package usecase

import (
	"testing"

	"github.com/go-playground/assert/v2"
	"github.com/shopspring/decimal"
)

// 測試 Int64Ptr 函數
func TestInt64Ptr(t *testing.T) {
	tests := []struct {
		name string
		val  int64
		want *int64
	}{
		{
			name: "non-zero value",
			val:  123,
			want: func() *int64 { v := int64(123); return &v }(),
		},
		{
			name: "zero value",
			val:  0,
			want: nil,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			got := Int64Ptr(tt.val)
			assert.Equal(t, tt.want, got)
		})
	}
}

// 測試 DecimalToStringPtr 函數
func TestDecimalToStringPtr(t *testing.T) {
	tests := []struct {
		name string
		val  *decimal.Decimal
		want *string
	}{
		{
			name: "non-nil decimal",
			val:  func() *decimal.Decimal { d := decimal.NewFromFloat(123.45); return &d }(),
			want: func() *string { s := "123.45"; return &s }(),
		},
		{
			name: "nil decimal",
			val:  nil,
			want: nil,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			got := DecimalToStringPtr(tt.val)
			assert.Equal(t, tt.want, got)
		})
	}
}

// 測試 StringPtr 函數
func TestStringPtr(t *testing.T) {
	tests := []struct {
		name string
		val  string
		want *string
	}{
		{
			name: "non-empty string",
			val:  "test",
			want: func() *string { s := "test"; return &s }(),
		},
		{
			name: "empty string",
			val:  "",
			want: nil,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			got := StringPtr(tt.val)
			assert.Equal(t, tt.want, got)
		})
	}
}