package authlogic

import (
	"crypto/sha256"
	"encoding/hex"
	"testing"
)

func TestHashPassword(t *testing.T) {
	tests := []struct {
		name     string
		password string
		want     string
	}{
		{
			name:     "空密码",
			password: "",
			want:     "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
		},
		{
			name:     "简单密码",
			password: "123456",
			want:     "8d969eef6ecad3c29a3a629280e686cf0c3f5d5a86aff3ca12020c923adc6c92",
		},
		{
			name:     "复杂密码",
			password: "MyP@ssw0rd!",
			want:     "e493c394a28652900d73f0fc7e6713840b1af0ab1f3fd9c5878d82e5f753c6c1",
		},
		{
			name:     "中文字符",
			password: "密码123",
			want:     "5a75e520515bf7695cd356454c4edb05ce925e230acf6c881701b7b8444dcbed",
		},
		{
			name:     "特殊字符",
			password: "!@#$%^&*()",
			want:     "95ce789c5c9d18490972709838ca3a9719094bca3ac16332cfec0652b0236141",
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			got := hashPassword(tt.password)
			if got != tt.want {
				t.Errorf("hashPassword() = %v, want %v", got, tt.want)
			}
		})
	}
}

// 测试hashPassword函数的确定性（相同输入总是产生相同输出）
func TestHashPasswordDeterministic(t *testing.T) {
	password := "testPassword123"

	// 多次调用应该产生相同的结果
	result1 := hashPassword(password)
	result2 := hashPassword(password)
	result3 := hashPassword(password)

	if result1 != result2 || result2 != result3 {
		t.Errorf("hashPassword() 不是确定性的: %v, %v, %v", result1, result2, result3)
	}
}

// 测试hashPassword函数的输出格式
func TestHashPasswordFormat(t *testing.T) {
	password := "test"
	result := hashPassword(password)

	// 检查输出是否为64个字符的十六进制字符串
	if len(result) != 64 {
		t.Errorf("hashPassword() 输出长度不正确: got %d, want 64", len(result))
	}

	// 检查是否为有效的十六进制字符串
	_, err := hex.DecodeString(result)
	if err != nil {
		t.Errorf("hashPassword() 输出不是有效的十六进制字符串: %v", err)
	}
}

// 基准测试
func BenchmarkHashPassword(b *testing.B) {
	password := "benchmarkPassword123"

	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		hashPassword(password)
	}
}

// 验证我们的实现与标准库的一致性
func TestHashPasswordConsistency(t *testing.T) {
	password := "consistencyTest"

	// 使用我们的函数
	ourResult := hashPassword(password)

	// 手动计算SHA256
	h := sha256.New()
	h.Write([]byte(password))
	expectedResult := hex.EncodeToString(h.Sum(nil))

	if ourResult != expectedResult {
		t.Errorf("hashPassword() 与标准库不一致: got %v, want %v", ourResult, expectedResult)
	}
}