package api

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

	"github.com/distribution/distribution/v3/health"
)

// TestGETDownHandlerDoesNotChangeStatus ensures that calling the endpoint
// /debug/health/down with METHOD GET returns a 404
func TestGETDownHandlerDoesNotChangeStatus(t *testing.T) {
	recorder := httptest.NewRecorder()

	req, err := http.NewRequest(http.MethodGet, "https://fakeurl.com/debug/health/down", nil)
	if err != nil {
		t.Errorf("Failed to create request.")
	}

	DownHandler(recorder, req)

	if recorder.Code != 404 {
		t.Errorf("Did not get a 404.")
	}
}

// TestGETUpHandlerDoesNotChangeStatus ensures that calling the endpoint
// /debug/health/down with METHOD GET returns a 404
func TestGETUpHandlerDoesNotChangeStatus(t *testing.T) {
	recorder := httptest.NewRecorder()

	req, err := http.NewRequest(http.MethodGet, "https://fakeurl.com/debug/health/up", nil)
	if err != nil {
		t.Errorf("Failed to create request.")
	}

	DownHandler(recorder, req)

	if recorder.Code != 404 {
		t.Errorf("Did not get a 404.")
	}
}

// TestPOSTDownHandlerChangeStatus ensures the endpoint /debug/health/down changes
// the status code of the response to 503
// This test is order dependent, and should come before TestPOSTUpHandlerChangeStatus
func TestPOSTDownHandlerChangeStatus(t *testing.T) {
	recorder := httptest.NewRecorder()

	req, err := http.NewRequest(http.MethodPost, "https://fakeurl.com/debug/health/down", nil)
	if err != nil {
		t.Errorf("Failed to create request.")
	}

	DownHandler(recorder, req)

	if recorder.Code != 200 {
		t.Errorf("Did not get a 200.")
	}

	if len(health.CheckStatus(context.Background())) != 1 {
		t.Errorf("DownHandler didn't add an error check.")
	}
}

// TestPOSTUpHandlerChangeStatus ensures the endpoint /debug/health/up changes
// the status code of the response to 200
func TestPOSTUpHandlerChangeStatus(t *testing.T) {
	recorder := httptest.NewRecorder()

	req, err := http.NewRequest(http.MethodPost, "https://fakeurl.com/debug/health/up", nil)
	if err != nil {
		t.Errorf("Failed to create request.")
	}

	UpHandler(recorder, req)

	if recorder.Code != 200 {
		t.Errorf("Did not get a 200.")
	}

	if len(health.CheckStatus(context.Background())) != 0 {
		t.Errorf("UpHandler didn't remove the error check.")
	}
}