package rota

import (
	"context"
	"fmt"

	"google.golang.org/api/option"
	"google.golang.org/api/sheets/v4"
)

// ReadRota czyta zadany zakres z arkusza i zwraca wiersze.
// spreadsheetID to ID z URL-a arkusza, readRange np. "Dyżury!A1:C30".
func ReadSheet(ctx context.Context, credsPath, spreadsheetID, readRange string) ([][]interface{}, error) {
	srv, err := sheets.NewService(ctx,
	  option.WithAuthCredentialsFile(option.ServiceAccount, credsPath),
	  option.WithScopes(sheets.SpreadsheetsReadonlyScope),
  )
	if err != nil {
		return nil, fmt.Errorf("init sheets service: %w", err)
	}

	resp, err := srv.Spreadsheets.Values.
		Get(spreadsheetID, readRange).
		ValueRenderOption("UNFORMATTED_VALUE"). // surowe wartości, bez formatowania komórek
		Context(ctx).
		Do()
	if err != nil {
		return nil, fmt.Errorf("get values %q: %w", readRange, err)
	}

	return resp.Values, nil
}