package pointsmall

import (
	"errors"
	"testing"

	"hfb_sys/backend/internal/database"
	"hfb_sys/backend/internal/model"
)

func TestRedeemDeductsAvailablePointsAndStock(t *testing.T) {
	db := database.NewTestDB()
	user := model.User{Phone: "13900009601", PointsAvailable: 500}
	if err := db.Create(&user).Error; err != nil {
		t.Fatalf("create user failed: %v", err)
	}
	product := model.PointsMallProduct{
		Title:                  "测试兑换码",
		Description:            "测试商品",
		RedemptionInstructions: "联系客服领取",
		PointsPrice:            100,
		Stock:                  2,
		PerUserLimit:           2,
		Status:                 "online",
	}
	if err := db.Create(&product).Error; err != nil {
		t.Fatalf("create product failed: %v", err)
	}
	repo := NewRepository(db)
	redemption, err := repo.Redeem(t.Context(), user.ID, product.ID, 2)
	if err != nil {
		t.Fatalf("redeem failed: %v", err)
	}
	if redemption.TotalPoints != 200 {
		t.Fatalf("total points = %d, want 200", redemption.TotalPoints)
	}
	var savedUser model.User
	if err := db.First(&savedUser, user.ID).Error; err != nil {
		t.Fatalf("find user failed: %v", err)
	}
	if savedUser.PointsAvailable != 300 || savedUser.RenterGrowthPoints != 0 {
		t.Fatalf("points after redeem = available %d lifetime %d", savedUser.PointsAvailable, savedUser.RenterGrowthPoints)
	}
	var savedProduct model.PointsMallProduct
	if err := db.First(&savedProduct, product.ID).Error; err != nil {
		t.Fatalf("find product failed: %v", err)
	}
	if savedProduct.Stock != 0 || savedProduct.RedeemedCount != 2 {
		t.Fatalf("product stock/redeemed = %d/%d", savedProduct.Stock, savedProduct.RedeemedCount)
	}
	if _, err := repo.Redeem(t.Context(), user.ID, product.ID, 1); !errors.Is(err, ErrRedeemLimitExceeded) && !errors.Is(err, ErrProductUnavailable) {
		t.Fatalf("repeat redeem error = %v, want limit or unavailable", err)
	}
	completed, err := repo.CompleteRedemption(t.Context(), 99, redemption.ID, "已发放")
	if err != nil {
		t.Fatalf("complete redemption failed: %v", err)
	}
	if completed.Status != "completed" {
		t.Fatalf("redemption status = %s, want completed", completed.Status)
	}
}