package api

//go:generate go run github.com/deepmap/oapi-codegen/v2/cmd/oapi-codegen --config=api.cfg.yaml ../../docs/openapi.yaml
import (
	"database/sql"
	"errors"
	"log"
	"net/http"
	"reflect"

	"github.com/labstack/echo/v4"
	openapi_types "github.com/oapi-codegen/runtime/types"
)

type PersonalFinanceImpl struct {
	db *sql.DB
}

func (*PersonalFinanceImpl) GetBanks(ctx echo.Context) error {
	return echo.NewHTTPError(http.StatusNotImplemented)
}

func (*PersonalFinanceImpl) GetBanksById(ctx echo.Context, bankId int64) error {
	return echo.NewHTTPError(http.StatusNotImplemented)
}

func (pf *PersonalFinanceImpl) GetTransactions(ctx echo.Context, params GetTransactionsParams) error {
	rows, err := pf.db.Query("SELECT t.id, t.date, t.description, t.amount, tc.category FROM pfbudget.transactions t LEFT JOIN pfbudget.transactions_categorized tc ON t.id = tc.id")
	if err != nil {
		log.Fatal(err)
	}

	return ctx.JSON(http.StatusOK, convert[Transaction](rows))
}

func (*PersonalFinanceImpl) GetTransactionsById(ctx echo.Context, transactionId int64) error {
	return echo.NewHTTPError(http.StatusNotImplemented)
}

func convert[T any](rows *sql.Rows) []T {
	var ans []T
	for rows.Next() {
		var r T
		s := reflect.ValueOf(&r).Elem()
		log.Println(s)

		numCols := s.NumField()
		columns := make([]interface{}, numCols)
		log.Println(columns)

		for i := 0; i < numCols; i++ {
			field := s.Field(i)
			columns[i] = field.Addr().Interface()
		}

		if err := rows.Scan(columns...); err != nil {
			log.Fatal(err)
		}

		ans = append(ans, r)
	}
	return ans
}

func (d *openapi_types.Date) Scan(value interface{}) error {
	if value == nil {
		return errors.New("Null date")
	}

	// if bv, err := driver.
}