package middleware_test

import (
	"context"
	"crypto/hmac"
	"crypto/sha256"
	"database/sql"
	"encoding/base64"
	"encoding/json"
	"github.com/golang-jwt/jwt/v4"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"github.com/zeromicro/go-zero/core/stores/redis"
	"github.com/zeromicro/go-zero/rest/httpx"
	"net/http"
	"net/http/httptest"
	"perms-system-server/internal/consts"
	"perms-system-server/internal/loaders"
	"perms-system-server/internal/middleware"
	"perms-system-server/internal/model"
	productModel "perms-system-server/internal/model/product"
	productmemberModel "perms-system-server/internal/model/productmember"
	"perms-system-server/internal/model/user"
	userModel "perms-system-server/internal/model/user"
	"perms-system-server/internal/response"
	"perms-system-server/internal/testutil"
	"testing"
	"time"
)

const testAccessSecret = "test-middleware-secret"

func generateTestToken(secret string, expireSeconds int64, claims *middleware.Claims) string {
	now := time.Now()
	claims.RegisteredClaims = jwt.RegisteredClaims{
		ExpiresAt: jwt.NewNumericDate(now.Add(time.Duration(expireSeconds) * time.Second)),
		IssuedAt:  jwt.NewNumericDate(now),
	}
	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
	tokenStr, _ := token.SignedString([]byte(secret))
	return tokenStr
}

func newTestMiddleware() (*middleware.JwtAuthMiddleware, *loaders.UserDetailsLoader) {
	cfg := testutil.GetTestConfig()
	conn := testutil.GetTestSqlConn()
	models := model.NewModels(conn, testutil.GetTestCacheConf(), testutil.GetTestCachePrefix())
	rds := redis.MustNewRedis(cfg.CacheRedis.Nodes[0].RedisConf)
	loader := loaders.NewUserDetailsLoader(rds, testutil.GetTestCachePrefix(), models)
	m := middleware.NewJwtAuthMiddleware(testAccessSecret, loader)
	return m, loader
}

func createTestUser(t *testing.T, username string) (int64, func()) {
	t.Helper()
	ctx := context.Background()
	conn := testutil.GetTestSqlConn()
	models := model.NewModels(conn, testutil.GetTestCacheConf(), testutil.GetTestCachePrefix())

	now := time.Now().Unix()
	u := &user.SysUser{
		Username:           username,
		Password:           testutil.HashPassword("test123"),
		Nickname:           "test_nick",
		Avatar:             sql.NullString{Valid: false},
		Email:              "test@example.com",
		Phone:              "13800000000",
		Remark:             "",
		DeptId:             0,
		IsSuperAdmin:       consts.IsSuperAdminNo,
		MustChangePassword: consts.MustChangePasswordNo,
		Status:             consts.StatusEnabled,
		CreateTime:         now,
		UpdateTime:         now,
	}
	result, err := models.SysUserModel.Insert(ctx, u)
	require.NoError(t, err)
	userId, err := result.LastInsertId()
	require.NoError(t, err)

	cleanup := func() {
		testutil.CleanTable(ctx, conn, "sys_user", userId)
	}
	return userId, cleanup
}

func init() {
	response.Setup()
}

// TC-0258: `Authorization: Bearer {valid}`
func TestJwtAuthMiddleware_Handle(t *testing.T) {
	m, _ := newTestMiddleware()

	t.Run("valid token", func(t *testing.T) {
		username := "mw_valid_" + testutil.UniqueId()
		userId, cleanup := createTestUser(t, username)
		defer cleanup()

		tokenStr := generateTestToken(testAccessSecret, 3600, &middleware.Claims{
			TokenType:   consts.TokenTypeAccess,
			UserId:      userId,
			Username:    username,
			ProductCode: "",
		})

		var capturedCtx context.Context
		handler := m.Handle(func(w http.ResponseWriter, r *http.Request) {
			capturedCtx = r.Context()
			w.WriteHeader(http.StatusOK)
		})

		req := httptest.NewRequest(http.MethodPost, "/test", nil)
		req.Header.Set("Authorization", "Bearer "+tokenStr)
		rr := httptest.NewRecorder()
		handler.ServeHTTP(rr, req)

		assert.Equal(t, http.StatusOK, rr.Code)
		assert.Equal(t, userId, middleware.GetUserId(capturedCtx))
		assert.Equal(t, "", middleware.GetProductCode(capturedCtx))
		details := middleware.GetUserDetails(capturedCtx)
		require.NotNil(t, details)
		assert.Equal(t, username, details.Username)
		assert.Equal(t, "", details.MemberType)
		assert.False(t, details.IsSuperAdmin)
	})

	t.Run("no authorization header", func(t *testing.T) {
		handler := m.Handle(func(w http.ResponseWriter, r *http.Request) {
			t.Fatal("should not reach handler")
		})

		req := httptest.NewRequest(http.MethodPost, "/test", nil)
		rr := httptest.NewRecorder()
		handler.ServeHTTP(rr, req)

		var body response.Body
		err := json.Unmarshal(rr.Body.Bytes(), &body)
		require.NoError(t, err)
		assert.Equal(t, 401, body.Code)
		assert.Equal(t, "未登录", body.Msg)
	})

	t.Run("no Bearer prefix", func(t *testing.T) {
		handler := m.Handle(func(w http.ResponseWriter, r *http.Request) {
			t.Fatal("should not reach handler")
		})

		req := httptest.NewRequest(http.MethodPost, "/test", nil)
		req.Header.Set("Authorization", "Basic some-token")
		rr := httptest.NewRecorder()
		handler.ServeHTTP(rr, req)

		var body response.Body
		err := json.Unmarshal(rr.Body.Bytes(), &body)
		require.NoError(t, err)
		assert.Equal(t, 401, body.Code)
		assert.Equal(t, "token格式错误", body.Msg)
	})

	t.Run("invalid token", func(t *testing.T) {
		handler := m.Handle(func(w http.ResponseWriter, r *http.Request) {
			t.Fatal("should not reach handler")
		})

		req := httptest.NewRequest(http.MethodPost, "/test", nil)
		req.Header.Set("Authorization", "Bearer invalid-token-string")
		rr := httptest.NewRecorder()
		handler.ServeHTTP(rr, req)

		var body response.Body
		err := json.Unmarshal(rr.Body.Bytes(), &body)
		require.NoError(t, err)
		assert.Equal(t, 401, body.Code)
		assert.Equal(t, "token无效或已过期", body.Msg)
	})

	t.Run("wrong secret", func(t *testing.T) {
		tokenStr := generateTestToken("wrong-secret", 3600, &middleware.Claims{
			TokenType: consts.TokenTypeAccess,
			UserId:    1,
		})
		handler := m.Handle(func(w http.ResponseWriter, r *http.Request) {
			t.Fatal("should not reach handler")
		})

		req := httptest.NewRequest(http.MethodPost, "/test", nil)
		req.Header.Set("Authorization", "Bearer "+tokenStr)
		rr := httptest.NewRecorder()
		handler.ServeHTTP(rr, req)

		var body response.Body
		err := json.Unmarshal(rr.Body.Bytes(), &body)
		require.NoError(t, err)
		assert.Equal(t, 401, body.Code)
		assert.Equal(t, "token无效或已过期", body.Msg)
	})

	t.Run("expired token", func(t *testing.T) {
		tokenStr := generateTestToken(testAccessSecret, -10, &middleware.Claims{
			TokenType: consts.TokenTypeAccess,
			UserId:    1,
		})
		handler := m.Handle(func(w http.ResponseWriter, r *http.Request) {
			t.Fatal("should not reach handler")
		})

		req := httptest.NewRequest(http.MethodPost, "/test", nil)
		req.Header.Set("Authorization", "Bearer "+tokenStr)
		rr := httptest.NewRecorder()
		handler.ServeHTTP(rr, req)

		var body response.Body
		err := json.Unmarshal(rr.Body.Bytes(), &body)
		require.NoError(t, err)
		assert.Equal(t, 401, body.Code)
		assert.Equal(t, "token无效或已过期", body.Msg)
	})

	// TC-0264: refresh token 不应被中间件接受
	t.Run("refresh token rejected", func(t *testing.T) {
		tokenStr := generateTestToken(testAccessSecret, 3600, &middleware.Claims{
			TokenType: consts.TokenTypeRefresh,
			UserId:    100,
		})
		handler := m.Handle(func(w http.ResponseWriter, r *http.Request) {
			t.Fatal("should not reach handler")
		})

		req := httptest.NewRequest(http.MethodPost, "/test", nil)
		req.Header.Set("Authorization", "Bearer "+tokenStr)
		rr := httptest.NewRecorder()
		handler.ServeHTTP(rr, req)

		var body response.Body
		err := json.Unmarshal(rr.Body.Bytes(), &body)
		require.NoError(t, err)
		assert.Equal(t, 401, body.Code)
		assert.Equal(t, "token无效或类型错误", body.Msg)
	})

	t.Run("frozen user rejected", func(t *testing.T) {
		username := "mw_frozen_" + testutil.UniqueId()
		userId, cleanup := createTestUser(t, username)
		defer cleanup()

		ctx := context.Background()
		conn := testutil.GetTestSqlConn()
		now := time.Now().Unix()
		models := model.NewModels(conn, testutil.GetTestCacheConf(), testutil.GetTestCachePrefix())
		err := models.SysUserModel.Update(ctx, &user.SysUser{
			Id:                 userId,
			Username:           username,
			Password:           testutil.HashPassword("test123"),
			Nickname:           "test_nick",
			Avatar:             sql.NullString{Valid: false},
			Email:              "test@example.com",
			Phone:              "13800000000",
			DeptId:             0,
			IsSuperAdmin:       consts.IsSuperAdminNo,
			MustChangePassword: consts.MustChangePasswordNo,
			Status:             consts.StatusDisabled,
			CreateTime:         now,
			UpdateTime:         now,
		})
		require.NoError(t, err)

		tokenStr := generateTestToken(testAccessSecret, 3600, &middleware.Claims{
			TokenType:   consts.TokenTypeAccess,
			UserId:      userId,
			Username:    username,
			ProductCode: "",
		})

		handler := m.Handle(func(w http.ResponseWriter, r *http.Request) {
			t.Fatal("should not reach handler")
		})

		req := httptest.NewRequest(http.MethodPost, "/test", nil)
		req.Header.Set("Authorization", "Bearer "+tokenStr)
		rr := httptest.NewRecorder()
		handler.ServeHTTP(rr, req)

		var body response.Body
		err = json.Unmarshal(rr.Body.Bytes(), &body)
		require.NoError(t, err)
		assert.Equal(t, 403, body.Code)
		assert.Equal(t, "账号已被冻结", body.Msg)
	})
}

// TC-0306: ctx含userId=100
func TestGetUserId(t *testing.T) {
	ctx := context.Background()
	assert.Equal(t, int64(0), middleware.GetUserId(ctx))

	ctx = middleware.WithUserDetails(ctx, &loaders.UserDetails{UserId: 42})
	assert.Equal(t, int64(42), middleware.GetUserId(ctx))

	ctx2 := context.Background()
	assert.Equal(t, int64(0), middleware.GetUserId(ctx2))
}

// TC-0275: 空ctx
func TestGetProductCode(t *testing.T) {
	ctx := context.Background()
	assert.Equal(t, "", middleware.GetProductCode(ctx))

	ctx = middleware.WithUserDetails(ctx, &loaders.UserDetails{ProductCode: "p1"})
	assert.Equal(t, "p1", middleware.GetProductCode(ctx))
}

// TC-0309: GetUserDetails 返回完整用户信息
func TestGetUserDetails(t *testing.T) {
	ctx := context.Background()
	assert.Nil(t, middleware.GetUserDetails(ctx))

	expected := &loaders.UserDetails{
		UserId:       42,
		Username:     "admin",
		ProductCode:  "p1",
		MemberType:   "ADMIN",
		IsSuperAdmin: true,
	}
	ctx = middleware.WithUserDetails(ctx, expected)
	got := middleware.GetUserDetails(ctx)
	require.NotNil(t, got)
	assert.Equal(t, expected.UserId, got.UserId)
	assert.Equal(t, expected.Username, got.Username)
	assert.Equal(t, expected.ProductCode, got.ProductCode)
	assert.Equal(t, expected.MemberType, got.MemberType)
	assert.Equal(t, expected.IsSuperAdmin, got.IsSuperAdmin)
}

// TC-0263: claims类型断言失败（防御性分支）
// jwt.ParseWithClaims(tokenStr, &Claims{}, keyFunc) 始终将 token.Claims 设为 *Claims，
// 且解析失败时 Handle 已在 err!=nil 分支提前返回，因此 !ok 分支不可达。
func TestJwtAuthMiddleware_Handle_ClaimsTypeAssertionUnreachable(t *testing.T) {
	t.Skip("defensive branch: unreachable via jwt.ParseWithClaims — claims is always *Claims")
}

// suppress unused import warning for httpx
var _ = httpx.Error

func TestJwtAuthMiddleware_TokenVersionCheckedBeforeProductStatus(t *testing.T) {
	ctx := context.Background()
	conn := testutil.GetTestSqlConn()
	models := model.NewModels(conn, testutil.GetTestCacheConf(), testutil.GetTestCachePrefix())
	now := time.Now().Unix()

	// 1) 创建"已禁用"的产品
	pCode := "mw_ord_" + testutil.UniqueId()
	pRes, err := models.SysProductModel.Insert(ctx, &productModel.SysProduct{
		Code: pCode, Name: pCode, AppKey: pCode + "_k", AppSecret: "s",
		Status: consts.StatusDisabled, CreateTime: now, UpdateTime: now,
	})
	require.NoError(t, err)
	pId, _ := pRes.LastInsertId()

	// 2) 创建启用中的用户，TokenVersion=5
	username := "mw_ord_u_" + testutil.UniqueId()
	uRes, err := models.SysUserModel.Insert(ctx, &userModel.SysUser{
		Username: username, Password: "x", Nickname: "n",
		Avatar: sql.NullString{}, IsSuperAdmin: consts.IsSuperAdminNo,
		MustChangePassword: 2, Status: consts.StatusEnabled, TokenVersion: 5,
		CreateTime: now, UpdateTime: now,
	})
	require.NoError(t, err)
	userId, _ := uRes.LastInsertId()

	// 3) 该用户是禁用产品的 ADMIN 成员
	mRes, err := models.SysProductMemberModel.Insert(ctx, &productmemberModel.SysProductMember{
		ProductCode: pCode, UserId: userId, MemberType: consts.MemberTypeAdmin,
		Status: consts.StatusEnabled, CreateTime: now, UpdateTime: now,
	})
	require.NoError(t, err)
	mId, _ := mRes.LastInsertId()

	t.Cleanup(func() {
		testutil.CleanTable(ctx, conn, "`sys_product_member`", mId)
		testutil.CleanTable(ctx, conn, "`sys_user`", userId)
		testutil.CleanTable(ctx, conn, "`sys_product`", pId)
	})

	m, _ := newTestMiddleware()

	// 携带 stale TokenVersion=3 的 access token（DB 是 5）+ 禁用产品 code
	tokenStr := generateTestToken(testAccessSecret, 3600, &middleware.Claims{
		TokenType:    consts.TokenTypeAccess,
		UserId:       userId,
		Username:     username,
		ProductCode:  pCode,
		TokenVersion: 3,
	})

	handler := m.Handle(func(w http.ResponseWriter, r *http.Request) {
		t.Fatal("should not reach handler")
	})

	req := httptest.NewRequest(http.MethodPost, "/test", nil)
	req.Header.Set("Authorization", "Bearer "+tokenStr)
	rr := httptest.NewRecorder()
	handler.ServeHTTP(rr, req)

	var body response.Body
	require.NoError(t, json.Unmarshal(rr.Body.Bytes(), &body))

	assert.Equal(t, 401, body.Code,
		"L-B：TokenVersion 失配必须先于产品禁用被识别（返回 401 而非 403）")
	assert.Equal(t, "登录状态已失效，请重新登录", body.Msg,
		"L-B：文案必须是'登录状态已失效'而不是'该产品已被禁用'，否则用户会被无关信息误导")
}

// TC-0750: -B 修复回归 —— TokenVersion 匹配但产品被禁用，仍应返回 403 "该产品已被禁用"。
// 保证修复未把所有场景都吞成 401。
func TestJwtAuthMiddleware_ProductDisabledAfterVersionOk(t *testing.T) {
	ctx := context.Background()
	conn := testutil.GetTestSqlConn()
	models := model.NewModels(conn, testutil.GetTestCacheConf(), testutil.GetTestCachePrefix())
	now := time.Now().Unix()

	pCode := "mw_ord2_" + testutil.UniqueId()
	pRes, err := models.SysProductModel.Insert(ctx, &productModel.SysProduct{
		Code: pCode, Name: pCode, AppKey: pCode + "_k", AppSecret: "s",
		Status: consts.StatusDisabled, CreateTime: now, UpdateTime: now,
	})
	require.NoError(t, err)
	pId, _ := pRes.LastInsertId()

	username := "mw_ord2_u_" + testutil.UniqueId()
	uRes, err := models.SysUserModel.Insert(ctx, &userModel.SysUser{
		Username: username, Password: "x", Nickname: "n",
		Avatar: sql.NullString{}, IsSuperAdmin: consts.IsSuperAdminNo,
		MustChangePassword: 2, Status: consts.StatusEnabled, TokenVersion: 0,
		CreateTime: now, UpdateTime: now,
	})
	require.NoError(t, err)
	userId, _ := uRes.LastInsertId()

	mRes, err := models.SysProductMemberModel.Insert(ctx, &productmemberModel.SysProductMember{
		ProductCode: pCode, UserId: userId, MemberType: consts.MemberTypeAdmin,
		Status: consts.StatusEnabled, CreateTime: now, UpdateTime: now,
	})
	require.NoError(t, err)
	mId, _ := mRes.LastInsertId()

	t.Cleanup(func() {
		testutil.CleanTable(ctx, conn, "`sys_product_member`", mId)
		testutil.CleanTable(ctx, conn, "`sys_user`", userId)
		testutil.CleanTable(ctx, conn, "`sys_product`", pId)
	})

	m, _ := newTestMiddleware()

	tokenStr := generateTestToken(testAccessSecret, 3600, &middleware.Claims{
		TokenType:    consts.TokenTypeAccess,
		UserId:       userId,
		Username:     username,
		ProductCode:  pCode,
		TokenVersion: 0,
	})

	handler := m.Handle(func(w http.ResponseWriter, r *http.Request) {
		t.Fatal("should not reach handler")
	})

	req := httptest.NewRequest(http.MethodPost, "/test", nil)
	req.Header.Set("Authorization", "Bearer "+tokenStr)
	rr := httptest.NewRecorder()
	handler.ServeHTTP(rr, req)

	var body response.Body
	require.NoError(t, json.Unmarshal(rr.Body.Bytes(), &body))
	assert.Equal(t, 403, body.Code)
	assert.Equal(t, "该产品已被禁用", body.Msg)
}

// --- 鉴权优先级完整矩阵（-B 延伸，TC-0754 ~ TC-0758）---
// 代码中顺序: Username empty -> Status disabled -> TokenVersion mismatch -> ProductStatus -> MemberType。
// 这 5 个用例用"同时踩两个坑"的组合方式, 严格断言哪个错误文案胜出, 形成鉴权优先级的冻结矩阵。

// TC-0754: 用户已被删除 + TokenVersion 失配 -> 优先返回 401 "用户不存在或已被删除"。
// 场景: 攻击者拿着 stale token + 账号已被删除, 服务端必须先识别出用户不存在而不是"登录已失效",
// 否则会把"软删除"语义泄漏成"用户登出"从而引导攻击者再次尝试重登。
func TestJwtAuthMiddleware_UserDeletedBeatsTokenVersion(t *testing.T) {
	ctx := context.Background()
	conn := testutil.GetTestSqlConn()
	models := model.NewModels(conn, testutil.GetTestCacheConf(), testutil.GetTestCachePrefix())
	now := time.Now().Unix()

	username := "mw_del_" + testutil.UniqueId()
	uRes, err := models.SysUserModel.Insert(ctx, &userModel.SysUser{
		Username: username, Password: "x", Nickname: "n",
		Avatar: sql.NullString{}, IsSuperAdmin: consts.IsSuperAdminNo,
		MustChangePassword: 2, Status: consts.StatusEnabled, TokenVersion: 5,
		CreateTime: now, UpdateTime: now,
	})
	require.NoError(t, err)
	userId, _ := uRes.LastInsertId()
	require.NoError(t, models.SysUserModel.Delete(ctx, userId))

	m, _ := newTestMiddleware()
	tokenStr := generateTestToken(testAccessSecret, 3600, &middleware.Claims{
		TokenType: consts.TokenTypeAccess, UserId: userId, Username: username,
		TokenVersion: 1,
	})

	handler := m.Handle(func(w http.ResponseWriter, r *http.Request) { t.Fatal("unreachable") })
	req := httptest.NewRequest(http.MethodPost, "/test", nil)
	req.Header.Set("Authorization", "Bearer "+tokenStr)
	rr := httptest.NewRecorder()
	handler.ServeHTTP(rr, req)

	var body response.Body
	require.NoError(t, json.Unmarshal(rr.Body.Bytes(), &body))
	assert.Equal(t, 401, body.Code,
		"L-B 矩阵: Username empty 必须在 TokenVersion 之前裁决")
	assert.Equal(t, "用户不存在或已被删除", body.Msg,
		"L-B 矩阵: 用户被删除时文案不可退化成 '登录已失效'，否则泄漏软删除语义")
}

// TC-0755: 账号被冻结 + TokenVersion 失配 + 产品被禁用 -> 胜出应是 403 "账号已被冻结"。
// 三重 failing condition 叠加, 验证"账号级"问题比"会话级"(TokenVersion) 和"产品级"(ProductStatus) 优先级更高。
func TestJwtAuthMiddleware_FrozenBeatsEverything(t *testing.T) {
	ctx := context.Background()
	conn := testutil.GetTestSqlConn()
	models := model.NewModels(conn, testutil.GetTestCacheConf(), testutil.GetTestCachePrefix())
	now := time.Now().Unix()

	pCode := "mw_fz_" + testutil.UniqueId()
	pRes, err := models.SysProductModel.Insert(ctx, &productModel.SysProduct{
		Code: pCode, Name: pCode, AppKey: pCode + "_k", AppSecret: "s",
		Status: consts.StatusDisabled, CreateTime: now, UpdateTime: now,
	})
	require.NoError(t, err)
	pId, _ := pRes.LastInsertId()

	username := "mw_fz_u_" + testutil.UniqueId()
	uRes, err := models.SysUserModel.Insert(ctx, &userModel.SysUser{
		Username: username, Password: "x", Nickname: "n",
		Avatar: sql.NullString{}, IsSuperAdmin: consts.IsSuperAdminNo,
		MustChangePassword: 2, Status: consts.StatusDisabled, TokenVersion: 9,
		CreateTime: now, UpdateTime: now,
	})
	require.NoError(t, err)
	userId, _ := uRes.LastInsertId()

	mRes, err := models.SysProductMemberModel.Insert(ctx, &productmemberModel.SysProductMember{
		ProductCode: pCode, UserId: userId, MemberType: consts.MemberTypeAdmin,
		Status: consts.StatusEnabled, CreateTime: now, UpdateTime: now,
	})
	require.NoError(t, err)
	mId, _ := mRes.LastInsertId()

	t.Cleanup(func() {
		testutil.CleanTable(ctx, conn, "`sys_product_member`", mId)
		testutil.CleanTable(ctx, conn, "`sys_user`", userId)
		testutil.CleanTable(ctx, conn, "`sys_product`", pId)
	})

	m, _ := newTestMiddleware()
	tokenStr := generateTestToken(testAccessSecret, 3600, &middleware.Claims{
		TokenType: consts.TokenTypeAccess, UserId: userId, Username: username,
		ProductCode: pCode, TokenVersion: 1,
	})

	handler := m.Handle(func(w http.ResponseWriter, r *http.Request) { t.Fatal("unreachable") })
	req := httptest.NewRequest(http.MethodPost, "/test", nil)
	req.Header.Set("Authorization", "Bearer "+tokenStr)
	rr := httptest.NewRecorder()
	handler.ServeHTTP(rr, req)

	var body response.Body
	require.NoError(t, json.Unmarshal(rr.Body.Bytes(), &body))
	assert.Equal(t, 403, body.Code,
		"L-B 矩阵: 账号冻结(403) 胜出, 而非 TokenVersion(401) 或 ProductStatus(403/禁用)")
	assert.Equal(t, "账号已被冻结", body.Msg,
		"L-B 矩阵: 冻结文案必须先于 '登录已失效'/'产品禁用' 返回给客户端")
}

// TC-0756: TokenVersion OK + 产品启用 + 非超管 + MemberType 为空 -> 403 "您已不是该产品的有效成员"。
// 场景: 用户曾是产品成员, 后被移除, 但老 token 未过期; 本用例保证"移除成员"的写路径会被读路径识别。
func TestJwtAuthMiddleware_NonMemberRejected(t *testing.T) {
	ctx := context.Background()
	conn := testutil.GetTestSqlConn()
	models := model.NewModels(conn, testutil.GetTestCacheConf(), testutil.GetTestCachePrefix())
	now := time.Now().Unix()

	pCode := "mw_nm_" + testutil.UniqueId()
	pRes, err := models.SysProductModel.Insert(ctx, &productModel.SysProduct{
		Code: pCode, Name: pCode, AppKey: pCode + "_k", AppSecret: "s",
		Status: consts.StatusEnabled, CreateTime: now, UpdateTime: now,
	})
	require.NoError(t, err)
	pId, _ := pRes.LastInsertId()

	username := "mw_nm_u_" + testutil.UniqueId()
	uRes, err := models.SysUserModel.Insert(ctx, &userModel.SysUser{
		Username: username, Password: "x", Nickname: "n",
		Avatar: sql.NullString{}, IsSuperAdmin: consts.IsSuperAdminNo,
		MustChangePassword: 2, Status: consts.StatusEnabled, TokenVersion: 0,
		CreateTime: now, UpdateTime: now,
	})
	require.NoError(t, err)
	userId, _ := uRes.LastInsertId()

	t.Cleanup(func() {
		testutil.CleanTable(ctx, conn, "`sys_user`", userId)
		testutil.CleanTable(ctx, conn, "`sys_product`", pId)
	})

	m, _ := newTestMiddleware()
	tokenStr := generateTestToken(testAccessSecret, 3600, &middleware.Claims{
		TokenType: consts.TokenTypeAccess, UserId: userId, Username: username,
		ProductCode: pCode, TokenVersion: 0,
	})

	handler := m.Handle(func(w http.ResponseWriter, r *http.Request) { t.Fatal("unreachable") })
	req := httptest.NewRequest(http.MethodPost, "/test", nil)
	req.Header.Set("Authorization", "Bearer "+tokenStr)
	rr := httptest.NewRecorder()
	handler.ServeHTTP(rr, req)

	var body response.Body
	require.NoError(t, json.Unmarshal(rr.Body.Bytes(), &body))
	assert.Equal(t, 403, body.Code)
	assert.Equal(t, "您已不是该产品的有效成员", body.Msg,
		"L-B 矩阵: MemberType 空 + 非超管 + 产品启用 必须精确命中'不是有效成员'文案")
}

// TC-0757: 超级管理员 + ProductCode 携带 + MemberType 空 -> 正常放行。
// 超管"旁路"分支不能被移除, 否则超管在产品上下文会被错误踢出。
func TestJwtAuthMiddleware_SuperAdminBypassesMemberCheck(t *testing.T) {
	ctx := context.Background()
	conn := testutil.GetTestSqlConn()
	models := model.NewModels(conn, testutil.GetTestCacheConf(), testutil.GetTestCachePrefix())
	now := time.Now().Unix()

	pCode := "mw_sa_" + testutil.UniqueId()
	pRes, err := models.SysProductModel.Insert(ctx, &productModel.SysProduct{
		Code: pCode, Name: pCode, AppKey: pCode + "_k", AppSecret: "s",
		Status: consts.StatusEnabled, CreateTime: now, UpdateTime: now,
	})
	require.NoError(t, err)
	pId, _ := pRes.LastInsertId()

	username := "mw_sa_u_" + testutil.UniqueId()
	uRes, err := models.SysUserModel.Insert(ctx, &userModel.SysUser{
		Username: username, Password: "x", Nickname: "n",
		Avatar: sql.NullString{}, IsSuperAdmin: consts.IsSuperAdminYes,
		MustChangePassword: 2, Status: consts.StatusEnabled, TokenVersion: 0,
		CreateTime: now, UpdateTime: now,
	})
	require.NoError(t, err)
	userId, _ := uRes.LastInsertId()

	t.Cleanup(func() {
		testutil.CleanTable(ctx, conn, "`sys_user`", userId)
		testutil.CleanTable(ctx, conn, "`sys_product`", pId)
	})

	m, _ := newTestMiddleware()
	tokenStr := generateTestToken(testAccessSecret, 3600, &middleware.Claims{
		TokenType: consts.TokenTypeAccess, UserId: userId, Username: username,
		ProductCode: pCode, TokenVersion: 0,
	})

	var reached bool
	handler := m.Handle(func(w http.ResponseWriter, r *http.Request) {
		reached = true
		w.WriteHeader(http.StatusOK)
	})
	req := httptest.NewRequest(http.MethodPost, "/test", nil)
	req.Header.Set("Authorization", "Bearer "+tokenStr)
	rr := httptest.NewRecorder()
	handler.ServeHTTP(rr, req)

	assert.Equal(t, http.StatusOK, rr.Code, "L-B 矩阵: 超管必须放行, 即使在产品上下文无 MemberType")
	assert.True(t, reached, "请求必须到达业务 handler")
}

// TC-0758: 无 ProductCode 时, Frozen 用户 + TokenVersion 失配 -> 403 "账号已被冻结"。
// 验证即使不走产品相关分支, Status 检查仍先于 TokenVersion 裁决。
func TestJwtAuthMiddleware_FrozenBeatsTokenVersionNoProduct(t *testing.T) {
	ctx := context.Background()
	conn := testutil.GetTestSqlConn()
	models := model.NewModels(conn, testutil.GetTestCacheConf(), testutil.GetTestCachePrefix())
	now := time.Now().Unix()

	username := "mw_fz2_u_" + testutil.UniqueId()
	uRes, err := models.SysUserModel.Insert(ctx, &userModel.SysUser{
		Username: username, Password: "x", Nickname: "n",
		Avatar: sql.NullString{}, IsSuperAdmin: consts.IsSuperAdminNo,
		MustChangePassword: 2, Status: consts.StatusDisabled, TokenVersion: 7,
		CreateTime: now, UpdateTime: now,
	})
	require.NoError(t, err)
	userId, _ := uRes.LastInsertId()
	t.Cleanup(func() { testutil.CleanTable(ctx, conn, "`sys_user`", userId) })

	m, _ := newTestMiddleware()
	tokenStr := generateTestToken(testAccessSecret, 3600, &middleware.Claims{
		TokenType: consts.TokenTypeAccess, UserId: userId, Username: username,
		TokenVersion: 0,
	})

	handler := m.Handle(func(w http.ResponseWriter, r *http.Request) { t.Fatal("unreachable") })
	req := httptest.NewRequest(http.MethodPost, "/test", nil)
	req.Header.Set("Authorization", "Bearer "+tokenStr)
	rr := httptest.NewRecorder()
	handler.ServeHTTP(rr, req)

	var body response.Body
	require.NoError(t, json.Unmarshal(rr.Body.Bytes(), &body))
	assert.Equal(t, 403, body.Code)
	assert.Equal(t, "账号已被冻结", body.Msg)
}

// 覆盖目标：ParseWithHMAC 上移到 middleware 层作为唯一入口。
// 本测试直接在 middleware 外部测试包内验证：
// (1) 正常 HS256 token 放行
// (2) alg=RS256（公钥→HMAC 共享密钥混淆）显式拒绝
// (3) alg=none 拒绝
// (4) 错误 secret 签名拒绝
// (5) 非 Claims 结构的 claims 同样正确解析（保证函数与具体 claims 类型解耦）

const ln1Secret = "ln1-centralized-secret"

func b64urlLN1(b []byte) string { return base64.RawURLEncoding.EncodeToString(b) }

func forgeTokenLN1(t *testing.T, alg string, claims any, signKey string) string {
	t.Helper()
	header := map[string]string{"alg": alg, "typ": "JWT"}
	hBytes, err := json.Marshal(header)
	require.NoError(t, err)
	pBytes, err := json.Marshal(claims)
	require.NoError(t, err)
	signingInput := b64urlLN1(hBytes) + "." + b64urlLN1(pBytes)
	mac := hmac.New(sha256.New, []byte(signKey))
	mac.Write([]byte(signingInput))
	return signingInput + "." + b64urlLN1(mac.Sum(nil))
}

func validAccessClaimsLN1() middleware.Claims {
	now := time.Now()
	return middleware.Claims{
		TokenType:    consts.TokenTypeAccess,
		UserId:       42,
		Username:     "ln1_u",
		ProductCode:  "ln1_p",
		MemberType:   consts.MemberTypeAdmin,
		TokenVersion: 0,
		RegisteredClaims: jwt.RegisteredClaims{
			ExpiresAt: jwt.NewNumericDate(now.Add(1 * time.Hour)),
			IssuedAt:  jwt.NewNumericDate(now),
		},
	}
}

// TC-1003: middleware 层 ParseWithHMAC 能正确解析合法 HS256 token。
func TestMiddlewareParseWithHMAC_LN1_HS256Valid(t *testing.T) {
	signed := jwt.NewWithClaims(jwt.SigningMethodHS256, validAccessClaimsLN1())
	tok, err := signed.SignedString([]byte(ln1Secret))
	require.NoError(t, err)

	parsed, err := middleware.ParseWithHMAC(tok, ln1Secret, &middleware.Claims{})
	require.NoError(t, err)
	require.True(t, parsed.Valid)

	claims, ok := parsed.Claims.(*middleware.Claims)
	require.True(t, ok)
	assert.Equal(t, int64(42), claims.UserId)
	assert.Equal(t, consts.TokenTypeAccess, claims.TokenType)
}

// TC-1004: middleware 层 ParseWithHMAC 必须拒绝 alg=RS256 伪造（公钥→HMAC 混淆）。
func TestMiddlewareParseWithHMAC_LN1_RS256HeaderRejected(t *testing.T) {
	forged := forgeTokenLN1(t, "RS256", validAccessClaimsLN1(), ln1Secret)
	_, err := middleware.ParseWithHMAC(forged, ln1Secret, &middleware.Claims{})
	require.Error(t, err, "必须拒绝 alg=RS256 伪造 token")
	assert.Contains(t, err.Error(), "unexpected signing method",
		"HMAC 断言失败必须产出可错误信息，方便 SOC 定位攻击尝试")
}

// TC-1005: middleware 层 ParseWithHMAC 必须拒绝 alg=none。
func TestMiddlewareParseWithHMAC_LN1_AlgNoneRejected(t *testing.T) {
	header := map[string]string{"alg": "none", "typ": "JWT"}
	hBytes, _ := json.Marshal(header)
	pBytes, _ := json.Marshal(validAccessClaimsLN1())
	forged := b64urlLN1(hBytes) + "." + b64urlLN1(pBytes) + "."

	_, err := middleware.ParseWithHMAC(forged, ln1Secret, &middleware.Claims{})
	require.Error(t, err, "alg=none 不可通过 HMAC 唯一入口")
}

// TC-1006: 错误 secret 签发的合法结构 HS256 token 必须被拒绝。
func TestMiddlewareParseWithHMAC_LN1_WrongSecretRejected(t *testing.T) {
	signed := jwt.NewWithClaims(jwt.SigningMethodHS256, validAccessClaimsLN1())
	tok, err := signed.SignedString([]byte("attacker-guess"))
	require.NoError(t, err)

	_, err = middleware.ParseWithHMAC(tok, ln1Secret, &middleware.Claims{})
	require.Error(t, err, "签名校验失败必须 fail-close")
}

// TC-1007: ParseWithHMAC 可以为任意 jwt.Claims 结构体工作（不绑 Claims 类型），
// 保证 gRPC VerifyToken、RefreshToken、HTTP 中间件等所有调用点可以共用该入口。
func TestMiddlewareParseWithHMAC_LN1_ArbitraryClaimsType(t *testing.T) {
	type customClaims struct {
		Role string `json:"role"`
		jwt.RegisteredClaims
	}
	c := customClaims{
		Role: "admin",
		RegisteredClaims: jwt.RegisteredClaims{
			ExpiresAt: jwt.NewNumericDate(time.Now().Add(time.Hour)),
			IssuedAt:  jwt.NewNumericDate(time.Now()),
		},
	}
	signed := jwt.NewWithClaims(jwt.SigningMethodHS256, c)
	tok, err := signed.SignedString([]byte(ln1Secret))
	require.NoError(t, err)

	parsed, err := middleware.ParseWithHMAC(tok, ln1Secret, &customClaims{})
	require.NoError(t, err)
	parsedClaims, ok := parsed.Claims.(*customClaims)
	require.True(t, ok)
	assert.Equal(t, "admin", parsedClaims.Role,
		"唯一入口必须对任意 claims 类型解耦，保证所有调用方可以复用")
}