package httpapi

import (
	"bytes"
	"context"
	"fmt"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"

	"github.com/descrybe/descrybe-v2/apps/api/internal/billing"
	"github.com/descrybe/descrybe-v2/apps/api/internal/campaigns"
	"github.com/descrybe/descrybe-v2/apps/api/internal/config"
	"github.com/google/uuid"
)

func TestRequireFeatureBillingNilFailsClosedInProduction(t *testing.T) {
	t.Parallel()

	s := &Server{Config: config.Config{AppEnv: "production"}}
	h := s.RequireFeature("capability.api_access")(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
		w.WriteHeader(http.StatusNoContent)
	}))

	rec := httptest.NewRecorder()
	h.ServeHTTP(rec, httptest.NewRequest(http.MethodGet, "/gated", nil))
	if rec.Code != http.StatusServiceUnavailable {
		t.Fatalf("status=%d want 503 body=%s", rec.Code, rec.Body.String())
	}
}

func TestRequireFeatureBillingNilPassThroughOutsideProduction(t *testing.T) {
	t.Parallel()

	s := &Server{Config: config.Config{AppEnv: "development"}}
	called := false
	h := s.RequireFeature("capability.api_access")(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
		called = true
		w.WriteHeader(http.StatusNoContent)
	}))

	rec := httptest.NewRecorder()
	h.ServeHTTP(rec, httptest.NewRequest(http.MethodGet, "/gated", nil))
	if rec.Code != http.StatusNoContent || !called {
		t.Fatalf("status=%d called=%v want 204 pass-through", rec.Code, called)
	}
}

func TestRequireFeaturesPlanGateViaHook(t *testing.T) {
	t.Parallel()

	cid := uuid.MustParse("11111111-1111-1111-1111-111111111111")
	s := &Server{
		testAssertFeatures: func(_ context.Context, keys ...string) error {
			return fmt.Errorf("%w: %s", billing.ErrFeatureDisabled, keys[0])
		},
	}
	ctx := context.WithValue(context.Background(), ctxCompanyID, cid)
	req := httptest.NewRequest(http.MethodGet, "/", nil).WithContext(ctx)
	rec := httptest.NewRecorder()
	if s.requireFeatures(rec, req, "marketing.campaigns") {
		t.Fatal("requireFeatures should reject disabled feature")
	}
	if rec.Code != http.StatusPaymentRequired {
		t.Fatalf("status=%d want 402 body=%s", rec.Code, rec.Body.String())
	}
	if !strings.Contains(rec.Body.String(), "feature_disabled") {
		t.Fatalf("body=%s want feature_disabled", rec.Body.String())
	}
}

func TestCreateCampaignPlanGate(t *testing.T) {
	t.Parallel()

	cid := uuid.MustParse("11111111-1111-1111-1111-111111111111")
	uid := uuid.MustParse("aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa")
	s := &Server{
		Campaigns: &campaigns.Service{},
		testAssertFeatures: func(_ context.Context, keys ...string) error {
			return fmt.Errorf("%w: %s", billing.ErrFeatureDisabled, keys[0])
		},
	}
	ctx := context.WithValue(context.Background(), ctxUserID, uid)
	ctx = context.WithValue(ctx, ctxCompanyID, cid)
	ctx = context.WithValue(ctx, ctxRole, "admin")

	t.Run("list", func(t *testing.T) {
		t.Parallel()
		req := httptest.NewRequest(http.MethodGet, "/api/campaigns", nil).WithContext(ctx)
		rec := httptest.NewRecorder()
		s.handleListCampaigns(rec, req)
		if rec.Code != http.StatusPaymentRequired {
			t.Fatalf("status=%d want 402 body=%s", rec.Code, rec.Body.String())
		}
	})

	t.Run("create", func(t *testing.T) {
		t.Parallel()
		req := httptest.NewRequest(http.MethodPost, "/api/campaigns", bytes.NewBufferString(`{"name":"x"}`)).WithContext(ctx)
		rec := httptest.NewRecorder()
		s.handleCreateCampaign(rec, req)
		if rec.Code != http.StatusPaymentRequired {
			t.Fatalf("status=%d want 402 body=%s", rec.Code, rec.Body.String())
		}
	})
}

func TestCreateAPIKeyPlanGate(t *testing.T) {
	t.Parallel()

	cid := uuid.MustParse("11111111-1111-1111-1111-111111111111")
	uid := uuid.MustParse("aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa")
	s := &Server{
		testAssertFeatures: func(_ context.Context, keys ...string) error {
			return fmt.Errorf("%w: settings.api_keys", billing.ErrFeatureDisabled)
		},
	}
	ctx := context.WithValue(context.Background(), ctxUserID, uid)
	ctx = context.WithValue(ctx, ctxCompanyID, cid)
	ctx = context.WithValue(ctx, ctxRole, "admin")
	req := httptest.NewRequest(http.MethodPost, "/api/api-keys", bytes.NewBufferString(`{"name":"x"}`)).WithContext(ctx)
	rec := httptest.NewRecorder()
	s.handleCreateAPIKey(rec, req)
	if rec.Code != http.StatusPaymentRequired {
		t.Fatalf("status=%d want 402 body=%s", rec.Code, rec.Body.String())
	}
}

func TestCreateAPIKeyBillingNilFailsClosedInProduction(t *testing.T) {
	t.Parallel()

	cid := uuid.MustParse("11111111-1111-1111-1111-111111111111")
	uid := uuid.MustParse("aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa")
	s := &Server{Config: config.Config{AppEnv: "production"}}
	ctx := context.WithValue(context.Background(), ctxUserID, uid)
	ctx = context.WithValue(ctx, ctxCompanyID, cid)
	ctx = context.WithValue(ctx, ctxRole, "admin")
	req := httptest.NewRequest(http.MethodPost, "/api/api-keys", bytes.NewBufferString(`{"name":"x"}`)).WithContext(ctx)
	rec := httptest.NewRecorder()
	s.handleCreateAPIKey(rec, req)
	if rec.Code != http.StatusServiceUnavailable {
		t.Fatalf("status=%d want 503 body=%s", rec.Code, rec.Body.String())
	}
}

func TestUpdateShopifyConfigPlanGate(t *testing.T) {
	t.Parallel()

	cid := uuid.MustParse("11111111-1111-1111-1111-111111111111")
	uid := uuid.MustParse("aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa")
	s := &Server{
		testAssertFeatures: func(_ context.Context, keys ...string) error {
			return fmt.Errorf("%w: stores.shopify", billing.ErrFeatureDisabled)
		},
	}
	ctx := context.WithValue(context.Background(), ctxUserID, uid)
	ctx = context.WithValue(ctx, ctxCompanyID, cid)
	ctx = context.WithValue(ctx, ctxRole, "admin")
	req := httptest.NewRequest(http.MethodPut, "/api/shopify", bytes.NewBufferString(`{}`)).WithContext(ctx)
	rec := httptest.NewRecorder()
	s.handleUpdateShopifyConfig(rec, req)
	if rec.Code != http.StatusPaymentRequired {
		t.Fatalf("status=%d want 402 body=%s", rec.Code, rec.Body.String())
	}
}

func TestHandleListPublicPlansBillingNilReturnsEmpty(t *testing.T) {
	t.Parallel()

	s := &Server{Config: config.Config{WebOrigin: "http://localhost:5173"}}
	rec := httptest.NewRecorder()
	s.handleListPublicPlans(rec, httptest.NewRequest(http.MethodGet, "/api/public/plans", nil))
	if rec.Code != http.StatusOK {
		t.Fatalf("nil billing status=%d want 200 body=%s", rec.Code, rec.Body.String())
	}

	s.Billing = &billing.Service{} // non-nil service without pool must not 500
	rec2 := httptest.NewRecorder()
	s.handleListPublicPlans(rec2, httptest.NewRequest(http.MethodGet, "/api/public/plans", nil))
	if rec2.Code != http.StatusOK {
		t.Fatalf("empty billing status=%d want 200 body=%s", rec2.Code, rec2.Body.String())
	}
}

func TestHandleListPlansBillingNilServiceUnavailable(t *testing.T) {
	t.Parallel()

	s := &Server{}
	rec := httptest.NewRecorder()
	s.handleListPlans(rec, httptest.NewRequest(http.MethodGet, "/api/admin/plans", nil))
	if rec.Code != http.StatusServiceUnavailable {
		t.Fatalf("status=%d want 503 body=%s", rec.Code, rec.Body.String())
	}
}