package stardb

import (
	"errors"
	"fmt"
	"strconv"
)

// GetString returns column value as string with error
func (r *StarResult) GetString(name string) (string, error) {
	index, ok := r.columnIndex[name]
	if !ok {
		return "", errors.New("column not found: " + name)
	}
	return ConvertToStringSafe(r.Result()[index])
}

// GetInt64 returns column value as int64 with error
func (r *StarResult) GetInt64(name string) (int64, error) {
	index, ok := r.columnIndex[name]
	if !ok {
		return 0, errors.New("column not found: " + name)
	}
	return ConvertToInt64Safe(r.Result()[index])
}

// GetFloat64 returns column value as float64 with error
func (r *StarResult) GetFloat64(name string) (float64, error) {
	index, ok := r.columnIndex[name]
	if !ok {
		return 0, errors.New("column not found: " + name)
	}

	switch v := r.Result()[index].(type) {
	case nil:
		return 0, nil
	case float64:
		return v, nil
	case float32:
		return float64(v), nil
	case int, int32, int64, uint64:
		val, err := ConvertToInt64Safe(v)
		return float64(val), err
	case string:
		return strconv.ParseFloat(v, 64)
	case []byte:
		return strconv.ParseFloat(string(v), 64)
	default:
		return 0, fmt.Errorf("cannot convert %T to float64", v)
	}
}