package middleware_test

import (
	"context"
	"database/sql"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"testing"
	"time"

	"perms-system-server/internal/consts"
	"perms-system-server/internal/middleware"
	"perms-system-server/internal/model"
	productModel "perms-system-server/internal/model/product"
	productmemberModel "perms-system-server/internal/model/productmember"
	userModel "perms-system-server/internal/model/user"
	"perms-system-server/internal/response"
	"perms-system-server/internal/testutil"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

// TC-0749: L-B 修复回归 —— jwtauthMiddleware 必须优先判定 TokenVersion 失效，
// 而不是 ProductStatus/MemberType。旧实现会在"产品已禁用"场景下先返回 403 ProductDisabled，
// 使用户被强制退出时看到无关文案；修复后 TokenVersion 不一致应返回 401 "登录状态已失效，请重新登录"。
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: L-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（L-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)
}