package util

import (
	"bufio"
	"fmt"
	"io"
	"net/url"
	"os"
	"strings"
	"time"

	"go.uber.org/automaxprocs/maxprocs"

	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"

	"github.com/argoproj/gitops-engine/pkg/utils/kube"

	log "github.com/sirupsen/logrus"
	"github.com/spf13/cobra"
	"github.com/spf13/pflag"
	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/utils/ptr"

	"github.com/argoproj/argo-cd/v2/pkg/apis/application"
	argoappv1 "github.com/argoproj/argo-cd/v2/pkg/apis/application/v1alpha1"
	"github.com/argoproj/argo-cd/v2/util/argo"
	"github.com/argoproj/argo-cd/v2/util/config"
	"github.com/argoproj/argo-cd/v2/util/errors"
	"github.com/argoproj/argo-cd/v2/util/text/label"
)

type AppOptions struct {
	repoURL                         string
	appPath                         string
	chart                           string
	env                             string
	revision                        string
	revisionHistoryLimit            int
	destName                        string
	destServer                      string
	destNamespace                   string
	Parameters                      []string
	valuesFiles                     []string
	ignoreMissingValueFiles         bool
	values                          string
	releaseName                     string
	helmSets                        []string
	helmSetStrings                  []string
	helmSetFiles                    []string
	helmVersion                     string
	helmPassCredentials             bool
	helmSkipCrds                    bool
	helmSkipSchemaValidation        bool
	helmSkipTests                   bool
	helmNamespace                   string
	helmKubeVersion                 string
	helmApiVersions                 []string
	project                         string
	syncPolicy                      string
	syncOptions                     []string
	autoPrune                       bool
	selfHeal                        bool
	allowEmpty                      bool
	namePrefix                      string
	nameSuffix                      string
	directoryRecurse                bool
	configManagementPlugin          string
	jsonnetTlaStr                   []string
	jsonnetTlaCode                  []string
	jsonnetExtVarStr                []string
	jsonnetExtVarCode               []string
	jsonnetLibs                     []string
	kustomizeImages                 []string
	kustomizeReplicas               []string
	kustomizeVersion                string
	kustomizeCommonLabels           []string
	kustomizeCommonAnnotations      []string
	kustomizeLabelWithoutSelector   bool
	kustomizeForceCommonLabels      bool
	kustomizeForceCommonAnnotations bool
	kustomizeNamespace              string
	kustomizeKubeVersion            string
	kustomizeApiVersions            []string
	pluginEnvs                      []string
	Validate                        bool
	directoryExclude                string
	directoryInclude                string
	retryLimit                      int64
	retryBackoffDuration            time.Duration
	retryBackoffMaxDuration         time.Duration
	retryBackoffFactor              int64
	ref                             string
	SourceName                      string
	drySourceRepo                   string
	drySourceRevision               string
	drySourcePath                   string
	syncSourceBranch                string
	syncSourcePath                  string
	hydrateToBranch                 string
}

// SetAutoMaxProcs sets the GOMAXPROCS value based on the binary name.
// It suppresses logs for CLI binaries and logs the setting for services.
func SetAutoMaxProcs(isCLI bool) {
	if isCLI {
		_, _ = maxprocs.Set() // Intentionally ignore errors for CLI binaries
	} else {
		_, err := maxprocs.Set(maxprocs.Logger(log.Infof))
		if err != nil {
			log.Errorf("Error setting GOMAXPROCS: %v", err)
		}
	}
}

func AddAppFlags(command *cobra.Command, opts *AppOptions) {
	command.Flags().StringVar(&opts.repoURL, "repo", "", "Repository URL, ignored if a file is set")
	command.Flags().StringVar(&opts.appPath, "path", "", "Path in repository to the app directory, ignored if a file is set")
	command.Flags().StringVar(&opts.chart, "helm-chart", "", "Helm Chart name")
	command.Flags().StringVar(&opts.env, "env", "", "Application environment to monitor")
	command.Flags().StringVar(&opts.revision, "revision", "", "The tracking source branch, tag, commit or Helm chart version the application will sync to")
	command.Flags().StringVar(&opts.drySourceRepo, "dry-source-repo", "", "Repository URL of the app dry source")
	command.Flags().StringVar(&opts.drySourceRevision, "dry-source-revision", "", "Revision of the app dry source")
	command.Flags().StringVar(&opts.drySourcePath, "dry-source-path", "", "Path in repository to the app directory for the dry source")
	command.Flags().StringVar(&opts.syncSourceBranch, "sync-source-branch", "", "The branch from which the app will sync")
	command.Flags().StringVar(&opts.syncSourcePath, "sync-source-path", "", "The path in the repository from which the app will sync")
	command.Flags().StringVar(&opts.hydrateToBranch, "hydrate-to-branch", "", "The branch to hydrate the app to")
	command.Flags().IntVar(&opts.revisionHistoryLimit, "revision-history-limit", argoappv1.RevisionHistoryLimit, "How many items to keep in revision history")
	command.Flags().StringVar(&opts.destServer, "dest-server", "", "K8s cluster URL (e.g. https://kubernetes.default.svc)")
	command.Flags().StringVar(&opts.destName, "dest-name", "", "K8s cluster Name (e.g. minikube)")
	command.Flags().StringVar(&opts.destNamespace, "dest-namespace", "", "K8s target namespace")
	command.Flags().StringArrayVarP(&opts.Parameters, "parameter", "p", []string{}, "set a parameter override (e.g. -p guestbook=image=example/guestbook:latest)")
	command.Flags().StringArrayVar(&opts.valuesFiles, "values", []string{}, "Helm values file(s) to use")
	command.Flags().BoolVar(&opts.ignoreMissingValueFiles, "ignore-missing-value-files", false, "Ignore locally missing valueFiles when setting helm template --values")
	command.Flags().StringVar(&opts.values, "values-literal-file", "", "Filename or URL to import as a literal Helm values block")
	command.Flags().StringVar(&opts.releaseName, "release-name", "", "Helm release-name")
	command.Flags().StringVar(&opts.helmVersion, "helm-version", "", "Helm version")
	command.Flags().BoolVar(&opts.helmPassCredentials, "helm-pass-credentials", false, "Pass credentials to all domain")
	command.Flags().StringArrayVar(&opts.helmSets, "helm-set", []string{}, "Helm set values on the command line (can be repeated to set several values: --helm-set key1=val1 --helm-set key2=val2)")
	command.Flags().StringArrayVar(&opts.helmSetStrings, "helm-set-string", []string{}, "Helm set STRING values on the command line (can be repeated to set several values: --helm-set-string key1=val1 --helm-set-string key2=val2)")
	command.Flags().StringArrayVar(&opts.helmSetFiles, "helm-set-file", []string{}, "Helm set values from respective files specified via the command line (can be repeated to set several values: --helm-set-file key1=path1 --helm-set-file key2=path2)")
	command.Flags().BoolVar(&opts.helmSkipCrds, "helm-skip-crds", false, "Skip helm crd installation step")
	command.Flags().BoolVar(&opts.helmSkipSchemaValidation, "helm-skip-schema-validation", false, "Skip helm schema validation step")
	command.Flags().BoolVar(&opts.helmSkipTests, "helm-skip-tests", false, "Skip helm test manifests installation step")
	command.Flags().StringVar(&opts.helmNamespace, "helm-namespace", "", "Helm namespace to use when running helm template. If not set, use app.spec.destination.namespace")
	command.Flags().StringVar(&opts.helmKubeVersion, "helm-kube-version", "", "Helm kube-version to use when running helm template. If not set, use the kube version from the destination cluster")
	command.Flags().StringArrayVar(&opts.helmApiVersions, "helm-api-versions", []string{}, "Helm api-versions (in format [group/]version/kind) to use when running helm template (Can be repeated to set several values: --helm-api-versions traefik.io/v1alpha1/TLSOption --helm-api-versions v1/Service). If not set, use the api-versions from the destination cluster")
	command.Flags().StringVar(&opts.project, "project", "", "Application project name")
	command.Flags().StringVar(&opts.syncPolicy, "sync-policy", "", "Set the sync policy (one of: manual (aliases of manual: none), automated (aliases of automated: auto, automatic))")
	command.Flags().StringArrayVar(&opts.syncOptions, "sync-option", []string{}, "Add or remove a sync option, e.g add `Prune=false`. Remove using `!` prefix, e.g. `!Prune=false`")
	command.Flags().BoolVar(&opts.autoPrune, "auto-prune", false, "Set automatic pruning when sync is automated")
	command.Flags().BoolVar(&opts.selfHeal, "self-heal", false, "Set self healing when sync is automated")
	command.Flags().BoolVar(&opts.allowEmpty, "allow-empty", false, "Set allow zero live resources when sync is automated")
	command.Flags().StringVar(&opts.namePrefix, "nameprefix", "", "Kustomize nameprefix")
	command.Flags().StringVar(&opts.nameSuffix, "namesuffix", "", "Kustomize namesuffix")
	command.Flags().StringVar(&opts.kustomizeVersion, "kustomize-version", "", "Kustomize version")
	command.Flags().BoolVar(&opts.directoryRecurse, "directory-recurse", false, "Recurse directory")
	command.Flags().StringVar(&opts.configManagementPlugin, "config-management-plugin", "", "Config management plugin name")
	command.Flags().StringArrayVar(&opts.jsonnetTlaStr, "jsonnet-tla-str", []string{}, "Jsonnet top level string arguments")
	command.Flags().StringArrayVar(&opts.jsonnetTlaCode, "jsonnet-tla-code", []string{}, "Jsonnet top level code arguments")
	command.Flags().StringArrayVar(&opts.jsonnetExtVarStr, "jsonnet-ext-var-str", []string{}, "Jsonnet string ext var")
	command.Flags().StringArrayVar(&opts.jsonnetExtVarCode, "jsonnet-ext-var-code", []string{}, "Jsonnet ext var")
	command.Flags().StringArrayVar(&opts.jsonnetLibs, "jsonnet-libs", []string{}, "Additional jsonnet libs (prefixed by repoRoot)")
	command.Flags().StringArrayVar(&opts.kustomizeImages, "kustomize-image", []string{}, "Kustomize images (e.g. --kustomize-image node:8.15.0 --kustomize-image mysql=mariadb,alpine@sha256:24a0c4b4a4c0eb97a1aabb8e29f18e917d05abfe1b7a7c07857230879ce7d3d)")
	command.Flags().StringArrayVar(&opts.kustomizeReplicas, "kustomize-replica", []string{}, "Kustomize replicas (e.g. --kustomize-replica my-development=2 --kustomize-replica my-statefulset=4)")
	command.Flags().StringArrayVar(&opts.pluginEnvs, "plugin-env", []string{}, "Additional plugin envs")
	command.Flags().BoolVar(&opts.Validate, "validate", true, "Validation of repo and cluster")
	command.Flags().StringArrayVar(&opts.kustomizeCommonLabels, "kustomize-common-label", []string{}, "Set common labels in Kustomize")
	command.Flags().StringArrayVar(&opts.kustomizeCommonAnnotations, "kustomize-common-annotation", []string{}, "Set common labels in Kustomize")
	command.Flags().BoolVar(&opts.kustomizeLabelWithoutSelector, "kustomize-label-without-selector", false, "Do not apply common label to selectors or templates")
	command.Flags().BoolVar(&opts.kustomizeForceCommonLabels, "kustomize-force-common-label", false, "Force common labels in Kustomize")
	command.Flags().BoolVar(&opts.kustomizeForceCommonAnnotations, "kustomize-force-common-annotation", false, "Force common annotations in Kustomize")
	command.Flags().StringVar(&opts.kustomizeNamespace, "kustomize-namespace", "", "Kustomize namespace")
	command.Flags().StringVar(&opts.kustomizeKubeVersion, "kustomize-kube-version", "", "kube-version to use when running helm template. If not set, use the kube version from the destination cluster. Only applicable when Helm is enabled for Kustomize builds")
	command.Flags().StringArrayVar(&opts.kustomizeApiVersions, "kustomize-api-versions", nil, "api-versions (in format [group/]version/kind) to use when running helm template (Can be repeated to set several values: --helm-api-versions traefik.io/v1alpha1/TLSOption --helm-api-versions v1/Service). If not set, use the api-versions from the destination cluster. Only applicable when Helm is enabled for Kustomize builds")
	command.Flags().StringVar(&opts.directoryExclude, "directory-exclude", "", "Set glob expression used to exclude files from application source path")
	command.Flags().StringVar(&opts.directoryInclude, "directory-include", "", "Set glob expression used to include files from application source path")
	command.Flags().Int64Var(&opts.retryLimit, "sync-retry-limit", 0, "Max number of allowed sync retries")
	command.Flags().DurationVar(&opts.retryBackoffDuration, "sync-retry-backoff-duration", argoappv1.DefaultSyncRetryDuration, "Sync retry backoff base duration. Input needs to be a duration (e.g. 2m, 1h)")
	command.Flags().DurationVar(&opts.retryBackoffMaxDuration, "sync-retry-backoff-max-duration", argoappv1.DefaultSyncRetryMaxDuration, "Max sync retry backoff duration. Input needs to be a duration (e.g. 2m, 1h)")
	command.Flags().Int64Var(&opts.retryBackoffFactor, "sync-retry-backoff-factor", argoappv1.DefaultSyncRetryFactor, "Factor multiplies the base duration after each failed sync retry")
	command.Flags().StringVar(&opts.ref, "ref", "", "Ref is reference to another source within sources field")
	command.Flags().StringVar(&opts.SourceName, "source-name", "", "Name of the source from the list of sources of the app.")
}

func SetAppSpecOptions(flags *pflag.FlagSet, spec *argoappv1.ApplicationSpec, appOpts *AppOptions, sourcePosition int) int {
	visited := 0
	if flags == nil {
		return visited
	}
	var h *argoappv1.SourceHydrator
	h, hasHydratorFlag := constructSourceHydrator(spec.SourceHydrator, *appOpts, flags)
	if hasHydratorFlag {
		spec.SourceHydrator = h
	} else {
		source := spec.GetSourcePtrByPosition(sourcePosition)
		if source == nil {
			source = &argoappv1.ApplicationSource{}
		}
		source, visited = ConstructSource(source, *appOpts, flags)
		if spec.HasMultipleSources() {
			if sourcePosition == 0 {
				spec.Sources[sourcePosition] = *source
			} else if sourcePosition > 0 {
				spec.Sources[sourcePosition-1] = *source
			} else {
				spec.Sources = append(spec.Sources, *source)
			}
		} else {
			spec.Source = source
		}
	}
	flags.Visit(func(f *pflag.Flag) {
		visited++

		switch f.Name {
		case "revision-history-limit":
			i := int64(appOpts.revisionHistoryLimit)
			spec.RevisionHistoryLimit = &i
		case "dest-name":
			spec.Destination.Name = appOpts.destName
		case "dest-server":
			spec.Destination.Server = appOpts.destServer
		case "dest-namespace":
			spec.Destination.Namespace = appOpts.destNamespace
		case "project":
			spec.Project = appOpts.project
		case "sync-policy":
			switch appOpts.syncPolicy {
			case "none", "manual":
				if spec.SyncPolicy != nil {
					spec.SyncPolicy.Automated = nil
				}
				if spec.SyncPolicy.IsZero() {
					spec.SyncPolicy = nil
				}
			case "automated", "automatic", "auto":
				if spec.SyncPolicy == nil {
					spec.SyncPolicy = &argoappv1.SyncPolicy{}
				}
				spec.SyncPolicy.Automated = &argoappv1.SyncPolicyAutomated{}
			default:
				log.Fatalf("Invalid sync-policy: %s", appOpts.syncPolicy)
			}
		case "sync-option":
			if spec.SyncPolicy == nil {
				spec.SyncPolicy = &argoappv1.SyncPolicy{}
			}
			for _, option := range appOpts.syncOptions {
				// `!` means remove the option
				if strings.HasPrefix(option, "!") {
					option = strings.TrimPrefix(option, "!")
					spec.SyncPolicy.SyncOptions = spec.SyncPolicy.SyncOptions.RemoveOption(option)
				} else {
					spec.SyncPolicy.SyncOptions = spec.SyncPolicy.SyncOptions.AddOption(option)
				}
			}
			if spec.SyncPolicy.IsZero() {
				spec.SyncPolicy = nil
			}
		case "sync-retry-limit":
			if appOpts.retryLimit > 0 {
				if spec.SyncPolicy == nil {
					spec.SyncPolicy = &argoappv1.SyncPolicy{}
				}
				spec.SyncPolicy.Retry = &argoappv1.RetryStrategy{
					Limit: appOpts.retryLimit,
					Backoff: &argoappv1.Backoff{
						Duration:    appOpts.retryBackoffDuration.String(),
						MaxDuration: appOpts.retryBackoffMaxDuration.String(),
						Factor:      ptr.To(appOpts.retryBackoffFactor),
					},
				}
			} else if appOpts.retryLimit == 0 {
				if spec.SyncPolicy.IsZero() {
					spec.SyncPolicy = nil
				} else {
					spec.SyncPolicy.Retry = nil
				}
			} else {
				log.Fatalf("Invalid sync-retry-limit [%d]", appOpts.retryLimit)
			}
		}
	})
	if flags.Changed("auto-prune") {
		if spec.SyncPolicy == nil || spec.SyncPolicy.Automated == nil {
			log.Fatal("Cannot set --auto-prune: application not configured with automatic sync")
		}
		spec.SyncPolicy.Automated.Prune = appOpts.autoPrune
	}
	if flags.Changed("self-heal") {
		if spec.SyncPolicy == nil || spec.SyncPolicy.Automated == nil {
			log.Fatal("Cannot set --self-heal: application not configured with automatic sync")
		}
		spec.SyncPolicy.Automated.SelfHeal = appOpts.selfHeal
	}
	if flags.Changed("allow-empty") {
		if spec.SyncPolicy == nil || spec.SyncPolicy.Automated == nil {
			log.Fatal("Cannot set --allow-empty: application not configured with automatic sync")
		}
		spec.SyncPolicy.Automated.AllowEmpty = appOpts.allowEmpty
	}

	return visited
}

type kustomizeOpts struct {
	namePrefix             string
	nameSuffix             string
	images                 []string
	replicas               []string
	version                string
	commonLabels           map[string]string
	commonAnnotations      map[string]string
	labelWithoutSelector   bool
	forceCommonLabels      bool
	forceCommonAnnotations bool
	namespace              string
	kubeVersion            string
	apiVersions            []string
}

func setKustomizeOpt(src *argoappv1.ApplicationSource, opts kustomizeOpts) {
	if src.Kustomize == nil {
		src.Kustomize = &argoappv1.ApplicationSourceKustomize{}
	}
	if opts.version != "" {
		src.Kustomize.Version = opts.version
	}
	if opts.namePrefix != "" {
		src.Kustomize.NamePrefix = opts.namePrefix
	}
	if opts.nameSuffix != "" {
		src.Kustomize.NameSuffix = opts.nameSuffix
	}
	if opts.namespace != "" {
		src.Kustomize.Namespace = opts.namespace
	}
	if opts.kubeVersion != "" {
		src.Kustomize.KubeVersion = opts.kubeVersion
	}
	if len(opts.apiVersions) > 0 {
		src.Kustomize.APIVersions = opts.apiVersions
	}
	if opts.commonLabels != nil {
		src.Kustomize.CommonLabels = opts.commonLabels
	}
	if opts.commonAnnotations != nil {
		src.Kustomize.CommonAnnotations = opts.commonAnnotations
	}
	if opts.labelWithoutSelector {
		src.Kustomize.LabelWithoutSelector = opts.labelWithoutSelector
	}
	if opts.forceCommonLabels {
		src.Kustomize.ForceCommonLabels = opts.forceCommonLabels
	}
	if opts.forceCommonAnnotations {
		src.Kustomize.ForceCommonAnnotations = opts.forceCommonAnnotations
	}
	for _, image := range opts.images {
		src.Kustomize.MergeImage(argoappv1.KustomizeImage(image))
	}
	for _, replica := range opts.replicas {
		r, err := argoappv1.NewKustomizeReplica(replica)
		if err != nil {
			log.Fatal(err)
		}
		src.Kustomize.MergeReplica(*r)
	}

	if src.Kustomize.IsZero() {
		src.Kustomize = nil
	}
}

func setPluginOptEnvs(src *argoappv1.ApplicationSource, envs []string) {
	if src.Plugin == nil {
		src.Plugin = &argoappv1.ApplicationSourcePlugin{}
	}

	for _, text := range envs {
		e, err := argoappv1.NewEnvEntry(text)
		if err != nil {
			log.Fatal(err)
		}
		src.Plugin.AddEnvEntry(e)
	}
}

type helmOpts struct {
	valueFiles              []string
	ignoreMissingValueFiles bool
	values                  string
	releaseName             string
	version                 string
	helmSets                []string
	helmSetStrings          []string
	helmSetFiles            []string
	passCredentials         bool
	skipCrds                bool
	skipSchemaValidation    bool
	skipTests               bool
	namespace               string
	kubeVersion             string
	apiVersions             []string
}

func setHelmOpt(src *argoappv1.ApplicationSource, opts helmOpts) {
	if src.Helm == nil {
		src.Helm = &argoappv1.ApplicationSourceHelm{}
	}
	if len(opts.valueFiles) > 0 {
		src.Helm.ValueFiles = opts.valueFiles
	}
	if opts.ignoreMissingValueFiles {
		src.Helm.IgnoreMissingValueFiles = opts.ignoreMissingValueFiles
	}
	if len(opts.values) > 0 {
		err := src.Helm.SetValuesString(opts.values)
		if err != nil {
			log.Fatal(err)
		}
	}
	if opts.releaseName != "" {
		src.Helm.ReleaseName = opts.releaseName
	}
	if opts.version != "" {
		src.Helm.Version = opts.version
	}
	if opts.passCredentials {
		src.Helm.PassCredentials = opts.passCredentials
	}
	if opts.skipCrds {
		src.Helm.SkipCrds = opts.skipCrds
	}
	if opts.skipSchemaValidation {
		src.Helm.SkipSchemaValidation = opts.skipSchemaValidation
	}
	if opts.skipTests {
		src.Helm.SkipTests = opts.skipTests
	}
	if opts.namespace != "" {
		src.Helm.Namespace = opts.namespace
	}
	if opts.kubeVersion != "" {
		src.Helm.KubeVersion = opts.kubeVersion
	}
	if len(opts.apiVersions) > 0 {
		src.Helm.APIVersions = opts.apiVersions
	}
	for _, text := range opts.helmSets {
		p, err := argoappv1.NewHelmParameter(text, false)
		if err != nil {
			log.Fatal(err)
		}
		src.Helm.AddParameter(*p)
	}
	for _, text := range opts.helmSetStrings {
		p, err := argoappv1.NewHelmParameter(text, true)
		if err != nil {
			log.Fatal(err)
		}
		src.Helm.AddParameter(*p)
	}
	for _, text := range opts.helmSetFiles {
		p, err := argoappv1.NewHelmFileParameter(text)
		if err != nil {
			log.Fatal(err)
		}
		src.Helm.AddFileParameter(*p)
	}
	if src.Helm.IsZero() {
		src.Helm = nil
	}
}

func setJsonnetOpt(src *argoappv1.ApplicationSource, tlaParameters []string, code bool) {
	if src.Directory == nil {
		src.Directory = &argoappv1.ApplicationSourceDirectory{}
	}
	for _, j := range tlaParameters {
		src.Directory.Jsonnet.TLAs = append(src.Directory.Jsonnet.TLAs, argoappv1.NewJsonnetVar(j, code))
	}
}

func setJsonnetOptExtVar(src *argoappv1.ApplicationSource, jsonnetExtVar []string, code bool) {
	if src.Directory == nil {
		src.Directory = &argoappv1.ApplicationSourceDirectory{}
	}
	for _, j := range jsonnetExtVar {
		src.Directory.Jsonnet.ExtVars = append(src.Directory.Jsonnet.ExtVars, argoappv1.NewJsonnetVar(j, code))
	}
}

func setJsonnetOptLibs(src *argoappv1.ApplicationSource, libs []string) {
	if src.Directory == nil {
		src.Directory = &argoappv1.ApplicationSourceDirectory{}
	}
	src.Directory.Jsonnet.Libs = append(src.Directory.Jsonnet.Libs, libs...)
}

// SetParameterOverrides updates an existing or appends a new parameter override in the application
// The app is assumed to be a helm app and is expected to be in the form:
// param=value
func SetParameterOverrides(app *argoappv1.Application, parameters []string, index int) {
	if len(parameters) == 0 {
		return
	}
	source := app.Spec.GetSourcePtrByIndex(index)
	var sourceType argoappv1.ApplicationSourceType
	if st, _ := source.ExplicitType(); st != nil {
		sourceType = *st
	} else if app.Status.SourceType != "" {
		sourceType = app.Status.SourceType
	} else if len(strings.SplitN(parameters[0], "=", 2)) == 2 {
		sourceType = argoappv1.ApplicationSourceTypeHelm
	}

	switch sourceType {
	case argoappv1.ApplicationSourceTypeHelm:
		if source.Helm == nil {
			source.Helm = &argoappv1.ApplicationSourceHelm{}
		}
		for _, p := range parameters {
			newParam, err := argoappv1.NewHelmParameter(p, false)
			if err != nil {
				log.Error(err)
				continue
			}
			source.Helm.AddParameter(*newParam)
		}
	default:
		log.Fatalf("Parameters can only be set against Helm applications")
	}
}

func readApps(yml []byte, apps *[]*argoappv1.Application) error {
	yamls, _ := kube.SplitYAMLToString(yml)

	var err error

	for _, yml := range yamls {
		var app argoappv1.Application
		err = config.Unmarshal([]byte(yml), &app)
		*apps = append(*apps, &app)
		if err != nil {
			return err
		}
	}

	return err
}

func readAppsFromStdin(apps *[]*argoappv1.Application) error {
	reader := bufio.NewReader(os.Stdin)
	data, err := io.ReadAll(reader)
	if err != nil {
		return err
	}
	err = readApps(data, apps)
	if err != nil {
		return fmt.Errorf("unable to read manifest from stdin: %w", err)
	}
	return nil
}

func readAppsFromURI(fileURL string, apps *[]*argoappv1.Application) error {
	readFilePayload := func() ([]byte, error) {
		parsedURL, err := url.ParseRequestURI(fileURL)
		if err != nil || !(parsedURL.Scheme == "http" || parsedURL.Scheme == "https") {
			return os.ReadFile(fileURL)
		}
		return config.ReadRemoteFile(fileURL)
	}

	yml, err := readFilePayload()
	if err != nil {
		return err
	}

	return readApps(yml, apps)
}

func constructAppsFromStdin() ([]*argoappv1.Application, error) {
	apps := make([]*argoappv1.Application, 0)
	// read stdin
	err := readAppsFromStdin(&apps)
	if err != nil {
		return nil, err
	}
	return apps, nil
}

func constructAppsBaseOnName(appName string, labels, annotations, args []string, appOpts AppOptions, flags *pflag.FlagSet) ([]*argoappv1.Application, error) {
	var app *argoappv1.Application

	// read arguments
	if len(args) == 1 {
		if appName != "" && appName != args[0] {
			return nil, fmt.Errorf("--name argument '%s' does not match app name %s", appName, args[0])
		}
		appName = args[0]
	}
	appName, appNs := argo.ParseFromQualifiedName(appName, "")
	app = &argoappv1.Application{
		TypeMeta: v1.TypeMeta{
			Kind:       application.ApplicationKind,
			APIVersion: application.Group + "/v1alpha1",
		},
		ObjectMeta: v1.ObjectMeta{
			Name:      appName,
			Namespace: appNs,
		},
		Spec: argoappv1.ApplicationSpec{},
	}
	SetAppSpecOptions(flags, &app.Spec, &appOpts, 0)
	SetParameterOverrides(app, appOpts.Parameters, 0)
	mergeLabels(app, labels)
	setAnnotations(app, annotations)
	return []*argoappv1.Application{
		app,
	}, nil
}

func constructAppsFromFileUrl(fileURL, appName string, labels, annotations, args []string, appOpts AppOptions, flags *pflag.FlagSet) ([]*argoappv1.Application, error) {
	apps := make([]*argoappv1.Application, 0)
	// read uri
	err := readAppsFromURI(fileURL, &apps)
	if err != nil {
		return nil, err
	}
	for _, app := range apps {
		if len(args) == 1 && args[0] != app.Name {
			return nil, fmt.Errorf("app name '%s' does not match app spec metadata.name '%s'", args[0], app.Name)
		}
		if appName != "" && appName != app.Name {
			app.Name = appName
		}
		if app.Name == "" {
			return nil, fmt.Errorf("app.Name is empty. --name argument can be used to provide app.Name")
		}

		mergeLabels(app, labels)
		setAnnotations(app, annotations)

		// do not allow overrides for applications with multiple sources
		if !app.Spec.HasMultipleSources() {
			SetAppSpecOptions(flags, &app.Spec, &appOpts, 0)
			SetParameterOverrides(app, appOpts.Parameters, 0)
		}
	}
	return apps, nil
}

func ConstructApps(fileURL, appName string, labels, annotations, args []string, appOpts AppOptions, flags *pflag.FlagSet) ([]*argoappv1.Application, error) {
	if fileURL == "-" {
		return constructAppsFromStdin()
	} else if fileURL != "" {
		return constructAppsFromFileUrl(fileURL, appName, labels, annotations, args, appOpts, flags)
	}

	return constructAppsBaseOnName(appName, labels, annotations, args, appOpts, flags)
}

func ConstructSource(source *argoappv1.ApplicationSource, appOpts AppOptions, flags *pflag.FlagSet) (*argoappv1.ApplicationSource, int) {
	visited := 0
	flags.Visit(func(f *pflag.Flag) {
		visited++
		switch f.Name {
		case "repo":
			source.RepoURL = appOpts.repoURL
		case "path":
			source.Path = appOpts.appPath
		case "helm-chart":
			source.Chart = appOpts.chart
		case "revision":
			source.TargetRevision = appOpts.revision
		case "values":
			setHelmOpt(source, helmOpts{valueFiles: appOpts.valuesFiles})
		case "ignore-missing-value-files":
			setHelmOpt(source, helmOpts{ignoreMissingValueFiles: appOpts.ignoreMissingValueFiles})
		case "values-literal-file":
			var data []byte
			// read uri
			parsedURL, err := url.ParseRequestURI(appOpts.values)
			if err != nil || !(parsedURL.Scheme == "http" || parsedURL.Scheme == "https") {
				data, err = os.ReadFile(appOpts.values)
			} else {
				data, err = config.ReadRemoteFile(appOpts.values)
			}
			errors.CheckError(err)
			setHelmOpt(source, helmOpts{values: string(data)})
		case "release-name":
			setHelmOpt(source, helmOpts{releaseName: appOpts.releaseName})
		case "helm-version":
			setHelmOpt(source, helmOpts{version: appOpts.helmVersion})
		case "helm-pass-credentials":
			setHelmOpt(source, helmOpts{passCredentials: appOpts.helmPassCredentials})
		case "helm-set":
			setHelmOpt(source, helmOpts{helmSets: appOpts.helmSets})
		case "helm-set-string":
			setHelmOpt(source, helmOpts{helmSetStrings: appOpts.helmSetStrings})
		case "helm-set-file":
			setHelmOpt(source, helmOpts{helmSetFiles: appOpts.helmSetFiles})
		case "helm-skip-crds":
			setHelmOpt(source, helmOpts{skipCrds: appOpts.helmSkipCrds})
		case "helm-skip-schema-validation":
			setHelmOpt(source, helmOpts{skipSchemaValidation: appOpts.helmSkipSchemaValidation})
		case "helm-skip-tests":
			setHelmOpt(source, helmOpts{skipTests: appOpts.helmSkipTests})
		case "helm-namespace":
			setHelmOpt(source, helmOpts{namespace: appOpts.helmNamespace})
		case "helm-kube-version":
			setHelmOpt(source, helmOpts{kubeVersion: appOpts.helmKubeVersion})
		case "helm-api-versions":
			setHelmOpt(source, helmOpts{apiVersions: appOpts.helmApiVersions})
		case "directory-recurse":
			if source.Directory != nil {
				source.Directory.Recurse = appOpts.directoryRecurse
			} else {
				source.Directory = &argoappv1.ApplicationSourceDirectory{Recurse: appOpts.directoryRecurse}
			}
		case "directory-exclude":
			if source.Directory != nil {
				source.Directory.Exclude = appOpts.directoryExclude
			} else {
				source.Directory = &argoappv1.ApplicationSourceDirectory{Exclude: appOpts.directoryExclude}
			}
		case "directory-include":
			if source.Directory != nil {
				source.Directory.Include = appOpts.directoryInclude
			} else {
				source.Directory = &argoappv1.ApplicationSourceDirectory{Include: appOpts.directoryInclude}
			}
		case "config-management-plugin":
			source.Plugin = &argoappv1.ApplicationSourcePlugin{Name: appOpts.configManagementPlugin}
		case "nameprefix":
			setKustomizeOpt(source, kustomizeOpts{namePrefix: appOpts.namePrefix})
		case "namesuffix":
			setKustomizeOpt(source, kustomizeOpts{nameSuffix: appOpts.nameSuffix})
		case "kustomize-image":
			setKustomizeOpt(source, kustomizeOpts{images: appOpts.kustomizeImages})
		case "kustomize-replica":
			setKustomizeOpt(source, kustomizeOpts{replicas: appOpts.kustomizeReplicas})
		case "kustomize-version":
			setKustomizeOpt(source, kustomizeOpts{version: appOpts.kustomizeVersion})
		case "kustomize-namespace":
			setKustomizeOpt(source, kustomizeOpts{namespace: appOpts.kustomizeNamespace})
		case "kustomize-kube-version":
			setKustomizeOpt(source, kustomizeOpts{kubeVersion: appOpts.kustomizeKubeVersion})
		case "kustomize-api-versions":
			setKustomizeOpt(source, kustomizeOpts{apiVersions: appOpts.kustomizeApiVersions})
		case "kustomize-common-label":
			parsedLabels, err := label.Parse(appOpts.kustomizeCommonLabels)
			errors.CheckError(err)
			setKustomizeOpt(source, kustomizeOpts{commonLabels: parsedLabels})
		case "kustomize-common-annotation":
			parsedAnnotations, err := label.Parse(appOpts.kustomizeCommonAnnotations)
			errors.CheckError(err)
			setKustomizeOpt(source, kustomizeOpts{commonAnnotations: parsedAnnotations})
		case "kustomize-label-without-selector":
			setKustomizeOpt(source, kustomizeOpts{labelWithoutSelector: appOpts.kustomizeLabelWithoutSelector})
		case "kustomize-force-common-label":
			setKustomizeOpt(source, kustomizeOpts{forceCommonLabels: appOpts.kustomizeForceCommonLabels})
		case "kustomize-force-common-annotation":
			setKustomizeOpt(source, kustomizeOpts{forceCommonAnnotations: appOpts.kustomizeForceCommonAnnotations})
		case "jsonnet-tla-str":
			setJsonnetOpt(source, appOpts.jsonnetTlaStr, false)
		case "jsonnet-tla-code":
			setJsonnetOpt(source, appOpts.jsonnetTlaCode, true)
		case "jsonnet-ext-var-str":
			setJsonnetOptExtVar(source, appOpts.jsonnetExtVarStr, false)
		case "jsonnet-ext-var-code":
			setJsonnetOptExtVar(source, appOpts.jsonnetExtVarCode, true)
		case "jsonnet-libs":
			setJsonnetOptLibs(source, appOpts.jsonnetLibs)
		case "plugin-env":
			setPluginOptEnvs(source, appOpts.pluginEnvs)
		case "ref":
			source.Ref = appOpts.ref
		case "source-name":
			source.Name = appOpts.SourceName
		}
	})
	return source, visited
}

// constructSourceHydrator constructs a source hydrator from the command line flags. It returns the modified source
// hydrator and a boolean indicating if any hydrator flags were set. We return instead of just modifying the source
// hydrator in place because the given hydrator `h` might be nil. In that case, we need to create a new source hydrator
// and return it.
func constructSourceHydrator(h *argoappv1.SourceHydrator, appOpts AppOptions, flags *pflag.FlagSet) (*argoappv1.SourceHydrator, bool) {
	hasHydratorFlag := false
	ensureNotNil := func(notEmpty bool) {
		hasHydratorFlag = true
		if notEmpty && h == nil {
			h = &argoappv1.SourceHydrator{}
		}
	}
	flags.Visit(func(f *pflag.Flag) {
		switch f.Name {
		case "dry-source-repo":
			ensureNotNil(appOpts.drySourceRepo != "")
			h.DrySource.RepoURL = appOpts.drySourceRepo
		case "dry-source-path":
			ensureNotNil(appOpts.drySourcePath != "")
			h.DrySource.Path = appOpts.drySourcePath
		case "dry-source-revision":
			ensureNotNil(appOpts.drySourceRevision != "")
			h.DrySource.TargetRevision = appOpts.drySourceRevision
		case "sync-source-branch":
			ensureNotNil(appOpts.syncSourceBranch != "")
			h.SyncSource.TargetBranch = appOpts.syncSourceBranch
		case "sync-source-path":
			ensureNotNil(appOpts.syncSourcePath != "")
			h.SyncSource.Path = appOpts.syncSourcePath
		case "hydrate-to-branch":
			ensureNotNil(appOpts.hydrateToBranch != "")
			if appOpts.hydrateToBranch == "" {
				h.HydrateTo = nil
			} else {
				h.HydrateTo = &argoappv1.HydrateTo{TargetBranch: appOpts.hydrateToBranch}
			}
		}
	})
	return h, hasHydratorFlag
}

func mergeLabels(app *argoappv1.Application, labels []string) {
	mapLabels, err := label.Parse(labels)
	errors.CheckError(err)

	mergedLabels := make(map[string]string)

	for name, value := range app.GetLabels() {
		mergedLabels[name] = value
	}

	for name, value := range mapLabels {
		mergedLabels[name] = value
	}

	app.SetLabels(mergedLabels)
}

func setAnnotations(app *argoappv1.Application, annotations []string) {
	if len(annotations) > 0 && app.Annotations == nil {
		app.Annotations = map[string]string{}
	}
	for _, a := range annotations {
		annotation := strings.SplitN(a, "=", 2)
		if len(annotation) == 2 {
			app.Annotations[annotation[0]] = annotation[1]
		} else {
			app.Annotations[annotation[0]] = ""
		}
	}
}

// LiveObjects deserializes the list of live states into unstructured objects
func LiveObjects(resources []*argoappv1.ResourceDiff) ([]*unstructured.Unstructured, error) {
	objs := make([]*unstructured.Unstructured, len(resources))
	for i, resState := range resources {
		obj, err := resState.LiveObject()
		if err != nil {
			return nil, err
		}
		objs[i] = obj
	}
	return objs, nil
}

func FilterResources(groupChanged bool, resources []*argoappv1.ResourceDiff, group, kind, namespace, resourceName string, all bool) ([]*unstructured.Unstructured, error) {
	liveObjs, err := LiveObjects(resources)
	errors.CheckError(err)
	filteredObjects := make([]*unstructured.Unstructured, 0)
	for i := range liveObjs {
		obj := liveObjs[i]
		if obj == nil {
			continue
		}
		gvk := obj.GroupVersionKind()
		if groupChanged && group != gvk.Group {
			continue
		}
		if namespace != "" && namespace != obj.GetNamespace() {
			continue
		}
		if resourceName != "" && resourceName != obj.GetName() {
			continue
		}
		if kind != "" && kind != gvk.Kind {
			continue
		}
		deepCopy := obj.DeepCopy()
		filteredObjects = append(filteredObjects, deepCopy)
	}
	if len(filteredObjects) == 0 {
		return nil, fmt.Errorf("No matching resource found")
	}
	if len(filteredObjects) > 1 && !all {
		return nil, fmt.Errorf("Multiple resources match inputs. Use the --all flag to patch multiple resources")
	}
	return filteredObjects, nil
}
