package jsonextractor_test

import (
	"context"
	"fmt"
	contextfull "queryorchestration/internal/contextFull"
	"queryorchestration/internal/database"
	"queryorchestration/internal/database/repository"
	jsonextractor "queryorchestration/internal/jsonExtractor"
	queryprocessor "queryorchestration/internal/queryProcessor"
	"queryorchestration/internal/result"
	"testing"

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

func TestJSONProcess(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,
	}

	extractor := jsonextractor.NewExtractor(db)

	query := &queryprocessor.Query{
		ID:               uuid.New(),
		Type:             queryprocessor.TypeJsonExtractor,
		RequiredQueryIDs: []uuid.UUID{},
		Version:          int32(1),
	}
	entryValue := "value"

	jsonString := fmt.Sprintf("{\"key\": \"%s\"}", entryValue)
	values := []result.Value{
		contextfull.NewResult(jsonString),
	}

	config := "{\"path\":\"key\"}"

	pool.ExpectQuery("name: GetQueryConfig :one").WithArgs(database.MustToDBUUID(query.ID), query.Version).
		WillReturnRows(
			pgxmock.NewRows([]string{"id", "config"}).
				AddRow(pgtype.UUID{}, []byte(config)),
		)

	value, err := extractor.Process(ctx, query, values)
	assert.Nil(t, err)
	assert.Equal(t, entryValue, value)

	entryValue = ""
	jsonString = fmt.Sprintf("{\"key\": \"%s\"}", entryValue)
	values = []result.Value{
		contextfull.NewResult(jsonString),
	}
	pool.ExpectQuery("name: GetQueryConfig :one").WithArgs(database.MustToDBUUID(query.ID), query.Version).
		WillReturnRows(
			pgxmock.NewRows([]string{"id", "config"}).
				AddRow(pgtype.UUID{}, []byte(config)),
		)

	value, err = extractor.Process(ctx, query, values)
	assert.Nil(t, err)
	assert.Equal(t, entryValue, value)

	entryValue = "1"
	jsonString = fmt.Sprintf("{\"key\": %s", entryValue)
	values = []result.Value{
		contextfull.NewResult(jsonString),
	}
	pool.ExpectQuery("name: GetQueryConfig :one").WithArgs(database.MustToDBUUID(query.ID), query.Version).
		WillReturnRows(
			pgxmock.NewRows([]string{"id", "config"}).
				AddRow(pgtype.UUID{}, []byte(config)),
		)

	value, err = extractor.Process(ctx, query, values)
	assert.Nil(t, err)
	assert.Equal(t, entryValue, value)
}

func TestJSONProcessJSON(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,
	}

	extractor := jsonextractor.NewExtractor(db)

	query := &queryprocessor.Query{
		ID:               uuid.New(),
		Type:             queryprocessor.TypeJsonExtractor,
		RequiredQueryIDs: []uuid.UUID{},
		Version:          int32(1),
	}
	entryValue := "value"

	jsonString := fmt.Sprintf("{\"key\": \"%s\"}", entryValue)
	values := []result.Value{
		contextfull.NewResult(jsonString),
	}

	config := "{\"path\":\"invalid_key\"}"

	pool.ExpectQuery("name: GetQueryConfig :one").WithArgs(database.MustToDBUUID(query.ID), query.Version).
		WillReturnRows(
			pgxmock.NewRows([]string{"id", "config"}).
				AddRow(pgtype.UUID{}, []byte(config)),
		)

	value, err := extractor.Process(ctx, query, values)
	assert.EqualError(t, err, "JSON path does not exist: invalid_key")
	assert.Empty(t, value)

	config = ""

	pool.ExpectQuery("name: GetQueryConfig :one").WithArgs(database.MustToDBUUID(query.ID), query.Version).
		WillReturnRows(
			pgxmock.NewRows([]string{"id", "config"}).
				AddRow(pgtype.UUID{}, []byte(config)),
		)

	value, err = extractor.Process(ctx, query, values)
	assert.EqualError(t, err, "unexpected end of JSON input")
	assert.Empty(t, value)

	config = "{\"path\":\"\"}"

	pool.ExpectQuery("name: GetQueryConfig :one").WithArgs(database.MustToDBUUID(query.ID), query.Version).
		WillReturnRows(
			pgxmock.NewRows([]string{"id", "config"}).
				AddRow(pgtype.UUID{}, []byte(config)),
		)

	value, err = extractor.Process(ctx, query, values)
	assert.EqualError(t, err, "JSON path does not exist: ")
	assert.Empty(t, value)

	config = "{\"path\":}"

	pool.ExpectQuery("name: GetQueryConfig :one").WithArgs(database.MustToDBUUID(query.ID), query.Version).
		WillReturnRows(
			pgxmock.NewRows([]string{"id", "config"}).
				AddRow(pgtype.UUID{}, []byte(config)),
		)

	value, err = extractor.Process(ctx, query, values)
	assert.EqualError(t, err, "invalid character '}' looking for beginning of value")
	assert.Empty(t, value)

	config = "{\"path\":\"key\"}"

	pool.ExpectQuery("name: GetQueryConfig :one").WithArgs(database.MustToDBUUID(query.ID), query.Version).
		WillReturnRows(
			pgxmock.NewRows([]string{"id", "config"}),
		)

	value, err = extractor.Process(ctx, query, values)
	assert.EqualError(t, err, "no rows in result set")
	assert.Empty(t, value)
}

func TestJSONProcessResults(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,
	}

	extractor := jsonextractor.NewExtractor(db)

	query := &queryprocessor.Query{
		ID:               uuid.New(),
		Type:             queryprocessor.TypeJsonExtractor,
		RequiredQueryIDs: []uuid.UUID{},
		Version:          int32(1),
	}

	results := []result.Value{}
	value, err := extractor.Process(ctx, query, results)
	assert.EqualError(t, err, "JSON Extraction requires 1 result")
	assert.Empty(t, value)

	results = []result.Value{
		contextfull.NewResult(""),
		contextfull.NewResult(""),
	}
	value, err = extractor.Process(ctx, query, results)
	assert.EqualError(t, err, "JSON Extraction requires 1 result")
	assert.Empty(t, value)

	results = []result.Value{
		contextfull.NewResult(""),
		contextfull.NewResult(""),
		contextfull.NewResult(""),
	}
	value, err = extractor.Process(ctx, query, results)
	assert.EqualError(t, err, "JSON Extraction requires 1 result")
	assert.Empty(t, value)
}