package handler

import (
	"fmt"
	"net/http"
	"testing"
	"time"

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

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

// Trend：近 N 月按 order_date 聚合出库(in)/入库(out)金额，多租户隔离
func TestFinanceHandler_Trend(t *testing.T) {
	db := testutil.SetupTestDB()
	shop := testutil.CreateTestShop(db, "FIN001")
	other := testutil.CreateTestShop(db, "FIN001B")
	user := testutil.CreateTestUser(db, shop.ID, "admin", "pass", "admin")
	warehouse := testutil.CreateTestWarehouse(db, shop.ID, "Main")
	token := getAuthToken(user.ID, shop.ID, "admin")
	r := setupProtectedRouter(db)

	now := time.Now()
	thisMonth := time.Date(now.Year(), now.Month(), 5, 0, 0, 0, 0, time.UTC)
	lastMonth := thisMonth.AddDate(0, -1, 0)

	mkOut := func(shopID uint64, date time.Time, amount float64) {
		require.NoError(t, db.Create(&model.StockOutOrder{
			TenantBase:  model.TenantBase{ShopID: shopID},
			OrderNo:     fmt.Sprintf("CK-%d-%d", shopID, time.Now().UnixNano()),
			WarehouseID: warehouse.ID,
			OperatorID:  user.ID,
			Status:      "approved",
			OrderDate:   model.Date{Time: date},
			SaleTotal:   amount,
		}).Error)
	}
	mkIn := func(shopID uint64, date time.Time, amount float64) {
		require.NoError(t, db.Create(&model.StockInOrder{
			TenantBase:  model.TenantBase{ShopID: shopID},
			OrderNo:     fmt.Sprintf("RK-%d-%d", shopID, time.Now().UnixNano()),
			WarehouseID: warehouse.ID,
			OperatorID:  user.ID,
			Status:      "approved",
			OrderDate:   model.Date{Time: date},
			CostTotal:   amount,
		}).Error)
	}
	mkOut(shop.ID, thisMonth, 1000)
	mkOut(shop.ID, thisMonth, 860)
	mkOut(shop.ID, lastMonth, 500)
	mkIn(shop.ID, thisMonth, 700)
	mkOut(other.ID, thisMonth, 99999) // 别店数据不得串店

	w := makeRequest(r, "GET", "/api/v1/finance/trend?months=2", token, nil)
	require.Equal(t, http.StatusOK, w.Code)
	data := parseResponse(w)["data"].([]interface{})
	require.Len(t, data, 2)

	prev := data[0].(map[string]interface{})
	cur := data[1].(map[string]interface{})
	assert.Equal(t, lastMonth.Format("2006-01"), prev["month"])
	assert.Equal(t, float64(500), prev["in"])
	assert.Equal(t, float64(0), prev["out"])
	assert.Equal(t, thisMonth.Format("2006-01"), cur["month"])
	assert.Equal(t, float64(1860), cur["in"])
	assert.Equal(t, float64(700), cur["out"])
}

// ListRecords 日期区间：start_date/end_date 过滤 record_date（区间优先于 month）
func TestFinanceHandler_ListRecords_DateRange(t *testing.T) {
	db := testutil.SetupTestDB()
	shop := testutil.CreateTestShop(db, "FIN002")
	user := testutil.CreateTestUser(db, shop.ID, "admin", "pass", "admin")
	token := getAuthToken(user.ID, shop.ID, "admin")
	r := setupProtectedRouter(db)

	mk := func(date string, amount float64) {
		d, err := time.Parse("2006-01-02", date)
		require.NoError(t, err)
		require.NoError(t, db.Create(&model.FinanceRecord{
			ShopID:     shop.ID,
			Type:       "receipt",
			Amount:     amount,
			Status:     "closed",
			OperatorID: user.ID,
			RecordDate: d,
		}).Error)
	}
	mk("2026-04-10", 100)
	mk("2026-05-15", 200)
	mk("2026-06-20", 300)

	// 区间 [2026-05-01, 2026-06-30] → 命中 2 条
	w := makeRequest(r, "GET",
		"/api/v1/finance/records?start_date=2026-05-01&end_date=2026-06-30", token, nil)
	require.Equal(t, http.StatusOK, w.Code)
	assert.Equal(t, float64(2), parseResponse(w)["total"].(float64))

	// 只给 start → 下界过滤
	w = makeRequest(r, "GET",
		"/api/v1/finance/records?start_date=2026-06-01", token, nil)
	assert.Equal(t, float64(1), parseResponse(w)["total"].(float64))

	// 区间优先于 month（month 会被忽略）
	w = makeRequest(r, "GET",
		"/api/v1/finance/records?start_date=2026-04-01&end_date=2026-04-30&month=2026-06",
		token, nil)
	assert.Equal(t, float64(1), parseResponse(w)["total"].(float64))
}