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/testutil"
)

func setupShopRouter(db *gorm.DB) *gin.Engine {
	shopH := NewShopHandler(db)
	r := gin.New()
	r.Use(gin.Recovery())
	api := r.Group("/api/v1")
	api.Use(middleware.JWT(db))
	shop := api.Group("/shop")
	shop.GET("/info", shopH.GetInfo)
	shop.PUT("/info", shopH.UpdateInfo)
	return r
}

// TestUpdateInfo_MergesCustomFields 钉死「设为默认」依赖的契约：
// 传 custom_fields 会 merge 进本店已有 custom_fields（保留旧键），且只动本店。
func TestUpdateInfo_MergesCustomFields(t *testing.T) {
	gin.SetMode(gin.TestMode)
	db := testutil.SetupTestDB()
	shop := testutil.CreateTestShop(db, "S_CF1")
	admin := testutil.CreateTestUser(db, shop.ID, "admin", "pw", "admin")
	// 预置已有 custom_fields，验证 merge 不抹掉其它键
	require.NoError(t, db.Model(&model.Shop{}).Where("id = ?", shop.ID).
		Update("custom_fields", model.JSON{"foo": "bar"}).Error)
	// 另一店做隔离对照
	other := testutil.CreateTestShop(db, "S_CF2")
	require.NoError(t, db.Model(&model.Shop{}).Where("id = ?", other.ID).
		Update("custom_fields", model.JSON{"x": "y"}).Error)

	r := setupShopRouter(db)
	token := getAuthToken(admin.ID, shop.ID, "admin")
	w := makeRequest(r, http.MethodPut, "/api/v1/shop/info", token, jsonBody(
		"name", "改名后",
		"custom_fields", map[string]interface{}{"default_series_id": 7},
	))
	assert.Equal(t, http.StatusOK, w.Code)

	var got model.Shop
	require.NoError(t, db.First(&got, shop.ID).Error)
	assert.Equal(t, "改名后", got.Name)
	assert.Equal(t, "bar", got.CustomFields["foo"])                 // 旧键保留
	assert.EqualValues(t, 7, got.CustomFields["default_series_id"]) // 新键写入

	// 隔离：另一店的 custom_fields 不受影响
	var o model.Shop
	require.NoError(t, db.First(&o, other.ID).Error)
	assert.Equal(t, "y", o.CustomFields["x"])
	_, leaked := o.CustomFields["default_series_id"]
	assert.False(t, leaked)
}