package handler_test

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

	"golang.org/x/crypto/bcrypt"

	"github.com/labstack/echo/v4"

	"osdb/internal/handler"
)

func makeUsersMap(username, password string) map[string]string {
	h, _ := bcrypt.GenerateFromPassword([]byte(username+":"+password), bcrypt.MinCost)
	return map[string]string{username: string(h)}
}

func TestAuthHandler_Login_ValidCredentials(t *testing.T) {
	users := makeUsersMap("admin", "secret")
	h := handler.NewAuthHandler(users, "jwttest")

	body := `{"username":"admin","password":"secret"}`
	req := httptest.NewRequest(http.MethodPost, "/api/v1/auth/login", strings.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	rec := httptest.NewRecorder()
	c := echo.New().NewContext(req, rec)

	if err := h.Login(c); err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if rec.Code != http.StatusOK {
		t.Errorf("expected 200, got %d — body: %s", rec.Code, rec.Body.String())
	}
	if !strings.Contains(rec.Body.String(), "token") {
		t.Errorf("expected 'token' in response, got: %s", rec.Body.String())
	}
}

func TestAuthHandler_Login_InvalidCredentials(t *testing.T) {
	users := makeUsersMap("admin", "secret")
	h := handler.NewAuthHandler(users, "jwttest")

	body := `{"username":"admin","password":"wrong"}`
	req := httptest.NewRequest(http.MethodPost, "/api/v1/auth/login", strings.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	rec := httptest.NewRecorder()
	c := echo.New().NewContext(req, rec)

	if err := h.Login(c); err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if rec.Code != http.StatusUnauthorized {
		t.Errorf("expected 401, got %d", rec.Code)
	}
}

func TestAuthHandler_Login_MissingBody(t *testing.T) {
	users := makeUsersMap("admin", "secret")
	h := handler.NewAuthHandler(users, "jwttest")

	req := httptest.NewRequest(http.MethodPost, "/api/v1/auth/login", nil)
	req.Header.Set("Content-Type", "application/json")
	rec := httptest.NewRecorder()
	c := echo.New().NewContext(req, rec)

	if err := h.Login(c); err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if rec.Code != http.StatusUnauthorized {
		t.Errorf("expected 401, got %d", rec.Code)
	}
}