package handler

import (
	"net/http"
	"testing"

	"github.com/gin-gonic/gin"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"gorm.io/gorm"

	"github.com/wangjia/jiu/backend/internal/middleware"
	"github.com/wangjia/jiu/backend/internal/model"
	"github.com/wangjia/jiu/backend/internal/service"
	"github.com/wangjia/jiu/backend/testutil"
)

// setupSessionSecurityRouter 挂 JWT 中间件 + 用户管理路由 + 一个受保护 GET，
// 用于验证「改密/禁用即时下线」与中间件对 is_active 的兜底校验。
func setupSessionSecurityRouter(db *gorm.DB) *gin.Engine {
	userH := NewUserHandler(db)
	r := gin.New()
	r.Use(gin.Recovery())
	api := r.Group("/api/v1")
	api.Use(middleware.JWT(db))
	api.GET("/ping", func(c *gin.Context) { c.JSON(http.StatusOK, gin.H{"ok": true}) })
	users := api.Group("/users")
	users.PUT("/:id", userH.Update)
	users.PUT("/:id/reset-password", userH.ResetPassword)
	return r
}

// #2 管理员重置某用户密码 → 该用户全部活跃会话立即失效。
func TestResetPassword_RevokesUserSessions(t *testing.T) {
	db := testutil.SetupTestDB()
	shop := testutil.CreateTestShop(db, "SEC01")
	admin := testutil.CreateTestUser(db, shop.ID, "admin", "password123", "admin")
	target := testutil.CreateTestUser(db, shop.ID, "clerk", "password123", "operator")
	r := setupSessionSecurityRouter(db)
	svc := service.NewAuthService(db)

	// 目标用户登录，拿到带 sid 的 access token（建出真实会话行）。
	pair, _, err := svc.Login("SEC01", "clerk", "password123", service.DeviceInfo{Platform: "windows"})
	require.NoError(t, err)
	targetToken := pair.AccessToken

	// 改密前：目标 token 可用。
	require.Equal(t, http.StatusOK, makeRequest(r, "GET", "/api/v1/ping", targetToken, nil).Code)

	// 管理员重置目标用户密码。
	adminToken := getAuthToken(admin.ID, shop.ID, "admin")
	w := makeRequest(r, "PUT", "/api/v1/users/2/reset-password", adminToken, jsonBody("password", "newpass123"))
	require.Equal(t, http.StatusOK, w.Code)

	// 改密后：目标 token 立即 401 SESSION_REVOKED。
	w = makeRequest(r, "GET", "/api/v1/ping", targetToken, nil)
	assert.Equal(t, http.StatusUnauthorized, w.Code)
	assert.Equal(t, "SESSION_REVOKED", parseResponse(w)["code"])

	// 会话审计字段。
	var sess model.UserSession
	require.NoError(t, db.Where("user_id = ?", target.ID).First(&sess).Error)
	assert.Equal(t, "pwd_reset", sess.RevokedReason)
	require.NotNil(t, sess.RevokedBy)
	assert.Equal(t, admin.ID, *sess.RevokedBy)
}

// #3 管理员停用某用户 → 该用户活跃会话被吊销，原 token 立即 401。
func TestDisableUser_RevokesSessions(t *testing.T) {
	db := testutil.SetupTestDB()
	shop := testutil.CreateTestShop(db, "SEC02")
	admin := testutil.CreateTestUser(db, shop.ID, "admin", "password123", "admin")
	target := testutil.CreateTestUser(db, shop.ID, "clerk", "password123", "operator")
	r := setupSessionSecurityRouter(db)
	svc := service.NewAuthService(db)

	pair, _, err := svc.Login("SEC02", "clerk", "password123", service.DeviceInfo{Platform: "windows"})
	require.NoError(t, err)
	targetToken := pair.AccessToken

	adminToken := getAuthToken(admin.ID, shop.ID, "admin")
	w := makeRequest(r, "PUT", "/api/v1/users/2", adminToken, jsonBody("is_active", false))
	require.Equal(t, http.StatusOK, w.Code)

	w = makeRequest(r, "GET", "/api/v1/ping", targetToken, nil)
	assert.Equal(t, http.StatusUnauthorized, w.Code)
	assert.Equal(t, "SESSION_REVOKED", parseResponse(w)["code"])

	var sess model.UserSession
	require.NoError(t, db.Where("user_id = ?", target.ID).First(&sess).Error)
	assert.Equal(t, "disabled", sess.RevokedReason)
}

// #3 兜底：直接改库把 is_active=0（不动会话）→ 中间件 JOIN 校验返回 401 USER_DISABLED。
func TestMiddleware_RejectsDisabledUserOnDirectDBFlip(t *testing.T) {
	db := testutil.SetupTestDB()
	shop := testutil.CreateTestShop(db, "SEC03")
	target := testutil.CreateTestUser(db, shop.ID, "clerk", "password123", "operator")
	r := setupSessionSecurityRouter(db)
	svc := service.NewAuthService(db)

	pair, _, err := svc.Login("SEC03", "clerk", "password123", service.DeviceInfo{Platform: "windows"})
	require.NoError(t, err)
	targetToken := pair.AccessToken
	require.Equal(t, http.StatusOK, makeRequest(r, "GET", "/api/v1/ping", targetToken, nil).Code)

	// 绕过 handler 直接改库：会话仍为活跃（revoked_at 为空），仅 is_active=0。
	require.NoError(t, db.Exec("UPDATE users SET is_active = 0 WHERE id = ?", target.ID).Error)

	w := makeRequest(r, "GET", "/api/v1/ping", targetToken, nil)
	assert.Equal(t, http.StatusUnauthorized, w.Code)
	assert.Equal(t, "USER_DISABLED", parseResponse(w)["code"])

	// 会话本身未被吊销，证明拦截来自中间件对 is_active 的兜底校验。
	var sess model.UserSession
	require.NoError(t, db.Where("user_id = ?", target.ID).First(&sess).Error)
	assert.Nil(t, sess.RevokedAt)
}