package handlers

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

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"go.uber.org/fx"
	"go.uber.org/fx/fxtest"
	"sneak.berlin/go/webhooker/internal/config"
	"sneak.berlin/go/webhooker/internal/database"
	"sneak.berlin/go/webhooker/internal/delivery"
	"sneak.berlin/go/webhooker/internal/globals"
	"sneak.berlin/go/webhooker/internal/healthcheck"
	"sneak.berlin/go/webhooker/internal/logger"
	"sneak.berlin/go/webhooker/internal/session"
)

// noopNotifier is a no-op delivery.Notifier for tests.
type noopNotifier struct{}

func (n *noopNotifier) Notify([]delivery.DeliveryTask) {}

func TestHandleIndex(t *testing.T) {
	var h *Handlers

	app := fxtest.New(
		t,
		fx.Provide(
			globals.New,
			logger.New,
			func() *config.Config {
				return &config.Config{
					DataDir: t.TempDir(),
				}
			},
			database.New,
			database.NewWebhookDBManager,
			healthcheck.New,
			session.New,
			func() delivery.Notifier { return &noopNotifier{} },
			New,
		),
		fx.Populate(&h),
	)
	app.RequireStart()
	defer app.RequireStop()

	// Since we can't test actual template rendering without templates,
	// let's test that the handler is created and doesn't panic
	handler := h.HandleIndex()
	assert.NotNil(t, handler)
}

func TestRenderTemplate(t *testing.T) {
	var h *Handlers

	app := fxtest.New(
		t,
		fx.Provide(
			globals.New,
			logger.New,
			func() *config.Config {
				return &config.Config{
					DataDir: t.TempDir(),
				}
			},
			database.New,
			database.NewWebhookDBManager,
			healthcheck.New,
			session.New,
			func() delivery.Notifier { return &noopNotifier{} },
			New,
		),
		fx.Populate(&h),
	)
	app.RequireStart()
	defer app.RequireStop()

	t.Run("handles missing templates gracefully", func(t *testing.T) {
		req := httptest.NewRequest(http.MethodGet, "/", nil)
		w := httptest.NewRecorder()

		data := map[string]interface{}{
			"Version": "1.0.0",
		}

		// When a non-existent template name is requested, renderTemplate
		// should return an internal server error
		h.renderTemplate(w, req, "nonexistent.html", data)

		// Should return internal server error when template is not found
		assert.Equal(t, http.StatusInternalServerError, w.Code)
	})
}

func TestFormatUptime(t *testing.T) {
	tests := []struct {
		name     string
		duration string
		expected string
	}{
		{
			name:     "minutes only",
			duration: "45m",
			expected: "45m",
		},
		{
			name:     "hours and minutes",
			duration: "2h30m",
			expected: "2h 30m",
		},
		{
			name:     "days, hours and minutes",
			duration: "25h45m",
			expected: "1d 1h 45m",
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			d, err := time.ParseDuration(tt.duration)
			require.NoError(t, err)

			result := formatUptime(d)
			assert.Equal(t, tt.expected, result)
		})
	}
}