package query

import (
	"context"
	"queryorchestration/internal/database"
	"queryorchestration/internal/database/repository"
	queryprocessor "queryorchestration/internal/query/processor"
	"testing"

	"github.com/google/uuid"
	"github.com/jackc/pgx/v5"
	"github.com/pashagolub/pgxmock/v3"
	"github.com/stretchr/testify/assert"
)

func TestGetCreator(t *testing.T) {
	pool, err := pgxmock.NewPool()
	if err != nil {
		t.Fatalf("failed to open pgxmock database: %v", err)
	}
	queries := repository.New(pool)
	db := &database.Connection{
		Queries: queries,
		Pool:    pool,
	}
	svc := New(db)

	queryType := queryprocessor.Type(queryprocessor.TypeContextFull)
	creator, err := svc.getCreator(queryType)
	assert.Nil(t, err)
	assert.NotNil(t, creator)

	queryType = queryprocessor.Type(queryprocessor.TypeJsonExtractor)
	creator, err = svc.getCreator(queryType)
	assert.Nil(t, err)
	assert.NotNil(t, creator)

	queryType = queryprocessor.Type(-1)
	_, err = svc.getCreator(queryType)
	assert.NotNil(t, err)
}

func TestParseCreateQuery(t *testing.T) {
	cfg := "{\"key\":\"value\"}"
	cQuery := &queryprocessor.Create{
		Type: queryprocessor.TypeContextFull,
		RequiredQueryIDs: &[]uuid.UUID{
			uuid.New(),
		},
		Config: &cfg,
	}

	resultQuery, err := parseCreateQuery(cQuery)
	assert.Nil(t, err)
	rQIDs := database.MustToDBUUIDArray(*cQuery.RequiredQueryIDs)
	qcfg := []byte(*cQuery.Config)
	assert.EqualExportedValues(t, createQuery{
		Type:             repository.QuerytypeContextFull,
		RequiredQueryIDs: &rQIDs,
		Config:           &qcfg,
	}, *resultQuery)
}

func TestParseCreateQueryInvalidType(t *testing.T) {
	cfg := "{\"key\":\"value\"}"
	cQuery := &queryprocessor.Create{
		Type: queryprocessor.Type(-1),
		RequiredQueryIDs: &[]uuid.UUID{
			uuid.New(),
		},
		Config: &cfg,
	}

	_, err := parseCreateQuery(cQuery)
	assert.EqualError(t, err, "invalid database query type")
}

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

	pool, err := pgxmock.NewPool()
	if err != nil {
		t.Fatalf("failed to open pgxmock database: %v", err)
	}
	queries := repository.New(pool)
	db := &database.Connection{
		Queries: queries,
		Pool:    pool,
	}
	svc := New(db)

	config := "{\"path\":\"example_path\"}"
	q := Query{
		ID:   uuid.New(),
		Type: queryprocessor.TypeJsonExtractor,
		RequiredQueryIDs: &[]uuid.UUID{
			uuid.New(),
		},
		Config: &config,
	}
	create := &queryprocessor.Create{
		Type:             q.Type,
		RequiredQueryIDs: q.RequiredQueryIDs,
		Config:           q.Config,
	}

	dbType, err := queryprocessor.ToDBQueryType(create.Type)
	assert.Nil(t, err)

	pool.ExpectBeginTx(pgx.TxOptions{})
	pool.ExpectQuery("name: CreateQuery :one").WithArgs(dbType).WillReturnRows(
		pgxmock.NewRows([]string{"id"}).
			AddRow(database.MustToDBUUID(q.ID)),
	)
	for _, req := range *create.RequiredQueryIDs {
		pool.ExpectExec("name: AddRequiredQuery :exec").WithArgs(database.MustToDBUUID(q.ID), database.MustToDBUUID(req), int32(1)).
			WillReturnResult(pgxmock.NewResult("", 1))
	}
	pool.ExpectExec("name: AddQueryConfig :exec").WithArgs(database.MustToDBUUID(q.ID), []byte(*create.Config), int32(1)).
		WillReturnResult(pgxmock.NewResult("", 1))
	pool.ExpectCommit()

	id, err := svc.submitCreate(ctx, create)
	assert.Nil(t, err)
	assert.Equal(t, q.ID, id)
}

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

	pool, err := pgxmock.NewPool()
	if err != nil {
		t.Fatalf("failed to open pgxmock database: %v", err)
	}
	queries := repository.New(pool)
	db := &database.Connection{
		Queries: queries,
		Pool:    pool,
	}
	svc := New(db)

	q := Query{
		ID:   uuid.New(),
		Type: queryprocessor.TypeJsonExtractor,
	}
	create := &queryprocessor.Create{
		Type: q.Type,
	}

	dbType, err := queryprocessor.ToDBQueryType(create.Type)
	assert.Nil(t, err)

	pool.ExpectBeginTx(pgx.TxOptions{})
	pool.ExpectQuery("name: CreateQuery :one").WithArgs(dbType).WillReturnRows(
		pgxmock.NewRows([]string{"id"}).
			AddRow(database.MustToDBUUID(q.ID)),
	)
	pool.ExpectCommit()

	id, err := svc.submitCreate(ctx, create)
	assert.Nil(t, err)
	assert.Equal(t, q.ID, id)
}

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

	pool, err := pgxmock.NewPool()
	if err != nil {
		t.Fatalf("failed to open pgxmock database: %v", err)
	}
	queries := repository.New(pool)
	db := &database.Connection{
		Queries: queries,
		Pool:    pool,
	}
	svc := New(db)

	create := &queryprocessor.Create{
		Type:             queryprocessor.TypeJsonExtractor,
		RequiredQueryIDs: &[]uuid.UUID{},
	}

	dbids := database.MustToDBUUIDArray(*create.RequiredQueryIDs)

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

	err = svc.normalizeCreate(ctx, create)
	assert.Nil(t, err)
	assert.EqualExportedValues(t, queryprocessor.Create{
		Type:             queryprocessor.TypeJsonExtractor,
		Config:           nil,
		RequiredQueryIDs: nil,
	}, *create)
}