
	pool.ExpectCommit()

	err = svc.submitUpdate(ctx, &q, update)
	require.NoError(t, err)
}

func TestGetSetDifference(t *testing.T) {
	commonUUID := uuid.New()
	listA := []uuid.UUID{uuid.New(), commonUUID}
	listB := []uuid.UUID{uuid.New(), commonUUID}

	assert.ElementsMatch(t, []uuid.UUID{}, getSetDifference(nil, nil))
	assert.ElementsMatch(t, listA, getSetDifference(&listA, nil))
	assert.ElementsMatch(t, []uuid.UUID{}, getSetDifference(nil, &listB))
	assert.ElementsMatch(t, []uuid.UUID{listA[0]}, getSetDifference(&listA, &listB))
	assert.ElementsMatch(t, []uuid.UUID{listB[0]}, getSetDifference(&listB, &listA))
	assert.ElementsMatch(t, []uuid.UUID{}, getSetDifference(&listA, &listA))
}

func TestNormalizeUpdate(t *testing.T) {
	t.Run("all fields to change", func(t *testing.T) {
		ctx := context.Background()

		pool, err := pgxmock.NewPool()
		require.NoError(t, err)
		cfg := &QueryUpdateConfig{}
		cfg.DBPool = pool
		cfg.DBQueries = repository.New(pool)
		svc := New(cfg, &Services{
			Query: query.New(cfg),
		})

		current := &query.Query{
			ID:            uuid.New(),
			ActiveVersion: int32(1),
			LatestVersion: int32(2),
			Type:          resultprocessor.TypeJsonExtractor,
		}
		qcfg := "{}"
		aV := int32(2)
		update := &resultprocessor.Update{
			ID:               current.ID,
			Config:           &qcfg,
			ActiveVersion:    &aV,
			RequiredQueryIDs: &[]uuid.UUID{},
		}

		err = svc.normalizeUpdate(ctx, current, update)
		require.NoError(t, err)
		assert.EqualExportedValues(t, resultprocessor.Update{
			ID:               current.ID,
			ActiveVersion:    &aV,
			Config:           &qcfg,
			RequiredQueryIDs: nil,
		}, *update)
	})

	t.Run("no changes", func(t *testing.T) {
		ctx := context.Background()

		pool, err := pgxmock.NewPool()
		require.NoError(t, err)
		cfg := &QueryUpdateConfig{}
		cfg.DBPool = pool
		cfg.DBQueries = repository.New(pool)
		svc := New(cfg, &Services{
			Query: query.New(cfg),
		})

		current := &query.Query{
			ID:            uuid.New(),
			ActiveVersion: int32(1),
			LatestVersion: int32(2),
			Type:          resultprocessor.TypeJsonExtractor,
		}
		update := &resultprocessor.Update{
			ID: current.ID,
		}
		err = svc.normalizeUpdate(ctx, current, update)
		assert.EqualError(t, err, "no changes")
	})

	t.Run("same active version", func(t *testing.T) {
		ctx := context.Background()

		pool, err := pgxmock.NewPool()
		require.NoError(t, err)
		cfg := &QueryUpdateConfig{}
		cfg.DBPool = pool
		cfg.DBQueries = repository.New(pool)
		svc := New(cfg, &Services{
			Query: query.New(cfg),
		})

		version := int32(1)
		current := &query.Query{
			ID:            uuid.New(),
			ActiveVersion: version,
			LatestVersion: int32(2),
			Type:          resultprocessor.TypeJsonExtractor,
		}
		update := &resultprocessor.Update{
			ID:            current.ID,
			ActiveVersion: &version,
		}
		err = svc.normalizeUpdate(ctx, current, update)
		assert.EqualError(t, err, "no changes")
	})

	t.Run("ONLY active version to next latest", func(t *testing.T) {
		ctx := context.Background()

		pool, err := pgxmock.NewPool()
		require.NoError(t, err)
		cfg := &QueryUpdateConfig{}
		cfg.DBPool = pool
		cfg.DBQueries = repository.New(pool)
		svc := New(cfg, &Services{
			Query: query.New(cfg),
		})

		current := &query.Query{
			ID:            uuid.New(),
			ActiveVersion: 1,
			LatestVersion: 2,
			Type:          resultprocessor.TypeJsonExtractor,
		}
		version := int32(3)
		update := &resultprocessor.Update{
			ID:            current.ID,
			ActiveVersion: &version,
		}
		err = svc.normalizeUpdate(ctx, current, update)
		assert.EqualError(t, err, "no changes")
	})
}

func TestNormalizeUpdateRequiredQueryIDs(t *testing.T) {
	t.Run("Empty Array", func(t *testing.T) {
		ctx := context.Background()

		pool, err := pgxmock.NewPool()
		require.NoError(t, err)
		cfg := &QueryUpdateConfig{}
		cfg.DBPool = pool
		cfg.DBQueries = repository.New(pool)
		svc := New(cfg, &Services{
			Query: query.New(cfg),
		})

		current := &query.Query{
			ID:   uuid.New(),
			Type: resultprocessor.TypeJsonExtractor,
		}
		update := &resultprocessor.Update{
			ID:               current.ID,
			RequiredQueryIDs: &[]uuid.UUID{},
		}

		err = svc.normalizeUpdateRequiredQueryIDs(ctx, current, update)
		require.NoError(t, err)
		assert.EqualExportedValues(t, resultprocessor.Update{
			ID: current.ID,
		}, *update)
	})

	t.Run("entry doesn't exist", func(t *testing.T) {
		ctx := context.Background()

		pool, err := pgxmock.NewPool()
		require.NoError(t, err)
		cfg := &QueryUpdateConfig{}
		cfg.DBPool = pool
		cfg.DBQueries = repository.New(pool)
		svc := New(cfg, &Services{
			Query: query.New(cfg),
		})

		current := &query.Query{
			ID:   uuid.New(),
			Type: resultprocessor.TypeJsonExtractor,
		}
		update := &resultprocessor.Update{
			ID:               current.ID,
			RequiredQueryIDs: &[]uuid.UUID{uuid.New()},
		}
		dbids := *update.RequiredQueryIDs

		pool.ExpectQuery("name: AllQueriesExist :one").WithArgs(dbids).WillReturnRows(
			pgxmock.NewRows([]string{"all_exist"}).
				AddRow(false),
		)

		err = svc.normalizeUpdateRequiredQueryIDs(ctx, current, update)
		assert.Error(t, err)
	})
	t.Run("in dependency tree", func(t *testing.T) {
		ctx := context.Background()

		pool, err := pgxmock.NewPool()
		require.NoError(t, err)
		cfg := &QueryUpdateConfig{}
		cfg.DBPool = pool
		cfg.DBQueries = repository.New(pool)
		svc := New(cfg, &Services{
			Query: query.New(cfg),
		})

		current := &query.Query{
			ID:   uuid.New(),
			Type: resultprocessor.TypeJsonExtractor,
		}
		update := &resultprocessor.Update{
			ID:               current.ID,
			RequiredQueryIDs: &[]uuid.UUID{uuid.New()},
		}

		dbids := *update.RequiredQueryIDs
		pool.ExpectQuery("name: AllQueriesExist :one").WithArgs(dbids).WillReturnRows(
			pgxmock.NewRows([]string{"all_exist"}).
				AddRow(true),
		)
		pool.ExpectQuery("name: IsQueryInDependencyTree :one").WithArgs(dbids, current.ID).WillReturnRows(
			pgxmock.NewRows([]string{"all_exist"}).
				AddRow(true),
		)

		err = svc.normalizeUpdateRequiredQueryIDs(ctx, current, update)
		assert.Error(t, err)
	})
	t.Run("same update and current", func(t *testing.T) {
		ctx := context.Background()
		pool, err := pgxmock.NewPool()
		require.NoError(t, err)
		cfg := &QueryUpdateConfig{}
		cfg.DBPool = pool
		cfg.DBQueries = repository.New(pool)
		svc := New(cfg, &Services{
			Query: query.New(cfg),
		})

		current := &query.Query{
			ID:   uuid.New(),
			Type: resultprocessor.TypeJsonExtractor,
		}
		update := &resultprocessor.Update{
			ID: current.ID,
		}
		ids := []uuid.UUID{uuid.New()}
		update.RequiredQueryIDs = &ids
		current.RequiredQueryIDs = &ids

		dbids := *update.RequiredQueryIDs
		pool.ExpectQuery("name: AllQueriesExist :one").WithArgs(dbids).WillReturnRows(
			pgxmock.NewRows([]string{"all_exist"}).
				AddRow(true),
		)
		pool.ExpectQuery("name: IsQueryInDependencyTree :one").WithArgs(dbids, &current.ID).WillReturnRows(
			pgxmock.NewRows([]string{"all_exist"}).
				AddRow(false),
		)

		err = svc.normalizeUpdateRequiredQueryIDs(ctx, current, update)
		require.NoError(t, err)
		assert.EqualExportedValues(t, resultprocessor.Update{
			ID: current.ID,
		}, *update)
	})
}

func TestInformUpdate(t *testing.T) {
	t.Run("nil active version", func(t *testing.T) {
		ctx := context.Background()

		cfg := &QueryUpdateConfig{}
		mockSQS := queuemock.NewMockSQSClient(t)
		cfg.QueueClient = mockSQS
		cfg.QueryVersionSyncURL = "/here"
		svc := Service{
			cfg: cfg,
		}

		entity := &resultprocessor.Update{
			ID:            uuid.New(),
			ActiveVersion: nil,
		}

		err := svc.informUpdate(ctx, entity)
		require.NoError(t, err)
	})
	t.Run("update active version", func(t *testing.T) {
		ctx := context.Background()

		cfg := &QueryUpdateConfig{}
		mockSQS := queuemock.NewMockSQSClient(t)
		cfg.QueueClient = mockSQS
		cfg.QueryVersionSyncURL = "/here"
		svc := Service{
			cfg: cfg,
		}

		av := int32(2)
		entity := &resultprocessor.Update{
			ID:            uuid.New(),
			ActiveVersion: &av,
		}

		mockSQS.EXPECT().
			SendMessage(
				mock.Anything,
				mock.MatchedBy(func(in *sqs.SendMessageInput) bool {
					return *in.QueueUrl == cfg.QueryVersionSyncURL && *in.MessageBody == fmt.Sprintf("{\"id\":\"%s\"}", entity.ID.String())
				}),
				mock.Anything,
			).
			Return(&sqs.SendMessageOutput{}, nil)

		err := svc.informUpdate(ctx, entity)
		require.NoError(t, err)
	})
}