package handler

import (
	"bytes"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
	"time"

	"github.com/gofrs/uuid/v5"
	"github.com/golang-jwt/jwt/v5"
	"github.com/saveinmed/backend-go/internal/domain"
	"github.com/saveinmed/backend-go/internal/http/middleware"
)

func newAuthedRequest(t *testing.T, method, path string, body *bytes.Buffer, secret []byte, role string, companyID *uuid.UUID) *http.Request {
	t.Helper()
	userID := uuid.Must(uuid.NewV7())
	claims := jwt.MapClaims{
		"sub":  userID.String(),
		"role": role,
		"exp":  time.Now().Add(time.Hour).Unix(),
	}
	if companyID != nil {
		claims["company_id"] = companyID.String()
	}
	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
	tokenStr, err := token.SignedString(secret)
	if err != nil {
		t.Fatalf("failed to sign token: %v", err)
	}

	req := httptest.NewRequest(method, path, body)
	req.Header.Set("Authorization", "Bearer "+tokenStr)
	req.Header.Set("Content-Type", "application/json")
	return req
}

func serveWithAuth(secret []byte, h http.Handler, req *http.Request) *httptest.ResponseRecorder {
	rec := httptest.NewRecorder()
	middleware.RequireAuth(secret)(h).ServeHTTP(rec, req)
	return rec
}

func TestAdminPaymentGatewayConfigHandlers(t *testing.T) {
	handler, repo := newTestHandlerWithRepo()
	repo.gatewayConfigs["stripe"] = domain.PaymentGatewayConfig{
		Provider:    "stripe",
		Active:      true,
		Credentials: "token",
		Environment: "sandbox",
		Commission:  0.05,
	}

	req := httptest.NewRequest(http.MethodGet, "/api/v1/admin/payment-gateways/stripe", nil)
	req.SetPathValue("provider", "stripe")
	rec := httptest.NewRecorder()
	handler.GetPaymentGatewayConfig(rec, req)

	if rec.Code != http.StatusOK {
		t.Fatalf("expected status 200, got %d", rec.Code)
	}
	if !strings.Contains(rec.Body.String(), `"provider":"stripe"`) {
		t.Fatalf("expected response to contain provider stripe, got %s", rec.Body.String())
	}

	updatePayload := bytes.NewBufferString(`{"active":true,"credentials":"updated","environment":"prod","commission":0.1}`)
	updateReq := httptest.NewRequest(http.MethodPut, "/api/v1/admin/payment-gateways/stripe", updatePayload)
	updateReq.SetPathValue("provider", "stripe")
	updateRec := httptest.NewRecorder()
	handler.UpdatePaymentGatewayConfig(updateRec, updateReq)

	if updateRec.Code != http.StatusOK {
		t.Fatalf("expected status 200, got %d", updateRec.Code)
	}
	if repo.gatewayConfigs["stripe"].Credentials != "updated" {
		t.Fatalf("expected credentials updated, got %s", repo.gatewayConfigs["stripe"].Credentials)
	}

	testReq := httptest.NewRequest(http.MethodPost, "/api/v1/admin/payment-gateways/stripe/test", nil)
	testRec := httptest.NewRecorder()
	handler.TestPaymentGateway(testRec, testReq)
	if testRec.Code != http.StatusOK {
		t.Fatalf("expected status 200, got %d", testRec.Code)
	}
}

func TestFinancialHandlers_WithAuth(t *testing.T) {
	handler, _ := newTestHandlerWithRepo()
	secret := []byte("test-secret")
	companyID := uuid.Must(uuid.NewV7())

	docPayload := bytes.NewBufferString(`{"type":"CNPJ","url":"http://example.com/doc.pdf"}`)
	docReq := newAuthedRequest(t, http.MethodPost, "/api/v1/companies/documents", docPayload, secret, "Admin", &companyID)
	docRec := serveWithAuth(secret, http.HandlerFunc(handler.UploadDocument), docReq)
	if docRec.Code != http.StatusOK {
		t.Fatalf("expected status 200, got %d", docRec.Code)
	}

	listReq := newAuthedRequest(t, http.MethodGet, "/api/v1/companies/documents", &bytes.Buffer{}, secret, "Admin", &companyID)
	listRec := serveWithAuth(secret, http.HandlerFunc(handler.GetDocuments), listReq)
	if listRec.Code != http.StatusOK {
		t.Fatalf("expected status 200, got %d", listRec.Code)
	}

	ledgerReq := newAuthedRequest(t, http.MethodGet, "/api/v1/finance/ledger?page=1&page_size=10", &bytes.Buffer{}, secret, "Admin", &companyID)
	ledgerRec := serveWithAuth(secret, http.HandlerFunc(handler.GetLedger), ledgerReq)
	if ledgerRec.Code != http.StatusOK {
		t.Fatalf("expected status 200, got %d", ledgerRec.Code)
	}

	balanceReq := newAuthedRequest(t, http.MethodGet, "/api/v1/finance/balance", &bytes.Buffer{}, secret, "Admin", &companyID)
	balanceRec := serveWithAuth(secret, http.HandlerFunc(handler.GetBalance), balanceReq)
	if balanceRec.Code != http.StatusOK {
		t.Fatalf("expected status 200, got %d", balanceRec.Code)
	}
	var balancePayload map[string]int64
	if err := json.Unmarshal(balanceRec.Body.Bytes(), &balancePayload); err != nil {
		t.Fatalf("failed to decode balance: %v", err)
	}
	if balancePayload["balance_cents"] != 100000 {
		t.Fatalf("expected balance 100000, got %d", balancePayload["balance_cents"])
	}

	withdrawPayload := bytes.NewBufferString(`{"amount_cents":5000,"bank_info":"bank"}`)
	withdrawReq := newAuthedRequest(t, http.MethodPost, "/api/v1/finance/withdrawals", withdrawPayload, secret, "Admin", &companyID)
	withdrawRec := serveWithAuth(secret, http.HandlerFunc(handler.RequestWithdrawal), withdrawReq)
	if withdrawRec.Code != http.StatusOK {
		t.Fatalf("expected status 200, got %d", withdrawRec.Code)
	}

	listWithdrawReq := newAuthedRequest(t, http.MethodGet, "/api/v1/finance/withdrawals", &bytes.Buffer{}, secret, "Admin", &companyID)
	listWithdrawRec := serveWithAuth(secret, http.HandlerFunc(handler.ListWithdrawals), listWithdrawReq)
	if listWithdrawRec.Code != http.StatusOK {
		t.Fatalf("expected status 200, got %d", listWithdrawRec.Code)
	}
}

func TestSellerPaymentHandlers(t *testing.T) {
	handler, repo := newTestHandlerWithRepo()
	secret := []byte("test-secret")
	sellerID := uuid.Must(uuid.NewV7())
	repo.sellerAccounts[sellerID] = domain.SellerPaymentAccount{
		SellerID:    sellerID,
		Gateway:     "stripe",
		Status:      "active",
		AccountType: "standard",
	}

	getReq := newAuthedRequest(t, http.MethodGet, "/api/v1/sellers/"+sellerID.String()+"/payment-config", &bytes.Buffer{}, secret, "Admin", nil)
	getReq.SetPathValue("id", sellerID.String())
	getRec := serveWithAuth(secret, http.HandlerFunc(handler.GetSellerPaymentConfig), getReq)
	if getRec.Code != http.StatusOK {
		t.Fatalf("expected status 200, got %d", getRec.Code)
	}
	if !strings.Contains(getRec.Body.String(), `"gateway":"stripe"`) {
		t.Fatalf("expected gateway stripe, got %s", getRec.Body.String())
	}

	onboardPayload := bytes.NewBufferString(`{"gateway":"stripe"}`)
	onboardReq := newAuthedRequest(t, http.MethodPost, "/api/v1/sellers/"+sellerID.String()+"/onboarding", onboardPayload, secret, "Admin", nil)
	onboardReq.SetPathValue("id", sellerID.String())
	onboardRec := serveWithAuth(secret, http.HandlerFunc(handler.OnboardSeller), onboardReq)
	if onboardRec.Code != http.StatusOK {
		t.Fatalf("expected status 200, got %d", onboardRec.Code)
	}
	if !strings.Contains(onboardRec.Body.String(), "onboarding_url") {
		t.Fatalf("expected onboarding_url, got %s", onboardRec.Body.String())
	}
}

func TestPushNotificationHandlers(t *testing.T) {
	handler := newTestHandler()
	secret := []byte("test-secret")

	registerPayload := bytes.NewBufferString(`{"token":"abc","platform":"web"}`)
	registerReq := newAuthedRequest(t, http.MethodPost, "/api/v1/push/register", registerPayload, secret, "Admin", nil)
	registerRec := serveWithAuth(secret, http.HandlerFunc(handler.RegisterPushToken), registerReq)
	if registerRec.Code != http.StatusOK {
		t.Fatalf("expected status 200, got %d", registerRec.Code)
	}

	unregisterPayload := bytes.NewBufferString(`{"token":"abc"}`)
	unregisterReq := newAuthedRequest(t, http.MethodDelete, "/api/v1/push/unregister", unregisterPayload, secret, "Admin", nil)
	unregisterRec := serveWithAuth(secret, http.HandlerFunc(handler.UnregisterPushToken), unregisterReq)
	if unregisterRec.Code != http.StatusNoContent {
		t.Fatalf("expected status 204, got %d", unregisterRec.Code)
	}

	testReq := newAuthedRequest(t, http.MethodPost, "/api/v1/push/test", &bytes.Buffer{}, secret, "Admin", nil)
	testRec := serveWithAuth(secret, http.HandlerFunc(handler.TestPushNotification), testReq)
	if testRec.Code != http.StatusOK {
		t.Fatalf("expected status 200, got %d", testRec.Code)
	}
}