package controller

import (
	"github.com/argoproj/gitops-engine/pkg/health"
	hookutil "github.com/argoproj/gitops-engine/pkg/sync/hook"
	"github.com/argoproj/gitops-engine/pkg/sync/ignore"
	kubeutil "github.com/argoproj/gitops-engine/pkg/utils/kube"
	"k8s.io/apimachinery/pkg/runtime/schema"

	"github.com/argoproj/argo-cd/v2/pkg/apis/application"
	appv1 "github.com/argoproj/argo-cd/v2/pkg/apis/application/v1alpha1"
	"github.com/argoproj/argo-cd/v2/util/lua"
)

// setApplicationHealth updates the health statuses of all resources performed in the comparison
func setApplicationHealth(resources []managedResource, statuses []appv1.ResourceStatus, resourceOverrides map[string]appv1.ResourceOverride, app *appv1.Application, persistResourceHealth bool) (*appv1.HealthStatus, error) {
	var savedErr error
	appHealth := appv1.HealthStatus{Status: health.HealthStatusHealthy}
	for i, res := range resources {
		if res.Target != nil && hookutil.Skip(res.Target) {
			continue
		}

		if res.Live != nil && (hookutil.IsHook(res.Live) || ignore.Ignore(res.Live)) {
			continue
		}

		var healthStatus *health.HealthStatus
		var err error
		healthOverrides := lua.ResourceHealthOverrides(resourceOverrides)
		gvk := schema.GroupVersionKind{Group: res.Group, Version: res.Version, Kind: res.Kind}
		if res.Live == nil {
			healthStatus = &health.HealthStatus{Status: health.HealthStatusMissing}
		} else {
			// App the manages itself should not affect own health
			if isSelfReferencedApp(app, kubeutil.GetObjectRef(res.Live)) {
				continue
			}
			healthStatus, err = health.GetResourceHealth(res.Live, healthOverrides)
			if err != nil && savedErr == nil {
				savedErr = err
			}
		}
		if healthStatus != nil {
			if persistResourceHealth {
				resHealth := appv1.HealthStatus{Status: healthStatus.Status, Message: healthStatus.Message}
				statuses[i].Health = &resHealth
			} else {
				statuses[i].Health = nil
			}

			// Is health status is missing but resource has not built-in/custom health check then it should not affect parent app health
			if _, hasOverride := healthOverrides[lua.GetConfigMapKey(gvk)]; healthStatus.Status == health.HealthStatusMissing && !hasOverride && health.GetHealthCheckFunc(gvk) == nil {
				continue
			}

			// Missing or Unknown health status of child Argo CD app should not affect parent
			if res.Kind == application.ApplicationKind && res.Group == application.Group && (healthStatus.Status == health.HealthStatusMissing || healthStatus.Status == health.HealthStatusUnknown) {
				continue
			}

			if health.IsWorse(appHealth.Status, healthStatus.Status) {
				appHealth.Status = healthStatus.Status
			}
		}
	}
	if persistResourceHealth {
		app.Status.ResourceHealthSource = appv1.ResourceHealthLocationInline
	} else {
		app.Status.ResourceHealthSource = appv1.ResourceHealthLocationAppTree
	}
	return &appHealth, savedErr
}
