//go:build billing

package billing

import (
	"errors"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
)

func testManager(t *testing.T) *Manager {
	t.Helper()
	cfg := &Config{
		StripeSecretKey: "sk_test_dummy",
		WebhookSecret:   "whsec_dummy",
		Tiers: []BillingTierConfig{
			{Name: "free", MaxWebhooks: 1, WebhookAllTriggers: false, AIAdvisor: false, SupporterBadge: false},
			{Name: "bosun", MaxWebhooks: 5, WebhookAllTriggers: true, AIAdvisor: true, SupporterBadge: true},
		},
	}
	// nil privateKey/db are fine: the gated paths under test never touch them.
	return New(cfg, nil, "did:web:appview", []string{"did:web:hold"}, "https://appview", nil)
}

// Off-managed users (not captains) get free-tier entitlements, and these paths
// short-circuit before any Stripe call.
func TestEntitlements_OffManagedHold_GetsFreeTier(t *testing.T) {
	m := testManager(t)
	m.SetActiveHoldChecker(func(string) bool { return false }) // self-hosted

	if m.HasAIAdvisor("did:plc:user") {
		t.Error("HasAIAdvisor should be false off a managed hold")
	}
	if max, all := m.GetWebhookLimits("did:plc:user"); max != 1 || all {
		t.Errorf("GetWebhookLimits = (%d,%v), want (1,false)", max, all)
	}
	if badge := m.GetSupporterBadge("did:plc:user"); badge != "" {
		t.Errorf("GetSupporterBadge = %q, want \"\"", badge)
	}
}

// Captains bypass the gate entirely (this short-circuits before onManagedHold).
func TestEntitlements_Captain_BypassesGate(t *testing.T) {
	m := testManager(t)
	m.SetCaptainChecker(func(string) bool { return true })
	m.SetActiveHoldChecker(func(string) bool { return false }) // even off-managed

	if !m.HasAIAdvisor("did:plc:cap") {
		t.Error("captain should have AI advisor")
	}
	if max, all := m.GetWebhookLimits("did:plc:cap"); max != -1 || !all {
		t.Errorf("captain GetWebhookLimits = (%d,%v), want (-1,true)", max, all)
	}
	if badge := m.GetSupporterBadge("did:plc:cap"); badge != "Captain" {
		t.Errorf("captain GetSupporterBadge = %q, want \"Captain\"", badge)
	}
}

func TestWebhookConfigured(t *testing.T) {
	m := testManager(t)
	if !m.WebhookConfigured() {
		t.Error("expected WebhookConfigured true when secret set")
	}

	cfg := &Config{StripeSecretKey: "sk_test_dummy", Tiers: []BillingTierConfig{{Name: "free", MaxWebhooks: 1}}}
	m2 := New(cfg, nil, "did:web:appview", nil, "https://appview", nil)
	if m2.WebhookConfigured() {
		t.Error("expected WebhookConfigured false when secret empty")
	}
}

// Empty webhook secret fails closed with a processing error (not a signature
// error), so the HTTP layer returns 5xx rather than silently accepting.
func TestHandleWebhook_EmptySecret_FailsClosed(t *testing.T) {
	cfg := &Config{StripeSecretKey: "sk_test_dummy", Tiers: []BillingTierConfig{{Name: "free", MaxWebhooks: 1}}}
	m := New(cfg, nil, "did:web:appview", nil, "https://appview", nil)

	req := httptest.NewRequest(http.MethodPost, "/api/stripe/webhook", strings.NewReader("{}"))
	err := m.HandleWebhook(req)
	if !errors.Is(err, ErrWebhookProcessing) {
		t.Fatalf("expected ErrWebhookProcessing, got %v", err)
	}
}

// A bad signature is a client error (400, no Stripe retry).
func TestHandleWebhook_BadSignature(t *testing.T) {
	m := testManager(t)
	req := httptest.NewRequest(http.MethodPost, "/api/stripe/webhook", strings.NewReader("{}"))
	req.Header.Set("Stripe-Signature", "t=123,v1=deadbeef")
	err := m.HandleWebhook(req)
	if !errors.Is(err, ErrWebhookSignature) {
		t.Fatalf("expected ErrWebhookSignature, got %v", err)
	}
}

// The HTTP handler maps signature errors to 400 and processing errors to 500.
func TestHandleStripeWebhook_StatusCodes(t *testing.T) {
	t.Run("bad signature -> 400", func(t *testing.T) {
		m := testManager(t)
		req := httptest.NewRequest(http.MethodPost, "/api/stripe/webhook", strings.NewReader("{}"))
		req.Header.Set("Stripe-Signature", "t=123,v1=deadbeef")
		rr := httptest.NewRecorder()
		m.handleStripeWebhook(rr, req)
		if rr.Code != http.StatusBadRequest {
			t.Errorf("status = %d, want 400", rr.Code)
		}
	})

	t.Run("processing error -> 500", func(t *testing.T) {
		cfg := &Config{StripeSecretKey: "sk_test_dummy", Tiers: []BillingTierConfig{{Name: "free", MaxWebhooks: 1}}}
		m := New(cfg, nil, "did:web:appview", nil, "https://appview", nil) // empty secret
		req := httptest.NewRequest(http.MethodPost, "/api/stripe/webhook", strings.NewReader("{}"))
		rr := httptest.NewRecorder()
		m.handleStripeWebhook(rr, req)
		if rr.Code != http.StatusInternalServerError {
			t.Errorf("status = %d, want 500", rr.Code)
		}
	})
}