//go:build unit

package handler

import (
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"testing"

	"github.com/Wei-Shaw/sub2api/internal/service"

	"github.com/gin-gonic/gin"
	"github.com/stretchr/testify/require"
)

func plazaGroups() []service.PlazaGroup {
	return []service.PlazaGroup{
		{ID: 1, Name: "public-standard", Platform: "anthropic", SubscriptionType: "standard", RateMultiplier: 1},
		{ID: 2, Name: "exclusive-a", Platform: "anthropic", IsExclusive: true, RateMultiplier: 0.5},
		{ID: 3, Name: "public-subscription", Platform: "openai", SubscriptionType: "subscription", RateMultiplier: 1},
		{ID: 4, Name: "exclusive-b", Platform: "openai", IsExclusive: true, RateMultiplier: 0.8},
	}
}

func TestFilterPlazaVisibleGroups_AnonymousSeesOnlyNonExclusive(t *testing.T) {
	// 匿名(allowedExclusive == nil):仅非专属分组;订阅型公开分组照常可见(橱窗语义)。
	visible := filterPlazaVisibleGroups(plazaGroups(), nil)
	require.Len(t, visible, 2)
	ids := []int64{visible[0].ID, visible[1].ID}
	require.ElementsMatch(t, []int64{1, 3}, ids)
}

func TestFilterPlazaVisibleGroups_AuthedSeesGrantedExclusive(t *testing.T) {
	// 登录:非专属 + 授权的专属;未授权的专属仍不可见。
	allowed := map[int64]struct{}{2: {}}
	visible := filterPlazaVisibleGroups(plazaGroups(), allowed)
	require.Len(t, visible, 3)
	ids := make([]int64, 0, len(visible))
	for _, g := range visible {
		ids = append(ids, g.ID)
	}
	require.ElementsMatch(t, []int64{1, 2, 3}, ids)
}

func TestFilterPlazaVisibleGroups_AuthedEmptySetSeesNoExclusive(t *testing.T) {
	// 登录但无任何专属授权(空集合,非 nil):与匿名同样只见非专属,
	// 但语义区分要保持——空集合不能被当作 nil 匿名分支。
	visible := filterPlazaVisibleGroups(plazaGroups(), map[int64]struct{}{})
	require.Len(t, visible, 2)
}

func TestModelPlazaHandler_NilSettingServiceFailsClosed404(t *testing.T) {
	gin.SetMode(gin.TestMode)
	h := &ModelPlazaHandler{} // settingService == nil → fail-closed
	w := httptest.NewRecorder()
	c, _ := gin.CreateTestContext(w)
	c.Request = httptest.NewRequest(http.MethodGet, "/api/v1/model-plaza", nil)

	h.Get(c)

	require.Equal(t, http.StatusNotFound, w.Code)
}

func TestToModelPlazaGroupDTO_UserRateAndFieldWhitelist(t *testing.T) {
	g := service.PlazaGroup{
		ID: 2, Name: "vip", Description: "d", Platform: "anthropic",
		SubscriptionType: "standard", RateMultiplier: 1, IsExclusive: true,
		Models: []service.PlazaModel{{
			Name:     "claude-sonnet",
			Platform: "anthropic",
			Pricing: &service.ChannelModelPricing{
				BillingMode: service.BillingModeToken,
				InputPrice:  testPtr(3e-6),
			},
			OfficialPricing: &service.PlazaOfficialPricing{
				InputPrice:     testPtr(3e-6),
				CacheReadPrice: testPtr(3e-7),
			},
		}},
	}

	// 有专属倍率:user_rate_multiplier 序列化输出
	dto := toModelPlazaGroupDTO(&g, map[int64]float64{2: 0.5})
	raw, err := json.Marshal(dto)
	require.NoError(t, err)
	var decoded map[string]any
	require.NoError(t, json.Unmarshal(raw, &decoded))

	for _, key := range []string{
		"id", "name", "description", "platform", "subscription_type",
		"rate_multiplier", "user_rate_multiplier", "is_exclusive", "models",
		"peak_rate_enabled", "peak_start", "peak_end", "peak_rate_multiplier",
		"image_rate_independent", "image_rate_multiplier",
	} {
		_, exists := decoded[key]
		require.Truef(t, exists, "plaza group DTO must expose %q", key)
	}
	require.InDelta(t, 0.5, decoded["user_rate_multiplier"].(float64), 1e-9)

	// 模型条目:pricing + official_pricing 并存;official 缺失字段输出 null 而非省略
	models := decoded["models"].([]any)
	require.Len(t, models, 1)
	model := models[0].(map[string]any)
	require.Contains(t, model, "pricing")
	require.Contains(t, model, "official_pricing")
	official := model["official_pricing"].(map[string]any)
	require.Contains(t, official, "input_price")
	require.Contains(t, official, "cache_read_price")
	_, has1h := official["cache_write_1h_price"]
	require.False(t, has1h, "1h 缓存写价为 nil 时应 omitempty")

	// 无专属倍率:user_rate_multiplier 整个字段省略
	dtoNoRate := toModelPlazaGroupDTO(&g, nil)
	rawNoRate, err := json.Marshal(dtoNoRate)
	require.NoError(t, err)
	var decodedNoRate map[string]any
	require.NoError(t, json.Unmarshal(rawNoRate, &decodedNoRate))
	_, hasRate := decodedNoRate["user_rate_multiplier"]
	require.False(t, hasRate, "无专属倍率时 user_rate_multiplier 应 omitempty")
}

func TestToModelPlazaOfficialPricing_NilPassthrough(t *testing.T) {
	require.Nil(t, toModelPlazaOfficialPricing(nil))
}

func testPtr(v float64) *float64 { return &v }