// Package convertx provides type conversion helpers with default-value
// fallback, built on top of gconv.
//
// Note: gconv silently returns the zero value when conversion fails, so the
// helpers here only fall back to the default for nil / blank-string inputs.
// Pass pre-validated data when strict conversion is required.
package convertx

import (
	"strings"

	"github.com/gogf/gf/v2/util/gconv"
)

// ToInt converts v to int, returning def when v is nil or a blank string.
func ToInt(v any, def int) int {
	if isEmpty(v) {
		return def
	}
	return gconv.Int(v)
}

// ToInt64 converts v to int64, returning def when v is nil or a blank string.
func ToInt64(v any, def int64) int64 {
	if isEmpty(v) {
		return def
	}
	return gconv.Int64(v)
}

// ToFloat64 converts v to float64, returning def when v is nil or a blank string.
func ToFloat64(v any, def float64) float64 {
	if isEmpty(v) {
		return def
	}
	return gconv.Float64(v)
}

// ToString converts v to string, returning def when v is nil.
func ToString(v any, def string) string {
	if v == nil {
		return def
	}
	return gconv.String(v)
}

// ToBool converts v to bool, returning def when v is nil or a blank string.
func ToBool(v any, def bool) bool {
	if isEmpty(v) {
		return def
	}
	return gconv.Bool(v)
}

// isEmpty reports whether v is nil or a blank string.
func isEmpty(v any) bool {
	if v == nil {
		return true
	}
	if s, ok := v.(string); ok {
		return strings.TrimSpace(s) == ""
	}
	return false
}