package notification

import (
	"path/filepath"
	"testing"

	"github.com/stretchr/testify/require"
	"gopkg.in/yaml.v3"
)

var expectedNotificationRuntimeDocumentationSnippets = []string{
	"`GET /healthz` returns `{\"status\":\"ok\"}`",
	"`GET /readyz` returns `{\"status\":\"ready\"}`",
	"`readyz` is process-local after successful startup and does not perform a live Redis ping per request",
	"there is no `/metrics` route",
	"`NOTIFICATION_INTERNAL_HTTP_ADDR` with default `:8092`",
	"`NOTIFICATION_INTERNAL_HTTP_READ_HEADER_TIMEOUT` with default `2s`",
	"`NOTIFICATION_INTERNAL_HTTP_READ_TIMEOUT` with default `10s`",
	"`NOTIFICATION_INTERNAL_HTTP_IDLE_TIMEOUT` with default `1m`",
	"`NOTIFICATION_USER_SERVICE_TIMEOUT` with default `1s`",
}

func TestNotificationRuntimeDocsStayInSync(t *testing.T) {
	t.Parallel()

	readme := loadTextFile(t, "README.md")
	runtimeDoc := loadTextFile(t, filepath.Join("docs", "runtime.md"))
	docsIndex := loadTextFile(t, filepath.Join("docs", "README.md"))
	architecture := loadTextFile(t, filepath.Join("..", "ARCHITECTURE.md"))
	testingDoc := loadTextFile(t, filepath.Join("..", "TESTING.md"))
	normalizedReadme := normalizeWhitespace(readme)
	normalizedRuntimeDoc := normalizeWhitespace(runtimeDoc)

	require.Contains(t, docsIndex, "- [Runtime and components](runtime.md)")
	require.Contains(t, architecture, "private probe HTTP listener with")
	require.Contains(t, testingDoc, "* Runtime-skeleton tests:")
	require.Contains(t, testingDoc, "* `GET /healthz`")
	require.Contains(t, testingDoc, "* `GET /readyz`")
	require.Contains(t, testingDoc, "* no `/metrics`")
	require.Contains(t, runtimeDoc, "Redis client with startup connectivity check")
	require.Contains(t, runtimeDoc, "OpenTelemetry traces and metrics exporters")

	for _, snippet := range expectedNotificationRuntimeDocumentationSnippets {
		normalizedSnippet := normalizeWhitespace(snippet)
		require.Contains(t, normalizedReadme, normalizedSnippet)
		require.Contains(t, normalizedRuntimeDoc, normalizedSnippet)
	}
}

func TestNotificationProbeOpenAPIContractDocumentsImplementedSurface(t *testing.T) {
	t.Parallel()

	specText := loadTextFile(t, "openapi.yaml")

	var spec map[string]any
	err := yaml.Unmarshal([]byte(specText), &spec)
	require.NoError(t, err)

	require.Equal(t, "3.1.0", getStringValue(t, spec, "openapi"))
	require.Equal(t, "Notification Service Probe API", getStringValue(t, getMapValue(t, spec, "info"), "title"))

	paths := getMapValue(t, spec, "paths")
	require.ElementsMatch(t, []string{"/healthz", "/readyz"}, mapKeys(paths))
	require.NotContains(t, paths, "/metrics")

	healthz := getMapValue(t, paths, "/healthz")
	readyz := getMapValue(t, paths, "/readyz")
	for _, path := range []map[string]any{healthz, readyz} {
		require.Contains(t, path, "get")
		require.NotContains(t, path, "post")

		responses := getMapValue(t, getMapValue(t, path, "get"), "responses")
		require.Contains(t, responses, "200")
		require.Equal(t, "#/components/responses/MethodNotAllowed", getStringValue(t, getMapValue(t, responses, "405"), "$ref"))
	}

	components := getMapValue(t, spec, "components")
	responses := getMapValue(t, components, "responses")
	require.Contains(t, responses, "NotFound")
	require.Contains(t, responses, "MethodNotAllowed")
}